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Note: This page contains sample records for the topic "direct wind generator" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

Improved Superconducting Wire for Wind Generators: Superconducting Wires for Direct-Drive Wind Generators  

SciTech Connect

REACT Project: Brookhaven National Laboratory will develop a low-cost superconducting wire that could be used in high-power wind generators. Superconducting wire currently transports 600 times more electric current than a similarly sized copper wire, but is significantly more expensive. Brookhaven National Laboratory will develop a high-performance superconducting wire that can handle significantly more electrical current, and will demonstrate an advanced manufacturing process that has the potential to yield a several-fold reduction in wire costs while using a using negligible amount of rare earth material. This design has the potential to make a wind turbine generator lighter, more powerful, and more efficient, particularly for offshore applications.

2012-01-01T23:59:59.000Z

2

Development of a Direct Drive Permanent Magnet Generator for Small Wind Turbines  

SciTech Connect

In this program, TIAX performed the conceptual design and analysis of an innovative, modular, direct-drive permanent magnet generator (PMG) for use in small wind turbines that range in power rating from 25 kW to 100 kW. TIAX adapted an approach that has been successfully demonstrated in high volume consumer products such as direct-drive washing machines and portable generators. An electromagnetic model was created and the modular PMG design was compared to an illustrative non-modular design. The resulting projections show that the modular design can achieve significant reductions in size, weight, and manufacturing cost without compromising efficiency. Reducing generator size and weight can also lower the size and weight of other wind turbine components and hence their manufacturing cost.

Chertok, Allan; Hablanian, David; McTaggart, Paul; DOE Project Officer - Keith Bennett

2004-11-16T23:59:59.000Z

3

Manual and Semiautomated Wind Direction Editing for Use in the Generation of Synthetic Aperture Radar Wind Speed Imagery  

Science Conference Proceedings (OSTI)

Previous studies have demonstrated that satellite synthetic aperture radar (SAR) can be used as an accurate scatterometer, yielding wind speed fields with subkilometer resolution. This wind speed generation is only possible, however, if a ...

George S. Young; Todd D. Sikora; Nathaniel S. Winstead

2007-06-01T23:59:59.000Z

4

Comparative Assessment of Direct Drive High Temperature Superconducting Generators in Multi-Megawatt Class Wind Turbines  

DOE Green Energy (OSTI)

This paper summarizes the work completed under the CRADA between NREL and American Superconductor (AMSC). The CRADA combined NREL and AMSC resources to benchmark high temperature superconducting direct drive (HTSDD) generator technology by integrating the technologies into a conceptual wind turbine design, and comparing the design to geared drive and permanent magnet direct drive (PMDD) wind turbine configurations. Analysis was accomplished by upgrading the NREL Wind Turbine Design Cost and Scaling Model to represent geared and PMDD turbines at machine ratings up to 10 MW and then comparing cost and mass figures of AMSC's HTSDD wind turbine designs to theoretical geared and PMDD turbine designs at 3.1, 6, and 10 MW sizes. Based on the cost and performance data supplied by AMSC, HTSDD technology has good potential to compete successfully as an alternative technology to PMDD and geared technology turbines in the multi megawatt classes. In addition, data suggests the economics of HTSDD turbines improve with increasing size, although several uncertainties remain for all machines in the 6 to 10 MW class.

Maples, B.; Hand, M.; Musial, W.

2010-10-01T23:59:59.000Z

5

Comparative Assessment of Direct Drive High Temperature Superconducting Generators in Multi-Megawatt Class Wind Turbines  

SciTech Connect

This paper summarizes the work completed under the CRADA between NREL and American Superconductor (AMSC). The CRADA combined NREL and AMSC resources to benchmark high temperature superconducting direct drive (HTSDD) generator technology by integrating the technologies into a conceptual wind turbine design, and comparing the design to geared drive and permanent magnet direct drive (PMDD) wind turbine configurations. Analysis was accomplished by upgrading the NREL Wind Turbine Design Cost and Scaling Model to represent geared and PMDD turbines at machine ratings up to 10 MW and then comparing cost and mass figures of AMSC's HTSDD wind turbine designs to theoretical geared and PMDD turbine designs at 3.1, 6, and 10 MW sizes. Based on the cost and performance data supplied by AMSC, HTSDD technology has good potential to compete successfully as an alternative technology to PMDD and geared technology turbines in the multi megawatt classes. In addition, data suggests the economics of HTSDD turbines improve with increasing size, although several uncertainties remain for all machines in the 6 to 10 MW class.

Maples, B.; Hand, M.; Musial, W.

2010-10-01T23:59:59.000Z

6

Wind driven gas generator  

SciTech Connect

A means is provided to convert wind energy into electrical energy which, through electrolysis, forms gases to be stored under pressure, giving a form of stored energy for use at some future time by the use of a high torque, low speed vertical axis wind machine connected by direct drive to homopolar direct current generators so as to create direct current for the electrolysis of water, resulting in the breakdown of water into its basic components of hydrogen and oxygen, which are then stored under pressure until necessary for use as a source of energy.

Crehore, R.

1980-01-15T23:59:59.000Z

7

Surface Wind Direction Variability  

Science Conference Proceedings (OSTI)

Common large shifts of wind direction in the weak-wind nocturnal boundary layer are poorly understood and are not adequately captured by numerical models and statistical parameterizations. The current study examines 15 datasets representing a ...

Larry Mahrt

2011-01-01T23:59:59.000Z

8

Wind turbine having a direct-drive drivetrain - Energy Innovation ...  

A wind turbine comprising an electrical generator that includes a rotor assembly. A wind rotor that includes a wind rotor hub is directly coupled to the rotor ...

9

Kivalina wind generator  

Science Conference Proceedings (OSTI)

The project reported was to construct a system to harness the winds of an Arctic site to generate electricity that would power a greenhouse where fruit and vegetables could be raised for local consumption. The installation of the tower and an Enertech 4K wind generator are described. (LEW)

Aldrich, D.

1984-02-18T23:59:59.000Z

10

Wind lift generator  

SciTech Connect

A wind lift generator includes a housing structure formed by a pair of spaced apart plates mounted on support structure for pivotal rotation about a vertical axis at the forward end thereof for orienting into the wind, and said plates supporting a plurality of coaxially disposed sprockets arranged to support a pair of spaced apart drive chains in a quadrilateral configuration with lift foils connected and supported between the chains with the quadrilateral chain configuration supporting the chain for an initial lift mode at the forward end of the housing, followed by a direct impact mode extending from the front of the housing upward and backward to the rear of the housing and a negative lift mode extending from the top rear of the housing to the bottom with the vanes returning via a neutral mode to the front of the housing for repeating the lift cycle. A suitable electrical generator is driven from one or more shafts of the assembly driven by the drive chains.

Herman, G. R.; Martin, W. A.

1985-08-20T23:59:59.000Z

11

Original article: Lumped-parameter-based thermal analysis of a doubly radial forced-air-cooled direct-driven permanent magnet wind generator  

Science Conference Proceedings (OSTI)

A lumped-parameter-based thermal analysis of a direct-driven permanent magnet wind generator with double radial forced-air cooling is presented. In the proposed thermal model, the thermal conduction and convection as well as the heating of the cooling ... Keywords: Air cooling, Permanent magnet synchronous generator, Thermal analysis, Thermal resistance networks

Janne Nerg, Vesa Ruuskanen

2013-04-01T23:59:59.000Z

12

wind direction | OpenEI  

Open Energy Info (EERE)

direction direction Dataset Summary Description Freedom Field is a not-for-profit organization formed to facilitate development and commercialization of renewable energy solutions. The organization has installed a variety of renewable energy generating technologies at their facility (located at Rock River Water Reclamation in Rockford, IL), with the intention of serving as a demonstration facility. The facility monitors data (at 5-minute intervals) from a weather station, 12.4 kW of PV panels (56 220-watt panels), a 10kW wind turbine (HAWT), a 1.2 kW wind turbine (VAWT), an absorption cooling system, and biogas burners. Source Freedom Field Date Released July 19th, 2011 (3 years ago) Date Updated Unknown Keywords biogas monitoring data PV radiance solar temperature

13

October 11, 2011 Wind Generation  

E-Print Network (OSTI)

(CC) Power Plant #12;Wind Investors Face These Costs #12;Fixed Costs #12;Variable Costs #12;BottomESRP 285 October 11, 2011 Wind Generation · Videos · Power Point Lecture #12;Wind Videos Wind by the end of 2010 and at current rates of growth, it could double by 2014 to reach 400 GW 120 GW #12

Ford, Andrew

14

Wind Turbine/Generator Set and Method of Making Same - Energy ...  

A wind turbine comprising an electrical generator that includes a rotor assembly. A wind rotor that includes a wind rotor hub is directly coupled to the rotor ...

15

Cogging Torque Reduction in a Permanent Magnet Wind Turbine Generator...  

NLE Websites -- All DOE Office Websites (Extended Search)

The generators are usually direct-drive (i.e., no gearbox is required). Direct-drive PM generators are characterized by low maintenance and high efficiency. Small wind...

16

Contracting for wind generation  

E-Print Network (OSTI)

they would reduce the financial risk facing new entrants to the electricity market seeking new sources of funds. Nuclear power 1 This has been criticised by the House of Commons Energy and Climate Change... is considerably lower for transmission zones that only cover a part of the country, and that averaging over wider areas increases forecast accuracy. If all wind were dispatched by a single System Operator (SO) then the country-wide average would...

Newbery, David

17

The Response of Wave Directions to Changing Wind Directions  

Science Conference Proceedings (OSTI)

From the premise that the net growth of wave energy induced by wind is centered around the wind direction, a relaxation model for the response of the main wave direction to changes in the wind direction for young sea states is derived. The time ...

L. H. Holthuijsen; A. J. Kuik; E. Mosselman

1987-07-01T23:59:59.000Z

18

Wind Turbine Generator Condition Monitoring via the Generator Control Loop.  

E-Print Network (OSTI)

??This thesis focuses on the development of condition monitoring techniques for application in wind turbines, particularly for offshore wind turbine driven doubly fed induction generators. (more)

ZAGGOUT, MAHMOUD,NOUH

2013-01-01T23:59:59.000Z

19

Talkin' Bout Wind Generation | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Administration Solar Generation Has a Bright Future Talkin' Bout Wind Generation Get Daily Energy Analysis Delivered to Your Website Natural Gas Production and U.S. Oil Imports...

20

Directional Response of Ocean Waves to Changing Wind Direction  

Science Conference Proceedings (OSTI)

When analysing wave measurements in turning winds, one usually assumes that the rate of change of mean wave direction is determined by the angle between ?w, the wind direction, and ?o, the mean wave direction; however, it is well known that this ...

Gao Quanduo; Gerbrand Komen

1993-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "direct wind generator" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Why do meteorologists use wind vanes? Wind vanes are used to determine the direction of the wind. Wind  

E-Print Network (OSTI)

Fun Facts Why do meteorologists use wind vanes? Wind vanes are used to determine the direction of the wind. Wind· vanes are also called weather vanes. What do wind vanes look like on a weather station? Wind vanes that are on weather stations look a lot like the one you· made! The biggest differences

Nebraska-Lincoln, University of

22

Wind Generation Feasibility Study in Bethel, AK  

DOE Green Energy (OSTI)

This report studies the wind resources in the Yukon-Kuskokwim Health Corporation (YKHC) region, located in southwestern Alaska, and the applicability of wind generation technologies to YKHC facilities.

Tom Humphrey, YKHC; Lance Kincaid, EMCOR Energy & Technologies

2004-07-31T23:59:59.000Z

23

EERE: Renewable Electricity Generation - Wind  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

traditional sources of energy. Photo of a line of offshore wind turbines in the ocean. Solar Geothermal Wind Water Photo of a wind turbine The U.S. Department of Energy (DOE)...

24

ELECTRONIC BIVANE WIND DIRECTION INDICATOR  

DOE Patents (OSTI)

An apparatus is described for determining and recording three dimensional wind vectors. The apparatus comprises a rotatably mounted azimuthal wind component sensing head and an elevational wind component sensing head mounted to the azimuthal head and adapted to rotate therewith in the azimuthal plane and independently in the elevational plane. A heat source and thermocouples disposed thereabout are mounted within each of the sensing heads, the thermocouples providing electrical signals responsive to the temperature differential created by the passage of air through the sensing tuhes. The thermocouple signals are applied to drive mechanisms which position the sensing heads to a null wind position. Recording means are provided responsive to positional data from the drive mechanisms which are a measurement of the three dimensional wind vectors.

Moses, H.

1961-05-01T23:59:59.000Z

25

Fetch Relations for Wind-Generated Waves as a Function of Wind-Stress Scaling  

Science Conference Proceedings (OSTI)

We present the variation that results when fetch relations for wind-generated wave spectra are sealed by the friction velocity component in the dominant wave direction rather than the magnitude of the friction velocity, using the data collected ...

Will Perrie; Bechara Toulany

1990-11-01T23:59:59.000Z

26

Forced Oscillations in Wind Energy Generation Systems  

Science Conference Proceedings (OSTI)

Use of the doubly fed induction generator (DFIG) in wind energy generation systems allows variable speed operation by using partially rated back-to-back quadruple active and reactive power PWM converters. The control of the system is very complex. Despite ... Keywords: Wind energy generation system, forced oscillation, stability

Zhen Li; Siu-Chung Wong; Chi K. Tse

2009-11-01T23:59:59.000Z

27

Distributed Wind Power Generation - National Renewable Energy ...  

Technology breakthrough in roof-top distributed wind power generation Multi-billion $ market opportunity in next 10 years recent venture capital investments

28

Passively cooled direct drive wind turbine  

SciTech Connect

A wind turbine is provided that passively cools an electrical generator. The wind turbine includes a plurality of fins arranged peripherally around a generator house. Each of the fins being oriented at an angle greater than zero degrees to allow parallel flow of air over the fin. The fin is further tapered to allow a constant portion of the fin to extend beyond the air stream boundary layer. Turbulence initiators on the nose cone further enhance heat transfer at the fins.

Costin, Daniel P. (Chelsea, VT)

2008-03-18T23:59:59.000Z

29

Wind Energy Asynchronous Generator Maintenance Guidelines  

Science Conference Proceedings (OSTI)

With the rush to develop todays massive wind energy sites, little attention is being given to the inevitable need to perform routine maintenance and develop practical means of assessing the condition of the components within the nacelles and other outside support equipment for the wind farms. Current operating models have not adequately established accurate assumptions or expectations on the unavailability of the wind turbines and the impact on lost generation. Contracts for purchase of their generation ...

2012-06-20T23:59:59.000Z

30

Dual-speed wind turbine generation  

SciTech Connect

Induction generator has been used since the early development of utility-scale wind turbine generation. An induction generator is the generator of choice because of its ruggedness and low cost. With an induction generator, the operating speed of the wind turbine is limited to a narrow range (almost constant speed). Dual- speed operation can be accomplished by using an induction generator with two different sets of winding configurations or by using a dual output drive train to drive two induction generators with two different rated speeds. With single-speed operation, the wind turbine operates at different power coefficients (Cp) as the wind speed varies. Operation at maximum Cp can occur only at a single wind speed. However, if the wind speed.varies across a wider range, the operating Cp will vary significantly. Dual-speed operation has the advantage of enabling the wind turbine to operate at near maximum Cp over a wider range of wind speeds. Thus, annual energy production can be increased. The dual-speed mode may generate less energy than a variable-speed mode; nevertheless, it offers an alternative which captures more energy than single-speed operation. In this paper, dual-speed operation of a wind turbine is investigated. Annual energy production is compared between single-speed and dual-speed operation. One type of control algorithm for dual-speed operation is proposed. Some results from a dynamic simulation will be presented to show how the control algorithm works as the wind turbine is exposed to varying wind speeds.

Muljadi, E.; Butterfield, C.P. [National Renewable Energy Lab., Golden, CO (United States); Handman, D. [Flowind Corp., San Rafael, CA (United States)

1996-10-01T23:59:59.000Z

31

Directional Response of Wind Waves to a Large Wind Shift  

Science Conference Proceedings (OSTI)

The directional response of a fully arisen sea to a 90 wind shift is studied using a combination of airborne radar and in situ directional wave observations. The observations were made in February 1991 as a part of the Surface Wave Dynamics ...

Frederick C. Jackson; Robert E. Jensen

1999-11-01T23:59:59.000Z

32

Wind Direct Ltd | Open Energy Information  

Open Energy Info (EERE)

Wind Direct Ltd Wind Direct Ltd Place Solihull, United Kingdom Zip B91 2PQ Sector Wind energy Product Develops small wind farms (1-5MW) particularly for industrial customers. HgCapital provides working capital to the company and holds majority ownership of the wind assets. Coordinates 52.415065°, -1.777849° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":52.415065,"lon":-1.777849,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

33

Comparison of Three Methods for Calculating the Standard Deviation of the Wind Direction  

Science Conference Proceedings (OSTI)

Three methods to calculate wind direction standard deviation are evaluated. Although eight hours of wind data show no significant differences between the methods, synthetically generated data having standard deviations near the maximum possible ...

D. Bruce Turner

1986-05-01T23:59:59.000Z

34

Wind generator-energy storage control schemes for autonomous grid.  

E-Print Network (OSTI)

??Conventionally the power network operators were obliged to buy all the wind energy generated by wind farms. However, as the penetration of wind energy (or (more)

Fazeli, Meghdad

2011-01-01T23:59:59.000Z

35

Modeling and Control of the PMSG Wind Generation System with a Novel Controller  

Science Conference Proceedings (OSTI)

This paper is based on the maximum power point tracking (MPPT) strategy for Direct Drive Permanent Magnet Synchronous Generator Wind turbine. The parts of generator is setted in d-p synchronous rotating reference frame. And the voltage space vector PWM(SVPWM) ... Keywords: wind power system, PMSG, SVPWM, direct driven wind turbine, variable speed

Shun Yang, Lida Zhang

2013-01-01T23:59:59.000Z

36

Wind-powered generator. Final report  

DOE Green Energy (OSTI)

Completion of a wind energy conversion system for a private home is reported. The system included three blades constructed of an aluminum center with marine plywood sandwiched between the aluminum center and the fiberglass outer covering. The wind turbine drives a 1800 rpm generator by a chain drive mechanism. Battery storage is included. (LEW)

Whitesides, R E

37

Application Filing Requirements for Wind-Powered Electric Generation...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Wind-Powered Electric Generation Facilities (Ohio) Application Filing Requirements for Wind-Powered Electric Generation Facilities (Ohio) Eligibility Commercial Developer Utility...

38

Changes related to "Ningxia Yinyi Wind Power Generation Co Ltd...  

Open Energy Info (EERE)

this page on Facebook icon Twitter icon Changes related to "Ningxia Yinyi Wind Power Generation Co Ltd" Ningxia Yinyi Wind Power Generation Co Ltd Jump to:...

39

Pages that link to "Qingdao Hengfeng Wind Power Generator Co...  

Open Energy Info (EERE)

Share this page on Facebook icon Twitter icon Pages that link to "Qingdao Hengfeng Wind Power Generator Co Ltd" Qingdao Hengfeng Wind Power Generator Co Ltd Jump to:...

40

Changes related to "Nanjing Sunec Wind Generator Equipment Factory...  

Open Energy Info (EERE)

Share this page on Facebook icon Twitter icon Changes related to "Nanjing Sunec Wind Generator Equipment Factory" Nanjing Sunec Wind Generator Equipment Factory Jump...

Note: This page contains sample records for the topic "direct wind generator" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Pages that link to "Nanjing Sunec Wind Generator Equipment Factory...  

Open Energy Info (EERE)

Share this page on Facebook icon Twitter icon Pages that link to "Nanjing Sunec Wind Generator Equipment Factory" Nanjing Sunec Wind Generator Equipment Factory Jump...

42

Changes related to "Qingdao Hengfeng Wind Power Generator Co...  

Open Energy Info (EERE)

Share this page on Facebook icon Twitter icon Changes related to "Qingdao Hengfeng Wind Power Generator Co Ltd" Qingdao Hengfeng Wind Power Generator Co Ltd Jump to:...

43

Breaking of Wind-Generated Waves  

Science Conference Proceedings (OSTI)

Breaking of wind-generated waves was studies in a laboratory tank. The critical surface slope and global wave steepness for inception of breaking were evaluated. Besides the frequency of occurrence, two other characteristic quantities, height and ...

Delun Xu; Paul A. Hwang; Jin Wu

1986-12-01T23:59:59.000Z

44

Axial flux, modular, permanent-magnet generator with a toroidal winding for wind turbine applications  

SciTech Connect

Permanent-magnet generators have been used for wind turbines for many years. Many small wind turbine manufacturers use direct-drive permanent-magnet generators. For wind turbine generators, the design philosophy must cover the following characteristics: low cost, light weight, low speed, high torque, and variable speed generation. The generator is easy to manufacture and the design can be scaled up for a larger size without major retooling. A modular permanent-magnet generator with axial flux direction was chosen. The permanent magnet used is NdFeB or ferrite magnet with flux guide to focus flux density in the air gap. Each unit module of the generator may consist of one, two, or more phases. Each generator can be expanded to two or more unit modules. Each unit module is built from simple modular poles. The stator winding is formed like a torus. Thus, the assembly process is simplified and the winding insertion in the slot is less tedious. The authors built a prototype of one unit module and performed preliminary tests in the laboratory. Follow up tests will be conducted in the lab to improve the design.

Muljadi, E.; Butterfield, C.P.; Wan, Y.H.

1998-07-01T23:59:59.000Z

45

Xcel Energy Wind and Biomass Generation Mandate | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

You are here You are here Home » Xcel Energy Wind and Biomass Generation Mandate Xcel Energy Wind and Biomass Generation Mandate < Back Eligibility Investor-Owned Utility Savings Category Bioenergy Wind Buying & Making Electricity Program Info State Minnesota Program Type Renewables Portfolio Standard Provider Minnesota Department of Commerce Minnesota law (Minn. Stat. § 216B.2423) requires Xcel Energy to build or contract for 225 megawatts (MW) of installed wind-energy capacity in the state by December 31, 1998, and to build or contract for an additional 200 MW of installed capacity by December 31, 2002. The same statute also directed the Minnesota Public Utilities Commission (PUC) to require Xcel Energy to construct and operate, purchase or contract to purchase an

46

Control system for wind-powered generators  

DOE Green Energy (OSTI)

In a system of wind-powered generators, a reliable yet inexpensive control system is desirable. Such a system would be completely automatic so it could be left unattended for long periods. It would respond to electrical representations of data such as bearing temperature, vibration, wind velocity, turbine velocity, torque, or any other pertinent data. It would respond by starting or stopping the turbine, controlling the loading, or sounding an alarm. A microprocessor-based controller capable of these functions is described.

Kroth, G.J.

1977-05-01T23:59:59.000Z

47

Ningxia Yinyi Wind Power Generation Co Ltd | Open Energy Information  

Open Energy Info (EERE)

with form History Share this page on Facebook icon Twitter icon Ningxia Yinyi Wind Power Generation Co Ltd Jump to: navigation, search Name Ningxia Yinyi Wind Power...

48

Wind generating capacity is distributed unevenly across the United ...  

U.S. Energy Information Administration (EIA)

The highest concentration of wind turbines in the United States is in the Great Plains states, where the best conditions for onshore wind power generation exist.

49

Wind electric generator project. Final report  

Science Conference Proceedings (OSTI)

The wind generator is installed and connected at Iowa Western Community College. It is heating water through four hot water tanks and has proven to be an excellent demonstration project for the community. The college gets frequent inquiries about the wind mill and has been very cooperative in informing the public about the success. The windmill generates more electricity than is needed to heat four hot water heaters and future plans are to hook up more. The project requires very little maintenance. Attached is a date sheet on the project.

Not Available

1983-09-23T23:59:59.000Z

50

Power quality analysis of wind generator connected to the weak grid during low wind speed  

Science Conference Proceedings (OSTI)

Power quality analysis based on measurements performed on wind generator during low wind speed is presented in the paper. Wind generator is connected via 10 kV cable to the distribution network, where grid is weak with low value of short-circuit power. ... Keywords: distribution network, harmonics, power quality, wind speed, wind turbine

Aleksandar Nikolic; Branka Kostic; Maja Markovic; Sasa Minic; Srdjan Milosavljevic

2011-07-01T23:59:59.000Z

51

A Dynamic Wind Turbine Simulator of the Wind Turbine Generator System  

Science Conference Proceedings (OSTI)

To study dynamic performances of wind turbine generator system (WTGS), and to determine the control structures in laboratory. The dynamic torque generated by wind turbine (WT) must be simulated. In there paper, a dynamic wind turbine emulator (WTE) is ... Keywords: dynamic wind turbine emulation, wind shear, tower shadow, torque compensation

Lei Lu; Zhen Xie; Xing Zhang; Shuying Yang; Renxian Cao

2012-01-01T23:59:59.000Z

52

Extreme learning machine based wind speed estimation and sensorless control for wind turbine power generation system  

Science Conference Proceedings (OSTI)

This paper proposes a precise real-time wind speed estimation method and sensorless control for variable-speed variable-pitch wind turbine power generation system (WTPGS). The wind speed estimation is realized by a nonlinear input-output mapping extreme ... Keywords: Extreme learning machine, Sensorless control, Wind speed estimation, Wind turbine power generation system

Si Wu; Youyi Wang; Shijie Cheng

2013-02-01T23:59:59.000Z

53

Estimators for the Standard Deviation of Horizontal Wind Direction  

Science Conference Proceedings (OSTI)

The standard deviation of horizontal wind direction is a central quantity in the description of atmospheric turbulence and of great practical use in dispersion models. As horizontal wind direction is a circular variable, its standard deviation ...

Rudolf O. Weber

1997-10-01T23:59:59.000Z

54

Matrix converter technology in doubly-fed induction generators for wind generators.  

E-Print Network (OSTI)

??Wind generator technologies have been widely researched and documented. Modern wind generator systems are now being implemented with an output power of up to 5 (more)

Harris, Benjamin J

2009-01-01T23:59:59.000Z

55

Wind turbine generators having wind assisted cooling systems and cooling methods  

DOE Patents (OSTI)

A wind generator includes: a nacelle; a hub carried by the nacelle and including at least a pair of wind turbine blades; and an electricity producing generator including a stator and a rotor carried by the nacelle. The rotor is connected to the hub and rotatable in response to wind acting on the blades to rotate the rotor relative to the stator to generate electricity. A cooling system is carried by the nacelle and includes at least one ambient air inlet port opening through a surface of the nacelle downstream of the hub and blades, and a duct for flowing air from the inlet port in a generally upstream direction toward the hub and in cooling relation to the stator.

Bagepalli, Bharat (Niskayuna, NY); Barnes, Gary R. (Delanson, NY); Gadre, Aniruddha D. (Rexford, NY); Jansen, Patrick L. (Scotia, NY); Bouchard, Jr., Charles G. (Schenectady, NY); Jarczynski, Emil D. (Scotia, NY); Garg, Jivtesh (Cambridge, MA)

2008-09-23T23:59:59.000Z

56

A Method for Estimating the Standard Deviation of Wind Directions  

Science Conference Proceedings (OSTI)

A method for estimating the standard deviation of horizontal wind directions (??), from the cosines and sines of direction angles, is proposed.

K. A. Verrall; R. L. Williams

1982-12-01T23:59:59.000Z

57

Design and Test of a Variable Speed Wind Turbine System Employing a Direct Drive Axial Flux Synchronization Generator: 29 October 2002 - 31 December 2005  

SciTech Connect

The goal of this funded research project is the definition, analytical investigation, modeling, and prototype realization of a current-source conversion topology tailored to high-power wind turbines.

Lipo, T. A.; Tenca, P.

2006-07-01T23:59:59.000Z

58

Extreme Wind Speeds: Publications  

Science Conference Proceedings (OSTI)

... "Algorithms for Generating Large Sets of Synthetic Directional Wind Speed Data for Hurricane, Thunderstorm, and Synoptic Winds," NIST Technical ...

2013-08-19T23:59:59.000Z

59

Zhejiang Windey Wind Generating Engineering | Open Energy Information  

Open Energy Info (EERE)

Windey Wind Generating Engineering Windey Wind Generating Engineering Jump to: navigation, search Name Zhejiang Windey Wind Generating Engineering Place Zhejiang Province, China Zip 313200 Sector Wind energy Product Engaged in the marketing, technical development of wind turbines, quality control, assembly and after sales service. References Zhejiang Windey Wind Generating Engineering[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Zhejiang Windey Wind Generating Engineering is a company located in Zhejiang Province, China . References ↑ "Zhejiang Windey Wind Generating Engineering" Retrieved from "http://en.openei.org/w/index.php?title=Zhejiang_Windey_Wind_Generating_Engineering&oldid=353509"

60

SASS Wind Ambiguity Removal by Direct Minimization  

Science Conference Proceedings (OSTI)

A gridded surface wind analysis is obtained by minimizing an objective function, the magnitude of which measures the error made by the gridded analysis in fitting the SASS wind data, the conventional surface wind observations and the forecast ...

Ross N. Hoffman

1982-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "direct wind generator" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Operation of a third generation wind turbine  

SciTech Connect

A modern wind turbine was installed on May 26, 1982, at the USDA Conservation and Production Research Laboratory, Bushland, Texas. This wind machine was used to provide electrical energy for irrigation pumping and other agricultural loads. The wind turbine purchased for this research is an Enertech Model 44, manufactured by Enertech Corporation, Norwich, Vermont. The horizontal-axis wind turbine has a 13.4 m diameter, three-bladed, fixed-pitch rotor on a 24.4-m tower. The blades are laminated epoxy-wood, and are attached to a steel hub. A 25-kW induction generator provides 240 V, 60 Hz, single-phase electrical power. The wind turbine operated 64 percent of the time, while being available to operate over 94 percent of the time. The unit had a net energy production of over 80,000 kWh in an average windspeed of 5.9 m/s at a height of 10 m in a 16-month period. The blade pitch was originally offset two degrees from design to maintain power production within the limitations of the gearbox, generator, and brakes. A maximum output of 23.2 kW averaged over a 15-second period indicated that with a new brake, the system was capable of handling more power. After a new brake was installed, the blade pitch was changed to one degree from design. The maximum power output measured after the pitch change was 29.3 kW. Modified blade tip brakes were installed on the wind turbine on July 7, 1983. These tip brakes increased power production at lower windspeeds while reducing power at higher windspeeds.

Vosper, F.C.; Clark, R.N.

1983-12-01T23:59:59.000Z

62

1. Wind-splash erosion 4. Relationships between rainfall intensity, wind-speed, wind direction and erosion  

E-Print Network (OSTI)

1. Wind-splash erosion 4. Relationships between rainfall intensity, wind-speed, wind direction and erosion 5. Longer term influence of wind-direction on landscape evolution 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1 of tubes at approximately two week intervals. Contour plots of rainfall intensity (mm/hr) against wind

63

Numerical Simulations of Shelterbelt Effects on Wind Direction  

Science Conference Proceedings (OSTI)

A neutral boundary layer nonhydrostatic numerical model is used to determine the characteristics of shelterbelt effects on mean wind direction and to study the processing causing wind rotation when air passes through a shelterbelt. The model uses ...

Hao Wang; Eugene S. Takle

1995-10-01T23:59:59.000Z

64

Methods and apparatus for cooling wind turbine generators  

DOE Patents (OSTI)

A wind turbine generator includes a stator having a core and a plurality of stator windings circumferentially spaced about a generator longitudinal axis. A rotor is rotatable about the generator longitudinal axis, and the rotor includes a plurality of magnetic elements coupled to the rotor and cooperating with the stator windings. The magnetic elements are configured to generate a magnetic field and the stator windings are configured to interact with the magnetic field to generate a voltage in the stator windings. A heat pipe assembly thermally engaging one of the stator and the rotor to dissipate heat generated in the stator or rotor.

Salamah, Samir A. (Niskayuna, NY); Gadre, Aniruddha Dattatraya (Rexford, NY); Garg, Jivtesh (Schenectady, NY); Bagepalli, Bharat Sampathkumaran (Niskayuna, NY); Jansen, Patrick Lee (Alplaus, NY); Carl, Jr., Ralph James (Clifton Park, NY)

2008-10-28T23:59:59.000Z

65

Optimal control in energy conversion of small wind power systems with permanent-magnet-synchronous-generators  

Science Conference Proceedings (OSTI)

This paper presents the results of experimental investigation of a low-power wind energy conversion system (WECS), based on a permanent-magnet synchronous generator (PMSG) connected directly to the turbine. A development system was built in order to ... Keywords: hardware-in-the-loop simulation, maximum power point tracking, optimal control, permanent-magnet synchronous generator, wind system

C. Vlad; I. Munteanu; A. I. Bratcu; E. Ceanga

2008-07-01T23:59:59.000Z

66

Candidate wind turbine generator site: annual data summary, January 1981-December 1981  

DOE Green Energy (OSTI)

Summarized hourly meteorological data for 34 candidate and wind turbine generator sites for calendar year 1981 are presented. These data are collected for the purpose of evaluating the wind energy potential at these sites and are used to assist in selection of potential sites for installation and testing of large wind turbines in electric utility systems. For each site, wind speed, direction, and distribution data are given in eight tables. Use of information from these tables, with information about specific wind turbines, should allow the user to estimate the potential for wind energy production at each site.

Sandusky, W.F.; Buck, J.W.; Renne, D.S.; Hadley, D.L.; Abbey, O.B.

1982-07-01T23:59:59.000Z

67

Power System Modeling of 20percent Wind-Generated Electricity by 2030  

E-Print Network (OSTI)

Contribution to U.S. Electricity Supply. National Renewable20% of the nation's electricity from wind technology byTERMS wind-generated electricity; wind energy; 20% wind

Hand, Maureen

2008-01-01T23:59:59.000Z

68

Effects of Temporal Wind Patterns on the Value of Wind-Generated Electricity in California and the Northwest  

E-Print Network (OSTI)

approach to locating wind farms in the UK," RenewableV. G. Rau, "Optimum siting of wind turbine generators," IEEEoptimal planning for wind energy conver- sion systems over

Wiser, Ryan H

2008-01-01T23:59:59.000Z

69

A Technique for Deducing Wind Direction from Satellite Microwave Measurements of Wind Speed  

Science Conference Proceedings (OSTI)

A technique is presented to deduce wind direction from satellite microwave measurements of wind speed information. The technique, based on simple Ekman boundary layer dynamics, makes use of surface pressure fields routinely analyzed at the ...

Tsann-wang Yu

1987-09-01T23:59:59.000Z

70

Student Competition Prepares the Next Generation of Wind Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Student Competition Prepares the Next Generation of Wind Energy Student Competition Prepares the Next Generation of Wind Energy Entrepreneurs Student Competition Prepares the Next Generation of Wind Energy Entrepreneurs April 11, 2013 - 11:32am Addthis The Collegiate Wind Competition is one of several Energy Department-supported programs aiming to inspire the next generation of clean energy leaders. Here, JMU student Greg Miller demonstrates how the blades of a wind turbine work as part the Wind for Schools project. | Photo courtesy of the Virginia Center for Wind Energy. The Collegiate Wind Competition is one of several Energy Department-supported programs aiming to inspire the next generation of clean energy leaders. Here, JMU student Greg Miller demonstrates how the

71

Student Competition Prepares the Next Generation of Wind Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Competition Prepares the Next Generation of Wind Energy Competition Prepares the Next Generation of Wind Energy Entrepreneurs Student Competition Prepares the Next Generation of Wind Energy Entrepreneurs April 11, 2013 - 11:32am Addthis The Collegiate Wind Competition is one of several Energy Department-supported programs aiming to inspire the next generation of clean energy leaders. Here, JMU student Greg Miller demonstrates how the blades of a wind turbine work as part the Wind for Schools project. | Photo courtesy of the Virginia Center for Wind Energy. The Collegiate Wind Competition is one of several Energy Department-supported programs aiming to inspire the next generation of clean energy leaders. Here, JMU student Greg Miller demonstrates how the

72

Analysis of Wind Generation System by Real-Time Simulation  

Science Conference Proceedings (OSTI)

Due to the demand of green energy, the number of wind turbines installed has been increased drastically worldwide. Comparing with the traditional utility generation systems, the dynamic characteristic and response of wind farms are totally different. ... Keywords: Doubly-fed induction generator, real-time simulation, PC cluster-based real-time simulator, wind farm

H. C. Su; G. W. Chang; H. M. Huang; K. K. Jen; G. C. Chung; G. Z. Wu

2012-06-01T23:59:59.000Z

73

Dynamic simulation of dual-speed wind turbine generation  

SciTech Connect

Induction generators have been used since the early development of utility-scale wind turbine generation. An induction generator is the generator of choice because of its ruggedness, and low cost. With an induction generator, the operating speed of the wind turbine is limited to a narrow range (almost constant speed). Dual- speed operation can be accomplished by using an induction generator with two different sets of winding configurations or by using two induction generators with two different rated speeds. With single- speed operation, the wind turbine operates at different power coefficients (Cp) as the wind speed varies. The operation at maximum Cp can occur only at a single wind speed. However, if the wind speed varies across a wider range, the operating Cp will vary significantly. Dual-speed operation has the advantage of enabling the wind turbine to operate at near maximum Cp over a wider range of wind-speeds. Thus, annual energy production can be increased. The dual-speed mode may generate less energy than a variable-speed mode; nevertheless, it offers an alternative to capture more energy than single-speed operation. In this paper, dual-speed operation of a wind turbine will be investigated. One type of control algorithm for dual- speed operation is proposed. Results from a dynamic simulation will be presented to show how the control algorithm works and how power, current and torque of the system vary as the wind turbine is exposed to varying wind speeds.

Muljadi, E.; Butterfield, C.P.

1996-10-01T23:59:59.000Z

74

Wind Energy in Indian Country: Turning to Wind for the Seventh Generation  

E-Print Network (OSTI)

Wind Energy in Indian Country: Turning to Wind for the Seventh Generation by Andrew D. Mills: ___________________________________________ Jane Stahlhut Date #12;Wind Energy in Indian Country A.D. Mills Abstract - ii - Abstract Utility for the purpose of economic development. The aim of this project is to show how wind energy projects on tribal

Kammen, Daniel M.

75

Preliminary design and viability consideration of external, shroud-based stators in wind turbine generators  

E-Print Network (OSTI)

Horizontal-axis wind turbine designs often included gearboxes or large direct-drive generators to compensate for the low peripheral speeds of the turbine hub. To take advantage of high blade tip speeds, an alternative ...

Shoemaker-Trejo, Nathaniel (Nathaniel Joseph)

2012-01-01T23:59:59.000Z

76

Wind Turbine Generator System Acoustic Noise Test Report for the Gaia Wind 11-kW Wind Turbine  

DOE Green Energy (OSTI)

This report details the acoustic noise test conducted on the Gaia-Wind 11-kW wind turbine at the National Wind Technology Center. The test turbine is a two- bladed, downwind wind turbine with a rated power of 11 kW. The test turbine was tested in accordance with the International Electrotechnical Commission standard, IEC 61400-11 Ed 2.1 2006-11 Wind Turbine Generator Systems -- Part 11 Acoustic Noise Measurement Techniques.

Huskey, A.

2011-11-01T23:59:59.000Z

77

Axial-flux modular permanent-magnet generator with a toroidal winding for wind-turbine applications  

SciTech Connect

Permanent-magnet (PM) generators have been used for wind turbines for many years. Many small wind-turbine manufacturers use direct-drive PM generators. For wind-turbine generators, the design philosophy must cover the following characteristics: low cost, light weight, low speed, high torque, and variable-speed generation. The generator is easy to manufacture and the design can be scaled up for a larger size without major retooling. A modular PM generator with axial flux direction was chosen. The permanent magnet used is NdFeB or ferrite magnet with flux guide to focus flux density in the air gap. Each unit module of the generator may consist of one, two, or more phases. Each generator can be expanded to two or more unit modules. Each unit module is built from simple modular poles. The stator winding is formed like a torus. Thus, the assembly process is simplified and the winding insertion in the slot is less tedious. The authors built a prototype of one unit module and performed preliminary tests in the laboratory. Follow-up tests will be conducted in the laboratory to improve the design.

Muljadi, E.; Butterfield, C.P.; Wan, Y.H.

1999-08-01T23:59:59.000Z

78

Wind shear climatology for large wind turbine generators  

DOE Green Energy (OSTI)

Climatological wind shear analyses relevant to the design and operation of multimegawatt wind turbines are provided. Insight is provided for relating the wind experienced by a rotating blade in a shear flow to the analysis results. A simple analysis of the wind experienced by a rotating blade for three types of wind shear profiles under steady-state conditions is presented in graphical form. Comparisons of the magnitude and frequency of the variations in 1) the wind sensed by a single blade element, 2) the sum, and 3) the difference of the winds sensed by opposite blade elements show strong sensitivity to profile shape. These three items represent forcing functions that can be related to 1) flatwise bending moment, 2) torque on the shaft, and 3) teeter angle. A computer model was constructed to simulate rotational sampling of 10-s sampled winds from a tall tower for three different types of large wind turbines. Time series produced by the model indicated that the forcing functions on a rotating blade vary according to the shear profile encountered during each revolution as opposed to a profile derived from average wind conditions, e.g., hourly average winds. An analysis scheme was developed to establish a climatology of wind shear profiles derived from 10-s sampled winds and hourly average winds measured over a one-year period at several levels on a tall tower. Because of the sensitivity of the forcing function variability to profile shape, the analyses performed and presented are in the form of joint frequency distributions of velocity differences of the the top-to-hub versus the hub-to-bottom portion of disks of rotation for the three turbine configurations.

Elliott, D.L.; Wendell, L.L.; Heflick, S.K.

1982-10-01T23:59:59.000Z

79

Echo-state-network-based real-time wind speed estimation for wind power generation  

Science Conference Proceedings (OSTI)

Wind turbine generators (WTGs) are usually equipped with one or more well-calibrated anemometers to measure wind speed for system monitoring, control, and protection. The use of these mechanical sensors increases the cost and hardware complexity and ...

Wei Qiao

2009-06-01T23:59:59.000Z

80

Effects of Long Waves on Wind-Generated Waves  

Science Conference Proceedings (OSTI)

A model is developed to explain the observation made in several laboratory experiments that short wind-generated waves are suppressed by a train of long, mechanically generated waves. A sheltering mechanism is responsible for generation of the ...

Gang Chen; Stephen E. Belcher

2000-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "direct wind generator" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

The effects of energy storage properties and forecast accuracy on mitigating variability in wind power generation  

E-Print Network (OSTI)

Electricity generation from wind power is increasing worldwide. Wind power can offset traditional fossil fuel generators which is beneficial to the environment. However, wind generation is unpredictable. Wind speeds have ...

Jaworsky, Christina A

2013-01-01T23:59:59.000Z

82

Analysis of Temporal and Spatial Characteristics on Output of Wind Farms with Doubly Fed Induction Generator Wind Turbines  

Science Conference Proceedings (OSTI)

Due to the large number of wind turbines and covering too large area in a large wind farm, wake effects among wind turbines and wind speed time delays will have a greater impact of wind farms models. Taking wind farms with doubly fed induction generator(DFIG) ... Keywords: wind farm, modeling, temporal and spatial characteristics, DFIG, output characteristics

Shupo Bu, Xunwen Su

2012-12-01T23:59:59.000Z

83

Tax Exemption for Wind Energy Generation | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Tax Exemption for Wind Energy Generation Tax Exemption for Wind Energy Generation Tax Exemption for Wind Energy Generation < Back Eligibility Utility Savings Category Wind Buying & Making Electricity Program Info Start Date 7/2001 State West Virginia Program Type Corporate Exemption Rebate Amount Reduction of Business and Occupations (BandO) tax from 40% to 12% of generating capacity Provider West Virginia Division of Energy In March 2007, West Virginia enacted legislation ([http://www.legis.state.wv.us/Bill_Text_HTML/2007_SESSIONS/RS/BILLS/sb441... SB 441]) amending its tax law concerning the business and operation (B&O) tax for wind turbines. Although SB 441 increased the taxable value of wind turbine generating capacity, the taxation level is still significantly lower than that of most other types of electricity generation. For most

84

California Regional Wind Energy Forecasting System Development, Volume 4: California Wind Generation Research Dataset (CARD)  

Science Conference Proceedings (OSTI)

The rated capacity of wind generation in California is expected to grow rapidly in the future beyond the approximately 2100 megawatts in place at the end of 2005. The main drivers are the state's 20 percent renewable portfolio standard requirement in 2010 and the low cost of wind energy relative to other renewable energy sources. As wind is an intermittent generation resource and weather changes can cause large and rapid changes in output, system operators will need accurate and robust wind energy forec...

2006-11-13T23:59:59.000Z

85

Alternative methods of modeling wind generation using production costing models  

DOE Green Energy (OSTI)

This paper examines the methods of incorporating wind generation in two production costing models: one is a load duration curve (LDC) based model and the other is a chronological-based model. These two models were used to evaluate the impacts of wind generation on two utility systems using actual collected wind data at two locations with high potential for wind generation. The results are sensitive to the selected wind data and the level of benefits of wind generation is sensitive to the load forecast. The total production cost over a year obtained by the chronological approach does not differ significantly from that of the LDC approach, though the chronological commitment of units is more realistic and more accurate. Chronological models provide the capability of answering important questions about wind resources which are difficult or impossible to address with LDC models.

Milligan, M.R. [National Renewable Energy Lab., Golden, CO (United States); Pang, C.K. [P Plus Corp., Cupertino, CA (United States)

1996-08-01T23:59:59.000Z

86

Wind turbine generators having wind assisted cooling systems ...  

Geothermal; Hydrogen and Fuel Cell; Hydropower, Wave and Tidal; Industrial Technologies; Solar Photovoltaic; Solar Thermal; Startup America; Vehicles and Fuels; Wind ...

87

Reliability Assessment of Power Systems with Wind Power Generation.  

E-Print Network (OSTI)

??Wind power generation, the most promising renewable energy, is increasingly attractive to power industry and the whole society and becomes more significant in the portfolio (more)

Wang, Shu

2008-01-01T23:59:59.000Z

88

Changes related to "Zhejiang Windey Wind Generating Engineering...  

Open Energy Info (EERE)

"http:en.openei.orgwikiSpecial:RecentChangesLinkedZhejiangWindeyWindGeneratingEngineering" Atom Special pages About us Disclaimers Energy blogs Developer services...

89

Pages that link to "Zhejiang Windey Wind Generating Engineering...  

Open Energy Info (EERE)

from "http:en.openei.orgwikiSpecial:WhatLinksHereZhejiangWindeyWindGeneratingEngineering" Special pages About us Disclaimers Energy blogs Developer services OpenEI...

90

ARE660 Wind Generator: Low Wind Speed Technology for Small Turbine Development  

DOE Green Energy (OSTI)

This project is for the design of a wind turbine that can generate most or all of the net energy required for homes and small businesses in moderately windy areas. The purpose is to expand the current market for residential wind generators by providing cost effective power in a lower wind regime than current technology has made available, as well as reduce noise and improve reliability and safety. Robert W. Preus experience designing and/or maintaining residential wind generators of many configurations helped identify the need for an improved experience of safety for the consumer. Current small wind products have unreliable or no method of stopping the wind generator in fault or high wind conditions. Consumers and their neighbors do not want to hear their wind generators. In addition, with current technology, only sites with unusually high wind speeds provide payback times that are acceptable for the on-grid user. Abundant Renewable Energys (ARE) basic original concept for the ARE660 was a combination of a stall controlled variable speed small wind generator and automatic fail safe furling for shutdown. The stall control for a small wind generator is not novel, but has not been developed for a variable speed application with a permanent magnet alternator (PMA). The fail safe furling approach for shutdown has not been used to our knowledge.

Robert W. Preus; DOE Project Officer - Keith Bennett

2008-04-23T23:59:59.000Z

91

Direct drive wind turbine - Energy Innovation Portal  

A wind turbine is provided that minimizes the size of the drive train and nacelle while maintaining the power electronics and transformer at the top of the tower. The ...

92

Anemometer Data (Wind Speed, Direction) for Laurel, Nebraska (2001 - 2002)  

Open Energy Info (EERE)

Laurel, Nebraska (2001 - 2002) Laurel, Nebraska (2001 - 2002) Dataset Summary Description Wind data collected from Laurel, Nebraska from a 20-meter anemometer as part of the Western Area Power Administration anemometer loan program. Ten-minute average wind speed and direction is available for 2001 - 2002. The data was originally made available by Wind Powering America, a DOE Office of Energy Efficiency & Renewable Energy (EERE) program. A dynamic map displaying all available data from DOE anemometer loan programs is available http://www.windpoweringamerica.gov/anemometerloans/projects.asp. Source EERE Date Released November 09th, 2010 (4 years ago) Date Updated November 09th, 2010 (4 years ago) Keywords wind wind direction wind speed Data text/csv icon Jun 11, 2001 - Jul 1, 2001 (csv, 144 KiB)

93

National-Scale Wind Resource Assessment for Power Generation (Presentation)  

SciTech Connect

This presentation describes the current standards for conducting a national-scale wind resource assessment for power generation, along with the risk/benefit considerations to be considered when beginning a wind resource assessment. The presentation describes changes in turbine technology and viable wind deployment due to more modern turbine technology and taller towers and shows how the Philippines national wind resource assessment evolved over time to reflect changes that arise from updated technologies and taller towers.

Baring-Gould, E. I.

2013-08-01T23:59:59.000Z

94

Wind turbine power generation emulation via doubly fed induction generator control .  

E-Print Network (OSTI)

??In this thesis, we emulate a Wind Turbine Generator by driving a Doubly Fed Induction Generator (DFIG) via a DC motor with variable input torque (more)

Edwards, Gregory W.

2009-01-01T23:59:59.000Z

95

Application Filing Requirements for Wind-Powered Electric Generation  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Application Filing Requirements for Wind-Powered Electric Application Filing Requirements for Wind-Powered Electric Generation Facilities (Ohio) Application Filing Requirements for Wind-Powered Electric Generation Facilities (Ohio) < Back Eligibility Commercial Developer Utility Investor-Owned Utility Municipal/Public Utility Rural Electric Cooperative Savings Category Wind Buying & Making Electricity Program Info State Ohio Program Type Siting and Permitting Provider Ohio Power Siting Board Chapter 4906-17 of the Ohio Administrative Code states the Application Filing Requirements for wind-powered electric generating facilities in Ohio. The information requested in this rule shall be used to assess the environmental effects of the proposed facility. An applicant for a certificate to site a wind-powered electric generation

96

Loranger Power Generation Wind Farm | Open Energy Information  

Open Energy Info (EERE)

Loranger Power Generation Wind Farm Loranger Power Generation Wind Farm Jump to: navigation, search Name Loranger Power Generation Wind Farm Facility Loranger Power Generation Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner Loranger Power Generation Developer Loranger Power Generation Location Berlin NH Coordinates 44.501183°, -71.231588° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":44.501183,"lon":-71.231588,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

97

Wind Turbine Generator System Safety and Function Test Report for the Entegrity EW50 Wind Turbine  

DOE Green Energy (OSTI)

This report summarizes the results of a safety and function test that NREL conducted on the Entegrity EW50 wind turbine. This test was conducted in accordance with the International Electrotechnical Commissions' (IEC) standard, Wind Turbine Generator System Part 2: Design requirements for small wind turbines, IEC 61400-2 Ed.2.0, 2006-03.

Smith, J.; Huskey, A.; Jager, D.; Hur, J.

2012-11-01T23:59:59.000Z

98

Wind Turbine Generator System Safety and Function Test Report for the Ventera VT10 Wind Turbine  

DOE Green Energy (OSTI)

This report summarizes the results of a safety and function test that NREL conducted on the Ventera VT10 wind turbine. This test was conducted in accordance with the International Electrotechnical Commissions' (IEC) standard, Wind Turbine Generator System Part 2: Design requirements for small wind turbines, IEC 61400-2 Ed.2.0, 2006-03.

Smith, J.; Huskey, A.; Jager, D.; Hur, J.

2012-11-01T23:59:59.000Z

99

Analyzing the Effects of Temporal Wind Patterns on the Value of Wind-Generated Electricity at Different Sites in California and the Northwest  

E-Print Network (OSTI)

Energy Facilities. American Wind Energy Association (AWEA)Analyzing the Effects of Temporal Wind Patterns onthe Value of Wind-Generated Electricity References TrueWind

Fripp, Matthias; Wiser, Ryan

2006-01-01T23:59:59.000Z

100

Property:PotentialOffshoreWindGeneration | Open Energy Information  

Open Energy Info (EERE)

PotentialOffshoreWindGeneration PotentialOffshoreWindGeneration Jump to: navigation, search Property Name PotentialOffshoreWindGeneration Property Type Quantity Description The estimated potential energy generation from Offshore Wind for a particular place. Use this type to express a quantity of energy. The default unit for energy on OpenEI is the Kilowatt hour (kWh), which is 3,600,000 Joules. http://en.wikipedia.org/wiki/Unit_of_energy It's possible types are Watt hours - 1000 Wh, Watt hour, Watthour Kilowatt hours - 1 kWh, Kilowatt hour, Kilowatthour Megawatt hours - 0.001 MWh, Megawatt hour, Megawatthour Gigawatt hours - 0.000001 GWh, Gigawatt hour, Gigawatthour Joules - 3600000 J, Joules, joules Pages using the property "PotentialOffshoreWindGeneration" Showing 25 pages using this property. (previous 25) (next 25)

Note: This page contains sample records for the topic "direct wind generator" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Anemometer Data (Wind Speed, Direction) for Ugashik, AK (2001 - 2002) |  

Open Energy Info (EERE)

0 0 Varnish cache server Browse Upload data GDR 429 Throttled (bot load) Error 429 Throttled (bot load) Throttled (bot load) Guru Meditation: XID: 2142278290 Varnish cache server Anemometer Data (Wind Speed, Direction) for Ugashik, AK (2001 - 2002) Dataset Summary Description Wind data collected from Ugashik Traditional Village in Alaska from an anemometer as part of the Native American anemometer loan program. Monthly mean wind speed is available for 2001 through 2002, as is wind direction and turbulence data. Data is reported from a height of 20 m. The data was originally made available by Wind Powering America, a DOE Office of Energy Efficiency & Renewable Energy (EERE) program. A dynamic map displaying all available data from DOE anemometer loan programs is available http://www.windpoweringamerica.gov/anemometerloans/projects.asp.

102

Anemometer Data (Wind Speed, Direction) for Tanana, AK (2001 - 2002) |  

Open Energy Info (EERE)

40 40 Varnish cache server Anemometer Data (Wind Speed, Direction) for Tanana, AK (2001 - 2002) Dataset Summary Description Wind data collected from Tanana Village in Alaska from an anemometer as part of the Native American anemometer loan program. Monthly mean wind speed is available for 2001 through 2002, as is wind direction and turbulence data. Data is reported from a height of 20 m. The data was originally made available by Wind Powering America, a DOE Office of Energy Efficiency & Renewable Energy (EERE) program. A dynamic map displaying all available data from DOE anemometer loan programs is available http://www.windpoweringamerica.gov/anemometerloans/projects.asp. Source EERE Date Released November 09th, 2010 (4 years ago) Date Updated November 09th, 2010 (4 years ago)

103

Power System Modeling of 20percent Wind-Generated Electricity by 2030  

E-Print Network (OSTI)

the relationship between wind power class and cost is showncosts associated with wind power. The cost implications ofprice electricity, wind power directly reduces exposure to

Hand, Maureen

2008-01-01T23:59:59.000Z

104

Coupling Wind Generators with Deferrable Loads  

NLE Websites -- All DOE Office Websites (Extended Search)

existing deregulated power markets and demand side flexibility could support large scale integration of wind power without significant impacts on grid operations and without the...

105

Property:PotentialOnshoreWindGeneration | Open Energy Information  

Open Energy Info (EERE)

PotentialOnshoreWindGeneration PotentialOnshoreWindGeneration Jump to: navigation, search Property Name PotentialOnshoreWindGeneration Property Type Quantity Description The area of potential onshore wind in a place. Use this type to express a quantity of energy. The default unit for energy on OpenEI is the Kilowatt hour (kWh), which is 3,600,000 Joules. http://en.wikipedia.org/wiki/Unit_of_energy It's possible types are Watt hours - 1000 Wh, Watt hour, Watthour Kilowatt hours - 1 kWh, Kilowatt hour, Kilowatthour Megawatt hours - 0.001 MWh, Megawatt hour, Megawatthour Gigawatt hours - 0.000001 GWh, Gigawatt hour, Gigawatthour Joules - 3600000 J, Joules, joules Pages using the property "PotentialOnshoreWindGeneration" Showing 25 pages using this property. (previous 25) (next 25)

106

Wind Turbine Generator System Power Performance Test Report for the ARE442 Wind Turbine  

DOE Green Energy (OSTI)

This report summarizes the results of a power performance test that NREL conducted on the ARE 442 wind turbine. This test was conducted in accordance with the International Electrotechnical Commission's (IEC) standard, Wind Turbine Generator Systems Part 12: Power Performance Measurements of Electricity Producing Wind Turbines, IEC 61400-12-1 Ed.1.0, 2005-12. However, because the ARE 442 is a small turbine as defined by IEC, NREL also followed Annex H that applies to small wind turbines. In these summary results, wind speed is normalized to sea-level air density.

van Dam, J.; Jager, D.

2010-02-01T23:59:59.000Z

107

Doubly-fed induction generator used in wind energy  

Science Conference Proceedings (OSTI)

Wound-rotor induction generator has numerous advantages in wind power generation over other generators. One scheme for wound-rotor induction generator is realized when a converter cascade is used between the slip-ring terminals and the utility grid to ...

Hany M. Jabr Soloumah

2008-01-01T23:59:59.000Z

108

Wind Generation on Winnebago Tribal Lands  

DOE Green Energy (OSTI)

The Winnebago Wind Energy Study evaluated facility-scale, community-scale and commercial-scale wind development on Winnebago Tribal lands in northeastern Nebraska. The Winnebago Tribe of Nebraska has been pursuing wind development in various forms for nearly ten years. Wind monitoring utilizing loaned met towers from NREL took place during two different periods. From April 2001 to April 2002, a 20-meter met tower monitored wind data at the WinnaVegas Casino on the far eastern edge of the Winnebago reservation in Iowa. In late 2006, a 50-meter tower was installed, and subsequently monitored wind data at the WinnaVegas site from late 2006 through late 2008. Significant challenges with the NREL wind monitoring equipment limited the availability of valid data, but based on the available data, average wind speeds between 13.6 14.3 miles were indicated, reflecting a 2+/3- wind class. Based on the anticipated cost of energy produced by a WinnaVegas wind turbine, and the utility policies and rates in place at this time, a WinnaVegas wind project did not appear to make economic sense. However, if substantial grant funding were available for energy equipment at the casino site, and if either Woodbury REC backup rates were lower, or NIPCO was willing to pay more for wind power, a WinnaVegas wind project could be feasible. With funding remaining in the DOE-funded project budget,a number of other possible wind project locations on the Winnebago reservation were considered. in early 2009, a NPPD-owned met tower was installed at a site identified in the study pursuant to a verbal agreement with NPPD which provided for power from any ultimately developed project on the Western Winnebago site to be sold to NPPD. Results from the first seven months of wind monitoring at the Western Winnebago site were as expected at just over 7 meters per second at 50-meter tower height, reflecting Class 4 wind speeds, adequate for commercial development. If wind data collected in the remaining months of the twelve-month collection period is consistent with that collected in the first seven months, the Western Winnebago site may present an interesting opportunity for Winnebago. Given the distance to nearby substations, and high cost of interconnection at higher voltage transmission lines, Winnebago would likely need to be part of a larger project in order to reduce power costs to more attractive levels. Another alternative would be to pursue grant funding for a portion of development or equipment costs, which would also help reduce the cost of power produced. The NREL tower from the WinnaVegas site was taken down in late 2008, re-instrumented and installation attempted on the Thunderway site south of the Winnebago community. Based on projected wind speeds, current equipment costs, and the projects proximity to substations for possible interconnection, a Thunderway community-scale wind project could also be feasible.

Multiple

2009-09-30T23:59:59.000Z

109

Dynamic Simulation Studies of the Frequency Response of the Three U.S. Interconnections with Increased Wind Generation  

E-Print Network (OSTI)

2009. North America Dynamic Wind Generator Modeling Update,work performed by the WECC Wind Generator Modeling Group andIEEE Dynamic Performance of Wind Power Generation Working

Mackin, Peter

2011-01-01T23:59:59.000Z

110

Incorporating Wind Generation in Cap and Trade Programs  

DOE Green Energy (OSTI)

Cap and trade programs are increasingly being used to reduce emissions from electricity generation in the United States. Cap and trade programs primarily target emitting generators, but programs have also included renewable generators, such as wind generators. States cite several reasons why they have considered the policy option of including renewable generators in cap and trade programs: to provide an incentive for lower-emitting generation, to achieve emissions reductions in non-capped pollutants, and to gain local economic benefits associated with renewable energy projects. The U.S. Environmental Protection Agency also notes these rationales for considering this policy alternative, and the National Association of Regulatory Commissioners (NARUC) passed a resolution supporting the inclusion of renewable energy in cap and trade programs. This report explores why states consider this policy option, what participation could mean for wind generators, and how wind generation can most effectively be included in state, federal, and regional cap and trade programs.

Bluestein, J.; Salerno, E.; Bird, L.; Vimmerstedt, L.

2006-07-01T23:59:59.000Z

111

Qingdao Hengfeng Wind Power Generator Co Ltd | Open Energy Information  

Open Energy Info (EERE)

Qingdao Hengfeng Wind Power Generator Co Ltd Qingdao Hengfeng Wind Power Generator Co Ltd Jump to: navigation, search Name Qingdao Hengfeng Wind Power Generator Co Ltd Place Jiaonan, Shandong Province, China Sector Wind energy Product Shandong, Jiaonan-based wind turbine supplier. Coordinates 35.875°, 119.977203° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":35.875,"lon":119.977203,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

112

Incorporating Wind Generation in Cap and Trade Programs  

Wind Powering America (EERE)

Incorporating Wind Generation in Incorporating Wind Generation in Cap and Trade Programs Joel Bluestein Energy and Environmental Analysis, Inc. Elizabeth Salerno American Wind Energy Association Lori Bird and Laura Vimmerstedt National Renewable Energy Laboratory Technical Report NREL/TP-500-40006 July 2006 Incorporating Wind Generation in Cap and Trade Programs Joel Bluestein Energy and Environmental Analysis, Inc. Elizabeth Salerno American Wind Energy Association Lori Bird and Laura Vimmerstedt National Renewable Energy Laboratory Prepared under Task No. WER6 6006 Technical Report NREL/TP-500-4006 July 2006 National Renewable Energy Laboratory 1617 Cole Boulevard, Golden, Colorado 80401-3393 303-275-3000 * www.nrel.gov Operated for the U.S. Department of Energy Office of Energy Efficiency and Renewable Energy

113

A peak power tracker for low-power permanent-magnet-synchronous-generator-based wind energy conversion systems  

Science Conference Proceedings (OSTI)

This paper presents the results of experimental investigation of a low-power wind energy conversion system (WECS), based on a permanent-magnet synchronous generator (PMSG) connected directly to the turbine. A test rig was built in order to carry out ... Keywords: hardware-in-the-loop simulation, maximum power point tracking, optimal control, permanent-magnet synchronous generator, wind system

C. Vlad; I. Munteanu; A. I. Bratcu; E. Ceanga

2008-07-01T23:59:59.000Z

114

Effects of Temporal Wind Patterns on the Value of Wind-Generated Electricity in California and the Northwest  

E-Print Network (OSTI)

V. G. Rau, "Optimum siting of wind turbine generators," IEEEwould be expected from wind turbines at each site [1-6].the hub height of modern wind turbines. The modeled data for

Wiser, Ryan H

2008-01-01T23:59:59.000Z

115

Understanding the unbalanced-voltage problem in wind turbine generation  

DOE Green Energy (OSTI)

Most wind turbines are equipped with line-connected induction generators. Induction generators are very attractive as wind turbine generators due to their low cost, ruggedness and the need for little or no maintenance. At constant frequency, the induction generator operates in a small range of speeds and, therefore, it operated with a small range of slips with respect to synchronous speed. Compared to a synchronous generator, an induction generator provides lower stiffness, thus alleviating the mechanical stress. In a weak power system network, an unbalanced load at the distribution lines can cause unbalanced voltage conditions. If an induction generator is connected to an unbalanced voltage, the resulting stator current will be unbalanced. The unbalanced current creates unequal heating (hot spots) on the stator winding. The heat may increase the winding temperature, which degrades the insulation of the winding, i.e., the life expectancy of the winding. Unbalanced currents also create torque pulsation on the shaft resulting in audible noise and extra mechanical stress. This paper explores the unbalanced voltage problem in induction generators. The levels of unbalance and the loads are varied. Experimental and predicted results are presented in this paper.

Muljadi, E.; Butterfield, C.P.; Batan, T.; Yildirim, D.

2000-02-28T23:59:59.000Z

116

Wind Power Generation Dynamic Impacts on Electric Utility Systems  

Science Conference Proceedings (OSTI)

This technical planning study is an initial assessment of potential dynamic impacts on electric utility systems of wind power generation via large wind turbines. Three classes of dynamic problems-short-term transient stability, system frequency excursions, and minute-to-minute unit ramping limitations - were examined in case studies based on the Hawaiian Electric Co. System.

1980-11-01T23:59:59.000Z

117

Design of Wind Power Generator's Vane which Based on Computer  

Science Conference Proceedings (OSTI)

In this paper, we have mainly analyzed the relationship between virtual prototype and concurrent design. Then we have concluded the model of virtual prototype and simulation method which based on field object. We also have studied the design of wind ... Keywords: Vanes of wind power generator, Physical Prototype, Digital prototype, Virtual Prototype, Aerodynamics

Rui Chang; Yiming He

2011-03-01T23:59:59.000Z

118

Momentum and Energy Transfer in Wind Generation of Waves  

Science Conference Proceedings (OSTI)

Complete expressions for wind momentum and energy transfer to wind-generated waves are derived based on a boundary-layer integral method. The airflow and wave measurements as made by Wu et al. (1977, 1979) are used to provide a first-order ...

Chin-Tsau Hsu; Hong-Ye Wu; En-Yun Hsu; Robert L. Street

1982-09-01T23:59:59.000Z

119

Pages that link to "Ningxia Yinyi Wind Power Generation Co Ltd...  

Open Energy Info (EERE)

this page on Facebook icon Twitter icon Pages that link to "Ningxia Yinyi Wind Power Generation Co Ltd" Ningxia Yinyi Wind Power Generation Co Ltd Jump to:...

120

The role of hydroelectric generation in electric power systems with large scale wind generation.  

E-Print Network (OSTI)

??An increasing awareness of the operational challenges created by intermittent generation of electricity from policy-mandated renewable resources, such as wind and solar, has led to (more)

Hagerty, John Michael

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "direct wind generator" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

ERCOT's Dynamic Model of Wind Turbine Generators: Preprint  

DOE Green Energy (OSTI)

By the end of 2003, the total installed wind farm capacity in the Electric Reliability Council of Texas (ERCOT) system was approximately 1 gigawatt (GW) and the total in the United States was about 5 GW. As the number of wind turbines installed throughout the United States increases, there is a greater need for dynamic wind turbine generator models that can properly model entire power systems for different types of analysis. This paper describes the ERCOT dynamic models and simulations of a simple network with different types of wind turbine models currently available.

Muljadi, E.; Butterfield, C. P.; Conto, J.; Donoho, K.

2005-08-01T23:59:59.000Z

122

Axial Flux, Modular, Permanent-Magnet Generator with a Toroidal Winding for Wind Turbine Applications  

NLE Websites -- All DOE Office Websites (Extended Search)

CP-500-24996 Ÿ UC Category: 1213 CP-500-24996 Ÿ UC Category: 1213 Axial Flux, Modular, Permanent- Magnet Generator with a Toroidal Winding for Wind Turbine Applications E. Muljadi C.P. Butterfield Yih-Huei Wan National Wind Technology Center National Renewable Energy Laboratory Presented at IEEE Industry Applications Conference St. Louis, MO November 5-8, 1998 National Renewable Energy Laboratory 1617 Cole Boulevard

123

Floating offshore wind farms : demand planning & logistical challenges of electricity generation  

E-Print Network (OSTI)

Floating offshore wind farms are likely to become the next paradigm in electricity generation from wind energy mainly because of the near constant high wind speeds in an offshore environment as opposed to the erratic wind ...

Nnadili, Christopher Dozie, 1978-

2009-01-01T23:59:59.000Z

124

A simulation solution of the integration of wind power into an electricity generating network  

Science Conference Proceedings (OSTI)

To effectively harness the power of wind electricity generation, significant infrastructure challenges exist. First, the individual wind turbines must be sited and constructed as part of a wind farm. Second, the wind farm must be connected to the electricity ...

Thomas F. Brady

2009-12-01T23:59:59.000Z

125

Maximum power tracking control scheme for wind generator systems  

E-Print Network (OSTI)

The purpose of this work is to develop a maximum power tracking control strategy for variable speed wind turbine systems. Modern wind turbine control systems are slow, and they depend on the design parameters of the turbine and use wind and/or rotor speed measurements as control variable inputs. The dependence on the accuracy of the measurement devices makes the controller less reliable. The proposed control scheme is based on the stiff system concept and provides a fast response and a dynamic solution to the complicated aerodynamic system. This control scheme provides a response to the wind changes without the knowledge of wind speed and turbine parameters. The system consists of a permanent magnet synchronous machine (PMSM), a passive rectifier, a dc/dc boost converter, a current controlled voltage source inverter, and a microcontroller that commands the dc/dc converter to control the generator for maximum power extraction. The microcontroller will also be able to control the current output of the three-phase inverter. In this work, the aerodynamic characteristics of wind turbines and the power conversion system topology are explained. The maximum power tracking control algorithm with a variable step estimator is introduced and the modeling and simulation of the wind turbine generator system using the MATLAB/SIMULINK software is presented and its results show, at least in principle, that the maximum power tracking algorithm developed is suitable for wind turbine generation systems.

Mena Lopez, Hugo Eduardo

2007-12-01T23:59:59.000Z

126

Optimal power capturing of multi-MW wind generation system  

Science Conference Proceedings (OSTI)

Recently, an increasing number of multi-MW (1MW and up) wind generation systems are being developed and variable speed-variable pitch (VS-VP) control technology is usually adopted to improve the fast response speed and obtain the optimal energy, which ... Keywords: adaptive fuzzy proportional integral derivative, doubly-fed induction generator, hydraulic variable pitch mechanism, optimal, variable speed-variable pitch, wind turbine

Kong Yigang; Wang Zhixin

2008-03-01T23:59:59.000Z

127

Property Tax Exemption for Wind Energy Generation Facilities (Nebraska) |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Property Tax Exemption for Wind Energy Generation Facilities Property Tax Exemption for Wind Energy Generation Facilities (Nebraska) Property Tax Exemption for Wind Energy Generation Facilities (Nebraska) < Back Eligibility Commercial Fed. Government Local Government Municipal Utility Rural Electric Cooperative State Government Savings Category Wind Buying & Making Electricity Maximum Rebate 100% Program Info Start Date 04/12/2010 State Nebraska Program Type Property Tax Incentive Rebate Amount 100% of appreciable tangible personal property tax; payment in lieu of tax required Provider Nebraska State Office Building [http://nebraskalegislature.gov/FloorDocs/101/PDF/Slip/LB1048.pdf Nebraska Legislative Bill 1048 (LB1048)] created a nameplate capacity tax that replaced the Nebraska Department of Revenue's central assessment and

128

Grid-connected and control of MPPT for wind power generation systems based on the SCIG  

Science Conference Proceedings (OSTI)

This paper adopts a main circuit structure with back-to-back PWM converter, in which generator-side using direct torque control method, and grid-side adopts three-phase VSR inner current decoupling control based feed forward control algorithms, and this ... Keywords: back-to-back, grid-connected, maximum power point tracking (MPPT), squirrel cage induction generator (SCIG), wind-turbine generation system

Yidong Chen; Yulin Yang; Liqiao Wang; Zhiyun Jia; Weiyang Wu

2010-03-01T23:59:59.000Z

129

Maintenance and operation of a small wind generator in the marine environment. Final report  

SciTech Connect

This report discusses the maintenance and operation of a wind-turbine generator that has been undergoing tests as a source of energy for remote Coast Guard lighthouses. The report documents both the effects of operating the wind machine in the marine environment and the maintenance that it required. Design parameters and performance records of the generator are also evaluated. The HR2 is a horizontal-axis, upwind-oriented, three-bladed wind machine. It is equipped with a direct-drive system that allows the kinetic force captured by the propeller to be converted directly into rotational force driving the main shaft. The HR2 alternator and blade/hub system are allowed to tilt out of a near-vertical plane about a shaft and bearing mechanism. The VARCS is a torsion spring- and hinge-mechanism that acts against the lifting dynamics of the spinning blades. As high winds or gusts tilt the alternator about the hinge, the VARCS's spring opposes this force and regulates the blades angle of attack into the wind; the propeller's RPM drop when tilted because of the feathering action. If the wind subsides, the force of the VARCS spring drives the alternator assembly down and presents the blades back into the wind.

Heerlein, W.

1986-07-01T23:59:59.000Z

130

Wind turbine generator with improved operating subassemblies  

DOE Patents (OSTI)

A wind turbine includes a yaw spring return assembly to return the nacelle from a position to which it has been rotated by yawing forces, thus preventing excessive twisting of the power cables and control cables. It also includes negative coning restrainers to limit the bending of the flexible arms of the rotor towards the tower, and stop means on the rotor shaft to orient the blades in a vertical position during periods when the unit is upwind when the wind commences. A pendulum pitch control mechanism is improved by orienting the pivot axis for the pendulum arm at an angle to the longitudinal axis of its support arm, and excessive creep is of the synthetic resin flexible beam support for the blades is prevented by a restraining cable which limits the extent of pivoting of the pendulum during normal operation but which will permit further pivoting under abnormal conditions to cause the rotor to stall.

Cheney, Jr., Marvin C. (24 Stonepost Rd., Glastonbury, CT 06033)

1985-01-01T23:59:59.000Z

131

Wind Direction Meander at a Coastal Site during Onshore Flows  

Science Conference Proceedings (OSTI)

About 700 cases of wind direction meander occurred in a three-year period during onshore flow at a Long Island coastal site. Most appeared to be caused by internal gravity waves but some by roll vortices. Each case was documented with respect to ...

Gilbert S. Raynor; Janet V. Hayes

1984-06-01T23:59:59.000Z

132

Dynamic Analysis of a Grid-Connected Wind Electric Generator with Embedded Static VAR Compensator  

Science Conference Proceedings (OSTI)

This paper describes modeling and simulation of Wind Electric Generator (WEG) comprising a pitch controlled Horizontal Axis Wind Turbine (HAWT) coupled to squirrel cage induction generator through a gear. The generic issue of VAR drain from the grid ... Keywords: Wind turbine, induction generator, two mass model - drive train, SVC, wind electric generator dynamics

Vishnuvardhanan V.; Sasi K. Kottayil

2009-12-01T23:59:59.000Z

133

Property Tax Exemption for Wind Generators (Oklahoma)  

Energy.gov (U.S. Department of Energy (DOE))

The state of Oklahoma offers a five year ad valorem property tax exemption for certain windpower generators.

134

Doubly-fed induction generator torque in wind turbines  

Science Conference Proceedings (OSTI)

The field oriented doubly-fed induction generator (DFIG) is being increasingly used in variable speed wind turbines. It is therefore indispensable to become better acquainted with electrical and mechanical DFIG features in both stationary and dynamic ... Keywords: doubly-fed induction generator (DFIG), torque characteristic of DFIG

Jurica Smajo; Dinko Vukadinovic

2008-02-01T23:59:59.000Z

135

Millville Wind Turbine Generator: failure analysis and corrective design modification  

DOE Green Energy (OSTI)

Fatigue cracks in the blade skins of the Millville Wind Turbine Generator were fractographically analyzed. It is believed they were caused by large flapwise deflections during a wind storm on December 4, 1978. The deflections caused the skin to buckle, which initiated rapidly growing fatigue cracks. Propagation continued to the leading edge, moving radially inward and outward along the leading edge radius. Communication between Rockwell and Millville resulted in a modified blade design which incorporates several corrective techniques.

Waldon, C.A.; Carr, M.J.; Grotzky, V.K.

1979-07-01T23:59:59.000Z

136

Iowa Distributed Wind Generation Project | Open Energy Information  

Open Energy Info (EERE)

Generation Project Generation Project Jump to: navigation, search Name Iowa Distributed Wind Generation Project Facility Iowa Distributed Wind Generation Project Sector Wind energy Facility Type Community Wind Facility Status In Service Owner Consortium -- Cedar Falls leads with 2/3 ownership Developer Iowa Distributed Wind Generation Project Energy Purchaser Consortium -- Cedar Falls leads with 2/3 ownership Location Algona IA Coordinates 43.0691°, -94.2255° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":43.0691,"lon":-94.2255,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

137

Model Simulations Examining the Relationship of Lake-Effect Morphology to Lake Shape, Wind Direction, and Wind Speed  

Science Conference Proceedings (OSTI)

Idealized model simulations with an isolated elliptical lake and prescribed winter lake-effect environmental conditions were used to examine the influences of lake shape, wind speed, and wind direction on the mesoscale morphology. This study ...

Neil F. Laird; John E. Walsh; David A. R. Kristovich

2003-09-01T23:59:59.000Z

138

Nanjing Sunec Wind Generator Equipment Factory | Open Energy Information  

Open Energy Info (EERE)

Sunec Wind Generator Equipment Factory Sunec Wind Generator Equipment Factory Jump to: navigation, search Name Nanjing Sunec Wind Generator Equipment Factory Place Nanjing, Jiangsu Province, China Zip 211100 Sector Wind energy Product A Chinese manufacturer for power supply, grid automation equipment and small-to-medium wind turbines, as well as a wind project developer. Coordinates 32.0485°, 118.778969° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":32.0485,"lon":118.778969,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

139

Impact of wind generators on the stability of power system network  

Science Conference Proceedings (OSTI)

This paper investigates the impacts of wind generators on the transient stability of a small power system. Two types of wind generators are considered, a fixed speed and variable speed induction generators. The behavior of synchronous generator's rotor ... Keywords: distributed generators, fixed and variable speed wind generators, transient stability

K. A. Folly; K. Tjiuma

2007-05-01T23:59:59.000Z

140

Fourth Annual Progress Report on the Electrofluid Dynamic Wind Generator: Final Report for the Period 1 April 1979 - 31 August 1980  

SciTech Connect

Conventional wind energy systems are limited in wind turbine diameter by allowable rotor stresses at power levels of several megawatts. In contrast, the Electrofluid Dynamic (EFD) wind driven generator has no fundamental limits on cross sectional area. It is a direct energy conversion device which employs unipolar charged particles transported by the wind against a retarding voltage gradient to a high potential. As no moving parts are exposed to the wind, extremely large power units may be feasible.

Minardi, J. E.; Lawson, M. O.; Wattendorf, F. L.

1981-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "direct wind generator" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

The Estimation of Wind-Wave Generation in a Discrete Spectral Model  

Science Conference Proceedings (OSTI)

The estimation of wind-wave generation using a new discrete spectral model is compared to Hasselmann et al.'s (1976) parametric model and to models driven primarily by direct transfer of energy from the atmosphere into the surface waves. The main ...

Donald T. Resio

1981-04-01T23:59:59.000Z

142

Variable speed operation of generators with rotor-speed feedback in wind power applications  

SciTech Connect

The use of induction generators in wind power applications has been common since the early development of the wind industry. Most of these generators operate at fixed frequency and are connected directly to the utility grid. Unfortunately, this mode of operation limits the rotor speed to a specific rpm. Variable-speed operation is preferred in order to facilitate maximum energy capture over a wide range of wind speeds. This paper explores variable-speed operating strategies for wind turbine applications. The objectives are to maximize energy production, provide controlled start-up and reduce torque loading. This paper focuses on optimizing the energy captured by operating at maximum aerodynamic efficiency at any wind speed. The control strategy we analyze uses rotor speed and generator power as the feedback signals. In the normal operating region, rotor speed is used to compute a target power that corresponds to optimum operation. With power as the control objective, the power converter and generator are controlled to track the target power at any rpm. Thus, the torque-speed characteristic of the generator is shaped to optimize the energy capture. The target power is continuously updated at any rpm. in extreme areas of the operating envelope, during start-up, shutdown, generator overload, or overspeed, different strategies driven by other system considerations must be used.

Muljadi, E.; Butterfield, C.P.; Migliore, P.

1995-11-01T23:59:59.000Z

143

European Wind Energy Conference & Exhibition EWEC 2003, Madrid, Spain. Forecasting of Regional Wind Generation by a Dynamic  

E-Print Network (OSTI)

European Wind Energy Conference & Exhibition EWEC 2003, Madrid, Spain. Forecasting of Regional Wind forecasting. I. INTRODUCTION HE actual large-scale integration of wind energy in several European countries enhance the position of wind energy compared to other dispatchable forms of generation. Predicting

Paris-Sud XI, Université de

144

Variable speed wind turbine generator with zero-sequence filter  

DOE Patents (OSTI)

A variable speed wind turbine generator system to convert mechanical power into electrical power or energy and to recover the electrical power or energy in the form of three phase alternating current and return the power or energy to a utility or other load with single phase sinusoidal waveform at sixty (60) hertz and unity power factor includes an excitation controller for generating three phase commanded current, a generator, and a zero sequence filter. Each commanded current signal includes two components: a positive sequence variable frequency current signal to provide the balanced three phase excitation currents required in the stator windings of the generator to generate the rotating magnetic field needed to recover an optimum level of real power from the generator; and a zero frequency sixty (60) hertz current signal to allow the real power generated by the generator to be supplied to the utility. The positive sequence current signals are balanced three phase signals and are prevented from entering the utility by the zero sequence filter. The zero sequence current signals have zero phase displacement from each other and are prevented from entering the generator by the star connected stator windings. The zero sequence filter allows the zero sequence current signals to pass through to deliver power to the utility. 14 figs.

Muljadi, E.

1998-08-25T23:59:59.000Z

145

Variable Speed Wind Turbine Generator with Zero-sequence Filter  

DOE Patents (OSTI)

A variable speed wind turbine generator system to convert mechanical power into electrical power or energy and to recover the electrical power or energy in the form of three phase alternating current and return the power or energy to a utility or other load with single phase sinusoidal waveform at sixty (60) hertz and unity power factor includes an excitation controller for generating three phase commanded current, a generator, and a zero sequence filter. Each commanded current signal includes two components: a positive sequence variable frequency current signal to provide the balanced three phase excitation currents required in the stator windings of the generator to generate the rotating magnetic field needed to recover an optimum level of real power from the generator; and a zero frequency sixty (60) hertz current signal to allow the real power generated by the generator to be supplied to the utility. The positive sequence current signals are balanced three phase signals and are prevented from entering the utility by the zero sequence filter. The zero sequence current signals have zero phase displacement from each other and are prevented from entering the generator by the star connected stator windings. The zero sequence filter allows the zero sequence current signals to pass through to deliver power to the utility.

Muljadi, Eduard (Golden, CO)

1998-08-25T23:59:59.000Z

146

Variable speed wind turbine generator with zero-sequence filter  

DOE Patents (OSTI)

A variable speed wind turbine generator system to convert mechanical power into electrical power or energy and to recover the electrical power or energy in the form of three phase alternating current and return the power or energy to a utility or other load with single phase sinusoidal waveform at sixty (60) hertz and unity power factor includes an excitation controller for generating three phase commanded current, a generator, and a zero sequence filter. Each commanded current signal includes two components: a positive sequence variable frequency current signal to provide the balanced three phase excitation currents required in the stator windings of the generator to generate the rotating magnetic field needed to recover an optimum level of real power from the generator; and a zero frequency sixty (60) hertz current signal to allow the real power generated by the generator to be supplied to the utility. The positive sequence current signals are balanced three phase signals and are prevented from entering the utility by the zero sequence filter. The zero sequence current signals have zero phase displacement from each other and are prevented from entering the generator by the star connected stator windings. The zero sequence filter allows the zero sequence current signals to pass through to deliver power to the utility.

Muljadi, Eduard (Golden, CO)

1998-01-01T23:59:59.000Z

147

Analysis and Comparison of Low Voltage Ride Through Capability of Wind Power Generators.  

E-Print Network (OSTI)

??When the wind power accounted for a total generating capacity reaches a certain percentage, wind turbine's ability to maintain operation during a fault will affect (more)

Wu, Tung-Sheng

2013-01-01T23:59:59.000Z

148

Quantifying the system balancing cost when wind energy is incorporated into electricity generation system.  

E-Print Network (OSTI)

??Incorporation of wind energy into the electricity generation system requires a detailed analysis of wind speed in order to minimize system balancing cost and avoid (more)

Issaeva, Natalia

2009-01-01T23:59:59.000Z

149

Steady decline of east Asian monsoon winds, 19692000: Evidence from direct ground measurements of wind speed  

E-Print Network (OSTI)

Steady decline of east Asian monsoon winds, 1969­2000: Evidence from direct ground measurements winter monsoon but strengthen the summer monsoon, because of stronger warming over high-latitude land with the east Asian monsoon has significantly weakened in both winter and summer in the recent three decades

Chang, Chih-Pei

150

The importance of combined cycle generating plants in integrating large levels of wind power generation  

Science Conference Proceedings (OSTI)

Integration of high wind penetration levels will require fast-ramping combined cycle and steam cycles that, due to higher operating costs, will require proper pricing of ancillary services or other forms of compensation to remain viable. Several technical and policy recommendations are presented to help realign the generation mix to properly integrate the wind. (author)

Puga, J. Nicolas

2010-08-15T23:59:59.000Z

151

A Comparison of Several Single-Pass Estimators of the Standard Deviation of Wind Direction  

Science Conference Proceedings (OSTI)

Computation of the standard deviation of wind direction ?? generally requires repeated consideration of the individual measurements of wind direction. This need for multiple passes through the data sample can create a storage problem for small or ...

R. J. Yamartino

1984-09-01T23:59:59.000Z

152

On the Ability of the WRF Model to Reproduce the Surface Wind Direction over Complex Terrain  

Science Conference Proceedings (OSTI)

The ability of the Weather Research and Forecasting (WRF) model to reproduce the surface wind direction over complex terrain is examined. A simulation spanning a winter season at a high horizontal resolution of 2 km is compared with wind direction ...

Pedro A. Jimnez; Jimy Dudhia

2013-07-01T23:59:59.000Z

153

A New Approach for the Determination of Horizontal Wind Direction Fluctuations  

Science Conference Proceedings (OSTI)

A new method to determine horizontal wind direction fluctuations ?? is presented based on the hypothesis of a Gaussian distribution of wind direction that gradually moves to a circular, uniform distribution under near-clam conditions. A ...

J. I. Ibarra

1995-09-01T23:59:59.000Z

154

A Simple Method for Determining the Standard Deviation of Wind Direction  

Science Conference Proceedings (OSTI)

The discontinuity of the wind direction at 360 complicates automatic calculations of some atmospheric parameters. Various methods were suggested to obtain the standard deviation of the wind direction (??). They are reviewed and a simple, once ...

D. Skibin

1984-03-01T23:59:59.000Z

155

The role of hydroelectric generation in electric power systems with large scale wind generation  

E-Print Network (OSTI)

An increasing awareness of the operational challenges created by intermittent generation of electricity from policy-mandated renewable resources, such as wind and solar, has led to increased scrutiny of the public policies ...

Hagerty, John Michael

2012-01-01T23:59:59.000Z

156

Source Terms in a Third-Generation Wind Wave Model  

Science Conference Proceedings (OSTI)

A new third-generation ocean wind wave model is presented. This model is based on previously developed input and nonlinear interaction source terms and a new dissipation source term. It is argued that the dissipation source term has to be modeled ...

Hendrik L. Tolman; Dmitry Chalikov

1996-11-01T23:59:59.000Z

157

Power and Frequency Control as it Relates to Wind-Powered Generation  

E-Print Network (OSTI)

amount of wind power generation that can be accommodated.ramping of generation Power and Frequency Control as itfrequency to loss of generation Power and Frequency Control

Lacommare, Kristina S H

2011-01-01T23:59:59.000Z

158

Grid-Connected Renewable Energy Generation Toolkit-Wind | Open Energy  

Open Energy Info (EERE)

Grid-Connected Renewable Energy Generation Toolkit-Wind Grid-Connected Renewable Energy Generation Toolkit-Wind Jump to: navigation, search Tool Summary Name: Grid-Connected Renewable Energy Generation Toolkit-Wind Agency/Company /Organization: United States Agency for International Development Sector: Energy Focus Area: Wind Resource Type: Training materials Website: www.energytoolbox.org/gcre/mod_6/index.shtml Grid-Connected Renewable Energy Generation Toolkit-Wind Screenshot References: Grid-Connected Renewable Energy Generation Toolkit-Wind[1] Logo: Grid-Connected Renewable Energy Generation Toolkit-Wind GCREwind.JPG References ↑ "Grid-Connected Renewable Energy Generation Toolkit-Wind" Retrieved from "http://en.openei.org/w/index.php?title=Grid-Connected_Renewable_Energy_Generation_Toolkit-Wind&oldid=375084"

159

Impact assessment of wind generation on the operations of a power system  

SciTech Connect

The impact of intermittent wind generation on the operations of the Tennessee Valley Authority (TVA) power system is investigated. The operations of the TVA power system are outlined, and the hypothetical reconfiguration of the TVA transmission system to accommodate wind generation is described. Simulations and analyses of wind generation impacts on unit commitment, unit predispatch, and automatic control of generation are also presented.

Sadanandan, N.D.; Hilson, D.W.; Morris, K.W.; Needham, M.E.; Sendaula, M.

1983-09-01T23:59:59.000Z

160

A variable speed wind generator maximum power tracking based on adaptative neuro-fuzzy inference system  

Science Conference Proceedings (OSTI)

The power from wind varies depending on the environmental factors. Many methods have been proposed to locate and track the maximum power point (MPPT) of the wind, such as the fuzzy logic (FL), artificial neural network (ANN) and neuro-fuzzy. In this ... Keywords: ANFIS, MPPT, Power generation, Variable speed wind generator, Wind energy

A. Meharrar; M. Tioursi; M. Hatti; A. Boudghne Stambouli

2011-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "direct wind generator" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

M.Nagrial, Switched reluctance generator for wind power applications  

E-Print Network (OSTI)

AbstractGreen house effect has becomes a serious concern in many countries due to the increase consumption of the fossil fuel. There have been many studies to find an alternative power source. Wind energy found to be one of the most useful solutions to help in overcoming the air pollution and global. There is no agreed solution to conversion of wind energy to electrical energy. In this paper, the advantages of using a Switched Reluctance Generator (SRG) for wind energy applications. The theoretical study of the self excitation of a SRG and the determination of the variable parameters in a SRG design are discussed. The design parameters for the maximum power output of the SRG are computed using Matlab simulation. The designs of the circuit to control the variable parameters in a SRG to provide the maximum power output are also discussed.

M. Nassereddine; J. Rizk; M. Nagrial

2008-01-01T23:59:59.000Z

162

Candidate wind turbine generator site, Culebra, Puerto Rico. Annual data summary, October 1978-September 1979  

DOE Green Energy (OSTI)

This report summarizes wind speed and direction data collected on meteorological towers at 14 candidate and wind turbine generator installation sites from October 1978 through September 1979. The basic method of data collection is by digital data cassette recording systems. For the digital data reported, an instantaneous sample is recorded every 2 minutes. An explanation is provided for each data summary table as well as information on how specific values were computed. The rest of the report presents the annual summarized data for each site.

Not Available

1980-07-01T23:59:59.000Z

163

Candidate wind turbine generator site, Culebra, Puerto Rico. Annual data summary, January-December 1979  

DOE Green Energy (OSTI)

This report summarizes wind speed and direction data collected on meteorological towers at 14 candidate and wind turbine generator installation sites from January 1979 through December 1979. The basic method of data collection is by digital data cassette recording systems. For the digital data reported, an instantaneous sample is recorded every 2 minutes. An explanation is included for each data summary table as well as information on how specific values were computed. The rest of the report presents the annual summarized data for each site.

None

1980-06-01T23:59:59.000Z

164

Analyzing the Effects of Temporal Wind Patterns on the Value of Wind-Generated Electricity at Different Sites in California and the Northwest  

E-Print Network (OSTI)

the Value of Wind-Generated Electricity References TrueWindValuing the Time-Varying Electricity Production of Solarthe Value of Wind-Generated Electricity References Gipe, P.

Fripp, Matthias; Wiser, Ryan

2006-01-01T23:59:59.000Z

165

Small Wind Guidebook/How Much Energy Will My System Generate | Open Energy  

Open Energy Info (EERE)

How Much Energy Will My System Generate How Much Energy Will My System Generate < Small Wind Guidebook Jump to: navigation, search Print PDF WIND ENERGY STAKEHOLDER ENGAGEMENT & OUTREACHSmall Wind Guidebook Home WindTurbine-icon.png Small Wind Guidebook * Introduction * First, How Can I Make My Home More Energy Efficient? * Is Wind Energy Practical for Me? * What Size Wind Turbine Do I Need? * What Are the Basic Parts of a Small Wind Electric System? * What Do Wind Systems Cost? * Where Can I Find Installation and Maintenance Support? * How Much Energy Will My System Generate? * Is There Enough Wind on My Site? * How Do I Choose the Best Site for My Wind Turbine? * Can I Connect My System to the Utility Grid? * Can I Go Off-Grid? * State Information Portal * Glossary of Terms * For More Information

166

Direct connection of series self-excited generators and HVDC converters  

Science Conference Proceedings (OSTI)

An alternative and simpler solution is proposed for the direct connection of generators to HVdc converters. The generator exciter windings are connected in series with the output of the HVdc converter and take the place of the conventional smoothing reactor. Existing steady state and time domain simulation programs are modified to represent the behavior of the series direct connection scheme. It is shown that series excitation extends naturally the power transmission capability and permits fast fault clearances.

Arrillaga, J.; Macdonald, S.J.; Watson, N.R.; Watson, S. (Univ. Canterbury, Christchurch (New Zealand))

1993-10-01T23:59:59.000Z

167

EA-1857: Wind Turbine Power Generation Complex at Idaho National Laboratory  

Energy.gov (U.S. Department of Energy (DOE))

This EA would evaluate the environmental impacts of the proposed wind turbine power generation complex at Idaho National Laboratory, Idaho.

168

ABO Wind AG | Open Energy Information  

Open Energy Info (EERE)

ABO Wind AG Place Hessen, Germany Zip 65193 Sector Bioenergy, Wind energy Product German developer of wind and bioenergy generation assets. ABO Wind has no direct holding in any...

169

The Application of Diode-Clamped Cascaded Inverter in the Direct-Driven Wind Power System  

Science Conference Proceedings (OSTI)

Power inverter is widely used in direct-driven variable speed constant frequency (VSVF) wind power system. With the level of wind power jumping from the kilowatt to megawatt, topologies and control of inverter have a corresponding change. Considering ... Keywords: direct-driven wind power, multi-level inverter, diode-clamped cascaded inverter, PD-SPWM and CPS-SPWM

Xianglian Xu; Pingting Xu; Zilin Tang; Gang Tang; Xiaole Ye

2012-04-01T23:59:59.000Z

170

Dynamic Simulation Studies of the Frequency Response of the Three U.S. Interconnections with Increased Wind Generation  

E-Print Network (OSTI)

factor. Type 2 Wind Turbine Generator (Wound Rotor InductionTurbine Generator (Doubly-fed Induction (Asynchronous) Generator: The rotor

Mackin, Peter

2011-01-01T23:59:59.000Z

171

Method for changing removable bearing for a wind turbine generator  

DOE Patents (OSTI)

A wind generator having removable change-out bearings includes a rotor and a stator, locking bolts configured to lock the rotor and stator, a removable bearing sub-assembly having at least one shrunk-on bearing installed, and removable mounting bolts configured to engage the bearing sub-assembly and to allow the removable bearing sub-assembly to be removed when the removable mounting bolts are removed.

Bagepalli, Bharat Sampathkumaran (Niskayuna, NY); Jansen, Patrick Lee (Scotia, NY), Gadre; Aniruddha Dattatraya (Rexford, NY)

2008-04-22T23:59:59.000Z

172

Short Circuit Current Contribution for Different Wind Turbine Generator Types  

DOE Green Energy (OSTI)

An important aspect of wind power plant (WPP) impact studies is to evaluate the short circuit (SC) current contribution of the plant into the transmission network under different fault conditions. This task can be challenging to protection engineers due to the topology differences between different types of wind turbine generators (WTGs) and the conventional generating units. This paper represents simulation results for short circuit current contribution for different types of WTGs obtained through transient analysis using generic WTG models. The obtained waveforms are analyzed to explain the behavior, such as peak values and rate of decay, of the WTG. The effect of fault types and location, and the effect of the control algorithms of power converters on SC current contribution are investigated. It is shown that the response of the WPP to faults will vary based on the type of the installed WTGs. While in Type 1 and Type 2 WTGs, short circuit current will be determined by the physical characteristics of the induction generator, the contribu-tion of Type 3 and Type 4 WTG will be mostly characterized by the power converters control algorithms which are usually considered proprietary information by the wind turbine manufacturers.

Muljadi, E.; Samaan, Nader A.; Gevorgian, Vahan; Li, Jun; Pasupulati, Subbaiah

2010-09-28T23:59:59.000Z

173

Comparison on control strategies of the grid-side converter of variable speed constant frequency doubly-fed wind power generation system  

Science Conference Proceedings (OSTI)

Direct power control, vector control based on d-q synchronous rotating reference frame and ?-? static reference frame for the grid-side converter of variable speed constant frequency doubly-fed wind turbines are analyzed. System simulation ... Keywords: ?-? static reference frame, d-q rotating reference frame, direct power control, doubly-fed wind power generation system, grid-side converter

Xian-Ming Zhou; Ting-Long Pan; Zhi-Cheng Ji

2009-06-01T23:59:59.000Z

174

Estimator for the Standard Deviation of Wind Direction Based on Moments of the Cartesian Components  

Science Conference Proceedings (OSTI)

Mean and variance of horizontal wind direction are defined in a minimal variance sense. Starting from a theoretical model, termed anisotropic Gaussian model, of the probability density functions of the Cartesian wind components, the standard ...

Rudolf Weber

1991-09-01T23:59:59.000Z

175

Bias Correction and Bayesian Model Averaging for Ensemble Forecasts of Surface Wind Direction  

Science Conference Proceedings (OSTI)

Wind direction is an angular variable, as opposed to weather quantities such as temperature, quantitative precipitation, or wind speed, which are linear variables. Consequently, traditional model output statistics and ensemble postprocessing ...

Le Bao; Tilmann Gneiting; Eric P. Grimit; Peter Guttorp; Adrian E. Raftery

2010-05-01T23:59:59.000Z

176

Modeling and Model Validation for Variable Generation Technologies: Focus on Wind Generation  

Science Conference Proceedings (OSTI)

The influx of variable-generation technologies, particularly wind generation, into the bulk transmission grid has been tremendous over the past decade. This trend will likely continue, in light of national and state renewable portfolio standards. Thus, there is a need for generic, standard, and publicly available models for variable-generation technologies for power system planning studies. The Electric Power Research Institute (EPRI), in collaboration with the Western Electricity Coordinating Council (...

2010-12-14T23:59:59.000Z

177

Dynamic average-value modeling of doubly-fed induction generator wind energy conversion systems.  

E-Print Network (OSTI)

??In a Doubly-fed Induction Generator (DFIG) wind energy conversion system, the rotor of a wound rotor induction generator is connected to the grid via a (more)

Shahab, Azin

2013-01-01T23:59:59.000Z

178

U.S. wind generation increased 27% in 2011 | U.S. Energy ...  

U.S. Energy Information Administration (EIA)

tags: capacity electricity generation generation capacity renewable wind. Email Updates. RSS Feeds. Facebook. Twitter. YouTube. Add us to your site.

179

Improving the reliability of wind power through spatially distributed wind generation.  

E-Print Network (OSTI)

??Wind power is a fast-growing, sustainable energy source. However, the problem of wind variability as it relates to wind power reliability is an obstacle to (more)

Fisher, Samuel Martin

2012-01-01T23:59:59.000Z

180

Sensorless Adaptive Output Feedback Control of Wind Energy Systems with PMS Generators  

E-Print Network (OSTI)

1 Sensorless Adaptive Output Feedback Control of Wind Energy Systems with PMS Generators A. El the problem of controlling wind energy conversion (WEC) systems involving permanent magnet synchronous is to maximize wind energy extraction which cannot be achieved without letting the wind turbine rotor operate

Paris-Sud XI, Université de

Note: This page contains sample records for the topic "direct wind generator" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Protection from ground faults in the stator winding of generators at power plants in the Siberian networks  

SciTech Connect

The experience of many years of experience in developing and utilization of ground fault protection in the stator winding of generators in the Siberian networks is generalized. The main method of protection is to apply a direct current or an alternating current with a frequency of 25 Hz to the primary circuits of the stator. A direct current is applied to turbo generators operating in a unit with a transformer without a resistive coupling to the external grid or to other generators. Applying a 25 Hz control current is appropriate for power generation systems with compensation of a capacitive short circuit current to ground. This method forms the basis for protection of generators operating on busbars, hydroelectric generators with a neutral grounded through an arc-suppression reactor, including in consolidated units with generators operating in parallel on a single low-voltage transformer winding.

Vainshtein, R. A., E-mail: vra@tpu.ru [Tomsk Polytechnical University (Russian Federation); Lapin, V. I. [ODU Sibiri (Integrated Dispatcher Control for Siberia), branch of JSC 'SO EES' (Russian Federation); Naumov, A. M.; Doronin, A. V. [JSC NPP 'EKRA' (Russian Federation); Yudin, S. M. [Tomsk Polytechnical University (Russian Federation)

2010-05-15T23:59:59.000Z

182

10MW Class Direct Drive HTS Wind Turbine: Cooperative Research and Development Final Report, CRADA Number CRD-08-00312  

DOE Green Energy (OSTI)

This paper summarizes the work completed under the CRADA between NREL and American Superconductor (AMSC). The CRADA combined NREL and AMSC resources to benchmark high temperature superconducting direct drive (HTSDD) generator technology by integrating the technologies into a conceptual wind turbine design, and comparing the design to geared drive and permanent magnet direct drive (PMDD) wind turbine configurations. Analysis was accomplished by upgrading the NREL Wind Turbine Design Cost and Scaling Model to represent geared and PMDD turbines at machine ratings up to 10 MW and then comparing cost and mass figures of AMSC's HTSDD wind turbine designs to theoretical geared and PMDD turbine designs at 3.1, 6, and 10 MW sizes.

Musial, W.

2011-05-01T23:59:59.000Z

183

10MW Class Direct Drive HTS Wind Turbine: Cooperative Research and Development Final Report, CRADA Number CRD-08-00312  

SciTech Connect

This paper summarizes the work completed under the CRADA between NREL and American Superconductor (AMSC). The CRADA combined NREL and AMSC resources to benchmark high temperature superconducting direct drive (HTSDD) generator technology by integrating the technologies into a conceptual wind turbine design, and comparing the design to geared drive and permanent magnet direct drive (PMDD) wind turbine configurations. Analysis was accomplished by upgrading the NREL Wind Turbine Design Cost and Scaling Model to represent geared and PMDD turbines at machine ratings up to 10 MW and then comparing cost and mass figures of AMSC's HTSDD wind turbine designs to theoretical geared and PMDD turbine designs at 3.1, 6, and 10 MW sizes.

Musial, W.

2011-05-01T23:59:59.000Z

184

Generation of residual energy in the turbulent solar wind  

SciTech Connect

In situ observations of the fluctuating solar wind flow show that the energy of magnetic field fluctuations always exceeds that of the kinetic energy, and therefore the difference between the kinetic and magnetic energies, known as the residual energy, is always negative. The same behaviour is found in numerical simulations of magnetohydrodynamic turbulence. We study the dynamics of the residual energy for strong, anisotropic, critically balanced magnetohydrodynamic turbulence using the eddy damped quasi-normal Markovian approximation. Our analysis shows that for stationary critically balanced magnetohydrodynamic turbulence, negative residual energy will always be generated by nonlinear interacting Alfven waves. This offers a general explanation for the observation of negative residual energy in solar wind turbulence and in the numerical simulations.

Gogoberidze, G. [Centre for Fusion, Space and Astrophysics, University of Warwick, Coventry CV4 7AL (United Kingdom); Institute of Theoretical Physics, Ilia State University, 3/5 Cholokashvili Ave., 0162 Tbilisi (Georgia); Chapman, S. C.; Hnat, B. [Centre for Fusion, Space and Astrophysics, University of Warwick, Coventry CV4 7AL (United Kingdom)

2012-10-15T23:59:59.000Z

185

Wind Generation in the Future Competitive California Power Market  

DOE Green Energy (OSTI)

The goal of this work is to develop improved methods for assessing the viability of wind generation in competitive electricity markets. The viability of a limited number of possible wind sites is assessed using a geographic information system (GIS) to determine the cost of development, and Elfin, an electric utility production costing and capacity expansion model, to estimate the possible revenues and profits of wind farms at the sites. This approach improves on a simple profitability calculation by using a site-specific development cost calculation and by taking the effect of time varying market prices on revenues into account. The first component of the work is to develop data characterizing wind resources suitable for use in production costing and capacity expansion models, such as Elfin, that are capable of simulating competitive electricity markets. An improved representation of California wind resources is built, using information collected by the California Energy Commission (CE C) in previous site evaluations, and by using a GIS approach to estimating development costs at 36 specific sites. These sites, which have been identified as favorable for wind development, are placed on Digital Elevation Maps (DEMs) and development costs are calculated based on distances to roads and transmission lines. GIS is also used to develop the potential capacity at each site by making use of the physical characteristics of the terrain, such as ridge lengths. In the second part of the effort, using a previously developed algorithm for simulating competitive entry to the California electricity market, the Elfin model is used to gauge the viability of wind farms at the 36 sites. The results of this exercise are forecasts of profitable development levels at each site and the effects of these developments on the electricity system as a whole. Under best guess assumptions, including prohibition of new nuclear and coal capacity, moderate increase in gas prices and some decline in renewable capital costs, about 7.35 GW of the 10 GW potential capacity at the 36 specific sites is profitably developed and 62 TWh of electricity produced per annum by the year 2030. Most of the development happens during the earlier years of the forecast. Sensitivity of these results to future gas price scenarios is also presented. This study also demonstrates that an analysis based on a simple levelized profitability calculation approach does not sufficiently capture the implications of time varying prices in a competitive market.

Sezgen, O.; Marnay, C.; Bretz, S.

1998-03-01T23:59:59.000Z

186

Wind Generators and Market Power: Does it matter who owns them?  

E-Print Network (OSTI)

Electricity production from wind generators holds significant importance in European Unions 20 % renewable energy target by 2020. In this paper, I show that ownership of wind generators affects market outcomes by using both a Cournot oligopoly model and a real options model. In the Cournot oligopoly model, ownership of the wind generators by owners of fossil-fueled (peakload) generators decreases total peakload production and increases the market price. These effects increase with total wind generation and aggregate wind generator ownership. In the real options model, start up and shut down price thresholds are significantly higher when the monopolist at the peakload level owns both types of generators. Furthermore, when producing electricity with the peakload generator, the monopolist can avoid facing prices below marginal cost by owning a certain share of the wind generators.

Nihat Misir

2012-01-01T23:59:59.000Z

187

Modelling and Analysis of Variable Speed Wind Turbines with Induction Generator during Grid  

E-Print Network (OSTI)

Modelling and Analysis of Variable Speed Wind Turbines with Induction Generator during Grid Fault Wind Turbines with Induction Generator during Grid Fault by Sigrid M. Bolik Institute of Energy turbine technology has undergone rapid developments. Growth in size and the optimization of wind turbines

Hansen, René Rydhof

188

The State of the Art of Generators for Wind Energy Conversion Systems  

E-Print Network (OSTI)

The State of the Art of Generators for Wind Energy Conversion Systems Yassine Amirat, Mohamed Benbouzid, Bachir Bensaker and René Wamkeue Abstract--Wind Energy Conversion Systems (WECS) have become. I. INTRODUCTION Wind energy conversion is the fastest-growing source of new electric generation

Paris-Sud XI, Université de

189

Original articles: Flicker mitigation in a doubly fed induction generator wind turbine system  

Science Conference Proceedings (OSTI)

This paper describes a doubly fed induction generator (DFIG) control for wind energy generation. The DFIG model is established and the adopted control strategies for machine side and grid side converters are described. Flicker phenomenon is defined and ... Keywords: Doubly fed induction generator, Flicker, Machine side converter, Power quality, Wind power generation

Mohamed Machmoum; Ahmad Hatoum; Toufik Bouaouiche

2010-10-01T23:59:59.000Z

190

The role of wind generation in European power sector decarbonization : a general equilibrium analysis  

E-Print Network (OSTI)

Wind generation has been growing fast, with onshore wind having a 27% average annual growth rate over the past decade. Motivated by this growth, a comprehensive analysis of both the economic and engineering implications ...

Karkatsouli, Ioanna

2013-01-01T23:59:59.000Z

191

Low voltage ride-through capability improvement of wind power generation using dynamic voltage restorer  

Science Conference Proceedings (OSTI)

Recently, the total amount of generation from wind power plants has been increased all over the world. In this situation, a large amount of disconnection of wind generation may give a serious influence in the power system. Consequently, Low Voltage Ride-Through ... Keywords: dynamic voltage restorer, energy storage, fault ride-through, fixed-speed induction generator, low voltage ride-through, voltage sag, wind power generation

Naohiro Hasegawa; Teruhisa Kumano

2010-02-01T23:59:59.000Z

192

Analysis of the electrical harmonic characteristics of a slip recovery variable speed generating system for wind turbine applications  

SciTech Connect

Variable speed electric generating technology can enhance the general use of wind energy in electric utility applications. This enhancement results from two characteristic properties of variable speed wind turbine generators: an improvement in drive train damping characteristics, which results in reduced structural loading on the entire wind turbine system, and an improvement in the overall efficiency by using a more sophisticated electrical generator. Electronic converter systems are the focus of this investigation -- in particular, the properties of a wound-rotor induction generator with the slip recovery system and direct-current link converter. Experience with solid-state converter systems in large wind turbines is extremely limited. This report presents measurements of electrical performances of the slip recovery system and is limited to the terminal characteristics of the system. Variable speed generating systems working effectively in utility applications will require a satisfactory interface between the turbine/generator pair and the utility network. The electrical testing described herein focuses largely on the interface characteristics of the generating system. A MOD-O wind turbine was connected to a very strong system; thus, the voltage distortion was low and the total harmonic distortion in the utility voltage was less than 3% (within the 5% limit required by most utilities). The largest voltage component of a frequency below 60 Hz was 40 dB down from the 60-Hz< component. 8 refs., 14 figs., 8 tabs.

Herrera, J.I.; Reddoch, T.W.

1988-02-01T23:59:59.000Z

193

IEEE TRANSACTIONS ON POWER SYSTEMS, VOL. 27, NO. 1, FEBRUARY 2012 465 Dynamics of Type-3 Wind Turbine Generator Models  

E-Print Network (OSTI)

wind farm developments. Such WTGs are also known as doubly fed induction generators (DFIGs) or doubly

Hiskens, Ian A.

194

Microsoft PowerPoint - 4FO-6-Parker-BNL-Direct-Wind-Magnets.pptx  

NLE Websites -- All DOE Office Websites (Extended Search)

* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * presented by Brett Parker, BNL-SMD presented by Brett Parker, BNL-SMD BNL Direct Wind Magnets * BNL Direct Wind Magnets * *In memory of Pat Thompson *In memory of Pat Thompson * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Outline: BNL Direct Wind Magnets * Overview production process and terminology. - Coil Winding, Wrapping, Measurement, and Curing - Planar Patterns versus Serpentine Coils - Multifunction, Multi-Layer Coils and Field Quality * Examples from past and current projects. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Examples from past and current projects. - ILC QD0 R&D Prototype and ATF2 Upgrade Magnets

195

The Probability Distribution of Wind Power From a Dispersed Array of Wind Turbine Generators  

Science Conference Proceedings (OSTI)

A method is presented for estimating the probability distribution of wind power from a dispersed array of wind turbine sites where the correlation between wind speeds at distinct sites is less than unity. The distribution is obtained from a model ...

John Carlin; John Haslett

1982-03-01T23:59:59.000Z

196

An Analysis of Wind Direction and Horizontal Wind Component Fluctuations over Complex Terrain  

Science Conference Proceedings (OSTI)

Based on an extensive wind dataset over complex terrain, the commonly used small-angle approximation ?v ? ??V is studied and found to overestimate over all wind speeds and ?? values observed. This should be anticipated due to the assumptions ...

K. H. Papadopoulos; C. G. Helmis; G. T. Amanatidis

1992-09-01T23:59:59.000Z

197

Wind shear for large wind turbine generators at selected tall tower sites  

DOE Green Energy (OSTI)

The objective of the study described in this report is to examine the nature of wind shear profiles and their variability over the height of large horizontal-axis wind turbines and to provide information on wind shear relevant to the design and opertion of large wind turbines. Wind turbine fatigue life and power quality are related through the forcing functions on the blade to the shapes of the wind shear profiles and their fluctuations over the disk of rotation.

Elliott, D.L.

1984-04-01T23:59:59.000Z

198

Secretary Chu Announces $45 Million to Support Next Generation of Wind  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Announces $45 Million to Support Next Generation of Announces $45 Million to Support Next Generation of Wind Turbine Designs Secretary Chu Announces $45 Million to Support Next Generation of Wind Turbine Designs November 23, 2009 - 12:00am Addthis WASHINGTON, DC - U.S. Department of Energy Secretary Steven Chu today announced the selection of Clemson University to receive up to $45 million under the American Recovery and Reinvestment Act for a wind energy test facility that will enhance the performance, durability, and reliability of utility-scale wind turbines. This investment will support jobs and strengthen American leadership in wind energy technology by supporting the testing of next-generation wind turbine designs. "Wind power holds tremendous potential to help create new jobs and reduce carbon pollution," said Secretary Chu. "We are at the beginning of a new

199

Secretary Chu Announces $45 Million to Support Next Generation of Wind  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Secretary Chu Announces $45 Million to Support Next Generation of Secretary Chu Announces $45 Million to Support Next Generation of Wind Turbine Designs Secretary Chu Announces $45 Million to Support Next Generation of Wind Turbine Designs November 23, 2009 - 12:00am Addthis WASHINGTON, DC - U.S. Department of Energy Secretary Steven Chu today announced the selection of Clemson University to receive up to $45 million under the American Recovery and Reinvestment Act for a wind energy test facility that will enhance the performance, durability, and reliability of utility-scale wind turbines. This investment will support jobs and strengthen American leadership in wind energy technology by supporting the testing of next-generation wind turbine designs. "Wind power holds tremendous potential to help create new jobs and reduce

200

Anemometer Data (Wind Speed, Direction) for YKHC-Bethel, AK (2003 - 2004) |  

Open Energy Info (EERE)

YKHC-Bethel, AK (2003 - 2004) YKHC-Bethel, AK (2003 - 2004) Dataset Summary Description Wind data collected from YKHC - Bethel in Alaska from an anemometer as part of the Native American anemometer loan program. Monthly mean wind speed is available for 2003 through 2004, as is wind direction and turbulence data. Data is reported from a height of 20 m. The data was originally made available by Wind Powering America, a DOE Office of Energy Efficiency & Renewable Energy (EERE) program. A dynamic map displaying all available data from DOE anemometer loan programs is available http://www.windpoweringamerica.gov/anemometerloans/projects.asp. Source EERE Date Released November 09th, 2010 (4 years ago) Date Updated November 09th, 2010 (4 years ago) Keywords wind wind direction wind speed

Note: This page contains sample records for the topic "direct wind generator" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Computations of the Response of a Wave Spectrum to a Sudden Change in Wind Direction  

Science Conference Proceedings (OSTI)

The response of a wind-sea spectrum to a step function change in wind direction is investigated theoretically for a sequence of direction changes ranging from 30 to 180, in increments of 30. Two spectral energy balance models are used: the ...

I. R. Young; S. Hasselmann; K. Hasselmann

1987-09-01T23:59:59.000Z

202

Literature Review of the Impact of Wind Turbine Generator Induced Sound on Wildlife  

Science Conference Proceedings (OSTI)

This review describes findings of a scientific literat ure search evaluating effects of exposure to wind turbine-generated sound on wildlife. It also provides a searchable digital database of over 350 literature sources related to this topic.BackgroundThe proliferation of wind energy generation facilities has created immense pressure to understand the impact on the local ecosystem of all aspects of these new systems, including sound generated by wind ...

2012-12-20T23:59:59.000Z

203

New Models and Analytical Frameworks for Power Systems with Wind Generation.  

E-Print Network (OSTI)

??Wind energy is a proven energy source that does not contribute to emission of greenhouse gases, air and water pollution, or generate large quantities of (more)

Ahmed, Mohamed Hassan Mohamed Sadek

2012-01-01T23:59:59.000Z

204

Fault detection of fault ride through for doubly-fed induction generator based wind energy systems.  

E-Print Network (OSTI)

??Fault detection and mitigation is of high importance for existing DFIG based wind energy conversion systems. Keeping the doubly-fed induction generator (DFIG) online during faults (more)

Ramroop, Shoba AD

2008-01-01T23:59:59.000Z

205

U.S. wind generation increased 27% in 2011 - Today in Energy - U.S ...  

U.S. Energy Information Administration (EIA)

Generation from wind turbines in the United States increased 27% in 2011 compared to 2010, continuing a trend of rapid growth. During the past five years capacity ...

206

Control design and analysis of doubly-fed induction generator in wind power application.  

E-Print Network (OSTI)

??The work presented in this thesis includes control system design, analysis and grid synchronization of a DFIG (doubly-fed induction generator) driven by a wind turbine (more)

Mazari, Shukul

2009-01-01T23:59:59.000Z

207

Adaptive control and parameter identification of a doubly-fed induction generator for wind power .  

E-Print Network (OSTI)

??The use of Doubly-Fed Induction Generators (DFIG) for wind energy conversion is addressed in this thesis. It is well known that when the stator is (more)

Orfanos-Pepainas, Stamatios

2011-01-01T23:59:59.000Z

208

Energy Storage Solutions for Wind Generator Connected Distribution Systems in Rural Ontario.  

E-Print Network (OSTI)

??Environmental awareness and uncertainty about continued supply of fossil fuel has given rise to the renewable energy movement. Wind based power generation has been at (more)

Rahman, Mohammed Nahid

2009-01-01T23:59:59.000Z

209

Relationship Between Wind Generation and Balancing Energy Market Prices in ERCOT: 2007-2009  

DOE Green Energy (OSTI)

This paper attempts to measure the average marginal effects of wind generation on the balancing-energy market price in ERCOT with the help of econometric analysis.

Nicholson, E.; Rogers, J.; Porter, K.

2010-11-01T23:59:59.000Z

210

A doubly-fed induction generator and energy storage system for wind power applications.  

E-Print Network (OSTI)

??Wind generation has become the most important alternate energy source and has experienced increased growth in Europe during the past decade while more recently, the (more)

Abbey, Chad

2004-01-01T23:59:59.000Z

211

Geek-Up[04.01.2011]: Charting Wind, Thermal, Hydro Generation...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Office of Public Affairs Check out Bonneville Power Administration's new near real-time energy monitoring - it displays the output of all wind, thermal and hydro generation in...

212

A next-generation modeling capability assesses wind turbine array fluid dynamics and aeroelastic simulations  

E-Print Network (OSTI)

A next-generation modeling capability assesses wind turbine array fluid dynamics and aeroelastic conditions with turbine models covering the range of scales important for wind plant dynamics to help address the impacts that upwind turbines have on turbines in their wake and give greater insight into overall wind

213

Study on Aerodynamic Design of Horizontal Axis Wind Turbine Generator System  

Science Conference Proceedings (OSTI)

In this paper the choosing principles of design parameters and multi-airfoils in horizontal axis wind turbine (HAWT) generator system aerodynamic design are introduced. On the basis of the comparison analysis of wind turbine aerodynamic design method ... Keywords: Schmitz, airfoil, partial load, horizontal axis wind turbine (HAWT), blade tip speed ratio (BTSR)

Li Dong; Mingfu Liao; Yingfeng Li; Xiaoping Song; Ke Xu

2009-10-01T23:59:59.000Z

214

Reference value choice of the wind turbine active power with doubly-fed induction generator  

Science Conference Proceedings (OSTI)

The variable speed wind turbine with doubly-fed induction generator (DFIG) is today widely used concept. This paper presents a control system of the DFIG wind turbine with focus on the control strategies and on active power reference value choice. The ... Keywords: DFIG, dynamic simulation, reference value of active power, wind turbine

J. Smajo; M. Smajo; D. Vukadinovic

2005-11-01T23:59:59.000Z

215

IMPACTS TO BIRDS CAUSED BY WIND ENERGY GENERATION 4.1 INTRODUCTION  

E-Print Network (OSTI)

77 CHAPTER 4 IMPACTS TO BIRDS CAUSED BY WIND ENERGY GENERATION 4.1 INTRODUCTION Bird mortality studies reporting on wind energy facilities elsewhere regularly report that bird mortality in the APWRA is unusually high there and is, therefore, an anomaly among wind energy facilities in the United States. We

216

Performance Improvement of Doubly Fed Induction Generator-based Wind Energy Conversion System during Various Internal Converter Faults.  

E-Print Network (OSTI)

??The doubly fed induction generator (DFIG)-based wind energy conversion system (WECS) currently dominates the wind energy market due to its advantages over other WECSs. In (more)

Abdou, Ahmed

2013-01-01T23:59:59.000Z

217

Pitch-Controlled Variable-Speed Wind Turbine Generation  

NLE Websites -- All DOE Office Websites (Extended Search)

Pitch-Controlled Variable-Speed Pitch-Controlled Variable-Speed Wind Turbine Generation February 2000 * NREL/CP-500-27143 E. Muljadi and C.P. Butterfield Presented at the 1999 IEEE Industry Applications Society Annual Meeting Phoenix, Arizona October 3-7, 1999 National Renewable Energy Laboratory 1617 Cole Boulevard Golden, Colorado 80401-3393 NREL is a U.S. Department of Energy Laboratory Operated by Midwest Research Institute * * * * Battelle * * * * Bechtel Contract No. DE-AC36-99-GO10337 NOTICE The submitted manuscript has been offered by an employee of the Midwest Research Institute (MRI), a contractor of the US Government under Contract No. DE-AC36-99GO10337. Accordingly, the US Government and MRI retain a nonexclusive royalty-free license to publish or reproduce the published form of this contribution, or allow others to do so, for US Government purposes.

218

Wind Rose Bias Correction  

Science Conference Proceedings (OSTI)

Wind rose summaries, which provide a basis for understanding and evaluating the climatological behavior of local wind, have a directional bias if a conventional method is used in their generation. Three techniques used to remove this bias are ...

Scott Applequist

2012-07-01T23:59:59.000Z

219

Power System Modeling of 20percent Wind-Generated Electricity by 2030  

E-Print Network (OSTI)

geographic regions via transmission lines. We assumed thatthe costs of building transmission lines directly from theevaluated. 3) New transmission lines the WinDS model can

Hand, Maureen

2008-01-01T23:59:59.000Z

220

Wind for Schools: Developing Educational Programs to Train the Next Generation of Wind Energy Experts (Poster)  

DOE Green Energy (OSTI)

As the world moves toward a vision of expanded wind energy, the industry is faced with the challenges of obtaining a skilled workforce and addressing local wind development concerns. Wind Powering America's Wind for Schools Program works to address these issues. The program installs small wind turbines at community "host" schools while developing wind application centers at higher education institutions. Teacher training with interactive and interschool curricula is implemented at each host school, while students at the universities assist in implementing the host school systems while participating in other wind course work. This poster provides an overview of the program's objectives, goals, approach, and results.

Baring-Gould, I.; Flowers, L.; Kelly, M.; Miles, J.

2009-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "direct wind generator" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Abstract--This paper presents a comparative stability analysis of conventional synchronous generators and wind farms based on  

E-Print Network (OSTI)

generators and wind farms based on double feed induction generators (DFIG). Based on an appropriate DFIG wind on system stability of replacing conventional generation by DFIG-based wind generation on the IEEE 14-bus that the oscillatory behavior associated with the dominant mode of the synchronous generator is improved when the DFIG

Cañizares, Claudio A.

222

A doubly-fed permanent magnet generator for wind turbines  

E-Print Network (OSTI)

Optimum extraction of energy from a wind turbine requires that turbine speed vary with wind speed. Existing solutions to produce constant-frequency electrical output under windspeed variations are undesirable due to ...

Thomas, Andrew J. (Andrew Joseph), 1981-

2004-01-01T23:59:59.000Z

223

Observations of Directional Relaxation of Wind Sea Spectra  

Science Conference Proceedings (OSTI)

Two-dimensional wave spectra were acquired through a NOAA Experimental Research Buoy in 34 m of water off the North Carolina coast (Atlantic Ocean). These are analyzed in ideal wave-growth situations and under rapidly turning winds. The ...

J. H. Allender; J. Albrecht; G. Hamilton

1983-08-01T23:59:59.000Z

224

Evaluation of the Effectiveness of Automatic Generation Control (AGC) Alterations for Improved Control with Significant Wind Generation  

Science Conference Proceedings (OSTI)

Wind power represents a significant fraction of the total generation capacity of the Hawaii Electric Light Company (HELCO) system, and HELCO system operators have observed instances where the short-term variability of the existing wind generation has resulted in increased frequency fluctuations. The existing automatic generation control (AGC) system has sometimes exacerbated these frequency fluctuations. To deal with this problem, HELCO contracted with AREVA to implement functional changes to the existin...

2009-05-26T23:59:59.000Z

225

Wind energy | Open Energy Information  

Open Energy Info (EERE)

(Redirected from Wind) (Redirected from Wind) Jump to: navigation, search Wind energy is a form of solar energy.[1] Wind energy (or wind power) describes the process by which wind is used to generate electricity. Wind turbines convert the kinetic energy in the wind into mechanical power. A generator can convert mechanical power into electricity[2]. Mechanical power can also be utilized directly for specific tasks such as pumping water. The US DOE developed a short wind power animation that provides an overview of how a wind turbine works and describes the wind resources in the United States. Contents 1 Wind Energy Basics 1.1 Equation for Wind Power 2 DOE Wind Programs and Information 3 Worldwide Installed Capacity 3.1 United States Installed Capacity 4 Wind Farm Development 4.1 Land Requirements

226

Low temperature Direct Use Geothermal Facilities Contains generating  

Open Energy Info (EERE)

Low temperature Direct Use Geothermal Facilities Contains generating capacity information for low temperature direct use geothermal facilities by state.
2010-08-10T17:02:22Z...

227

Development of laboratory doubly fed induction generator for wind energy research.  

E-Print Network (OSTI)

??This thesis studies the basic concept of doubly-fed induction generators (DFIG) and develops a laboratory model to simulate DFIG wind turbine generators (WTG). Doubly-fed refers (more)

Hu, Zhouxing

2010-01-01T23:59:59.000Z

228

Optimal Sizing of a Stand-alone Wind/Photovoltaic Generation Unit using Particle Swarm Optimization  

Science Conference Proceedings (OSTI)

A hybrid wind/photovoltaic generation system is designed to supply power demand. The aim of this design is minimization of the overall cost of the generation scheme over 20 years of operation. Full demand supply is modeled as constraint for optimization ... Keywords: genetic algorithm, optimal sizing, particle swarm optimization, photovoltaic, wind energy

Ali Kashefi Kaviani; Hamid Reza Baghaee; Gholam Hossein Riahy

2009-02-01T23:59:59.000Z

229

Transient States of the Multiscalar Controlled Double Fed Induction Generator in the Wind Farm  

Science Conference Proceedings (OSTI)

This article presents a detailed model and analysis of wind turbine based on double fed induction generator (DFIG) including cable line to the point of common coupling (PCC). The vector control system is based on the multiscalar model of the machine. ... Keywords: Double Fed Induction Generator, Multiscalar Control, Reactive Power Compensation, Wind Farm Modelling

Piotr Kolodziejek

2011-12-01T23:59:59.000Z

230

Investigation of Enabling Wind Generations Employing Plug-in Hybrid Electric Vehicles  

E-Print Network (OSTI)

1 Investigation of Enabling Wind Generations Employing Plug-in Hybrid Electric Vehicles Mahdi challenges such as mitigating variability. Plug-in hybrid Electric Vehicles (PHEVs) have been considered the variability in wind generation could be to use a fleet of Plug-in Hybrid Electric Vehicles (PHEVs

231

Evaluation of Global Onshore Wind Energy Potential and Generation Costs  

SciTech Connect

In this study, we develop an updated global estimate of onshore wind energy potential using reanalysis wind speed data, along with updated wind turbine technology performance and cost assumptions as well as explicit consideration of transmission distance in the calculation of transmission costs. We find that wind has the potential to supply a significant portion of world energy needs, although this potential varies substantially by region as well as with assumptions such as on what types of land can be used to site wind farms. Total global wind potential under central assumptions is estimated to be approximately 89 petawatt hours per year at less than 9 cents/kWh with substantial regional variations. One limitation of global wind analyses is that the resolution of current global wind speed reanalysis data can result in an underestimate of high wind areas. A sensitivity analysis of eight key parameters is presented. Wind potential is sensitive to a number of input parameters, particularly those related to land suitability and turbine density as well as cost and financing assumptions which have important policy implications. Transmission cost has a relatively small impact on total wind costs, changing the potential at a given cost by 20-30%. As a result of sensitivities studied here we suggest that further research intended to inform wind supply curve development focus not purely on physical science, such as better resolved wind maps, but also on these less well-defined factors, such as land-suitability, that will also have an impact on the long-term role of wind power.

Zhou, Yuyu; Luckow, Patrick; Smith, Steven J.; Clarke, Leon E.

2012-06-20T23:59:59.000Z

232

Wind Turbine Generator System Power Performance Test Report for the Entegrity EW50 Wind Turbine  

DOE Green Energy (OSTI)

Report on the results of the power performance test that the National Renewable Energy Laboratory (NREL) conducted on Entegrity Wind System Inc.'s EW50 small wind turbine.

Smith, J.; Huskey, A.; Jager, D.; Hur, J.

2011-05-01T23:59:59.000Z

233

Effect of generalized wind characteristics on annual power estimates from wind turbine generators  

SciTech Connect

A technique is presented for estimating the average power output of a wind turbine using, as the wind characteristic input, only the mean annual wind magnitude. Hourly wind speeds are assumed to have a Rayleigh frequency distribution which requires a single parameter input (e.g., the mean value, variance or higher moment values). Based upon a general shape, for the wind speed versus machine output, a generic set of curves is developed to estimate the average power output of wind turbines. Also, estimates of the percent of time the wind turbine would not produce power (percent down time) and the percent of time the wind turbine would be operating at its rated power are presented.

Cliff, W.C.

1977-10-01T23:59:59.000Z

234

Standard Deviations of Wind Speed and Direction from Observations over a Smooth Surface  

Science Conference Proceedings (OSTI)

Measurements of wind speed and direction made every minute on a 15 m mast sited on a large expanse of sea ice were analyzed to study the behavior of their standard deviation. The large scatter normally observed under low wind speed and/or non-...

Sylvain M. Joffre; Tuomas Laurila

1988-05-01T23:59:59.000Z

235

Problems with the Current Definitions of the Standard Deviation of Wind Direction  

Science Conference Proceedings (OSTI)

Much of the ongoing debate about how to define the standard deviation of wind direction can be attributed to the widespread implementation of a faulty method of defining it in wind-measuring instrumentation in the previous decade. In this paper, ...

N. I. Fisher

1987-11-01T23:59:59.000Z

236

Wind for Schools: Developing Education Programs to Train the Next Generation of the Wind Energy Workforce  

DOE Green Energy (OSTI)

This paper provides an overview of the Wind for Schools project elements, including a description of host and collegiate school curricula developed for wind energy and the status of the current projects. The paper also provides focused information on how schools, regions, or countries can become involved or implement similar projects to expand the social acceptance and understanding of wind energy.

Baring-Gould, I.; Flowers, L.; Kelly, M.; Barnett, L.; Miles, J.

2009-08-01T23:59:59.000Z

237

Candidate wind turbine generator site annual data summary for January 1980 through December 1980  

DOE Green Energy (OSTI)

Summarized hourly meteorological data for fourteen candidate and wind turbine generator sites are presented in this report. These data are collected for the Department of Energy for the purpose of evaluating the wind energy potential at these sites and are used to assist in selection of potential sites for installation and testing of large wind turbines in electric utility systems. For each site, data are given in eight tables and one figure. Use of information from these tables, with information about specific wind turbines, should allow the user to estimate the potential for wind energy production at each site.

Sandusky, W.F.; Renne, D.S.

1981-04-01T23:59:59.000Z

238

Candidate wind turbine generator site annual data summary for January 1979 through December 1979  

DOE Green Energy (OSTI)

Summarized hourly meteorological data for fifteen candidate and wind turbine generator sites are presented in this report. These data are collected for the Department of Energy for the purpose of evaluating the wind energy potential at these sites and are used to assist in selection of potential sites for installation and testing of large wind turbines in electric utility systems. For each site, data are given in eight tables and one figure. Use of information from these tables, with information about specific wind turbines, should allow the user to estimate the potential for wind energy production at each site.

Sandusky, W.F.; Renne, D.S.

1981-03-01T23:59:59.000Z

239

Nocturnal Wind Direction Shear and Its Potential Impact on Pollutant Transport  

Science Conference Proceedings (OSTI)

The potential effects of vertical wind direction shear on pollutant transport at a complicated, semiarid site are examined using tower measurements. This high-elevation site is situated on a sloping plateau between mountains to the west and a ...

Brent M. Bowen; Jeffrey A. Baars; Gregory L. Stone

2000-03-01T23:59:59.000Z

240

Wind Direction Dependence of Atmospheric Boundary Layer Turbulence Parameters in the Urban Roughness Sublayer  

Science Conference Proceedings (OSTI)

A variety of atmospheric boundary layer parameters are examined as a function of wind direction in both urban and suburban settings in Oklahoma City, Oklahoma, derived from measurements during the Joint Urban 2003 field campaign. Heterogeneous ...

Cheryl Klipp

2007-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "direct wind generator" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Offshore-Directed Winds in the Vicinity of Prince William Sound, Alaska  

Science Conference Proceedings (OSTI)

The thermal contrast between cold air over continental Alaska and relatively warm marine air over the Gulf of Alaska causes frequent, low-level, offshore-directed winds over the south-central Alaskan coast during the cold season. Coastal ...

S. Allen Macklin; Gary M. Lackmann; Judith Gray

1988-06-01T23:59:59.000Z

242

On the Algorithms Used to Compute the Standard Deviation of Wind Direction  

Science Conference Proceedings (OSTI)

The standard deviation of wind direction is a very important quantity in meteorology because in addition to being used to determine the dry deposition rate and the atmospheric stability class, it is also employed in the determination of the rate ...

Pierre S. Farrugia; James L. Borg; Alfred Micallef

2009-10-01T23:59:59.000Z

243

Advanced Wind Turbine Program Next Generation Turbine Development Project: June 17, 1997--April 30, 2005  

Science Conference Proceedings (OSTI)

This document reports the technical results of the Next Generation Turbine Development Project conducted by GE Wind Energy LLC. This project is jointly funded by GE and the U.S. Department of Energy's National Renewable Energy Laboratory.The goal of this project is for DOE to assist the U.S. wind industry in exploring new concepts and applications of cutting-edge technology in pursuit of the specific objective of developing a wind turbine that can generate electricity at a levelized cost of energy of $0.025/kWh at sites with an average wind speed of 15 mph (at 10 m height).

GE Wind Energy, LLC

2006-05-01T23:59:59.000Z

244

Direct charge radioisotope activation and power generation  

DOE Patents (OSTI)

An activator has a base on which is mounted an elastically deformable micromechanical element that has a section that is free to be displaced toward the base. An absorber of radioactively emitted particles is formed on the base or the displaceable section of the deformable element and a source is formed on the other of the displaceable section or the base facing the absorber across a small gap. The radioactive source emits charged particles such as electrons, resulting in a buildup of charge on the absorber, drawing the absorber and source together and storing mechanical energy as the deformable element is bent. When the force between the absorber and the source is sufficient to bring the absorber into effective electrical contact with the source, discharge of the charge between the source and absorber allows the deformable element to spring back, releasing the mechanical energy stored in the element. An electrical generator such as a piezoelectric transducer may be secured to the deformable element to convert the released mechanical energy to electrical energy that can be used to provide power to electronic circuits.

Lal, Amit (Madison, WI); Li, Hui (Madison, WI); Blanchard, James P. (Madison, WI); Henderson, Douglass L. (Madison, WI)

2002-01-01T23:59:59.000Z

245

Proof-of-Concept Manufacturing and Testing of Composite Wind Generator Blades Made by HCBMP (High Compression Bladder Molded Prepreg)  

DOE Green Energy (OSTI)

Proof-of-Concept Manufacturing and Testing of Composite Wind Generator Blades Made by HCBMP (High Compression Bladder Molded Prepreg)

William C. Leighty; DOE Project Officer - Keith Bennett

2005-10-04T23:59:59.000Z

246

Controlled operation of variable speed driven permanent magnet synchronous generator for wind energy conversion systems  

Science Conference Proceedings (OSTI)

The introduction of distributed generation through renewable sources of energy has opened a challenging area for power engineers. As these sources are intermittent in nature, variable speed electric generators are employed for harnessing electrical energy ... Keywords: permanent magnet synchronous generator, power conditioners, power quality, variable speed generators, wind energy

Rajveer Mittal; K. S. Sandhu; D. K. Jain

2009-02-01T23:59:59.000Z

247

ANEMOS: Development of a Next Generation Wind Power  

E-Print Network (OSTI)

This paper presents the objectives and the research work carried out in the frame of the ANEMOS project on short-term wind power forecasting. The aim of the project is to develop accurate models that substantially outperform current state-of-the-art methods, for onshore and offshore wind power forecasting, exploiting both statistical and physical modeling approaches. The project focus on prediction horizons up to 48 hours ahead and investigates predictability of wind for higher horizons up to 7 days ahead useful i.e. for maintenance scheduling. Emphasis is given on the integration of highresolution meteorological forecasts. For the offshore case, marine meteorology is considered as well as information by satellite-radar images. An integrated software platform, `ANEMOS', is developed to host the various models. This system will be installed by several utilities for on-line operation at onshore and offshore wind farms for prediction at a local, regional and national scale. The applications include different terrain types and wind climates, on- and offshore cases, and interconnected or island grids. The on-line operation by the utilities will allow validation of the models and an analysis of the value of wind prediction for a competitive integration of wind energy in the developing liberalized electricity markets in the EU.

Forecasting System For; G. Kariniotakis; J. Ottavi; U. Focken; M. Lange; J. Kintxo; J. Usaola; I. Sanchez; D. Mccoy; I. Marti H. Madsen; M. Collmann; A. Gig; G. Gonzales

2003-01-01T23:59:59.000Z

248

Application of genetic algorithm to improve voltage regulation of self-excited induction generator in a wind energy conversion system  

Science Conference Proceedings (OSTI)

Self-excited induction generators have been found to be most suitable for wind energy conversion in remote locations. In this paper, an attempt has been made to improve the voltage regulation of self-excited induction generator (SEIG) using series compensation. ... Keywords: genetic algorithms, intelligent systems, modelling, renewable energy, self-excited induction generators, simulation, voltage regulation, wind energy conversion systems, wind power

Dheeraj Joshi; K. S. Sandhu; M. K. Soni

2007-02-01T23:59:59.000Z

249

Preliminary Evaluation of a Multiple-Generator Drive-Train Configuration for Wind Turbines: Preprint  

DOE Green Energy (OSTI)

The recent trend toward large wind turbines has led to very expensive gearboxes that hinder their feasibility. The gearboxes for these wind turbines are more expensive per kilowatt (kW) of rated power than for smaller turbines because the torque increases more quickly than the power when increasing the rotor diameter. Multiple-generator drivetrain configurations can reduce the drivetrain cost for large wind turbines while increasing the energy capture and reliability. The National Renewable Energy Laboratory (NREL) is reexamining the benefits of multiple-generator configurations through the Wind Partnership for Advanced Component Technology (WindPACT) program. This paper qualitatively compares a multiple-generator drivetrain configuration to a conventional drivetrain.

Cotrell, J.

2002-01-01T23:59:59.000Z

250

Low-Cost Superconducting Wire for Wind Generators: High Performance, Low Cost Superconducting Wires and Coils for High Power Wind Generators  

SciTech Connect

REACT Project: The University of Houston will develop a low-cost, high-current superconducting wire that could be used in high-power wind generators. Superconducting wire currently transports 600 times more electric current than a similarly sized copper wire, but is significantly more expensive. The University of Houstons innovation is based on engineering nanoscale defects in the superconducting film. This could quadruple the current relative to todays superconducting wires, supporting the same amount of current using 25% of the material. This would make wind generators lighter, more powerful and more efficient. The design could result in a several-fold reduction in wire costs and enable their commercial viability of high-power wind generators for use in offshore applications.

None

2012-01-01T23:59:59.000Z

251

Wind Turbine Generator System Power Performance Test Report for the Gaia-Wind 11-kW Wind Turbine  

DOE Green Energy (OSTI)

This test was conducted as part of the U.S. Department of Energy's (DOE) Independent Testing project. It is a power performance test that the National Renewable Energy Laboratory (NREL) conducted on the Gaia-Wind 11-kW small wind turbine.

Huskey, A.; Bowen, A.; Jager, D.

2009-12-01T23:59:59.000Z

252

Wind Turbine Generator System Power Performance Test Report for the Gaia-Wind 11-kW Wind Turbine  

SciTech Connect

This test was conducted as part of the U.S. Department of Energy's (DOE) Independent Testing project. It is a power performance test that the National Renewable Energy Laboratory (NREL) conducted on the Gaia-Wind 11-kW small wind turbine.

Huskey, A.; Bowen, A.; Jager, D.

2009-12-01T23:59:59.000Z

253

Rotor power feedback control of wind turbine system doubly-fed induction generator  

Science Conference Proceedings (OSTI)

The paper deals with a new system of wind turbine active power vector control. The already familiar cascade regulation with internal vector component feedback of rotor current and external active and reactive power feedbacks control of wind turbine has ... Keywords: DFIG rotor power regulator, doubly-fed induction generator, simulation, vector control

J. Smajo

2006-09-01T23:59:59.000Z

254

Wind Turbines Condition Monitoring and Fault Diagnosis Using Generator Current Amplitude  

E-Print Network (OSTI)

detection in a Doubly-Fed Induction Generator (DFIG) based wind turbine for stationary and nonstationary cases. Index Terms--Wind turbine, DFIG, fault detection, diagnosis, amplitude modulation, Hilbert and maintaining older system, becomes more costly and challenging with obsolescence of key components. DFIG

Paris-Sud XI, Université de

255

Using coalitions of wind generators and electric vehicles for effective energy market participation  

Science Conference Proceedings (OSTI)

Wind power is becoming a significant source of electricity in many countries. However, the inherent uncertainty of wind generators does not allow them to participate in the forward electricity markets. In this paper, we foster a tighter integration of ... Keywords: coalition formation, energy and emissions, organisations

Matteo Vasirani; Sascha Ossowski; Ramachandra Kota; Renato L. G. Cavalcante; Nicholas R. Jennings

2011-05-01T23:59:59.000Z

256

Molldeing and Simulation of a Small-Scale Wind Turbine Generator in Isolated Distribution Network  

Science Conference Proceedings (OSTI)

In recent years, the wind energy capacity is rapidly increasing in importance as a share of electricity supply on worldwide basis. A small-scale wind turbine generator is usually installed in an isolated distribution network. This paper aims to justzjj ...

2007-09-01T23:59:59.000Z

257

Strategic evaluation of research and development into embedded energy storage in wind power generation  

Science Conference Proceedings (OSTI)

Embedded Energy Storage (EES) is an innovative idea presented in a previous paper. EES is associated with some major configurations of wind power generation and rechargeable batteries. Areas for further research are identified, but before resources are ... Keywords: embedded energy storage, power system, wind power

T. C. Yang; Lixiong Li

2010-09-01T23:59:59.000Z

258

Reliability analysis of fault tolerant wind energy conversion system with doubly fed induction generator  

Science Conference Proceedings (OSTI)

This paper deals with the design of a reliable fault tolerant converter topology for grid connected Wind Energy Conversion System (WECS) with Double Fed Induction Generator (DFIG) based on functional redundancy. The main contribution of the developed ... Keywords: Markov chain model, fault tolerant system, reliability analysis, wind energy conversion system

Philippe Weber; Florent Becker; Antoine Mathias; Didier Theilliol; Youmin M. Zhang

2012-10-01T23:59:59.000Z

259

Power System Modeling of 20percent Wind-Generated Electricity by 2030  

E-Print Network (OSTI)

Price Reduction Offsetting demand for natural gas in the electricity sector by increasing wind energyprice reductions, and water savings. Index Termspower system modeling, wind energywind energy to offset coal- and natural gas-based electricity generation analyzed here include decreased natural gas prices,

Hand, Maureen

2008-01-01T23:59:59.000Z

260

Applying fuzzy engineering economics to evaluate project investment feasibility of wind generation  

Science Conference Proceedings (OSTI)

In this paper, a fuzzy engineering economic decision model is derived to evaluate the investment feasibility of wind generation project. A straightforward vertex parameters' fuzzy mathematics operation using the function principle is derived as an alternative ... Keywords: decision-making, function principle, fuzzy mathematics, fuzzy ranking, mellin transform, wind electricity

J. N. Sheen

2009-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "direct wind generator" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

An Automatic Load Sharing Approach for a DFIG Based Wind Generator in a Microgrid  

E-Print Network (OSTI)

An Automatic Load Sharing Approach for a DFIG Based Wind Generator in a Microgrid M. A. Barik and H.ravishankar@unsw.edu.au Abstract--The aim of this paper is to manage the load variation of a microgrid by controlling the wind by simulating a benchmark microgrid test system. Simulation results show that the proposed control scheme

Pota, Himanshu Roy

262

Do Wind Forecasts Make Good Generation Schedules? Preprint  

SciTech Connect

Energy market scheduling conventions can needlessly increase the wind balancing area's regulation requirements. This economic inefficiency can be eliminated once it is recognized. The paper provides a detailed discussion of these issues.

Dragoon, K.; Kirby, B.; Milligan, M.

2008-06-01T23:59:59.000Z

263

Managing Wind-based Electricity Generation and Storage  

E-Print Network (OSTI)

on renewable energy, and to develop efficient electricity storage. Renewable energy--such as wind energy. However, most renewable energy is inh, who is extremely instrumental in guiding my research on energy. His insights have significantly

264

Do Wind Forecasts Make Good Generation Schedules? Preprint  

DOE Green Energy (OSTI)

Energy market scheduling conventions can needlessly increase the wind balancing area's regulation requirements. This economic inefficiency can be eliminated once it is recognized. The paper provides a detailed discussion of these issues.

Dragoon, K.; Kirby, B.; Milligan, M.

2008-06-01T23:59:59.000Z

265

Economic modeling of intermittency in wind power generation  

E-Print Network (OSTI)

The electricity sector is a major source of carbon dioxide emissions that contribute to global climate change. Over the past decade wind energy has steadily emerged as a potential source for large-scale, low carbon energy. ...

Cheng, Alan Yung Chen

2005-01-01T23:59:59.000Z

266

Wind Energy: From Coast to Coast, Wind Turbines are Generating Electricity  

Energy.gov (U.S. Department of Energy (DOE))

Fact sheet describes wind energy costs that have declined dramatically during the past decade. Both stand-alone and grid-connected applications (groups of wind turbines that feed into a central power-distribution grid) are covered in this fact sheet.

267

Wind Power | Open Energy Information  

Open Energy Info (EERE)

Wind Power Wind Power Jump to: navigation, search Wind Power WIndfarm.Sunset.jpg Wind power is a form of solar energy.[1] Wind is caused by the uneven heating of the atmosphere by the sun, variations in the earth's surface, and rotation of the earth. Mountains, bodies of water, and vegetation all influence wind flow patterns[2], [3]. Wind energy (or wind power) describes the process by which wind is used to generate electricity. Wind turbines convert the energy in wind to electricity by rotating propeller-like blades around a rotor. The rotor turns the drive shaft, which turns an electric generator.[2] Three key factors affect the amount of energy a turbine can harness from the wind: wind speed, air density, and swept area.[4] Mechanical power can also be utilized directly for specific tasks such as

268

Anemometer Data (Wind Speed, Direction) for Pascua Yaqui, AZ (2003 - 2004)  

Open Energy Info (EERE)

Pascua Yaqui, AZ (2003 - 2004) Pascua Yaqui, AZ (2003 - 2004) Dataset Summary Description Wind data collected from Pascua Yaqui Indian Reservation in Arizona from an anemometer as part of the Native American anemometer loan program. Monthly mean wind speed is available for 2003 through 2004, as is wind direction and turbulence data. Data is reported from a height of 20 m. The data was originally made available by Wind Powering America, a DOE Office of Energy Efficiency & Renewable Energy (EERE) program. A dynamic map displaying all available data from DOE anemometer loan programs is available http://www.windpoweringamerica.gov/anemometerloans/projects.asp. Source EERE Date Released December 02nd, 2010 (3 years ago) Date Updated December 02nd, 2010 (3 years ago) Keywords wind

269

Anemometer Data (Wind Speed, Direction) for Quinault #3, WA (2004 - 2005) |  

Open Energy Info (EERE)

Quinault #3, WA (2004 - 2005) Quinault #3, WA (2004 - 2005) Dataset Summary Description Wind data collected from Quinault Indian Reservation in Washington from an anemometer as part of the Native American anemometer loan program. Monthly mean wind speed is available for 2004 through 2005, as is wind direction and turbulence data. Data is reported from a height of 20 m. The data was originally made available by Wind Powering America, a DOE Office of Energy Efficiency & Renewable Energy (EERE) program. A dynamic map displaying all available data from DOE anemometer loan programs is available http://www.windpoweringamerica.gov/anemometerloans/projects.asp. Source EERE Date Released December 02nd, 2010 (4 years ago) Date Updated December 02nd, 2010 (4 years ago) Keywords wind

270

Evaluation of Several Single-Pass Estimators of the Mean and the Standard Deviation of Wind Direction  

Science Conference Proceedings (OSTI)

Proposed single-pass methods for estimating the mean (D?) and the standard deviation (?d) of wind direction and other problems in wind statistics have been evaluated using extensive field data. It can be concluded that Mardia's methods for ...

Yukihiro Mori

1986-10-01T23:59:59.000Z

271

ERCOT's Dynamic Model of Wind Turbine Generators: Preprint  

SciTech Connect

By the end of 2003, the total installed wind farm capacity in the Electric Reliability Council of Texas (ERCOT) system was approximately 1 gigawatt (GW) and the total in the United States was about 5 GW. As the number of wind turbines installed throughout the United States increases, there is a greater need for dynamic wind turbine generator models that can properly model entire power systems for different types of analysis. This paper describes the ERCOT dynamic models and simulations of a simple network with different types of wind turbine models currently available.

Muljadi, E.; Butterfield, C. P.; Conto, J.; Donoho, K.

2005-08-01T23:59:59.000Z

272

Making the Economic Case for Small-Scale Distributed Wind -- A Screening for Distributed Generation Wind Opportunities: Preprint  

DOE Green Energy (OSTI)

This study was an offshoot of a previous assessment, which examined the potential for large-scale, greater than 50 MW, wind development on occupied federal agency lands. The study did not find significant commercial wind development opportunities, primarily because of poor wind resource on available and appropriately sized land areas or land use or aesthetic concerns. The few sites that could accommodate a large wind farm failed to have transmission lines in optimum locations required to generate power at competitive wholesale prices. The study did identify a promising but less common distributed generation (DG) development option. This follow-up study documents the NREL/Global Energy Concepts team efforts to identify economic DG wind projects at a select group of occupied federal sites. It employs a screening strategy based on project economics that go beyond quantity of windy land to include state and utility incentives as well as the value of avoided power purchases. It attempts to account for the extra costs and difficulties associated with small projects through the use of project scenarios that are more compatible with federal facilities and existing land uses. These benefits and barriers of DG are discussed, and the screening methodology and results are included. The report concludes with generalizations about the screening method and recommendations for improvement and other potential applications for this methodology.

Kandt, A.; Brown, E.; Dominick, J.; Jurotich, T.

2007-06-01T23:59:59.000Z

273

Wind Turbine Generator System Duration Test Report for the Gaia-Wind 11 kW Wind Turbine  

DOE Green Energy (OSTI)

This test was conducted as part of the U.S. Department of Energy's (DOE) Independent Testing project. This project was established to help reduce the barriers of wind energy expansion by providing independent testing results for small turbines. In total, five turbines are being tested at the National Renewable Energy Laboratory's (NRELs) National Wind Technology Center (NWTC) as a part of this project. Duration testing is one of up to five tests that may be performed on the turbines, including power performance, safety and function, noise, and power quality tests. The results of the testing will provide the manufacturers with reports that may be used for small wind turbine certification. The test equipment includes a Gaia-Wind 11 kW wind turbine mounted on an 18 m monopole tower. Gaia-Wind Ltd. manufactured the turbine in Denmark, although the company is based in Scotland. The system was installed by the NWTC Site Operations group with guidance and assistance from Gaia-Wind.

Huskey, A.; Bowen, A.; Jager, D.

2010-09-01T23:59:59.000Z

274

Single-phase Converter-less Excitation Synchronous Stand-along Wind Power Generator System.  

E-Print Network (OSTI)

??In this thesis, a single-phase converter-less excitation synchronous stand-along wind power generator system is proposed. In order to simplify the system and improve the system (more)

Lin, Chin-wei

2013-01-01T23:59:59.000Z

275

Impacts of Wind and Solar on Fossil-Fueled Generators: Preprint  

NLE Websites -- All DOE Office Websites (Extended Search)

Impacts of Wind and Solar on Fossil-Fueled Generators Preprint D. Lew and G. Brinkman National Renewable Energy Laboratory N. Kumar, P. Besuner, D. Agan, and S. Lefton Intertek...

276

If I generate 20 percent of my national electricity from wind...  

Open Energy Info (EERE)

of generating 20 percent of my total capacity from say wind? And all of it replaces coal powered electricty ? What happended to GDP ? Is the economy a net gain or net loss ?...

277

A Two-Dimensional Model of Inertial Oscillations Generated by a Propagating Wind Field  

Science Conference Proceedings (OSTI)

A linear, two-dimensional, continuously stratified, viscous model has been developed to study the inertial oscillations generated by a propagating wind field. The model, an extension of that of Kundu and Thomson, includes the presence of a coast ...

Pijush K. Kundu

1986-08-01T23:59:59.000Z

278

An Operational System for Predicting Hurricane-Generated Wind Waves in the North Atlantic Ocean  

Science Conference Proceedings (OSTI)

A new windwave prediction model, referred to as the North Atlantic hurricane (NAH) wave model, has been developed at the National Centers for Environmental Prediction (NCEP) to produce forecasts of hurricane-generated waves during the Atlantic ...

Yung Y. Chao; Jose-Henrique G. M. Alves; Hendrik L. Tolman

2005-08-01T23:59:59.000Z

279

Effects of Tropospheric Wind Shear on the Spectrum of Convectively Generated Gravity Waves  

Science Conference Proceedings (OSTI)

The authors examine the effects of tropospheric wind shear on the phase speed spectrum of gravity waves generated by tropical convection. A two-dimensional cloud-resolving model is used to perform numerous squall line simulations with the ...

Jadwiga H. Beres; M. Joan Alexander; James R. Holton

2002-06-01T23:59:59.000Z

280

Wind Turbine Generator System Power Quality Test Report for the Gaia Wind 11-kW Wind Turbine  

DOE Green Energy (OSTI)

This report details the power quality test on the Gaia Wind 11-kW Wind Turbine as part of the U.S. Department of Energy's Independent Testing Project. In total five turbines are being tested as part of the project. Power quality testing is one of up to five test that may be performed on the turbines including power performance, safety and function, noise, and duration tests. The results of the testing provide manufacturers with reports that may be used for small wind turbine certification.

Curtis, A.; Gevorgian, V.

2011-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "direct wind generator" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Operational-Condition-Independent Criteria Dedicated to Monitoring Wind Turbine Generators: Preprint  

DOE Green Energy (OSTI)

To date the existing wind turbine condition monitoring technologies and commercially available systems have not been fully accepted for improving wind turbine availability and reducing their operation and maintenance costs. One of the main reasons is that wind turbines are subject to constantly varying loads and operate at variable rotational speeds. As a consequence, the influences of turbine faults and the effects of varying load and speed are coupled together in wind turbine condition monitoring signals. So, there is an urgent need to either introduce some operational condition de-coupling procedures into the current wind turbine condition monitoring techniques or develop a new operational condition independent wind turbine condition monitoring technique to maintain high turbine availability and achieve the expected economic benefits from wind. The purpose of this paper is to develop such a technique. In the paper, three operational condition independent criteria are developed dedicated for monitoring the operation and health condition of wind turbine generators. All proposed criteria have been tested through both simulated and practical experiments. The experiments have shown that these criteria provide a solution for detecting both mechanical and electrical faults occurring in wind turbine generators.

Yang, W.; Sheng, S.; Court, R.

2012-08-01T23:59:59.000Z

282

PIBS 4709eMinistry of the Environment NOISE GUIDELINES FOR WIND FARMS Interpretation for Applying MOE NPC Publications to Wind Power Generation Facilities  

E-Print Network (OSTI)

This document establishes the sound level limits for land-based wind power generating facilities and describes the information required for noise assessments and submissions under the Environmental

Ministry Of The Environment

2008-01-01T23:59:59.000Z

283

Portfolio Revenues in a Changing Power Infrastructure: Responses of Existing Generation to New Wind Capacity  

Science Conference Proceedings (OSTI)

Owners of generating units must frequently reevaluate the financial and physical operations of their units in order to assess impacts of changing business regulatory conditions and to consider how investments to improve efficiency, flexibility, and emissions will perform. A little understood development now occurring is growth in wind capacity in response to state renewable performance standards. This report describes a case study of how new wind generation can affect the revenues and operation of existi...

2004-12-27T23:59:59.000Z

284

Capacity Value of PV and Wind Generation in the NV Energy System  

Science Conference Proceedings (OSTI)

Calculation of photovoltaic (PV) and wind power capacity values is important for estimating additional load that can be served by new PV or wind installations in the electrical power system. It also is the basis for assigning capacity credit payments in systems with markets. Because of variability in solar and wind resources, PV and wind generation contribute to power system resource adequacy differently from conventional generation. Many different approaches to calculating PV and wind generation capacity values have been used by utilities and transmission operators. Using the NV Energy system as a study case, this report applies peak-period capacity factor (PPCF) and effective load carrying capability (ELCC) methods to calculate capacity values for renewable energy sources. We show the connection between the PPCF and ELCC methods in the process of deriving a simplified approach that approximates the ELCC method. This simplified approach does not require generation fleet data and provides the theoretical basis for a quick check on capacity value results of PV and wind generation. The diminishing return of capacity benefit as renewable generation increases is conveniently explained using the simplified capacity value approach.

Lu, Shuai; Diao, Ruisheng; Samaan, Nader A.; Etingov, Pavel V.

2012-09-01T23:59:59.000Z

285

An Optimized Autoregressive Forecast Error Generator for Wind and Load Uncertainty Study  

SciTech Connect

This paper presents a first-order autoregressive algorithm to generate real-time (RT), hour-ahead (HA), and day-ahead (DA) wind and load forecast errors. The methodology aims at producing random wind and load forecast time series reflecting the autocorrelation and cross-correlation of historical forecast data sets. Five statistical characteristics are considered: the means, standard deviations, autocorrelations, and cross-correlations. A stochastic optimization routine is developed to minimize the differences between the statistical characteristics of the generated time series and the targeted ones. An optimal set of parameters are obtained and used to produce the RT, HA, and DA forecasts in due order of succession. This method, although implemented as the first-order regressive random forecast error generator, can be extended to higher-order. Results show that the methodology produces random series with desired statistics derived from real data sets provided by the California Independent System Operator (CAISO). The wind and load forecast error generator is currently used in wind integration studies to generate wind and load inputs for stochastic planning processes. Our future studies will focus on reflecting the diurnal and seasonal differences of the wind and load statistics and implementing them in the random forecast generator.

De Mello, Phillip; Lu, Ning; Makarov, Yuri V.

2011-01-17T23:59:59.000Z

286

Wind Turbine Generator System Duration Test Report for the Mariah Power Windspire Wind Turbine  

Science Conference Proceedings (OSTI)

This test was conducted as part of the U.S. Department of Energy's (DOE) Independent Testing project to help reduce the barriers of wind energy expansion by providing independent testing results for small turbines. In total, five turbines are being tested at the National Wind Technology Center (NWTC) as a part of the first round of this project. Duration testing is one of up to five tests that may be performed on the turbines. Other tests include power performance, safety and function, noise, and power quality tests. NWTC testing results provide manufacturers with reports that may be used to meet part of small wind turbine certification requirements. This duration test report focuses on the Mariah Power Windspire wind turbine.

Huskey, A.; Bowen, A.; Jager, D.

2010-05-01T23:59:59.000Z

287

Wind Energy Management System EMS Integration Project: Incorporating Wind Generation and Load Forecast Uncertainties into Power Grid Operations  

SciTech Connect

The power system balancing process, which includes the scheduling, real time dispatch (load following) and regulation processes, is traditionally based on deterministic models. Since the conventional generation needs time to be committed and dispatched to a desired megawatt level, the scheduling and load following processes use load and wind and solar power production forecasts to achieve future balance between the conventional generation and energy storage on the one side, and system load, intermittent resources (such as wind and solar generation), and scheduled interchange on the other side. Although in real life the forecasting procedures imply some uncertainty around the load and wind/solar forecasts (caused by forecast errors), only their mean values are actually used in the generation dispatch and commitment procedures. Since the actual load and intermittent generation can deviate from their forecasts, it becomes increasingly unclear (especially, with the increasing penetration of renewable resources) whether the system would be actually able to meet the conventional generation requirements within the look-ahead horizon, what the additional balancing efforts would be needed as we get closer to the real time, and what additional costs would be incurred by those needs. To improve the system control performance characteristics, maintain system reliability, and minimize expenses related to the system balancing functions, it becomes necessary to incorporate the predicted uncertainty ranges into the scheduling, load following, and, in some extent, into the regulation processes. It is also important to address the uncertainty problem comprehensively by including all sources of uncertainty (load, intermittent generation, generators forced outages, etc.) into consideration. All aspects of uncertainty such as the imbalance size (which is the same as capacity needed to mitigate the imbalance) and generation ramping requirement must be taken into account. The latter unique features make this work a significant step forward toward the objective of incorporating of wind, solar, load, and other uncertainties into power system operations. Currently, uncertainties associated with wind and load forecasts, as well as uncertainties associated with random generator outages and unexpected disconnection of supply lines, are not taken into account in power grid operation. Thus, operators have little means to weigh the likelihood and magnitude of upcoming events of power imbalance. In this project, funded by the U.S. Department of Energy (DOE), a framework has been developed for incorporating uncertainties associated with wind and load forecast errors, unpredicted ramps, and forced generation disconnections into the energy management system (EMS) as well as generation dispatch and commitment applications. A new approach to evaluate the uncertainty ranges for the required generation performance envelope including balancing capacity, ramping capability, and ramp duration has been proposed. The approach includes three stages: forecast and actual data acquisition, statistical analysis of retrospective information, and prediction of future grid balancing requirements for specified time horizons and confidence levels. Assessment of the capacity and ramping requirements is performed using a specially developed probabilistic algorithm based on a histogram analysis, incorporating all sources of uncertainties of both continuous (wind and load forecast errors) and discrete (forced generator outages and start-up failures) nature. A new method called the flying brick technique has been developed to evaluate the look-ahead required generation performance envelope for the worst case scenario within a user-specified confidence level. A self-validation algorithm has been developed to validate the accuracy of the confidence intervals.

Makarov, Yuri V.; Huang, Zhenyu; Etingov, Pavel V.; Ma, Jian; Guttromson, Ross T.; Subbarao, Krishnappa; Chakrabarti, Bhujanga B.

2010-01-01T23:59:59.000Z

288

Design of a 3 kW wind turbine generator with thin airfoil blades  

SciTech Connect

Three blades of a 3 kW prototype wind turbine generator were designed with thin airfoil and a tip speed ratio of 3. The wind turbine has been controlled via two control methods: the variable pitch angle and by regulation of the field current of the generator and examined under real wind conditions. The characteristics of the thin airfoil, called ''Seven arcs thin airfoil'' named so because the airfoil is composed of seven circular arcs, are analyzed with the airfoil design and analysis program XFOIL. The thin airfoil blade is designed and calculated by blade element and momentum theory. The performance characteristics of the machine such as rotational speed, generator output as well as stability for wind speed changes are described. In the case of average wind speeds of 10 m/s and a maximum of 19 m/s, the automatically controlled wind turbine ran safely through rough wind conditions and showed an average generator output of 1105 W and a power coefficient 0.14. (author)

Ameku, Kazumasa; Nagai, Baku M.; Roy, Jitendro Nath [Faculty of Mechanical Engineering, University of the Ryukyus, 1 Senbaru, Nishihara-cho, Okinawa 903-0213 (Japan)

2008-09-15T23:59:59.000Z

289

MHK Technologies/Direct Drive Power Generation Buoy | Open Energy  

Open Energy Info (EERE)

Power Generation Buoy Power Generation Buoy < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Direct Drive Power Generation Buoy.jpg Technology Profile Primary Organization Columbia Power Technologies Inc Technology Resource Click here Wave Technology Type Click here Point Absorber - Floating Technology Readiness Level Click here TRL 4 Proof of Concept Technology Description Direct drive point absorber In 2005 Oregon State University entered into an exclusive license agreement with Columbia Power Technologies to jointly develop a direct drive wave energy conversion device Designed to be anchored 2 5 miles off the Oregon coast in 130 feet of water it uses the rise and fall of ocean waves to generate electricity Mooring Configuration Anchored

290

Candidate wind-turbine-generator site summarized meteorological data for December 1976-December 1981. [Program WIND listed  

DOE Green Energy (OSTI)

Summarized hourly meteorological data for 16 of the original 17 candidate and wind turbine generator sites collected during the period from December 1976 through December 1981 are presented. The data collection program at some individual sites may not span this entire period, but will be contained within the reporting period. The purpose of providing the summarized data is to document the data collection program and provide data that could be considered representative of long-term meteorological conditions at each site. For each site, data are given in eight tables and a topographic map showing the location of the meteorological tower and turbine, if applicable. Use of information from these tables, along with information about specific wind turbines, should allow the user to estimate the potential for long-term average wind energy production at each site.

Sandusky, W.F.; Renne, D.S.; Hadley, D.L.

1982-09-01T23:59:59.000Z

291

Wind energy | Open Energy Information  

Open Energy Info (EERE)

energy in the wind into mechanical power. A generator can convert mechanical power into electricity2. Mechanical power can also be utilized directly for specific tasks such as...

292

Hybrid Solar-Wind Generates Savings for South Dakota City | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Hybrid Solar-Wind Generates Savings for South Dakota City Hybrid Solar-Wind Generates Savings for South Dakota City Hybrid Solar-Wind Generates Savings for South Dakota City July 19, 2010 - 4:05pm Addthis What does this project do? The projects will reduce the city's natural gas and electric bills by an estimated $2,700. An array of six solar panels, similar to the ones shown, will be installed at Colton, S.D.'s city hall. | Photo courtesy of Colton. The city of Colton, South Dakota. is a small, agriculturally-based community. So small that Mayor Erik Miller says if his two Labrador retrievers ever got lost, local residents would have no trouble finding them. "Colton is like taking a trip to the past," says Miller. Still, the mayor is looking to create a new energy future for Colton, deploying one small-scale solar and two solar-wind hybrid systems, and

293

If I generate 20 percent of my national electricity from wind and solar -  

Open Energy Info (EERE)

If I generate 20 percent of my national electricity from wind and solar - If I generate 20 percent of my national electricity from wind and solar - what does it do to my GDP and Trade Balance ? Home > Groups > DOE Wind Vision Community I think that the economics of fossil fuesl are well understood. Some gets to find the fuel and sell it. The fuel and all associated activities factor into the economic equation of the nation and the wrold. What is the economics of generating 20 percent of my total capacity from say wind? And all of it replaces coal powered electricty ? What happended to GDP ? Is the economy a net gain or net loss ? The value of the electricity came into the system, but no coal is bought or sold. Submitted by Jamespr on 6 May, 2013 - 17:46 0 answers Groups Menu You must login in order to post into this group.

294

A Methodology for Assessment of Wind Turbine Noise Generation  

E-Print Network (OSTI)

The detailed analysis of a series of acoustic measurements taken near several large wind turbines (100 kWand above) has identified the maximum acoustic energy as being concentrated in the low-frequency audible and subaudible ranges, usually less than 100 Hz. These measurements have also shown any reported community annoyance associated with turbine operations has often been related to the degree of coherent impulsiveness present and the subsequent harmonic coupling of acoustic energy to residential structures. Thus, one technique to assess the annoyance potential of a given wind turbine design is to develop a method which quantifies this degree of impulsiveness or coherency in the radiated acoustic energy spectrum under a wide range of operating conditions. Experience has also shown the presence of annoying conditions is highly time dependent and nonstationary, and, therefore, any attempts to quantify or at least classify wind turbine designs in terms of their noise annoyance potential must be handled within the proper probabilistic framework. A technique is described which employs multidimensional, joint probability analysis to establish the expected coincidence of acoustic energy levels in a contiguous sequence of octave frequency bands which have been chosen because of their relationship to common structural resonant frequencies in residential buildings. Evidence is presented to justify the choice of these particular bands. Comparisons of the acoustic performance and an estimate of the annoyance potential of several large wind turbine designs using this technique is also discussed.

N. D. Kelley; R. R. Hemphill; M. E. Mckenna

1981-01-01T23:59:59.000Z

295

Generation of Coastal Inertial Oscillations by Time-Varying Wind  

Science Conference Proceedings (OSTI)

The excitation of coastal inertial oscillations by a rapidly varying wind is investigated. It is shown that the mean-square response to a completely random forcing is 2 ? ?2dt, where ? is the response to impulsive forcing and the integral ...

Pijush K. Kundu

1984-12-01T23:59:59.000Z

296

The Role of Wind-Generated Mixing in Coastal Upwelling  

Science Conference Proceedings (OSTI)

A simple parameterization of mixing processes originally developed by Kraus and Turner (1967) is included in a two-dimensional, two-layer theory of wind-driven coastal upwelling. Mixed-layer deepening is a competition between entrainment due to ...

R. A. De Szoeke; J. G. Richman

1981-11-01T23:59:59.000Z

297

Ris-R-1205(EN) Conceptual survey of Generators and Power Electronics for Wind Turbines  

E-Print Network (OSTI)

This report presents a survey on generator concepts and power electronic concepts for wind turbines. The report is aimed as a tool for decision-makers and development people with respect to wind turbine manufactures, utilities, and independent system operators as well as manufactures of generators and power electronics. The survey is focused on the electric development of wind turbines and it yields an overview on: State of the art on generators and power electronics. Future concepts and technologies within generators and power electronics. Market needs in the shape of requirements to the grid connection. This survey on generator and power electronic concepts was carried out in cooperation between Aalborg University and Ris National Laboratory, in the scope of the joint research programme Electric Design and Control. The report has been reviewed by:

L. H. Hansen; L. Helle; F. Blaabjerg; E. Ritchie; S. Munk; H. Bindner; P. Srensen; B. Bak-jensen; Anca Daniela; Hansen Peter; Hauge Madsen

2001-01-01T23:59:59.000Z

298

New England Wind Forum: Markets  

Wind Powering America (EERE)

Markets Markets Selling Wind Power Wind generators interconnected directly to the transmission or distribution grid, or sized in excess of the load of a host end-user, interact with either well-developed or developing markets for the products produced by wind generators: electricity and generation attributes. Buying Wind Power Individuals, companies, institutions, and governments throughout New England have a number of opportunities to buying wind power or support the development of wind power. The links below take you to information on opportunities and guidance for buying wind power in New England. Motivations for Buying Wind Power Buying Wind Power Resources and Tools for Large Energy Users Printable Version Skip footer navigation to end of page. New England Wind Forum Home | Wind Program Home | EERE Home | U.S. Department of Energy

299

A Third-Generation Model for Wind Waves on Slowly Varying, Unsteady, and Inhomogeneous Depths and Currents  

Science Conference Proceedings (OSTI)

A full discrete spectral model for propagation generation and dissipation of wind waves for arbitrary depth, current and wind fields is presented (WAVEWATCH). This model incorporates all relevant wave-current interaction mechanisms including ...

Hendrik L. Tolman

1991-06-01T23:59:59.000Z

300

Wind Turbine Generator System Duration Test Report for the ARE 442 Wind Turbine  

DOE Green Energy (OSTI)

This test is being conducted as part of the U.S. Department of Energy's (DOE) Independent Testing project. This project was established to help reduce the barriers of wind energy expansion by providing independent testing results for small turbines. In total, four turbines are being tested at the NWTC as a part of this project. Duration testing is one of up to 5 tests that may be performed on the turbines, including power performance, safety and function, noise, and power quality tests. The results of the testing provide manufacturers with reports that may be used for small wind turbine certification. The test equipment includes a grid connected ARE 442 wind turbine mounted on a 30.5 meter (100 ft) lattice tower manufactured by Abundant Renewable Energy. The system was installed by the NWTC Site Operations group with guidance and assistance from Abundant Renewable Energy.

van Dam, J.; Baker, D.; Jager, D.

2010-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "direct wind generator" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Unit commitment with wind power generation: integrating wind forecast uncertainty and stochastic programming.  

DOE Green Energy (OSTI)

We present a computational framework for integrating the state-of-the-art Weather Research and Forecasting (WRF) model in stochastic unit commitment/energy dispatch formulations that account for wind power uncertainty. We first enhance the WRF model with adjoint sensitivity analysis capabilities and a sampling technique implemented in a distributed-memory parallel computing architecture. We use these capabilities through an ensemble approach to model the uncertainty of the forecast errors. The wind power realizations are exploited through a closed-loop stochastic unit commitment/energy dispatch formulation. We discuss computational issues arising in the implementation of the framework. In addition, we validate the framework using real wind speed data obtained from a set of meteorological stations. We also build a simulated power system to demonstrate the developments.

Constantinescu, E. M.; Zavala, V. M.; Rocklin, M.; Lee, S.; Anitescu, M. (Mathematics and Computer Science); (Univ. of Chicago); (New York Univ.)

2009-10-09T23:59:59.000Z

302

Wind Energy Management System Integration Project Incorporating Wind Generation and Load Forecast Uncertainties into Power Grid Operations  

SciTech Connect

The power system balancing process, which includes the scheduling, real time dispatch (load following) and regulation processes, is traditionally based on deterministic models. Since the conventional generation needs time to be committed and dispatched to a desired megawatt level, the scheduling and load following processes use load and wind power production forecasts to achieve future balance between the conventional generation and energy storage on the one side, and system load, intermittent resources (such as wind and solar generation) and scheduled interchange on the other side. Although in real life the forecasting procedures imply some uncertainty around the load and wind forecasts (caused by forecast errors), only their mean values are actually used in the generation dispatch and commitment procedures. Since the actual load and intermittent generation can deviate from their forecasts, it becomes increasingly unclear (especially, with the increasing penetration of renewable resources) whether the system would be actually able to meet the conventional generation requirements within the look-ahead horizon, what the additional balancing efforts would be needed as we get closer to the real time, and what additional costs would be incurred by those needs. In order to improve the system control performance characteristics, maintain system reliability, and minimize expenses related to the system balancing functions, it becomes necessary to incorporate the predicted uncertainty ranges into the scheduling, load following, and, in some extent, into the regulation processes. It is also important to address the uncertainty problem comprehensively, by including all sources of uncertainty (load, intermittent generation, generators forced outages, etc.) into consideration. All aspects of uncertainty such as the imbalance size (which is the same as capacity needed to mitigate the imbalance) and generation ramping requirement must be taken into account. The latter unique features make this work a significant step forward toward the objective of incorporating of wind, solar, load, and other uncertainties into power system operations. In this report, a new methodology to predict the uncertainty ranges for the required balancing capacity, ramping capability and ramp duration is presented. Uncertainties created by system load forecast errors, wind and solar forecast errors, generation forced outages are taken into account. The uncertainty ranges are evaluated for different confidence levels of having the actual generation requirements within the corresponding limits. The methodology helps to identify system balancing reserve requirement based on a desired system performance levels, identify system breaking points, where the generation system becomes unable to follow the generation requirement curve with the user-specified probability level, and determine the time remaining to these potential events. The approach includes three stages: statistical and actual data acquisition, statistical analysis of retrospective information, and prediction of future grid balancing requirements for specified time horizons and confidence intervals. Assessment of the capacity and ramping requirements is performed using a specially developed probabilistic algorithm based on a histogram analysis incorporating all sources of uncertainty and parameters of a continuous (wind forecast and load forecast errors) and discrete (forced generator outages and failures to start up) nature. Preliminary simulations using California Independent System Operator (California ISO) real life data have shown the effectiveness of the proposed approach. A tool developed based on the new methodology described in this report will be integrated with the California ISO systems. Contractual work is currently in place to integrate the tool with the AREVA EMS system.

Makarov, Yuri V.; Huang, Zhenyu; Etingov, Pavel V.; Ma, Jian; Guttromson, Ross T.; Subbarao, Krishnappa; Chakrabarti, Bhujanga B.

2010-09-01T23:59:59.000Z

303

Wind Turbine Generator System Acoustic Noise Test Report for the ARE 442 Wind Turbine  

Science Conference Proceedings (OSTI)

This test was conducted on the ARE 442 as part of the U.S. Department of Energy's (DOE's) Independent Testing project. This project was established to help reduce the barriers of wind energy expansion by providing independent testing results for small turbines. In total, five turbines are being tested at the National Wind Technology Center (NWTC) as a part of this project. Acoustic noise testing is one of up to five tests that may be performed on the turbines, including duration, safety and function, power performance, and power quality tests. The acoustic noise test was conducted to the IEC 61400-11 Edition 2.1.

Huskey, A.; van Dam, J.

2010-11-01T23:59:59.000Z

304

Characterizing the Impacts of Significant Wind Generation Facilities on Bulk Power System Operations Planning: Utility Wind Interest Group - Xcel Energy-North Case Study  

Science Conference Proceedings (OSTI)

This report describes a case study evaluation of the impact of wind generation on electricity grid operations in the Xcel Energy-North service area around Minneapolis, Minnesota. The project's methodology and results will be useful when evaluating the operating impacts of wind generation at other locations.

2003-12-17T23:59:59.000Z

305

Indirect vector control of a squirrel cage induction generator wind turbine  

Science Conference Proceedings (OSTI)

The paper deals with a squirrel cage induction generator connected to the grid through a back-to-back converter driven by vector control. The stator-side converter controls the generator torque by means of an indirect vector control scheme. In order ... Keywords: Back-to-back converter, Low voltage ride through, Squirrel cage induction generator (SCIG), Torque regulation, Vector control, Wind power generation

Jos Luis DomNguez-GarcA; Oriol Gomis-Bellmunt; LluS Trilla-Romero; Adri Junyent-Ferr

2012-07-01T23:59:59.000Z

306

Effects of Temporal Wind Patterns on the Value of Wind-Generated Electricity in California and the Northwest  

E-Print Network (OSTI)

approach to locating wind farms in the UK," Renewablepower production at existing wind farms. Each of these is anpower from potential wind farm locations in California and

Wiser, Ryan H

2008-01-01T23:59:59.000Z

307

Effects of Temporal Wind Patterns on the Value of Wind-Generated Electricity in California and the Northwest  

E-Print Network (OSTI)

presented at European Wind Energy Con- ference, Athens,optimal planning for wind energy conver- sion systems overStates " presented at European Wind Energy Con- ference and

Wiser, Ryan H

2008-01-01T23:59:59.000Z

308

Short-Term Wind Generation Forecasting Using Artificial Neural Networks  

Science Conference Proceedings (OSTI)

Wind power is a highly intermittent power output resource that cannot be bid competitively in a traditional market due to scheduling problems associated with the resource. The California Independent System Operator (CAISO) has proposed a unique market arrangement that makes such bidding possible. The central part of the arrangement is a provision that deviations between metered and scheduled energy for participating intermittent renewable resources will be averaged across a calendar month, and paid or ch...

2003-10-27T23:59:59.000Z

309

Wind/PV Generation for Frequency Regulation and Oscillation Damping in the Eastern Interconnection  

SciTech Connect

This report presents the control of renewable energy sources, including the variable-speed wind generators and solar photovoltaic (PV) generators, for frequency regulation and inter-area oscillation damping in the U.S. Eastern Interconnection (EI). In this report, based on the user-defined wind/PV generator electrical control model and the 16,000-bus Eastern Interconnection dynamic model, the additional controllers for frequency regulation and inter-area oscillation damping are developed and incorporated and the potential contributions of renewable energy sources to the EI system frequency regulation and inter-area oscillation damping are evaluated.

Liu, Yong [The University of Tennessee, Knoxville] [The University of Tennessee, Knoxville; Gracia, Jose R [ORNL] [ORNL; Hadley, Stanton W [ORNL] [ORNL; Liu, Yilu [ORNL] [ORNL

2013-12-01T23:59:59.000Z

310

Modular simulation of a hybrid power system with diesel and wind turbine generation  

Science Conference Proceedings (OSTI)

In this paper, the authors present the modular simulation tool they developed to help study the system dynamics for wind-diesel power systems. The principal modules of the simulator, which include a diesel generator, a wind turbine generator, a rotary converter with a battery, a village load and a dump load, are described. With a case study, the authors demonstrate how the designer benefits from easily understanding the effects of system modifications. Using this tool, a designer can easily develop control strategies to balance the system power flows under different generation/load conditions.

Bialasiewicz, J.T.; Mulijadi, E.; Drouilhet, S.; Nix, G.

1998-06-01T23:59:59.000Z

311

Multiple Timescale Dispatch and Scheduling for Stochastic Reliability in Smart Grids with Wind Generation Integration  

E-Print Network (OSTI)

Integrating volatile renewable energy resources into the bulk power grid is challenging, due to the reliability requirement that at each instant the load and generation in the system remain balanced. In this study, we tackle this challenge for smart grid with integrated wind generation, by leveraging multi-timescale dispatch and scheduling. Specifically, we consider smart grids with two classes of energy users - traditional energy users and opportunistic energy users (e.g., smart meters or smart appliances), and investigate pricing and dispatch at two timescales, via day-ahead scheduling and realtime scheduling. In day-ahead scheduling, with the statistical information on wind generation and energy demands, we characterize the optimal procurement of the energy supply and the day-ahead retail price for the traditional energy users; in realtime scheduling, with the realization of wind generation and the load of traditional energy users, we optimize real-time prices to manage the opportunistic energy users so as...

He, Miao; Zhang, Junshan

2010-01-01T23:59:59.000Z

312

The integrated design of a permanent-magnet generator for small wind energy conversion system  

Science Conference Proceedings (OSTI)

This paper presents the integrated design, analysis and performance test of a 1.4 kW, radial-flux, permanent-magnet generator applied to small wind energy conversion system (WECS). In a small WECS, the three major components, i.e., turbine, generator ...

Min-Fu Hsieh; Yu-Han Yeh

2012-12-01T23:59:59.000Z

313

A next-generation modeling capability assesses wind turbine array fluid dynamics and aeroelastic simulations  

E-Print Network (OSTI)

A next-generation modeling capability assesses wind turbine array fluid dynamics and aeroelastic of multi-megawatt turbines requires a new generation of modeling capability to assess individual turbine performance as well as detailed turbine- turbine and turbine-atmosphere interactions. Scientists

314

Power System Modeling of 20percent Wind-Generated Electricity by 2030  

SciTech Connect

The Wind Energy Deployment System model was used to estimate the costs and benefits associated with producing 20% of the nation's electricity from wind technology by 2030. This generation capacity expansion model selects from electricity generation technologies that include pulverized coal plants, combined cycle natural gas plants, combustion turbine natural gas plants, nuclear plants, and wind technology to meet projected demand in future years. Technology cost and performance projections, as well as transmission operation and expansion costs, are assumed. This study demonstrates that producing 20% of the nation's projected electricity demand in 2030 from wind technology is technically feasible, not cost-prohibitive, and provides benefits in the forms of carbon emission reductions, natural gas price reductions, and water savings.

Bolinger, Mark A; Hand, Maureen; Blair, Nate; Bolinger, Mark; Wiser, Ryan; Hern, Tracy; Miller, Bart; O'Connell, R.

2008-06-09T23:59:59.000Z

315

Power System Modeling of 20percent Wind-Generated Electricity by 2030  

SciTech Connect

The Wind Energy Deployment System model was used to estimate the costs and benefits associated with producing 20% of the nation's electricity from wind technology by 2030. This generation capacity expansion model selects from electricity generation technologies that include pulverized coal plants, combined cycle natural gas plants, combustion turbine natural gas plants, nuclear plants, and wind technology to meet projected demand in future years. Technology cost and performance projections, as well as transmission operation and expansion costs, are assumed. This study demonstrates that producing 20% of the nation's projected electricity demand in 2030 from wind technology is technically feasible, not cost-prohibitive, and provides benefits in the forms of carbon emission reductions, natural gas price reductions, and water savings.

Bolinger, Mark A; Hand, Maureen; Blair, Nate; Bolinger, Mark; Wiser, Ryan; Hern, Tracy; Miller, Bart; O& #39; Connell, R.

2008-06-09T23:59:59.000Z

316

Effects of turbulence on power generation for variable-speed wind turbines  

DOE Green Energy (OSTI)

One of the primary advantages of variable-speed wind turbines over fixed-speed turbines should be improved aerodynamic efficiency. With variable-speed generation, in order to maintain a constant ratio of wind speed to tip speed, the wind turbine changes rotor speed as the wind speed changes. In this paper we compare a stall-controlled, variable-speed wind turbine to a fixed-speed turbine. The focus of this paper is to investigate the effects of variable speed on energy capture and its ability to control peak power. We also show the impact of turbulence on energy capture in moderate winds. In this report, we use a dynamic simulator to apply different winds to a wind turbine model. This model incorporates typical inertial and aerodynamic performance characteristics. From this study we found a control strategy that makes it possible to operate a stall-controlled turbine using variable speed to optimize energy capture and to control peak power. We also found that turbulence does not have a significant impact on energy capture.

Muljadi, E.; Butterfield, C.P.; Buhl, M.L. Jr.

1996-11-01T23:59:59.000Z

317

Methods for Estimating the Mean and the Standard Deviation of Wind Direction  

Science Conference Proceedings (OSTI)

In a recent paid, the author reviewed methods for estimating the mean and the standard deviation of wind direction. Some comments on this subject are now added. If large sporadic eddy fluctuations do not occur in a sampling duration, we can ...

Yukihiro Mori

1987-09-01T23:59:59.000Z

318

Effects of Temporal Wind Patterns on the Value of Wind-Generated Electricity in California and the Northwest  

E-Print Network (OSTI)

Report - 2006 Minnesota Wind Integration Study, Volume I,"M. Schuerger, "Wind Plant Integration: Costs, Status, and

Wiser, Ryan H

2008-01-01T23:59:59.000Z

319

Land Use for Wind, Solar, and Geothermal Electricity Generation Facilities in the United States  

Science Conference Proceedings (OSTI)

This report provides data and analysis of the land use associated with utility-scale wind, photovoltaic (PV), concentrating solar power (CSP), and geothermal projects. The analysts evaluated 458 existing or proposed projects, representing (as of 2012 third quarter) 51% of installed wind capacity, 80% of PV and CSP capacity, and all known geothermal power plants in the United States. The report identifies two major land use classes: 1) direct area (land permanently or temporarily disturbed due to ...

2012-12-31T23:59:59.000Z

320

Iowa / Nebraska Distributed Wind Generation Projects First and Second-Year Operating Experience: 1999-2001: U.S. Department of Energ y - EPRI Wind Turbine Verification Program  

Science Conference Proceedings (OSTI)

The Wind Turbine Verification Program (TVP) is a collaborative effort of the U.S. Department of Energy (DOE), EPRI, and host utilities to develop, construct, and operate wind power plants. This report describes the first- and second-year operating experience at the 2.25-MW Iowa Distributed Wind Generation Project (IDWGP) in Algona, Iowa, and the 1.5-MW Nebraska Distributed Wind Generation Project (NDWGP) in Springview, Nebraska. The lessons learned in both projects will be valuable to other utilities pla...

2001-12-03T23:59:59.000Z

Note: This page contains sample records for the topic "direct wind generator" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Sizing storage and wind generation capacities in remote power systems.  

E-Print Network (OSTI)

??Global adoption of renewable energy is increasing due to growing concern over climate change, increasing costs associated with conventional generation, and decreasing capital investment costs (more)

Gassner, Andy

2010-01-01T23:59:59.000Z

322

The Impact of Wind Power Generation on Wholesale Electricity Price ...  

Science Conference Proceedings (OSTI)

price for power generation are examined to forecast LNG price for power genera- tion. Information on future power plant's construction and decommission plan...

323

BPA curtails wind power generators during high hydropower ...  

U.S. Energy Information Administration (EIA)

Energy Information Administration - EIA ... The hydro capacity in the Pacific Northwest generates large amounts of electricity when river flows are high, ...

324

Generic Models and Model Validation for Wind and Solar PV Generation: Technical Update  

Science Conference Proceedings (OSTI)

The influx of variable generation technologies, particularly wind generation, into the bulk transmission grid in the U.S. and internationally has been significant over the past decade. This trend will most likely continue in light of national (in other countries) and state renewable portfolio standards. Thus, there is at present a need for generic, standard and publicly available models for variable generation technologies for the purpose of power system planning studies. EPRI has been a key participant ...

2011-12-20T23:59:59.000Z

325

Assessment of Wind/Solar Co-located Generation in Texas  

SciTech Connect

This paper evaluates the opportunity to load co-located wind and solar generation capacity onto a constrained transmission system while engendering only minimal losses. It quantifies the economic and energy opportunities and costs associated with pursuing this strategy in two Texas locations ?¢???? one in west Texas and the other in south Texas. The study builds upon previous work published by the American Solar Energy Society (ASES) which illuminated the potential benefits of negative correlation of wind and solar generation in some locations by quantifying the economic and energy losses which would arise from deployment of solar generation in areas with existing wind generation and constrained transmission capacity. Clean Energy Associates (CEA) obtained and incorporated wind and solar resource data and the Electric Reliability Council of Texas (ERCOT)) load and price data into a model which evaluates varying levels of solar thermal, solar photovoltaic (PV) and wind capacity against an assumed transmission capacity limit at each of the two locations.

Steven M. Wiese

2009-07-20T23:59:59.000Z

326

Direct Determination of Wind Shears from the Gradients of Satellite Radiance Observations  

Science Conference Proceedings (OSTI)

To the extent that the stratosphere wind field is close to geostrophic, the thermal wind is a good approximation to the vertical wind shear (vertical variation of the horizontal wind). And since the thermal wind is proportional to the horizontal ...

George Ohring; Binyamin Neeman; Louis D. Duncan

1981-11-01T23:59:59.000Z

327

Control strategies of doubly fed induction generator-based wind turbine system with new rotor current protection topology  

Science Conference Proceedings (OSTI)

A protection scheme of a doubly fed induction generator (DFIG) based wind turbine system during faults is crowbar activation. With this protection

Jackson John Justo; Kyoung-Soo Ro

2012-01-01T23:59:59.000Z

328

Modeling, analysis, control and design application guidelines of doubly fed induction generator (DFIG) for wind power applications.  

E-Print Network (OSTI)

??Double Fed Induction Generators (DFIG) has been widely used for the past two decades in large wind farms. However, there are many open-ended problems yet (more)

Masaud, Tarek

2013-01-01T23:59:59.000Z

329

Novel Control of PV Solar and Wind Farm Inverters as STATCOM for Increasing Connectivity of Distributed Generators.  

E-Print Network (OSTI)

??The integration of distributed generators (DGs) such as wind farms and PV solar farms in distribution networks is getting severely constrained due to problems of (more)

AC, Mahendra

2013-01-01T23:59:59.000Z

330

A Comparison of Forecast Error Generators for Modeling Wind and Load Uncertainty  

Science Conference Proceedings (OSTI)

This paper presents four algorithms to generate random forecast error time series. The performance of four algorithms is compared. The error time series are used to create real-time (RT), hour-ahead (HA), and day-ahead (DA) wind and load forecast time series that statistically match historically observed forecasting data sets used in power grid operation to study the net load balancing need in variable generation integration studies. The four algorithms are truncated-normal distribution models, state-space based Markov models, seasonal autoregressive moving average (ARMA) models, and a stochastic-optimization based approach. The comparison is made using historical DA load forecast and actual load values to generate new sets of DA forecasts with similar stoical forecast error characteristics (i.e., mean, standard deviation, autocorrelation, and cross-correlation). The results show that all methods generate satisfactory results. One method may preserve one or two required statistical characteristics better the other methods, but may not preserve other statistical characteristics as well compared with the other methods. Because the wind and load forecast error generators are used in wind integration studies to produce wind and load forecasts time series for stochastic planning processes, it is sometimes critical to use multiple methods to generate the error time series to obtain a statistically robust result. Therefore, this paper discusses and compares the capabilities of each algorithm to preserve the characteristics of the historical forecast data sets.

Lu, Ning; Diao, Ruisheng; Hafen, Ryan P.; Samaan, Nader A.; Makarov, Yuri V.

2013-07-25T23:59:59.000Z

331

Variance Analysis of Wind and Natural Gas Generation under Different Market Structures: Some Observations  

DOE Green Energy (OSTI)

Does large scale penetration of renewable generation such as wind and solar power pose economic and operational burdens on the electricity system? A number of studies have pointed to the potential benefits of renewable generation as a hedge against the volatility and potential escalation of fossil fuel prices. Research also suggests that the lack of correlation of renewable energy costs with fossil fuel prices means that adding large amounts of wind or solar generation may also reduce the volatility of system-wide electricity costs. Such variance reduction of system costs may be of significant value to consumers due to risk aversion. The analysis in this report recognizes that the potential value of risk mitigation associated with wind generation and natural gas generation may depend on whether one considers the consumer's perspective or the investor's perspective and whether the market is regulated or deregulated. We analyze the risk and return trade-offs for wind and natural gas generation for deregulated markets based on hourly prices and load over a 10-year period using historical data in the PJM Interconnection (PJM) from 1999 to 2008. Similar analysis is then simulated and evaluated for regulated markets under certain assumptions.

Bush, B.; Jenkin, T.; Lipowicz, D.; Arent, D. J.; Cooke, R.

2012-01-01T23:59:59.000Z

332

Parallel Operation of Wind Turbine, Fuel Cell, and Diesel Generation Sources: Preprint  

DOE Green Energy (OSTI)

We investigated a small isolated hybrid power system that used a parallel combination of dispatchable and non-dispatchable power generation sources. The non-dispatchable generation came from a nature-dependent wind turbine, and the dispatchable generations were a fuel cell and a diesel generator. On the load side, the non-dispatchable portion was the village load, and the dispatchable portion was the energy storage, which could be in many different forms (e.g., space/water heater, electrolysis, battery charger, etc.) The interaction among different generation sources and the loads was investigated. Simulation results showed the effect of the proposed system on voltage and frequency fluctuations.

Muljadi, E.; Wang, C.; Nehrir, M. H.

2004-06-01T23:59:59.000Z

333

Wind Generation Feasibility Study for Sac & Fox Tribe of the Mississippi in Iowa (Meskwaki Nation)  

SciTech Connect

1.2 Overview The Meskwaki Nation will obtain an anemometer tower. Install the tower at the site that has been pre-qualified as the site most likely to produce maximum electric power from the wind. It will collect meteorological data from the towerâ??s sensors for a one year period, as required for due diligence to identify the site as appropriate for the installation of a wind turbine to provide electric power for the community. Have the collected data analyzed by a meteorologist and a professionally certified wind engineer to produce the reports of expected power generation at the site, for the specific wind turbine(s) under consideration for installation. 1.2.1 Goals of the Tribe The feasibility study reports, including technical and business analyses will be used to obtain contracts and financing required to develop and implement a wind turbine project on the Meskwaki Settlement. Our goal is to produce two (2) mega watts of power and to reduce the cost for electricity currently being paid by the Meskwaki Casino. 1.2.2 Project Objectives Meet the energy needs of the community with clean energy. Bring renewable energy to the settlement in a responsible, affordable manner. Maximize both the economic and the spiritual benefits to the tribe from energy independence. Integrate the Tribeâ??s energy policies with its economic development goals. Contribute to achieving the Tribeâ??s long-term goals of self-determination and sovereignty. 1.2.3 Project Location The precise location proposed for the tower is at the following coordinates: 92 Degrees, 38 Minutes, 46.008 Seconds West Longitude 41 Degrees, 59 Minutes, 45.311 Seconds North Latitude. A circle of radius 50.64 meters, enclosing and area of 1.98 acres in PLSS Township T83N, Range R15W, in Iowa. In relative directions, the site is 1,650 feet due west of the intersection of Highway 30 and 305th Street in Tama, Iowa, as approached from the direction of Toledo, Iowa. It is bounded on the north by Highway 30 and on the south by 305th Street, a street which runs along a meandering west-south-west heading from this intersection with Highway 30. In relation to Settlement landmarks, it is 300 meters west of the Meskwaki water tower found in front of the Meskwaki Public Works Department, and is due north of the athletic playing fields of the Meskwaki Settlement School. The accompanying maps (in the Site Resource Maps File) use a red pushpin marker to indicate the exact location, both in the overview frames and in the close-up frame. 1.2.4 Long Term Energy Vision The Meskwaki Tribe is committed to becoming energy self-sufficient, improving the economic condition of the tribe, and maintaining Tribal Values of closeness with Grandmother Earth. The details of the Tribeâ??s long-term vision continues to evolve. A long term vision exists of: 1) a successful assessment program; 2) a successful first wind turbine project reducing the Tribeâ??s cost of electricity; 3) creation of a Meskwaki Tribal Power Utility/Coop under the auspices of the new tribal Corporation, as we implement a master plan for economic and business development; 4), and opening the doors for additional wind turbines/renewable energy sources on the community. The additional turbines could lead directly to energy self-sufficiency, or might be the one leg of a multi-leg approach using multiple forms of renewable energy to achieve self-sufficiency. We envision current and future assessment projects providing the data needed to qualify enough renewable energy projects to provide complete coverage for the entire Meskwaki Settlement, including meeting future economic development projectsâ?? energy needs. While choosing not to engage in excessive optimism, we can imagine that in the future the Iowa rate-setting bodies will mandate that grid operators pay fair rates (tariffs) to renewable suppliers. We will be ready to expand renewable production of electricity for export, when that time comes. The final report includes the Wind

Lasley, Larry C. [Sac & Fox Tribe of the Mississippi in Iowa

2013-03-19T23:59:59.000Z

334

Impacts of Wind and Solar on Fossil-Fueled Generators: Preprint  

DOE Green Energy (OSTI)

High penetrations of wind and solar power will impact the operations of the remaining generators on the power system. Regional integration studies have shown that wind and solar may cause fossil-fueled generators to cycle on and off and ramp down to part load more frequently and potentially more rapidly. Increased cycling, deeper load following, and rapid ramping may result in wear-and-tear impacts on fossil-fueled generators that lead to increased capital and maintenance costs, increased equivalent forced outage rates, and degraded performance over time. Heat rates and emissions from fossil-fueled generators may be higher during cycling and ramping than during steady-state operation. Many wind and solar integration studies have not taken these increased cost and emissions impacts into account because data have not been available. This analysis considers the cost and emissions impacts of cycling and ramping of fossil-fueled generation to refine assessments of wind and solar impacts on the power system.

Lew, D.; Brinkman, G.; Kumar, N.; Besuner, P.; Agan, D.; Lefton, S.

2012-08-01T23:59:59.000Z

335

Power System Modeling of 20percent Wind-Generated Electricity by 2030  

E-Print Network (OSTI)

price is constant Shallow Offshore Wind Technology Cost WindOhio was modified and offshore wind development in Texas was

Hand, Maureen

2008-01-01T23:59:59.000Z

336

Wind for Schools: Developing Educational Programs to Train a New Workforce and the Next Generation of Wind Energy Experts (Poster)  

DOE Green Energy (OSTI)

As the United States dramatically expands wind energy deployment, the industry is challenged with developing a skilled workforce and addressing public resistance. Wind Powering America's Wind for Schools project addresses these issues by: Developing Wind Application Centers (WACs) at universities; installing small wind turbines at community "host" schools; and implementing teacher training with interactive curricula at each host school.

Flowers, L.; Baring-Gould, I.

2010-04-01T23:59:59.000Z

337

UWIG Distributed Wind Impacts Analysis Tool Progress Report: Utility Wind Interest Group Distributed Wind Impacts Project  

Science Conference Proceedings (OSTI)

Distributed wind generation systems consist of small clusters of wind turbines located near small load centers and connected directly to the distribution system. Depending on the electrical characteristics of the distribution line, the type of wind turbine, and the relative locations of the interconnection to the distribution system, the substation, and customer connections, distributed wind generation can significantly affect the stability, power quality, and operations of the distribution line. As a re...

2004-03-29T23:59:59.000Z

338

Power System Modeling of 20percent Wind-Generated Electricity by 2030  

E-Print Network (OSTI)

2008). 20% Wind Energy by 2030: Increasing Wind EnergysOutlook, with Projections to 2030. Washington, DC: Energyfrom wind technology by 2030. 15. SUBJECT TERMS wind-

Hand, Maureen

2008-01-01T23:59:59.000Z

339

Variance Analysis of Wind and Natural Gas Generation under Different Market Structures: Some Observations  

NLE Websites -- All DOE Office Websites (Extended Search)

Variance Analysis of Wind and Variance Analysis of Wind and Natural Gas Generation under Different Market Structures: Some Observations Brian Bush, Thomas Jenkin, David Lipowicz, and Douglas J. Arent National Renewable Energy Laboratory Roger Cooke Resources for the Future Technical Report NREL/TP-6A20-52790 January 2012 NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency & Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. National Renewable Energy Laboratory 1617 Cole Boulevard Golden, Colorado 80401 303-275-3000 * www.nrel.gov Contract No. DE-AC36-08GO28308 Variance Analysis of Wind and Natural Gas Generation under Different Market Structures: Some Observations Brian Bush, Thomas Jenkin, David Lipowicz,

340

Effects of Temporal Wind Patterns on the Value of Wind-Generated Electricity in California and the Northwest  

E-Print Network (OSTI)

Modeling Utility-Scale Wind Power Plants Part 2: Capac- ityNakafuji, "Grid Im- pacts of Wind Power Variability: RecentParsons, and M. Milligan, "Wind Power Impacts on Electric-

Wiser, Ryan H

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "direct wind generator" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Analysis of Alternative Extensions of the Existing Production Tax Credit for Wind Generator  

Reports and Publications (EIA)

Requestor: Ms. Janice Mays, Chief Counsel, Committee on Ways & Means, U.S. House of RepresentativesThis is a letter response requesting analysis of alternative extensions of the existing production tax credit (PTC) that would apply to wind generators only.

Information Center

2007-05-01T23:59:59.000Z

342

Performance of Double-Output Induction Generator for Wind Energy Conversion Systems  

Science Conference Proceedings (OSTI)

With growing concerns about environmental pollution and a possible energy shortage, great efforts have been taken by the governments around the world to implement renewable energy programs, based mainly on wind power, solar energy, small hydro-electric ... Keywords: Double-output induction generator (DOIG), steady state model, field-oriented control, dynamic model, PWM converters

B. Chitti Babu; K. B. Mohanty; C. Poongothai

2008-07-01T23:59:59.000Z

343

A Review of Research Status on LVRT Technology in Doubly-fed Wind Turbine Generator System  

Science Conference Proceedings (OSTI)

This paper gave a detailed introduction and analysis on the research status and industrialization situation of current LVRT Technology in doubly-fed wind turbine generator (WTG) system. Starting with the urgency of LVRT research in China, the paper introduced ... Keywords: LVRT, doubly-fed, research status, review

Yun Wang; Dong-li Zhao; Bin Zhao; Hong-hua Xu

2010-06-01T23:59:59.000Z

344

Effects of Temporal Wind Patterns on the Value of Wind-Generated Electricity in California and the Northwest  

E-Print Network (OSTI)

Wind Plant Integration: Costs, Status, and Issues," IEEE Power & Energy,wind power; the treatment of renewable energy in integrated resource planning; the cost

Wiser, Ryan H

2008-01-01T23:59:59.000Z

345

Study of Various Types of Faults with Neuro Fuzzy Controlled SSSC and STATCOM in Stabilization of Grid Connected Wind Generator  

Science Conference Proceedings (OSTI)

When wind farm is integrated to the power system, it has stability problem. Fixed speed induction generators require reactive power to maintain air gap flux. Reactive power equipments like Static Synchronous Compensator (STATCOM) and Static Synchronous ... Keywords: wind farm, grid, Induction generator (IG), STATCOM, SSSC, reactive power compensation, Neuro fuzzy controller (NFC), various types of faults

Rohi Kachroo; H. S. Dalvi

2012-11-01T23:59:59.000Z

346

Model of variable speed constant frequency double fed wind power generation system and analysis of its operating performance  

Science Conference Proceedings (OSTI)

Structure of variable speed constant frequency double fed wind power generation system (WPGS) was analyzed, and its model was established. Maximum power point tracking (MPPT) control, constant power control and vector control for WPGS were discussed. ... Keywords: operating performance, variable speed constant frequency, vector control, wind power generation system

Pan Tinglong; Ji Zhicheng

2009-06-01T23:59:59.000Z

347

Investigation of vortex generators for augmentation of wind turbine power performance  

SciTech Connect

This study focuses on the use of vortex generators (VGs) for performance augmentation of the stall-regulated AWT-26 wind turbine. The goal was to design a VG array which would increase annual energy production (AEP) by increasing power output at moderate wind speeds, without adversely affecting the loads or stall-regulation performance of the turbine. Wind tunnel experiments were conducted at the University of Washington to evaluate the effect of VGs on the AWT-26 blade, which is lofted from National Renewable Energy Laboratory (NREL) S-series airfoils. Based on wind-tunnel results and analysis, a VG array was designed and then tested on the AWT-26 prototype, designated P1. Performance and loads data were measured for P1, both with and without VGs installed. the turbine performance with VGs met most of the design requirements; power output was increased at moderate wind speeds with a negligible effect on peak power. However, VG drag penalties caused a loss in power output for low wind speeds, such that performance with VGs resulted in a net decrease in AEP for sites having annual average wind speeds up to 8.5 m/s. While the present work did not lead to improved AEP for the AWT-2 turbine, it does provide insight into performance augmentation of wind turbines with VGs. The safe design of a VG array for a stall-regulated turbine has been demonstrated, and several issues involving optimal performance with VGs have been identified and addressed. 15 refs., 34 figs., 10 tabs.

Griffin, D.A. [Lynette (R.) and Associates, Seattle, WA (United States)

1996-12-01T23:59:59.000Z

348

Missing wind data forecasting with adaptive neuro-fuzzy inference system  

Science Conference Proceedings (OSTI)

In any region, to begin generating electricity from wind energy, it is necessary to determine the 1-year distribution characteristics of wind speed. For this aim, a wind observation station must be constructed and 1-year wind speed and direction data ... Keywords: ANFIS, Back-propagation, Forecasting, Missing data, Wind energy, Wind speed

Fatih O. Hocaoglu; Yusuf Oysal; Mehmet Kurban

2009-02-01T23:59:59.000Z

349

Using Electric Vehicles to Mitigate Imbalance Requirements Associated with an Increased Penetration of Wind Generation  

SciTech Connect

The integration of variable renewable generation sources continues to be a significant area of focus for power system planning. Renewable portfolio standards and initiatives to reduce the dependency on foreign energy sources drive much of the deployment. Unfortunately, renewable energy generation sources like wind and solar tend to be highly variable in nature. To counter the energy imbalance caused by this variability, wind generation often requires additional balancing resources to compensate for the variability in the electricity production. With the expected electrification of transportation, electric vehicles may offer a new load resource for meeting all, or part, of the imbalance created by the renewable generation. This paper investigates a regulation-services-based battery charging method on a population of plug-in hybrid electric vehicles to meet the power imbalance requirements associated with the introduction of 11 GW of additional wind generation into the Northwest Power Pool. It quantifies the number of vehicles required to meet the imbalance requirements under various charging assumptions.

Tuffner, Francis K.; Kintner-Meyer, Michael CW

2011-10-10T23:59:59.000Z

350

Power System Modeling of 20percent Wind-Generated Electricity by 2030  

E-Print Network (OSTI)

curve for wind energy: energy costs including connection toavailable to transport wind energy, the cost of feeder linescapital and financing costs of wind and conventional energy

Hand, Maureen

2008-01-01T23:59:59.000Z

351

Power and Frequency Control as it Relates to Wind-Powered Generation  

E-Print Network (OSTI)

of large amounts of wind power production might requirewill be satisfactory as wind power provides an increasing64 7.2 Wind Power in Relation to System

Lacommare, Kristina S H

2011-01-01T23:59:59.000Z

352

EPRI-DOE Handbook Supplement of Energy Storage for Grid Connected Wind Generation Applications  

Science Conference Proceedings (OSTI)

To date, the use of energy storage systems to optimize wind power generation has been limited to small, off-grid rural or village power applications plus a few technology demonstration-scale battery storage projects for grid connected applications. However, recent developments in advanced energy storage technologies and other technical, economic, and social factors suggest a promising future for such energy storage applications. This Handbook Supplement provides an objective information resource on the l...

2004-12-15T23:59:59.000Z

353

Dependence of solar wind power spectra on the direction of the local mean magnetic field  

E-Print Network (OSTI)

(Abridged) Wavelet analysis can be used to measure the power spectrum of solar wind fluctuations along a line in any direction with respect to the local mean magnetic field. This technique is applied to study solar wind turbulence in high-speed streams in the ecliptic plane near solar minimum using magnetic field measurements with a cadence of eight vectors per second. The analysis of nine high-speed streams shows that the reduced spectrum of magnetic field fluctuations (trace power) is approximately azimuthally symmetric about B_0 in both the inertial range and dissipation range; in the inertial range the spectra are characterized by a power-law exponent that changes continuously from 1.6 \\pm 0.1 in the direction perpendicular to the mean field to 2.0 \\pm 0.1 in the direction parallel to the mean field. The large uncertainties suggest that the perpendicular power-law indices 3/2 and 5/3 are both consistent with the data. The results are similar to those found by Horbury et al. (2008) at high heliographic lat...

Podesta, J J

2009-01-01T23:59:59.000Z

354

Effects of Temporal Wind Patterns on the Value of Wind-Generated Electricity in California and the Northwest  

SciTech Connect

Wind power production is variable, but also has diurnal and seasonal patterns. These patterns differ between sites, potentially making electric power from some wind sites more valuable for meeting customer loads or selling in wholesale power markets. This paper investigates whether the timing of wind significantly affects the value of electricity from sites in California and the Northwestern United States. We use both measured and modeled wind data and estimate the time-varying value of wind power with both financial and load-based metrics. We find that the potential difference in wholesale market value between better-correlated and poorly correlated wind sites is modest, on the order of 5-10 percent. A load-based metric, power production during the top 10 percent of peak load hours, varies more strongly between sites, suggesting that the capacity value of different wind projects could vary by as much as 50 percent based on the timing of wind alone.

Wiser, Ryan H; Wiser, Ryan H; Fripp, Matthias

2008-05-01T23:59:59.000Z

355

Comparing Statewide Economic Impacts of New Generation from Wind, Coal, and Natural Gas in Arizona, Colorado, and Michigan  

SciTech Connect

With increasing concerns about energy independence, job outsourcing, and risks of global climate change, it is important for policy makers to understand all impacts from their decisions about energy resources. This paper assesses one aspect of the impacts: direct economic effects. The paper compares impacts to states from equivalent new electrical generation from wind, natural gas, and coal. Economic impacts include materials and labor for construction, operations, maintenance, fuel extraction, and fuel transport, as well as project financing, property tax, and landowner revenues. We examine spending on plant construction during construction years, in addition to all other operational expenditures over a 20-year span. Initial results indicate that adding new wind power can be more economically effective than adding new gas or coal power and that a higher percentage of dollars spent on coal and gas will leave the state. For this report, we interviewed industry representatives and energy experts, in addition to consulting government documents, models, and existing literature. The methodology for this research can be adapted to other contexts for determining economic effects of new power generation in other states and regions.

Tegen, S.

2006-05-01T23:59:59.000Z

356

Comparing Statewide Economic Impacts of New Generation from Wind, Coal, and Natural Gas in Arizona, Colorado, and Michigan: Preprint  

SciTech Connect

With increasing concerns about energy independence, job outsourcing, and risks of global climate change, it is important for policy makers to understand all impacts from their decisions about energy resources. This paper assesses one aspect of the impacts: direct economic effects. The paper compares impacts to states from equivalent new electrical generation from wind, natural gas, and coal. Economic impacts include materials and labor for construction, operations, maintenance, fuel extraction, and fuel transport, as well as project financing, property tax, and landowner revenues. We examine spending on plant construction during construction years, in addition to all other operational expenditures over a 20-year span. Initial results indicate that adding new wind power can be more economically effective than adding new gas or coal power, and that a higher percentage of dollars spent on coal and gas will leave the state. For this report, we interviewed industry representatives and energy experts, in addition to consulting government documents, models, and existing literature. The methodology for this research can be adapted to other contexts for determining economic effects of new power generation in other states and regions.

Tegen, S.

2005-08-01T23:59:59.000Z

357

A KINETIC MODEL OF SOLAR WIND GENERATION BY OBLIQUE ION-CYCLOTRON WAVES  

Science Conference Proceedings (OSTI)

The fast solar wind is generated by extended perpendicular ion heating in coronal holes, but the kinetic mechanism responsible for this heating has not been determined. One long-standing possibility is the resonant-cyclotron dissipation of ion-cyclotron waves, replenished from a turbulent cascade of interacting counter-propagating Alfven waves. We present results of a kinetic model for proton heating by the quasilinear resonant-cyclotron wave-particle interaction in a coronal hole. The resonant wave spectrum is taken as a power law in wavenumber, uniformly distributed in propagation direction between 0 deg. and 60 deg. with respect to the large-scale radial magnetic field. We obtain the steady-state solution of the kinetic guiding-center equation for the proton distribution in an expanding coronal hole, including the effects of large-scale forces of gravity, charge-separation electric field, Alfven wave ponderomotive force, and mirror force, along with the small-scale scattering from the wave dissipation. We find that plausible wave intensities can yield reasonable flow speeds and temperatures in the heliocentric radial range between 2 and 6 solar radii. We address the claim in earlier work that dissipation of parallel-propagating ion-cyclotron waves cannot provide enough acceleration and show that claim to be incorrect. We find that the combined action of the large-scale forces and the resonant-cyclotron scattering produces proton distribution functions with a characteristic structure: compressed in the sunward half of velocity space with a high-density shell separate from the origin, and relatively expanded in the anti-sunward half of velocity space. We suggest that qualitatively similar proton distributions would result from the kinetic evolution of any sufficiently effective perpendicular heating mechanism operating in an expanding coronal hole.

Isenberg, Philip A.; Vasquez, Bernard J. [Institute for the Study of Earth, Oceans and Space and Department of Physics, University of New Hampshire, Durham, NH 03824 (United States)

2011-04-20T23:59:59.000Z

358

The Impact of Dispersed Generation on Electric Power Quality at the Central and South West Services Wind Farm  

Science Conference Proceedings (OSTI)

Economic and environmental concerns have propelled the utility industry toward renewable and clean energy sources as alternatives to coal- and gas-fired power stations. This report presents the results of an evaluation to determine the power quality characteristics of a wind turbine generator at an Oklahoma wind farm which is connected to a 69-kV subtransmission system.

1997-06-17T23:59:59.000Z

359

Generation of Annual-Period Rossby Waves in the South Atlantic Ocean by the Wind Stress Curl  

Science Conference Proceedings (OSTI)

The properties of first-mode annual-period baroclinic Rossby waves generated by the observed wind stress curl in a numerical model of the South Atlantic and Southwest Indian oceans are presented. The forcing wind field for the area 1551S, 45W...

Christopher J. C. Reason; Lawrence A. Mysak; Patrick F. Cummins

1987-11-01T23:59:59.000Z

360

Field Measurements of Duration-Limited Growth of Wind-Generated Ocean Surface Waves at Young Stage of Development  

Science Conference Proceedings (OSTI)

The issue of duration-limited growth of wind-generated waves is of importance to wave studies. Most analytical solutions for wind waves are given in time rather than fetch domain. Numerical modeling of wave development is also often conducted in ...

Paul A. Hwang; David W. Wang

2004-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "direct wind generator" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

A Real-Time Simulator for Doubly Fed Induction Generator based Wind Turbine Applications  

E-Print Network (OSTI)

Abstract- This paper describes a real-time simulator of wind turbine generator system suitable for controller design and tests. The simulated generator is a grid-connected doubly fed induction machine with back-to-back PWM voltage source vector control of the rotor. The simulator is based on RT-LAB real-time simulation platform that allows for easy model-to-real-time-target design from Simulink models. The paper puts special emphasis on the fixed-step simulation problematic of kHz-range PWM inverter drives and the techniques used in the real-time simulator to accurately simulate those drives.

Christian Dufour; Jean Blanger

2004-01-01T23:59:59.000Z

362

Power System Modeling of 20percent Wind-Generated Electricity by 2030  

E-Print Network (OSTI)

J. Charles Smith (Utility Wind Integration Group) and Robertare the integration costs associated with wind power. The

Hand, Maureen

2008-01-01T23:59:59.000Z

363

Power and Frequency Control as it Relates to Wind-Powered Generation  

SciTech Connect

This report is a part of an investigation of the ability of the U.S. power system to accommodate large scale additions of wind generation. The objectives of this report are to describe principles by which large multi-area power systems are controlled and to anticipate how the introduction of large amounts of wind power production might require control protocols to be changed. The operation of a power system is described in terms of primary and secondary control actions. Primary control is fast, autonomous, and provides the first-line corrective action in disturbances; secondary control takes place on a follow-up time scale and manages the deployment of resources to ensure reliable and economic operation. This report anticipates that the present fundamental primary and secondary control protocols will be satisfactory as wind power provides an increasing fraction of the total production, provided that appropriate attention is paid to the timing of primary control response, to short term wind forecasting, and to management of reserves for control action.

Lacommare, Kristina S H

2010-12-20T23:59:59.000Z

364

Sowing the Seeds for a Bountiful Harvest: Shaping the Rules and Creating the Tools for Wisconsin's Next Generation of Wind Farms  

SciTech Connect

Project objectives are twofold: (1) to engage wind industry stakeholders to participate in formulating uniform permitting standards applicable to commercial wind energy installations; and (2) to create and maintain an online Wisconsin Wind Information Center to enable policymakers and the public to increaser their knowledge of and support for wind generation in Wisconsin.

Vickerman, Michael Jay

2012-03-29T23:59:59.000Z

365

Wind-Generated Power Input to the Deep Ocean: An Estimate Using a 1/10 General Circulation Model  

Science Conference Proceedings (OSTI)

Recent studies on the wind-generated power input to the geostrophic and nongeostrophic ocean circulation components have used expressions derived from Ekman dynamics. The present work extends and unifies previous studies by deriving an expression ...

Jin-Song von Storch; Hideharu Sasaki; Jochem Marotzke

2007-03-01T23:59:59.000Z

366

Voltage sag ride through using Improved Adaptive Internal Model Controller for doubly fed induction generator wind farms  

Science Conference Proceedings (OSTI)

This paper presents the effect of a single pulse dither signal injection in adaptive internal model controller for a doubly fed induction generator (DFIG)-based wind farm. Rotor current controller using adaptive internal model controller is designed ...

N. Amuthan, P. Subburaj, P. Melba Mary

2013-02-01T23:59:59.000Z

367

Nonlinear Dual-Mode Control of Variable-Speed Wind Turbines with Doubly Fed Induction Generators  

E-Print Network (OSTI)

This paper presents a feedback/feedforward nonlinear controller for variable-speed wind turbines with doubly fed induction generators. By appropriately adjusting the rotor voltages and the blade pitch angle, the controller simultaneously enables: (a) control of the active power in both the maximum power tracking and power regulation modes, (b) seamless switching between the two modes, and (c) control of the reactive power so that a desirable power factor is maintained. Unlike many existing designs, the controller is developed based on original, nonlinear, electromechanically-coupled models of wind turbines, without attempting approximate linearization. Its development consists of three steps: (i) employ feedback linearization to exactly cancel some of the nonlinearities and perform arbitrary pole placement, (ii) design a speed controller that makes the rotor angular velocity track a desired reference whenever possible, and (iii) introduce a Lyapunov-like function and present a gradient-based approach for mini...

Tang, Choon Yik; Jiang, John N

2010-01-01T23:59:59.000Z

368

Study of transmission and protection elements for wind energy generating systems. Volume 1  

DOE Green Energy (OSTI)

Results are reported of a study at Cornell University on transmission, distribution, and protection systems for large wind-energy generators (WEG) connected to an electric utility grid. Configurations for wind farms on flat terrain, mountain-peak clusters, and installations along a ridge were examined. Computer studies of load-flow and short-circuit behavior confirmed the technical feasibility of the proposed systems. Realistic unit costs for the projected transmission and protection schemes range from $109 to $317 per Kw, depending upon choice of configuration and distance from the grid. Cost of protective equipment is found to be a major factor in most cases, tending to be equal or greater than transmission line costs when the WEG units are located five miles or less from the grid. Several alternatives are suggested for future study.

Linke, S; Teshome, A; Yehsakul, P D

1978-04-01T23:59:59.000Z

369

Understanding best practice regarding interruptible connections for wind generation: lessons from national and international experience  

E-Print Network (OSTI)

allwindgeneratorsbehindaconstrainthad the same subsidyregimeandthesametechnology,themarginalsystembenefitswould includethevalueof theenergyproducedandthevalueofthesubsidynetofproductioncosts.Forsocialoptimalitythis marginalbenefitshouldreflectallof... oflowcarbonnetworktechnologiesinordertodeliver around 1 5 % oftheUKs energydemandfromrenewablesourcesby 2 0 2 0 inthemostcosteffective way.Theprojected demand fromelectricity,heatandtransport ?amountsto 2 3 4 TWh by 2 0 2 0. Wind powerplaysan important...

Anaya, Karim L.; Pollitt, Michael

2013-05-01T23:59:59.000Z

370

Energy Basics: Wind Energy Technologies  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Photo of a hilly field, with six visible wind turbines spinning in the wind. Wind energy technologies use the energy in wind for practical purposes such as generating...

371

Effects of Temporal Wind Patterns on the Value of Wind-Generated Electricity in California and the Northwest  

E-Print Network (OSTI)

value of re- newable electricity; and customer surveys ofCalifornia or Northwestern electricity demand. This may bebetween wind speed and electricity demand," Solar Energy,

Wiser, Ryan H

2008-01-01T23:59:59.000Z

372

A New Wind Turbine Control Method to Smooth Power Generation. Modelling and Comparison to Wind Turbine Frequency Control.  

E-Print Network (OSTI)

??Following the significant increase of world wide installed wind power during the first decade of the 21st century, transmission system operators are faced with new (more)

Solberg, Olov

2012-01-01T23:59:59.000Z

373

Direct Atmospheric Forcing of Geostrophic Eddies  

Science Conference Proceedings (OSTI)

To assess the role of direct stochastic wind forcing in generating oceanic geostrophic eddies we calculate analytically the response of a simple ocean model to a realistic model wind-stress spectrum and compare the results with observations. The ...

Peter Mller; Claude Frankignoul

1981-03-01T23:59:59.000Z

374

A Comparison of Forecast Error Generators for Modeling Wind and Load Uncertainty  

SciTech Connect

This paper presents four algorithms to generate random forecast error time series, including a truncated-normal distribution model, a state-space based Markov model, a seasonal autoregressive moving average (ARMA) model, and a stochastic-optimization based model. The error time series are used to create real-time (RT), hour-ahead (HA), and day-ahead (DA) wind and load forecast time series that statistically match historically observed forecasting data sets, used for variable generation integration studies. A comparison is made using historical DA load forecast and actual load values to generate new sets of DA forecasts with similar stoical forecast error characteristics. This paper discusses and compares the capabilities of each algorithm to preserve the characteristics of the historical forecast data sets.

Lu, Ning; Diao, Ruisheng; Hafen, Ryan P.; Samaan, Nader A.; Makarov, Yuri V.

2013-12-18T23:59:59.000Z

375

The Power Decoupling Control for Wind Power Converter Based on a Novel Speed Sensor-Less  

Science Conference Proceedings (OSTI)

Doubly fed induction generators based wind turbines are today one of the most widely used generation systems in wind farms. The stator is directly connected to the constant frequency three phase grid and the rotor currents are appropriately controlled ...

Zhang Jia-ming; Fu Yang

2009-10-01T23:59:59.000Z

376

The State of the Art of Generators for Wind Energy Conversion Systems  

E-Print Network (OSTI)

based on the wind farm single phase equivalent circuit. The stability analysis is carried out, phase margin, and vector gain margin calculated for different number of wind turbines in operation. The interaction between the wind turbine control system and the wind farm structure in wind farms is deeply

Paris-Sud XI, Université de

377

EFFECT OF PITCH CONTROL AND POWER CONDITIONING ON POWER QUALITY OF VARIABLE SPEED WIND TURBINE GENERATORS  

E-Print Network (OSTI)

Wind energy is considered as the most viable renewable energy options. In a renewable energy system more energy from the wind. One of the options is to use the variable speed wind turbine-speed wind turbine system for transient studies are discussed in this paper. The performance of wind energy

378

Testing requirements for variable-speed generating technology for wind turbine applications. Final report  

Science Conference Proceedings (OSTI)

Guidelines for evaluating the impacts of integrating variable-speed, constant-frequency (VSCF) wind turbines into electric utility systems have been proposed based upon prior test experiences with the NASA VSCF system and the expected performance of the Westinghouse and OMNION VSCF systems. The NASA and Westinghouse VSCF generating systems use a wound rotor induction generator and a cycloconverter, while the OMNION system uses a wound rotor induction generator and a dc-current link converter. The design of VSCF/utility system interface requirements and test plans is based on utility system electrical issues such as utility system control and operation, protection, voltage/reactive power management, power quality, and reliability. A framework for testing VSCF concepts is proposed which includes a three stage process: modeling of the system to analyze design alternatives and simulate disturbances that could be harmful to the actual system; laboratory testing which involves the use of the system under controlled conditions; and field testing to collect data under actual conditions to validate models and analyze the wind turbine behavior.

Herrera, J.I.

1986-05-01T23:59:59.000Z

379

Wind Turbine Generator Model Validation Software Tool (WTGMV) Version 1.0  

Science Conference Proceedings (OSTI)

This software tool allows the user to validate the model for a wind turbine generator (WTG) using measured disturbance data from either a digital fault recorder (DFR) or a phaor measurement unit (PMU) located at the turbine - factor measured data from type testing of the turbine may also be used.The tool also performs parameter optimization on a some of the model parameters such as a few of the controller gains. The tool is a first step in the ultimate plan to enhance the tool to allow for ...

2012-08-30T23:59:59.000Z

380

Balancing of Wind Power.  

E-Print Network (OSTI)

?? In the future, renewable energy share, especially wind power share, in electricity generation is expected to increase. Due to nature of the wind, wind (more)

lker, Muhammed Akif

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "direct wind generator" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Power System Modeling of 20percent Wind-Generated Electricity by 2030  

E-Print Network (OSTI)

B ENEFITS Other benefits associated with wind energy includeof carbon costs, the benefit of wind energy in reducing theWind Energy Deployment System model used to estimate the costs and benefits

Hand, Maureen

2008-01-01T23:59:59.000Z

382

Operational behavior of a double-fed permanent magnet generator for wind turbines  

E-Print Network (OSTI)

Greater efficiency in wind turbine systems is achieved by allowing the rotor to change its rate of rotation as the wind speed changes. The wind turbine system is decoupled from the utility grid and a variable speed operation ...

Reddy, Sivananda Kumjula

2005-01-01T23:59:59.000Z

383

Power System Modeling of 20percent Wind-Generated Electricity by 2030  

E-Print Network (OSTI)

2003. U.S. Department of Energy (2008). 20% Wind Energy by2030: Increasing Wind Energys Contribution to U.S.shows the results of the Wind Energy Deployment System model

Hand, Maureen

2008-01-01T23:59:59.000Z

384

Mixed-Layer Shear Generated by Wind Stress in the Central Equatorial Pacific  

Science Conference Proceedings (OSTI)

Sixteen months of wind and current profile observations in the central equatorial Pacific show the response of the upper-ocean shear to local wind forcing. The shear at the ocean surface is significantly correlated with the wind stress in ...

Fernando Santiago-Mandujano; Eric Firing

1990-10-01T23:59:59.000Z

385

Ancillary Frequency Control of Direct Drive Full-Scale Converter Based Wind Power Plants  

E-Print Network (OSTI)

of doubly fed induction machine (DFIG) and PMSG based wind turbines have been proposed [7-10]. In this paper

Hu, Weihao

386

The Airborne Demonstrator for the Direct-Detection Doppler Wind Lidar ALADIN on ADM-Aeolus. Part II: Simulations and Rayleigh Receiver Radiometric Performance  

Science Conference Proceedings (OSTI)

In the frame of the Atmospheric Dynamics Mission Aeolus (ADM-Aeolus) satellite mission by the European Space Agency (ESA), a prototype of a direct-detection Doppler wind lidar was developed to measure wind from ground and aircraft at 355 nm. Wind ...

Ulrike Paffrath; Christian Lemmerz; Oliver Reitebuch; Benjamin Witschas; Ines Nikolaus; Volker Freudenthaler

2009-12-01T23:59:59.000Z

387

Low Wind Speed Technology Phase II: Development of a 2-MW Direct-Drive Wind Turbine for Low Wind Speed Sites; Northern Power Systems  

SciTech Connect

This fact sheet describes a subcontract with Northern Power Systems (NPS) to develop and evaluate a 2-MW wind turbine that could offer significant opportunities for reducing the cost of energy (COE).

2006-03-01T23:59:59.000Z

388

Coordinated operations of distributed wind generation in a distribution system using PMUs.  

E-Print Network (OSTI)

??Wind energy is becoming one of the most widely implemented forms of renewable energy worldwide. Traditionally, wind has been considered a non-dispatchable source of energy (more)

Vijayarengan, Manoaj Srikumar

2012-01-01T23:59:59.000Z

389

Integration of Wind Generation and Load Forecast Uncertainties into Power Grid Operations  

Science Conference Proceedings (OSTI)

In this paper, a new approach to evaluate the uncertainty ranges for the required generation performance envelope, including the balancing capacity, ramping capability and ramp duration is presented. The approach includes three stages: statistical and actual data acquisition, statistical analysis of retrospective information, and prediction of future grid balancing requirements for specified time horizons and confidence intervals. Assessment of the capacity and ramping requirements is performed using a specially developed probabilistic algorithm based on a histogram analysis incorporating all sources of uncertainty and parameters of a continuous (wind forecast and load forecast errors) and discrete (forced generator outages and failures to start up) nature. Preliminary simulations using California Independent System Operator (CAISO) real life data have shown the effectiveness and efficiency of the proposed approach.

Makarov, Yuri V.; Etingov, Pavel V.; Huang, Zhenyu; Ma, Jian; Chakrabarti, Bhujanga B.; Subbarao, Krishnappa; Loutan, Clyde; Guttromson, Ross T.

2010-04-20T23:59:59.000Z

390

New England Wind Forum: Wind Power Policy in New England  

Wind Powering America (EERE)

Projects in New England Building Wind Energy in New England Wind Resource Wind Power Technology Economics Markets Siting Policy Renewable Energy Portfolio Standards State Renewable Energy Funds Federal Tax Incentives and Grants Net Metering and Interconnection Standards Pollutant Emission Reduction Policies Awareness Technical Challenges Issues Small Wind Large Wind Newsletter Perspectives Events Quick Links to States CT MA ME NH RI VT Bookmark and Share Wind Power Policy in New England Why Incentives and Policy? Federal and state policies play an important role in encouraging wind energy development by leveling the playing field compared to other energy sources. Many of the substantial benefits of wind power as a domestic, zero-emission part of the energy portfolio - sustainability, displacement of pollutant emissions from other power sources, fuel diversity, price stabilization, keeping a substantial portion of energy expenditures in the local economy - are shared by society as a whole and cannot be readily captured by wind generators directly in the price they charge for their output. In addition, while wind power receives some policy support, the level of federal incentives for wind represents less than 1% of the subsidies and tax breaks given to the fossil fuels and nuclear industries (source: "Wind Power An Increasingly Competitive Source of New Generation." Wind Energy Weekly #1130.).

391

Voltage control scheme in distribution network with double feed induction generator wind farm  

Science Conference Proceedings (OSTI)

This paper presents the particle swarm optimization (PSO) for reactive power and voltage control (Volt/Var Control) in distribution system considering DFIG wind farm. In this paper, the reactive power output of DFIG wind farm has been considered as the ... Keywords: DFIG wind turbine, Volt/Var control, distribution network, optimization, particle swarm, wind farm

Jingjing Zhao; Xin Li; Jutao Hao

2009-08-01T23:59:59.000Z

392

Evaluation of the Flow Distortion around the Campbell Scientific CSAT3 Sonic Anemometer Relative to Incident Wind Direction  

Science Conference Proceedings (OSTI)

In June 2002, a high-frequency airsea momentum system was deployed in the surf zone for 3 days as part of an experiment to quantify airsea momentum transfer when the wind and wave direction were at angles. The system obtained measurements in ...

Harry C. Friebel; Thomas O. Herrington; Alexander Y. Benilov

2009-03-01T23:59:59.000Z

393

Unbalanced-grid-fault ride-through control for a doubly fed induction generator wind turbine with series grid-side converter  

Science Conference Proceedings (OSTI)

The grid codes now require doubly fed induction generator (DFIG) wind turbines having the "low voltage ride-through (LVRT)" capability. However, a traditional DFIG with a partially rated back-to-back converter has inherent difficulties to ride through ... Keywords: doubly fed induction generator (DFIG), low voltage ride-through (LVRT), series grid-side converter (SGSC), unbalanced grid fault, voltage dips, voltage sags, wind power generation, wind turbine

Yong Liao; Hui Li; Jun Yao

2011-02-01T23:59:59.000Z

394

ACEEE International Journal on Electrical and Power Engineering, Vol. 1, No. 2, July 2010 A Single Phase Induction Generator As Wind  

E-Print Network (OSTI)

, S Borowy, Ziyad M Salameh "Dynamic response of standalone wind energy conversion system with battery energy storage to a wind gust" IEEE transactions on Energy Conversion, Vo 12, No1 March 1997 10)M.Godoy Simoes, Sudipta Chakraborty, Robert Wood Induction generator for small wind energy system IEEE power Electronics

395

Use of Solar and Wind as a Physical Hedge against Price Variability within a Generation Portfolio  

DOE Green Energy (OSTI)

This study provides a framework to explore the potential use and incremental value of small- to large-scale penetration of solar and wind technologies as a physical hedge against the risk and uncertainty of electricity cost on multi-year to multi-decade timescales. Earlier studies characterizing the impacts of adding renewable energy (RE) to portfolios of electricity generators often used a levelized cost of energy or simplified net cash flow approach. In this study, we expand on previous work by demonstrating the use of an 8760 hourly production cost model (PLEXOS) to analyze the incremental impact of solar and wind penetration under a wide range of penetration scenarios for a region in the Western U.S. We do not attempt to 'optimize' the portfolio in any of these cases. Rather we consider different RE penetration scenarios, that might for example result from the implementation of a Renewable Portfolio Standard (RPS) to explore the dynamics, risk mitigation characteristics and incremental value that RE might add to the system. We also compare the use of RE to alternative mechanisms, such as the use of financial or physical supply contracts to mitigate risk and uncertainty, including consideration of their effectiveness and availability over a variety of timeframes.

Jenkin, T.; Diakov, V.; Drury, E.; Bush, B.; Denholm, P.; Milford, J.; Arent, D.; Margolis, R.; Byrne, R.

2013-08-01T23:59:59.000Z

396

Effects of Temporal Wind Patterns on the Value of Wind-Generated Electricity at Different Sites in California and the Northwest  

E-Print Network (OSTI)

towers or operational wind farms are needed to resolveapproach to locating wind farms in the UK. Renewablepower from potential wind farm locations in California and

Fripp, Matthias; Wiser, Ryan

2006-01-01T23:59:59.000Z

397

Analyzing the Effects of Temporal Wind Patterns on the Value of Wind-Generated Electricity at Different Sites in California and the Northwest  

E-Print Network (OSTI)

7 2.2.3 Wind Farm Production1. Rated Capacity of Wind Farms for which Monthly Productionpower from potential wind farm locations in California and

Fripp, Matthias; Wiser, Ryan

2006-01-01T23:59:59.000Z

398

Effects of Temporal Wind Patterns on the Value of Wind-Generated Electricity at Different Sites in California and the Northwest  

E-Print Network (OSTI)

1992). Capacity credit of wind power in the Netherlands. modeling as a tool for wind resource assessment andBurton, T. , et al. (2001). Wind Energy Handbook, John

Fripp, Matthias; Wiser, Ryan

2006-01-01T23:59:59.000Z

399

Analyzing the Effects of Temporal Wind Patterns on the Value of Wind-Generated Electricity at Different Sites in California and the Northwest  

E-Print Network (OSTI)

Energy Facilities. American Wind Energy Association (AWEA)21. Brower, M. 2002a. New Wind Energy Resource Maps ofand M. Schwartz. 1993. Wind Energy Potential in the United

Fripp, Matthias; Wiser, Ryan

2006-01-01T23:59:59.000Z

400

REQUEST FOR PROPOSALS FOR RENEWABLE ENERGY GENERATION (WIND AND SOLAR ONLY) FOR JEA JACKSONVILLE, FLORIDA  

NLE Websites -- All DOE Office Websites (Extended Search)

REQUEST FOR PROPOSALS FOR REQUEST FOR PROPOSALS FOR RENEWABLE ENERGY GENERATION (WIND AND SOLAR ONLY) FOR JEA JACKSONVILLE, FLORIDA MARCH 17, 2008 (RELEASED) MAY 16, 2008 (DUE DATE) 3/17/2008 1 TABLE OF CONTENTS TITLE SECTION REQUEST FOR PROPOSAL 1.0 INFORMATION AND INSTRUCTIONS TO BIDDERS I 2.0 PROPOSAL TECHNICAL AND PRICING REQUIREMENTS II 3.0 PROPOSAL TECHNICAL AND PRICING FORMS III 4.0 PROPOSAL TECHNICAL AND PRICING REQUIREMENTS AND IV FORMS (FOR SOLAR EQUIPMENT ONLY PROPOSALS) SUPPLEMENTAL FORMS: CONFLICT OF INTEREST FORM CONFIDENTIALITY AGREEMENT 3/17/2008 2 REQUEST FOR PROPOSALS SEALED PROPOSALS will be received for this RFP until: LOCAL TIME 5:00 PM DAY OF WEEK FRIDAY DATE MAY 16, 2008 Proposals must be received at the following address:

Note: This page contains sample records for the topic "direct wind generator" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

RECIPIENT:City of Ann Arbor PROJECT TITLE: Ann Arbor Wind Generator  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Ann Arbor Ann Arbor PROJECT TITLE: Ann Arbor Wind Generator " ) STATE: MI Funding Opportunity Announcement Number ProcurementInstrument Number NEPA Control Number CID Number DE-EE0000447 GFO-0000447-001 0 Based on my review oCthe information concerning the proposed action, as NEPA Compliance Officer (authorized under DOE Order 451.1A), I have made the following determination: CX, EA, EIS APPENDIX AND NUMBER: Description: A9 Information gathering (including, but not limited to, literature surveys, inventories, audits), data analysis (including computer modeling), document preparation (such as conceptual design or feasibility studies, analytical energy supply and demand studies), and dissemination (including, but not limited to, document mailings, publication, and distribution; and

402

Power System Modeling of 20% Wind-Generated Electricity by 2030: Preprint  

NLE Websites -- All DOE Office Websites (Extended Search)

Power System Modeling of 20% Power System Modeling of 20% Wind-Generated Electricity by 2030 Preprint M. Hand and N. Blair National Renewable Energy Laboratory M. Bolinger and R. Wiser Lawrence Berkeley National Laboratory R. O'Connell Black & Veatch T. Hern and B. Miller Western Resources Advocates To be presented at the Power Engineering Society 2008 General Meeting Pittsburgh, Pennsylvania July 20-24, 2008 Conference Paper NREL/CP-500-42794 June 2008 NREL is operated by Midwest Research Institute ● Battelle Contract No. DE-AC36-99-GO10337 NOTICE The submitted manuscript has been offered by an employee of the Midwest Research Institute (MRI), a contractor of the US Government under Contract No. DE-AC36-99GO10337. Accordingly, the US Government and MRI retain a nonexclusive royalty-free license to publish or reproduce the published form of

403

High Winds Generated by Bow Echoes. Part II: The Relationship between the Mesovortices and Damaging Straight-Line Winds  

Science Conference Proceedings (OSTI)

Airborne radar analysis of a mesovortex that developed near the apex of a bow echo is presented. The mesovortex was shown to play a critical role in determining the location of intense straight-line wind damage at the surface. The perturbation ...

Roger M. Wakimoto; Hanne V. Murphey; Christopher A. Davis; Nolan T. Atkins

2006-10-01T23:59:59.000Z

404

Observations of the Directional Distribution of Ocean-Wave Energy in Fetch-Limited Conditions  

Science Conference Proceedings (OSTI)

Directional energy distributions of wind-generated waves were observed with a relatively high directional resolution in fairly homogeneous and stationary wind fields in fetch-limited conditions using stereophotography of the sea surface. In a ...

L. H. Holthuijsen

1983-02-01T23:59:59.000Z

405

Power System Modeling of 20% Wind-Generated Electricity by 2030: Preprint  

DOE Green Energy (OSTI)

This paper shows the results of the Wind Energy Deployment System model used to estimate the costs and benefits associated with producing 20% of the nation's electricity from wind technology by 2030.

Hand, M.; Blair, N.; Bolinger, M.; Wiser, R.; O'Connell, R.; Hern, T.; Miller, B.

2008-06-01T23:59:59.000Z

406

Power System Modeling of 20% Wind-Generated Electricity by 2030: Preprint  

SciTech Connect

This paper shows the results of the Wind Energy Deployment System model used to estimate the costs and benefits associated with producing 20% of the nation's electricity from wind technology by 2030.

Hand, M.; Blair, N.; Bolinger, M.; Wiser, R.; O' Connell, R.; Hern, T.; Miller, B.

2008-06-01T23:59:59.000Z

407

Power and Frequency Control as it Relates to Wind-Powered Generation  

E-Print Network (OSTI)

turbine power if the wind is favorable at the moment and response provided by borrowing energy from the rotors

Lacommare, Kristina S H

2011-01-01T23:59:59.000Z

408

Effects of Temporal Wind Patterns on the Value of Wind-Generated Electricity at Different Sites in California and the Northwest  

E-Print Network (OSTI)

1992). Capacity credit of wind power in the Netherlands. the capacity credit of wind power in the presence ofSimulating Long-Term Wind- Power Output. Wind Engineering

Fripp, Matthias; Wiser, Ryan

2006-01-01T23:59:59.000Z

409

The ANEMOS Project: Next Generation Forecasting of Wind Power. G.Kariniotakis*  

E-Print Network (OSTI)

integration of wind energy in the developing liberalized electricity markets. Keywords - Wind power, short-resolution meteorological forecasts. For the offshore case, marine meteorology is considered as well as information will allow validation of the models and an analysis of the value of wind prediction for a competitive

Heinemann, Detlev

410

Analyzing the Effects of Temporal Wind Patterns on the Value of Wind-Generated Electricity at Different Sites in California and the Northwest  

E-Print Network (OSTI)

40, 70, and 100 m. Oklahoma Wind Power Initiative. OWPI.m sensor heights. Oklahoma Wind Power Initiative. Perez,

Fripp, Matthias; Wiser, Ryan

2006-01-01T23:59:59.000Z

411

Abstract--The use of doubly fed induction generators (DFIGs) in large wind energy conversion systems (WECS) has  

E-Print Network (OSTI)

1 Abstract--The use of doubly fed induction generators (DFIGs) in large wind energy conversion systems (WECS) has significantly increased during the last few years. The DFIG is interfaced to the AC to the AC grid during disturbances. The sensitivity of DFIGs to external faults has motivated researchers

Pota, Himanshu Roy

412

Abstract--In doubly fed induction generator (DFIG) based wind energy conversion systems (WECS), the DFIG is interfaced to the  

E-Print Network (OSTI)

Abstract--In doubly fed induction generator (DFIG) based wind energy conversion systems (WECS), the DFIG is interfaced to the AC network through grid side voltage source converter (GSC) and rotor side-link within permissible limits. The sensitivity of DFIG to external faults has motivated researchers

Pota, Himanshu Roy

413

Strategies for Refining IEC 61400-2: Wind Turbine Generator Systems - Part 2: Safety of Small Wind Turbines: Preprint  

SciTech Connect

This paper provides a status of the changes currently being made by IEC Maintenance Team 02 (MT02) to the existing IEC 61400-2 ''Safety of small wind turbines.'' In relation to the work done by IEC MT02, work has been done by NREL and Windward Engineering under the DOE/NREL Small Wind Turbine (SWT) Project. Aeroelastic models were built and measurements taken on a Whisper H40 turbine and an AOC 15/50. Results from this study were used to verify the simple design equations. This verification will be used to evaluate how changes made in the design load estimation section of the standard work out for a broad range of turbine configurations. The work presented here builds on work performed by Van Hulle (1996).

van Dam, J. J. D. (Energy Research Centre of the Netherlands); Forsyth, T. L. (National Renewable Energy Laboratory); Hansen, A. C. (Windward Engineering LLC)

2001-10-19T23:59:59.000Z

414

Wind Turbinie Generator System Power Performance Test Report for the Mariah Windspire 1-kW Wind Turbine  

DOE Green Energy (OSTI)

This report summarizes the results of a power performance test that NREL conducted on the Mariah Windspire 1-kW wind turbine. During this test, two configurations were tested on the same turbine. In the first configuration, the turbine inverter was optimized for power production. In the second configuration, the turbine inverter was set for normal power production. In both configurations, the inverter experienced failures and the tests were not finished.

Huskey, A.; Bowen, A.; Jager, D.

2009-12-01T23:59:59.000Z

415

Incorporating Wind Generation Forecast Uncertainty into Power System Operation, Dispatch, and Unit Commitment Procedures  

DOE Green Energy (OSTI)

In this paper, an approach to evaluate the uncertainties of the balancing capacity, ramping capability, and ramp duration requirements is proposed. The approach includes three steps: forecast data acquisition, statistical analysis of retrospective information, and prediction of grid balancing requirements for a specified time horizon and a given confidence level. Assessment of the capacity and ramping requirements is performed using a specially developed probabilistic algorithm based on histogram analysis, incorporating sources of uncertainty of both continuous (wind and load forecast errors) and discrete (forced generator outages and start-up failures) nature. A new method called the "flying-brick" technique is developed to evaluate the look-ahead required generation performance envelope for the worst case scenario within a user-specified confidence level. A self-validation process is used to validate the accuracy of the confidence intervals. To demonstrate the validity of the developed uncertainty assessment methods and its impact on grid operation, a framework for integrating the proposed methods with an EMS system is developed. Demonstration through integration with an EMS system illustrates the applicability of the proposed methodology and the developed tool for actual grid operation and paves the road for integration with EMS systems from other vendors.

Makarov, Yuri V.; Etingov, Pavel V.; Huang, Zhenyu; Ma, Jian; Subbarao, Krishnappa

2010-10-19T23:59:59.000Z

416

Incorporating Uncertainty of Wind Power Generation Forecast into Power System Operation, Dispatch, and Unit Commitment Procedures  

Science Conference Proceedings (OSTI)

An approach to evaluate the uncertainties of the balancing capacity, ramping capability, and ramp duration requirements is proposed. The approach includes three steps: forecast data acquisition, statistical analysis of retrospective information, and prediction of grid balancing requirements for a specified time horizon and a given confidence level. An assessment of the capacity and ramping requirements is performed using a specially developed probabilistic algorithm based on histogram analysis, incorporating sources of uncertainty - both continuous (wind and load forecast errors) and discrete (forced generator outages and start-up failures). A new method called the 'flying-brick' technique is developed to evaluate the look-ahead required generation performance envelope for the worst case scenario within a user-specified confidence level. A self-validation process is used to validate the accuracy of the confidence intervals. To demonstrate the validity of the developed uncertainty assessment methods and its impact on grid operation, a framework for integrating the proposed methods with an EMS system is developed. Demonstration through EMS integration illustrates the applicability of the proposed methodology and the developed tool for actual grid operation and paves the road for integration with EMS systems in control rooms.

Makarov, Yuri V.; Etingov, Pavel V.; Ma, Jian; Huang, Zhenyu; Subbarao, Krishnappa

2011-06-23T23:59:59.000Z

417

Electric power generating plant having direct-coupled steam and compressed-air cycles  

DOE Patents (OSTI)

An electric power generating plant is provided with a Compressed Air Energy Storage (CAES) system which is directly coupled to the steam cycle of the generating plant. The CAES system is charged by the steam boiler during off peak hours, and drives a separate generator during peak load hours. The steam boiler load is thereby levelized throughout an operating day.

Drost, M.K.

1981-01-07T23:59:59.000Z

418

Electric power generating plant having direct coupled steam and compressed air cycles  

DOE Patents (OSTI)

An electric power generating plant is provided with a Compressed Air Energy Storage (CAES) system which is directly coupled to the steam cycle of the generating plant. The CAES system is charged by the steam boiler during off peak hours, and drives a separate generator during peak load hours. The steam boiler load is thereby levelized throughout an operating day.

Drost, Monte K. (Richland, WA)

1982-01-01T23:59:59.000Z

419

Comparing Pulsed Doppler LIDAR with SODAR and Direct Measurements for Wind Assessment  

DOE Green Energy (OSTI)

There is a pressing need for good wind-speed measurements at greater and greater heights to assess the availability of the resource in terms of power production and to identify any frequently occurring atmospheric structural characteristics that may create turbulence that impacts the operational reliability and lifetime of wind turbines and their components. In this paper, we summarize the results of a short study that compares the relative accuracies of wind speeds derived from a high-resolution pulsed Doppler LIDAR operated by the National Oceanic and Atmospheric Administration (NOAA) and a midrange Doppler SODAR with wind speeds measured by four levels of tower-based sonic anemometry up to a height of 116 m.

Kelley, N. D.; Jonkman, B. J.; Scott, G. N.; Pichugina, Y. L.

2007-07-01T23:59:59.000Z

420

Prediction of Wind Speed, Direction and Diffusivity under Neutral Conditions for Tall Stacks  

Science Conference Proceedings (OSTI)

A one dimensional model of the neutral planetary boundary layer is used to predict the wind velocity and coefficient of eddy diffusivity throughout the 2-km planetary boundary layer. Comparison with routine radiosonde observations show that at ...

Nirupama Raghavan; Swati Basu

1988-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "direct wind generator" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Dynamic Simulation Studies of the Frequency Response of the Three U.S. Interconnections with Increased Wind Generation  

SciTech Connect

Utility Systems Efficiencies, Inc. was tasked by Lawrence Berkeley National Laboratory (LBNL) to conduct dynamic simulation studies of the three U.S. interconnections (Eastern, Western, and Texas). The simulations were prepared in support of LBNL's project for the Federal Energy Regulatory Commission to study frequency-response-related issues that must be addressed to operate the power system reliably with large amounts of variable renewable generation. The objective of the simulation studies of each interconnection was to assess the effects of different amounts of wind generation on frequency behavior of each interconnection following a sudden loss of generation. The scenarios created to study these effects considered an operating circumstance in which system load is at or close to its minimum. The event studied was the sudden loss of the largest amount of generation recorded within each interconnection. The simulations calculated the impact of this event on interconnection frequency for three levels of wind generation. In addition to varying the amount of wind generation, the simulations varied the amount of operating reserves between a high level representative of current operating practices and a low level representative of the minimum required by present operating rules.

Mackin, Peter; Daschmans, R.; Williams, B.; Haney, B.; Hung, R.; Ellis, J.

2010-12-20T23:59:59.000Z

422

Dynamic Simulation Studies of the Frequency Response of the Three U.S. Interconnections with Increased Wind Generation  

SciTech Connect

Utility Systems Efficiencies, Inc. was tasked by Lawrence Berkeley National Laboratory (LBNL) to conduct dynamic simulation studies of the three U.S. interconnections (Eastern, Western, and Texas). The simulations were prepared in support of LBNL's project for the Federal Energy Regulatory Commission to study frequency-response-related issues that must be addressed to operate the power system reliably with large amounts of variable renewable generation. The objective of the simulation studies of each interconnection was to assess the effects of different amounts of wind generation on frequency behavior of each interconnection following a sudden loss of generation. The scenarios created to study these effects considered an operating circumstance in which system load is at or close to its minimum. The event studied was the sudden loss of the largest amount of generation recorded within each interconnection. The simulations calculated the impact of this event on interconnection frequency for three levels of wind generation. In addition to varying the amount of wind generation, the simulations varied the amount of operating reserves between a high level representative of current operating practices and a low level representative of the minimum required by present operating rules.

Mackin, Peter; Daschmans, R.; Williams, B.; Haney, B.; Hung, R.; Ellis, J.

2010-12-20T23:59:59.000Z

423

Distributed Wind Energy in Idaho  

SciTech Connect

Project Objective: This project is a research and development program aimed at furthering distributed wind technology. In particular, this project addresses some of the barriers to distributed wind energy utilization in Idaho. Background: At its core, the technological challenge inherent in Wind Energy is the transformation of a highly variable form of energy to one which is compatible with the commercial power grid or another useful application. A major economic barrier to the success of distributed wind technology is the relatively high capital investment (and related long payback periods) associated with wind turbines. This project will carry out fundamental research and technology development to address both the technological and economic barriers. â?¢ Active drive train control holds the potential to improve the overall efficiency of a turbine system by allowing variable speed turbine operation while ensuring a tight control of generator shaft speed, thus greatly simplifying power conditioning. â?¢ Recent blade aerodynamic advancements have been focused on large, utility-scale wind turbine generators (WTGs) as opposed to smaller WTGs designed for distributed generation. Because of Reynolds Number considerations, blade designs do not scale well. Blades which are aerodynamically optimized for distributed-scale WTGs can potentially reduce the cost of electricity by increasing shaft-torque in a given wind speed. â?¢ Grid-connected electric generators typically operate at a fixed speed. If a generator were able to economically operate at multiple speeds, it could potentially convert more of the windâ??s energy to electricity, thus reducing the cost of electricity. This research directly supports the stated goal of the Wind and Hydropower Technologies Program for Distributed Wind Energy Technology: By 2007, reduce the cost of electricity from distributed wind systems to 10 to 15 cents/kWh in Class 3 wind resources, the same level that is currently achievable in Class 5 winds.

Gardner, John; Ferguson, James; Ahmed-Zaid, Said; Johnson, Kathryn; Haynes, Todd; Bennett, Keith

2009-01-31T23:59:59.000Z

424

New England Wind Forum: Wind Compared to the Cost of Other Electricity  

Wind Powering America (EERE)

Wind Compared to the Cost of Other Electricity Generation Options Wind Compared to the Cost of Other Electricity Generation Options Figure 1: Average Cumulative Wind and Wholesale Power Prices by Region The chart shows average cumulative wind and wholesale power prices by region. Click on the graph to view a larger version. View a larger version of the graph. In terms of direct costs, larger wind farms in windier areas are now considered economically competitive with "conventional" fossil fuel power plants in many locations. In New England, direct costs for wind power at larger sites with strong winds are approaching the cost of alternatives, particularly given the recent high natural gas and oil prices. Figure 1 compares wind contract prices1 with wholesale electricity market prices in different U.S. regions for 2006. Although not directly comparable to wind prices due to wind's production timing and intermittence, the value of wind Renewable Energy Credits and carbon offsets, and the cost of wind integration and transmission, the average wholesale market energy price is a good indicator of the cost of alternative generation options. This graph demonstrates several points:

425

Power System Modeling of 20% Wind-Generated Electricity by 2030 (Presentation)  

DOE Green Energy (OSTI)

This presentation describes the methods used to analyze the potential for provided 20% of our nation's electricity demand with wind energy by 2030

Hand, M.; Blair, N.; Bolinger, M.; Wiser, R.; O'Connell, R.; Hern, T.; Miller, B.

2008-07-01T23:59:59.000Z

426

Power System Modeling of 20percent Wind-Generated Electricity by 2030  

E-Print Network (OSTI)

price elasticity of natural gas supply of 1.2; low and highfor natural gas, wind power may relieve gas supply pressures

Hand, Maureen

2008-01-01T23:59:59.000Z

427

National Renewable Energy Laboratory program on lightning risk and wind turbine generator protection  

DOE Green Energy (OSTI)

This paper will describe the NREL program for addressing lightning protection for wind turbines. A test program will begin this summer at the Central and South West Services Inc. (CSW) wind farm near Fort Davis, Texas, to assess lightning risk, the frequency of lightning strikes on wind turbines compared to risk assessment predictions, and the effectiveness of some protection techniques. A Web page will be assembled to provide resources for designers and operators and feedback for issues as they arise. Also, a database of lightning events (and corresponding damage) will be collected to assist in maturing the understanding of wind turbine lightning protection.

Muljadi, E. [National Renewable Energy Lab., Golden, CO (United States); McNiff, B. [McNiff Light Industry, Blue Hill, ME (United States)

1997-09-01T23:59:59.000Z

428

Real-time digital control of DFIG-based wind generators for grid support.  

E-Print Network (OSTI)

??In this thesis, a set of new converter /control techniques are developed for the Grid Side and Rotor Side converter applications in DFIG wind power (more)

Mesbah, Mohsen

2012-01-01T23:59:59.000Z

429

Higher wind generation in the Southwest Power Pool is reducing use ...  

U.S. Energy Information Administration (EIA)

A more accurate estimate of baseload service also considers the hourly output of variable energy resources, such as wind, solar, and hydro under certain circumstances.

430

Power System Modeling of 20% Wind-Generated Electricity by 2030 (Presentation)  

SciTech Connect

This presentation describes the methods used to analyze the potential for provided 20% of our nation's electricity demand with wind energy by 2030

Hand, M.; Blair, N.; Bolinger, M.; Wiser, R.; O' Connell, R.; Hern, T.; Miller, B.

2008-07-01T23:59:59.000Z

431

Monitoring and Regression Based Modelling of End Winding Vibration in Large Synchronous Generators.  

E-Print Network (OSTI)

?? This research project was set up to monitor, on an ongoing basis, the condition of the end windings and their support structures of a (more)

Shally, David, [Thesis

2012-01-01T23:59:59.000Z

432

Combination, a model vehicle engine and a direct-current generator  

SciTech Connect

This patent describes an engine for a model vehicle and a direct-current generator, comprising: an internal-combustion engine; and a direct-current generator operatively coupled to the engine; wherein the generator comprises an armature, and a drive coupling member drivingly engaged with the armature; the armature has three poles; each of the poles has not less than six hundred turns of magnetic wire; the engine having first means comprising a crankshaft, and second means comprising a connecting rod; and one of the first a second means has means for drivingly engaging the drive coupling for imparting rotation to the generator from the engine.

Williams, G.A.

1987-01-20T23:59:59.000Z

433

Power and Frequency Control as it Relates to Wind-Powered Generation  

E-Print Network (OSTI)

The work described in this report was funded by the Federal Energy Regulatory Commission, Office of Electric Reliability through a subcontract administered by the Lawrence Berkeley National Laboratory, which is operated by the University of California for the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. Disclaimer This document was prepared as an account of work sponsored by the United States Government. While this document is believed to contain correct information, neither the United States Government nor any agency thereof, nor The Regents of the University of California, nor any of their employees, makes any warranty, express or implied, or assumes any legal responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by its trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof, or The Regents of the University of California. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof, or The Regents of the University of California. Ernest Orlando Lawrence Berkeley National Laboratory is an equal opportunity employer. Power and Frequency Control as it Relates to Wind-Powered Generation

Ernest Orlando Lawrence; John Undrill; John Undrill Llc; John Undrill; John Undrill Llc

2010-01-01T23:59:59.000Z

434

A Spin-down Power Threshold for Pulsar Wind Nebula Generation?  

E-Print Network (OSTI)

A systematic X-ray survey of the most energetic rotation-powered pulsars known, based on spin-down energy loss rate, $\\dot E$ = $I\\omega\\dot\\omega$, shows that all energetic pulsars with $\\dot E > \\dot E_{c} \\approx 3.4 \\times\\ 10^{36}$ erg s$^{-1}$ are X-ray bright, manifest a distinct pulsar wind nebula (PWN), and are associated with a supernova event, either historically or via a thermal remnant, with over half residing in shell-like supernova remnants. Below $\\dot E_c$, the 2-10 keV PWN flux ratio $F_{PWN}/F_{PSR}$ decreases by an order-of-magnitude. This threshold is predicted by the lower limit on the spectral slope $\\Gamma_{min} \\approx 0.5$ observed for rotation-powered pulsars (Gotthelf 2003). The apparent lack of bright pulsar nebulae below a critical Edot suggests a change in the particle injection spectrum and serves as a constraint on emission models for rotation-powered pulsars. Neither a young age nor a high density environment is found to be a sufficient condition for generating a PWN, as often suggested, instead the spin-down energy loss rate is likely the key parameter in determining the evolution of a rotation-powered pulsar.

E. V. Gotthelf

2006-10-12T23:59:59.000Z

435

The Inside of a Wind Turbine | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

The Inside of a Wind Turbine The Inside of a Wind Turbine The Inside of a Wind Turbine 1 of 17 Tower: 2 of 17 Tower: Made from tubular steel (shown here), concrete, or steel lattice. Supports the structure of the turbine. Because wind speed increases with height, taller towers enable turbines to capture more energy and generate more electricity. Generator: 3 of 17 Generator: Produces 60-cycle AC electricity; it is usually an off-the-shelf induction generator. High-speed shaft: 4 of 17 High-speed shaft: Drives the generator. Nacelle: 5 of 17 Nacelle: Sits atop the tower and contains the gear box, low- and high-speed shafts, generator, controller, and brake. Some nacelles are large enough for a helicopter to land on. Wind vane: 6 of 17 Wind vane: Measures wind direction and communicates with the yaw drive to orient the

436

Model Study of Waves Generated by Convection with Direct Validation via Satellite  

Science Conference Proceedings (OSTI)

Atmospheric gravity waves have a major effect on atmospheric circulation, structure, and stability on a global scale. Gravity waves can be generated by convection, but in many cases it is difficult to link convection directly to a specific wave ...

Alison W. Grimsdell; M. Joan Alexander; Peter T. May; Lars Hoffmann

2010-05-01T23:59:59.000Z

437

A validation of a ray-tracing tool used to generate bi-directional...  

NLE Websites -- All DOE Office Websites (Extended Search)

A validation of a ray-tracing tool used to generate bi-directional scattering distribution functions for complex fenestration systems Title A validation of a ray-tracing tool used...

438

Neutral Solar Wind Generated by Lunar Exospheric Dust at the Terminator  

E-Print Network (OSTI)

We calculate the flux of neutral solar wind observed on the lunar surface at the terminator due to solar wind protons penetrating exospheric dust grains with (1) radii greater than 0.1 microns and (2) radii greater than 0.01 microns. For grains with radii larger than 0.1 microns, the ratio of the neutral solar wind flux produced by exospheric dust to the incident ionized solar wind flux is estimated to be about 10^-4-10^-3 for solar wind speeds in excess of 800 km/s, but much lower (less than 10^-5) at average to slow solar wind speeds. However, when the smaller grain sizes are considered, this ratio is estimated to be greater than 10^-5 at all speeds, and at speeds in excess of 700 km/s reaches about 10^-3. These neutral solar wind fluxes are easily measurable with current low energy neutral atom instrumentation. Observations of neutral solar wind from the surface of the Moon would provide independent information on the distribution of very small dust grains in the lunar exosphere that would complement and c...

Collier, Michael R

2008-01-01T23:59:59.000Z

439

Experience and assessment of the DOE-NASA Mod-1 2000-kilowatt wind turbine generator at Boone, North Carolina  

SciTech Connect

The broad objectives of the Mod-1 program are defined, including the background information leading to the inception of the program. Activities on the Mod-1 program began in 1974, and the turbine was dedicated in July 1979. Rated power generation was accomplished in February 1980. The Mod-1 wind turbine is described in this report. In addition to the steel blade operated on the wind turbine, a composite blade was designed and manufactured. During the early phase of the manufacturing cycle a Mod-1A configuration was designed that identified concepts such as partial span control, a soft tower, and upwind teetered rotors that have been incorporated in second- and third-generation industry designs. The Mod-1 electrical system performed as designed, with voltage flicker characteristics within acceptable utility limits. Power output versus wind speed has equaled or exceeded design predictions. The wind turbine control system was operated successfully at the site and remotely from the utility dispatcher's office in Lenior, NC. During wind turbine operations, television interference was experienced by the local residents. As a consequence, operations were restricted. Although not implemented, two potential solutions were identified. In addition to television interference, a few local residents complained about objectionable sound, particularly the thump as the blade passed behind the tower. To eliminate the residents' objections, the sound generation level was reduced by 10 dB by reducing the rotor speed from 35 rpm to 23 rpm. During January 1981, bolts in the drive train fractured. A solution has been identified but not implemented as yet. During the past 2 years the public reaction toward the Mod-1 Turbine program has been overwhelmingly favorable. This includes the vast majority of Boone residents.

Collins, J.L.; Shaltens, R.K.; Poor, R.H.; Barton, R.S.

1982-04-01T23:59:59.000Z

440

Effects of Temporal Wind Patterns on the Value of Wind-Generated Electricity at Different Sites in California and the Northwest  

E-Print Network (OSTI)

T. , et al. (2001). Wind Energy Handbook, John Wiley & Sons.optimal planning for wind energy conversion systems over59-71. Brower, M. (2002a). New Wind Energy Resource Maps of

Fripp, Matthias; Wiser, Ryan

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "direct wind generator" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Effects of Temporal Wind Patterns on the Value of Wind-Generated Electricity in California and the Northwest  

E-Print Network (OSTI)

of renewable energy policies, and on the costs, benefits,renewable energy in integrated resource planning; the costRenewable Generation Integration Cost Analysis Phase III: Recommendations For Implementation," California Energy

Wiser, Ryan H

2008-01-01T23:59:59.000Z

442

NREL Controllable Grid Interface for Testing MW-Scale Wind Turbine Generators (Poster)  

DOE Green Energy (OSTI)

In order to understand the behavior of wind turbines experiencing grid disturbances, it is necessary to perform a series of tests and accurate transient simulation studies. The latest edition of the IEC 61400-21 standard describes methods for such tests that include low voltage ride-through (LVRT), active power set-point control, ramp rate limitations, and reactive power capability tests. The IEC methods are being widely adopted on both national and international levels by wind turbine manufacturers, certification authorities, and utilities. On-site testing of wind turbines might be expensive and time consuming since it requires both test equipment transportation and personnel presence in sometimes remote locations for significant periods of time because such tests need to be conducted at certain wind speed and grid conditions. Changes in turbine control software or design modifications may require redoing of all tests. Significant cost and test-time reduction can be achieved if these tests are conducted in controlled laboratory environments that replicate grid disturbances and simulation of wind turbine interactions with power systems. Such testing capability does not exist in the United States today. An initiative by NREL to design and construct a 7-MVA grid simulator to operate with the existing 2.5 MW and new upcoming 5-MW dynamometer facilities will fulfill this role and bring many potential benefits to the U.S. wind industry with the ultimate goal of reducing wind energy integration costs.

McDade, M.; Gevorgian, V.; Wallen, R.; Erdman, W.

2013-04-01T23:59:59.000Z

443

New England Wind Forum: Wind Power Economics  

Wind Powering America (EERE)

State Activities Projects in New England Building Wind Energy in New England Wind Resource Wind Power Technology Economics Cost Components Determining Factors Influencing Wind Economics in New England How does wind compare to the cost of other electricity options? Markets Siting Policy Technical Challenges Issues Small Wind Large Wind Newsletter Perspectives Events Quick Links to States CT MA ME NH RI VT Bookmark and Share Wind Power Economics Long-Term Cost Trends Since the first major installations of commercial-scale wind turbines in the 1980s, the cost of energy from wind power projects has decreased substantially due to larger turbine generators, towers, and rotor lengths; scale economies associated with larger projects; improvements in manufacturing efficiency, and technological advances in turbine generator and blade design. These technological advances have allowed for higher generating capacities per turbine and more efficient capture of wind, especially at lower wind speeds.

444

Abstract--Wind power generation is growing rapidly. However, maintaining the wind turbine connection to grid is a real  

E-Print Network (OSTI)

induction generator (DFIG). However, no attention has been given to the impact of internal faults) that interface the DFIG with the grid. This paper investigates the impact of the rotor side converter (RSC) IGBT flashover fault on the common coupling (PCC) reactive power and the FRT capability of the DFIG. A proper

Pota, Himanshu Roy

445

Control of a wind park with doubly fed induction generators in support of power system stability in case of grid faults  

E-Print Network (OSTI)

(DFIG) con- cept, which facilitates fault ride through of large DFIG wind farms and enables them, that the here presented control strategy of DFIG wind parks even facilitates a fault ride through of nearby parks based on the doubly fed induc- tion generator (DFIG) concept, which facilitates fault ride through

446

Wind Energy Technologies  

Energy.gov (U.S. Department of Energy (DOE))

Wind energy technologies use the energy in wind for practical purposes such as generating electricity, charging batteries, pumping water, and grinding grain.

447

Development and Implementation of Wind-Generated Ocean Surface Wave Modelsat NCEP  

Science Conference Proceedings (OSTI)

A brief historical overview of numerical wind wave forecast modeling efforts at the National Centers for Environmental Prediction (NCEP) is presented, followed by an in-depth discussion of the new operational National Oceanic and Atmospheric ...

Hendrik L. Tolman; Bhavani Balasubramaniyan; Lawrence D. Burroughs; Dmitry V. Chalikov; Yung Y. Chao; Hsuan S. Chen; Vera M. Gerald

2002-04-01T23:59:59.000Z

448

Power System Modeling of 20percent Wind-Generated Electricity by 2030  

E-Print Network (OSTI)

~11%) reduction in natural gas demand in the United StatesB. Natural Gas Price Reduction Offsetting demand for naturalFinally, by reducing demand for natural gas, wind power may

Hand, Maureen

2008-01-01T23:59:59.000Z

449

Wind and solar powered turbine  

SciTech Connect

A power generating station having a generator driven by solar heat assisted ambient wind is disclosed. A first plurality of radially extending air passages direct ambient wind to a radial flow wind turbine disposed in a centrally located opening in a substantially disc-shaped structure. A solar radiation collecting surface having black bodies is disposed above the first plurality of air passages and in communication with a second plurality of radial air passages. A cover plate enclosing the second plurality of radial air passages is transparent so as to permit solar radiation to effectively reach the black bodies. The second plurality of air passages direct ambient wind and thermal updrafts generated by the black bodies to an axial flow turbine which also derives additional motive power from the air mass exhausted by the radial flow turbine. The rotating shaft of the turbines drive the generator. The solar and wind driven power generating system operates in electrical cogeneration mode with a fuel powered prime mover. The system is particularly adapted to satisfy the power requirements of a relatively small community located in a geographic area having favorable climatic conditions for wind and solar powered power generation.

Wells, I.D.; Holmes, M.; Kohn, J.L.

1984-02-28T23:59:59.000Z

450

Topic 5: Power System Operation and Planning for Enhanced Wind Generation Penetration  

Science Conference Proceedings (OSTI)

This project dealt with the development of a range of educational resources dealing with wind energy and wind energy integration in the electric grid. These resources were developed for a variety of audiences including; a) high school student, b) undergraduate electrical engineering students, c) graduate electrical engineering students, and d) practicing engineers in industry. All the developed material is available publicly and the courses developed are being taught at the two participating universities, Arizona State University and Iowa State University.

Vittal, Vijay; Heydt, Gerald T; Ayyanar, Raja; McCalley, James D; Ajjarapu, V; Aliprantis, Dionysios

2012-08-31T23:59:59.000Z

451

Analysis of the value of battery storage with wind and photovoltaic generation to the Sacramento Municipal Utility District  

DOE Green Energy (OSTI)

This report describes the results of an analysis to determine the economic and operational value of battery storage to wind and photovoltaic (PV) generation technologies to the Sacramento Municipal Utility District (SMUD) system. The analysis approach consisted of performing a benefit-cost economic assessment using established SMUD financial parameters, system expansion plans, and current system operating procedures. This report presents the results of the analysis. Section 2 describes expected wind and PV plant performance. Section 3 describes expected benefits to SMUD associated with employing battery storage. Section 4 presents preliminary benefit-cost results for battery storage added at the Solano wind plant and the Hedge PV plant. Section 5 presents conclusions and recommendations resulting from this analysis. The results of this analysis should be reviewed subject to the following caveat. The assumptions and data used in developing these results were based on reports available from and interaction with appropriate SMUD operating, planning, and design personnel in 1994 and early 1995 and are compatible with financial assumptions and system expansion plans as of that time. Assumptions and SMUD expansion plans have changed since then. In particular, SMUD did not install the additional 45 MW of wind that was planned for 1996. Current SMUD expansion plans and assumptions should be obtained from appropriate SMUD personnel.

Zaininger, H.W. [Zaininger Engineering Co., Inc., Roseville, CA (United States)

1998-08-01T23:59:59.000Z

452

Design and Test of DC Voltage Link Conversion System and Brushless Doubly-Fed Induction Generator for Variable-Speed Wind Energy Applications: August 1999--May 2003  

SciTech Connect

This report describes four low-cost alternative power converters for processing the power developed by a doubly fed wound-rotor induction generator for wind energy conversion systems.

Lipo, T.A.; Panda, D.; Zarko, D.

2005-11-01T23:59:59.000Z

453

Analysis of the Impact of Balancing Area Cooperation on the Operation of the Western Interconnection with Wind and Solar Generation (Presentation)  

DOE Green Energy (OSTI)

This presentation describes the analysis of the impact of balancing area cooperation on the operation of the Western Interconnection with wind and solar generation, including a discussion of operating reserves, ramping, production simulation, and conclusions.

Milligan, M.; Lew, D.; Jordan, G.; Piwko, R.; Kirby, B.; King, J.; Beuning, S.

2011-05-01T23:59:59.000Z

454

Optimal sizing study of hybrid wind/PV/diesel power generation unit  

Science Conference Proceedings (OSTI)

In this paper, a methodology of sizing optimization of a stand-alone hybrid wind/PV/diesel energy system is presented. This approach makes use of a deterministic algorithm to suggest, among a list of commercially available system devices, the optimal number and type of units ensuring that the total cost of the system is minimized while guaranteeing the availability of the energy. The collection of 6 months of data of wind speed, solar radiation and ambient temperature recorded for every hour of the day were used. The mathematical modeling of the main elements of the hybrid wind/PV/diesel system is exposed showing the more relevant sizing variables. A deterministic algorithm is used to minimize the total cost of the system while guaranteeing the satisfaction of the load demand. A comparison between the total cost of the hybrid wind/PV/diesel energy system with batteries and the hybrid wind/PV/diesel energy system without batteries is presented. The reached results demonstrate the practical utility of the used sizing methodology and show the influence of the battery storage on the total cost of the hybrid system. (author)

Belfkira, Rachid; Zhang, Lu; Barakat, Georges [Groupe de Recherche en Electrotechnique et Automatique du Havre, University of Le Havre, 25 rue Philippe Lebon, BP 1123, 76063 Le Havre (France)

2011-01-15T23:59:59.000Z

455

A computational framework for uncertainty quantification and stochastic optimization in unit commitment with wind power generation.  

Science Conference Proceedings (OSTI)

We present a computational framework for integrating a state-of-the-art numerical weather prediction (NWP) model in stochastic unit commitment/economic dispatch formulations that account for wind power uncertainty. We first enhance the NWP model with an ensemble-based uncertainty quantification strategy implemented in a distributed-memory parallel computing architecture. We discuss computational issues arising in the implementation of the framework and validate the model using real wind-speed data obtained from a set of meteorological stations. We build a simulated power system to demonstrate the developments.

Constantinescu, E. M; Zavala, V. M.; Rocklin, M.; Lee, S.; Anitescu, M. (Mathematics and Computer Science); (Univ. of Chicago); (New York Univ.)

2011-02-01T23:59:59.000Z

456

Analyzing the Effects of Temporal Wind Patterns on the Value ofWind-Generated Electricity at Different Sites in California and theNorthwest  

DOE Green Energy (OSTI)

Wind power production varies on a diurnal and seasonal basis. In this report, we use wind speed data modeled by TrueWind Solutions, LLC (now AWS Truewind) to assess the effects of wind timing on the value of electric power from potential wind farm locations in California and the Northwest. (Data from this dataset are referred to as ''TrueWind data'' throughout this report.) The intra-annual wind speed variations reported in the TrueWind datasets have not previously been used in published work, however, so we also compare them to a collection of anemometer wind speed measurements and to a limited set of actual wind farm production data. The research reported in this paper seeks to answer three specific questions: (1) How large of an effect can the temporal variation of wind power have on the value of wind in different wind resource areas? (2) Which locations are affected most positively or negatively by the seasonal and diurnal timing of wind speeds? (3) How compatible are wind resources in the Northwest and California with wholesale power prices and loads in either region? The latter question is motivated by the fact that wind power projects in the Northwest could sell their output into California (and vice versa), and that California has an aggressive renewable energy policy that may ultimately yield such imports. Based on our research, we reach three key conclusions. (1) Temporal patterns have a moderate impact on the wholesale market value of wind power and a larger impact on the capacity factor during peak hours. The best-timed wind power sites have a wholesale market value that is up to 4 percent higher than the average market price, while the worst-timed sites have a market value that is up to 11 percent below the average market price. The best-timed wind sites could produce as much as 30-40 percent more power during peak hours than they do on average during the year, while the worst timed sites may produce 30-60 percent less power during peak hours. (2) Northwestern markets appear to be well served by Northwestern wind and poorly served by California wind; results are less clear for California markets. Both the modeled TrueWind data and the anemometer data indicate that many Northwestern wind sites are reasonably well-matched to the Northwest's historically winter-peaking wholesale electricity prices and loads, while most California sites are poorly matched to these prices and loads. However, the TrueWind data indicate that most California and Northwestern wind sites are poorly matched to California's summer-afternoon-peaking prices and loads, while the anemometer data suggest that many of these same sites are well matched to California's wholesale prices and loads. (3) TrueWind and anemometer data agree about wind speeds in most times and places, but disagree about California's summer afternoon wind speeds: The TrueWind data indicate that wind speeds at sites in California's coastal mountains and some Northwestern locations dip deeply during summer days and stay low through much of the afternoon. In contrast, the anemometer data indicate that winds at these sites begin to rise during the afternoon and are relatively strong when power is needed most. At other times and locations, the two datasets show good agreement. This disagreement may be due in part to time-varying wind shear between the anemometer heights (20-25m) and the TrueWind reference height (50m or 70m), but may also be due to modeling errors or data collection inconsistencies.

Fripp, Matthias; Wiser, Ryan

2006-05-31T23:59:59.000Z

457

Swell and Slanting-Fetch Effects on Wind Wave Growth  

Science Conference Proceedings (OSTI)

Wind-sea generation was observed during two experiments off the coast of North Carolina. One event with offshore winds of 911 m s?1 directed 20 from shore normal was observed with eight directional stations recording simultaneously and spanning ...

Fabrice Ardhuin; T. H. C. Herbers; Kristen P. Watts; Gerbrant Ph van Vledder; R. Jensen; Hans C. Graber

2007-04-01T23:59:59.000Z

458

Wind: wind speed and wind power density GIS data at 10m and 50m...  

Open Energy Info (EERE)

data files of wind speed and wind power density at 10 and 50 m heights. Global data of offshore wind resource as generated by NASA's QuikScat SeaWinds scatterometer.

...

459

Wind: wind speed and wind power density maps at 10m and 50m above...  

Open Energy Info (EERE)

data files of wind speed and wind power density at 10 and 50 m heights. Global data of offshore wind resource as generated by NASA's QuikSCAT SeaWinds scatterometer.

...

460

Impacts of Large-Scale Wind Generators Penetration on the Voltage Stability of Power Systems  

E-Print Network (OSTI)

by 2020 and 300 GW of installed wind power capacity in Europe by 2030. An overview of the historical to make energy available economically with reduced carbon emission using renewable energy sources-limiting factor. FACTS controllers have been used for solving various power system steady-state control problems

Pota, Himanshu Roy

Note: This page contains sample records for the topic "direct wind generator" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Hybrid Electro-Mechanical Simulation Tool for Wind Turbine Generators: Preprint  

DOE Green Energy (OSTI)

This paper describes the use of MATLAB/Simulink to simulate the electrical and grid-related aspects of a WTG and the FAST aero-elastic wind turbine code to simulate the aerodynamic and mechanical aspects of the WTG. The combination of the two enables studies involving both electrical and mechanical aspects of the WTG.

Singh, M.; Muljadi, E.; Jonkman, J.

2013-05-01T23:59:59.000Z

462

Detection of Breaking Events in a Wind-Generated Wave Field  

Science Conference Proceedings (OSTI)

Measurements were made of the surface elevation of a fetch-limited wave field (fetch 7 km, wind speed about 6 m s?1). Good high-frequency response was attained by the use of a very thin, bare wire probe of diameter 0.13 mm. Breaking waves were ...

M. A. Weissman; S. S. Ataktrk; K. B. Katsaros

1984-10-01T23:59:59.000Z

463

Effects of Temporal Wind Patterns on the Value of Wind-Generated Electricity at Different Sites in California and the Northwest  

E-Print Network (OSTI)

or production data from tall towers are needed before we canmore data from tall anemometer towers or operational wind

Fripp, Matthias; Wiser, Ryan

2006-01-01T23:59:59.000Z

464

On the Heating of the Solar Corona and the Acceleration of the Low-Speed Solar Wind by Acoustic Waves Generated in Corona  

E-Print Network (OSTI)

We investigate possibilities of solar coronal heating by acoustic waves generated not at the photosphere but in the corona, aiming at heating in the mid- to low-latitude corona where the low-speed wind is expected to come from. Acoustic waves of period tau ~ 100s are triggered by chromospheric reconnection, one model of small scale magnetic reconnection events recently proposed by Sturrock. These waves having a finite amplitude eventually form shocks to shape sawtooth waves (N-waves), and directly heat the surrounding corona by dissipation of their wave energy. Outward propagation of the N-waves is treated based on the weak shock theory, so that the heating rate can be evaluated consistently with physical properties of the background coronal plasma without setting a dissipation length in an ad hoc manner. We construct coronal structures from the upper chromosphere to the outside of 1AU for various inputs of the acoustic waves having a range of energy flux of F_{w,0} = (1-20) times 10^5 erg cm^{-2} s^{-1} and a period of tau = 60-300s. The heating by the N-wave dissipation effectively works in the inner corona and we find that the waves of F_{w,0} >= 2 times 10^5 erg cm^{-2} s^{-1} and tau >= 60s could maintain peak coronal temperature, T_{max} > 10^6 K. The model could also reproduce the density profile observed in the streamer region. However, due to its short dissipation length, the location of T_{max} is closer to the surface than the observation, and the resultant flow velocity of the solar wind is lower than the observed profile of the low-speed wind. The cooperations with other heating and acceleration sources with the larger dissipation length are inevitable to reproduce the real solar corona.

Takeru Ken Suzuki

2002-06-14T23:59:59.000Z

465

DYNAMIC SIMULATION OF MONO-TUBE CAVITY RECEIVERS FOR DIRECT STEAM GENERATION  

E-Print Network (OSTI)

-tracing study of the heat flux distribution inside the steam receiver is used to spatially refine the modelDYNAMIC SIMULATION OF MONO-TUBE CAVITY RECEIVERS FOR DIRECT STEAM GENERATION José Zapata 1 , John dish has been in operation since 2010 with a mono-tube steam cavity receiver, the SG4 system

466

Decentralized Control to Augment LVRT Capability of Wind Generators with STATCOM/ESS  

E-Print Network (OSTI)

are still in operation. Also, during large disturbances, doubly-fed induction generators (DFIG) behave

Pota, Himanshu Roy

467

Higher Fourier Harmonics of the Directional Distribution of an Equilibrium Wave Field under Steady Wind Forcing  

Science Conference Proceedings (OSTI)

Recently, directional wave spectra have been obtained by applying the two-dimensional fast Fourier transform (2D FFT) to the three-dimensional spatial topography of ocean surface waves collected by an airborne scanning laser ranging system during ...

David W. Wang; Paul A. Hwang

2003-01-01T23:59:59.000Z

468

Doubly Fed Induction Generator in an Offshore Wind Power Plant Operated at Rated V/Hz: Preprint  

DOE Green Energy (OSTI)

This paper introduces the concept of constant Volt/Hz operation of offshore wind power plants. The deployment of offshore WPPs requires power transmission from the plant to the load center inland. Since this power transmission requires submarine cables, there is a need to use High-Voltage Direct Current transmission, which is economical for transmission distances longer than 50 kilometers. In the concept presented here, the onshore substation is operated at 60 Hz synced with the grid, and the offshore substation is operated at variable frequency and voltage, thus allowing the WPP to be operated at constant Volt/Hz.

Muljadi, E.; Singh, M.; Gevorgian, V.

2012-06-01T23:59:59.000Z

469

Jilin Tongli Wind Power Co Ltd | Open Energy Information  

Open Energy Info (EERE)

Jilin Province, China Sector Wind energy Product Jilin-based company focused on wind power generation and development of wind projects. References Jilin Tongli Wind Power Co...

470

The Economics of Wind Energy | Open Energy Information  

Open Energy Info (EERE)

Economics of Wind Energy Economics of Wind Energy Jump to: navigation, search Tool Summary LAUNCH TOOL Name: The Economics of Wind Energy Agency/Company /Organization: European Wind Energy Association Sector: Energy Focus Area: Renewable Energy, Wind Topics: Market analysis Resource Type: Publications Website: www.ewea.org/fileadmin/ewea_documents/documents/publications/reports/E The Economics of Wind Energy Screenshot References: The Economics of Wind Energy [1] Overview "This report provides a systematic framework for the economic dimension of wind energy and of the energy policy debate when comparing different power generation technologies. A second contribution is to put fuel price risk directly into the analysis of the optimal choice of energy sources for power generation."

471

Wind Energy & Manufacturing | Open Energy Information  

Open Energy Info (EERE)

Wind Energy & Manufacturing Wind Energy & Manufacturing Jump to: navigation, search Blades manufactured at Gamesa's factory in Ebensburg, Pennsylvania, await delivery for development of wind farms across the country in the United States. Photo from Gamesa, NREL 16001 Wind power creates new high-paying jobs in a wide variety of industries. This includes direct jobs installing, operating, and maintaining wind turbines, as well as jobs at manufacturing facilities that produce wind turbines, blades, electronic components, gearboxes, generators, towers, and other equipment. Indirect jobs in the industries that support these activities are also created.[1] In 2012, 72% of the wind turbine equipment (including towers, blades, and gears) installed in the United States during the year was made in

472

Session: What can we learn from developed wind resource areas  

DOE Green Energy (OSTI)

This session at the Wind Energy and Birds/Bats workshop was composed of two parts intended to examine what existing science tells us about wind turbine impacts at existing wind project sites. Part one dealt with the Altamont Wind Resource area, one of the older wind projects in the US, with a paper presented by Carl Thelander titled ''Bird Fatalities in the Altamont Pass Wind Resource Area: A Case Study, Part 1''. Questions addressed by the presenter included: how is avian habitat affected at Altamont and do birds avoid turbine sites; are birds being attracted to turbine strings; what factors contribute to direct impacts on birds by wind turbines at Altamont; how do use, behavior, avoidance and other factors affect risk to avian species, and particularly impacts those species listed as threatened, endangered, or of conservation concern, and other state listed species. The second part dealt with direct impacts to birds at new generation wind plants outside of California, examining such is sues as mortality, avoidance, direct habitat impacts from terrestrial wind projects, species and numbers killed per turbine rates/MW generated, impacts to listed threatened and endangered species, to USFWS Birds of Conservation Concern, and to state listed species. This session focused on newer wind project sites with a paper titled ''Bird Fatality and Risk at New Generation Wind Projects'' by Wally Erickson. Each paper was followed by a discussion/question and answer period.

Thelander, Carl; Erickson, Wally

2004-09-01T23:59:59.000Z

473

Review of Wind Energy Forecasting Methods for Modeling Ramping Events  

DOE Green Energy (OSTI)

Tall onshore wind turbines, with hub heights between 80 m and 100 m, can extract large amounts of energy from the atmosphere since they generally encounter higher wind speeds, but they face challenges given the complexity of boundary layer flows. This complexity of the lowest layers of the atmosphere, where wind turbines reside, has made conventional modeling efforts less than ideal. To meet the nation's goal of increasing wind power into the U.S. electrical grid, the accuracy of wind power forecasts must be improved. In this report, the Lawrence Livermore National Laboratory, in collaboration with the University of Colorado at Boulder, University of California at Berkeley, and Colorado School of Mines, evaluates innovative approaches to forecasting sudden changes in wind speed or 'ramping events' at an onshore, multimegawatt wind farm. The forecast simulations are compared to observations of wind speed and direction from tall meteorological towers and a remote-sensing Sound Detection and Ranging (SODAR) instrument. Ramping events, i.e., sudden increases or decreases in wind speed and hence, power generated by a turbine, are especially problematic for wind farm operators. Sudden changes in wind speed or direction can lead to large power generation differences across a wind farm and are very difficult to predict with current forecasting tools. Here, we quantify the ability of three models, mesoscale WRF, WRF-LES, and PF.WRF, which vary in sophistication and required user expertise, to predict three ramping events at a North American wind farm.

Wharton, S; Lundquist, J K; Marjanovic, N; Williams, J L; Rhodes, M; Chow, T K; Maxwell, R

2011-03-28T23:59:59.000Z

474

Doubly Fed Induction Generator in an Offshore Wind Power Plant Operated at Rated V/Hz: Preprint  

NLE Websites -- All DOE Office Websites (Extended Search)

Doubly Fed Induction Generator Doubly Fed Induction Generator in an Offshore Wind Power Plant Operated at Rated V/Hz Preprint Eduard Muljadi, Mohit Singh, and Vahan Gevorgian To be presented at the IEEE Energy Conversion Congress and Exhibition Raleigh, North Carolina September 15-20, 2012 Conference Paper NREL/CP-5500-55573 June 2012 NOTICE The submitted manuscript has been offered by an employee of the Alliance for Sustainable Energy, LLC (Alliance), a contractor of the US Government under Contract No. DE-AC36-08GO28308. Accordingly, the US Government and Alliance retain a nonexclusive royalty-free license to publish or reproduce the published form of this contribution, or allow others to do so, for US Government purposes. This report was prepared as an account of work sponsored by an agency of the United States government.

475

Wind Turbine Bearing Failure Detection Using Generator Stator Current Homopolar Component  

E-Print Network (OSTI)

systems (WECS) are the fastest growing sources of new electric generation in the world and it is expected generation systems, which are facing to constantly changing operating parameters, such as fuel cost, multiple, leading to a best electricity generating opportunities. However, the offshore or onshore environments

Paris-Sud XI, Université de

476

UMASS MINI-CODES FOR WIND ENERGY ENGINEERING APPLICATIONS J. F. Manwell, A. L. Rogers, J. G. McGowan, U. Abdulwaid  

E-Print Network (OSTI)

.4 Voltage unbalance Single wind turbines or smaller groups of wind turbines have been connected to existing to the wind turbines with power converters, the phase currents in the directly connected induction generators to a single wind turbine. Especially the fast fluctuations which cause flicker emission will be reduced. 3

Massachusetts at Amherst, University of

477

Conceptual Design of a Lead-Bismuth Cooled Fast Reactor with In-Vessel Direct-Contact Steam Generation  

E-Print Network (OSTI)

The feasibility of a lead-bismuth (Pb-Bi) cooled fast reactor that eliminates the need for steam generators and coolant pumps was explored. The working steam is generated by direct contact vaporization of water and liquid ...

Buongiorno, J.

478

Conceptual design of a lead-bismuth cooled fast reactor with in-vessel direct-contact steam generation  

E-Print Network (OSTI)

The feasibility of a lead-bismuth (Pb-Bi) cooled fast reactor that eliminates the need for steam generators and coolant pumps was explored. The working steam is generated by direct contact vaporization of water and liquid ...

Buongiorno, Jacopo, 1971-

2001-01-01T23:59:59.000Z

479

MHK Projects/OSU Direct Drive Power Generation Buoys | Open Energy  

Open Energy Info (EERE)

OSU Direct Drive Power Generation Buoys OSU Direct Drive Power Generation Buoys < MHK Projects Jump to: navigation, search << Return to the MHK database homepage Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":5,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"500px","height":"350px","centre":false,"title":"","label":"","icon":"File:Aquamarine-marker.png","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":44.6472,"lon":-124.127,"alt":0,"address":"","icon":"http:\/\/prod-http-80-800498448.us-east-1.elb.amazonaws.com\/w\/images\/7\/74\/Aquamarine-marker.png","group":"","inlineLabel":"","visitedicon":""}]}

480

Wind Speed Forecasting for Power System Operation  

E-Print Network (OSTI)

In order to support large-scale integration of wind power into current electric energy system, accurate wind speed forecasting is essential, because the high variation and limited predictability of wind pose profound challenges to the power system operation in terms of the efficiency of the system. The goal of this dissertation is to develop advanced statistical wind speed predictive models to reduce the uncertainties in wind, especially the short-term future wind speed. Moreover, a criterion is proposed to evaluate the performance of models. Cost reduction in power system operation, as proposed, is more realistic than prevalent criteria, such as, root mean square error (RMSE) and absolute mean error (MAE). Two advanced space-time statistical models are introduced for short-term wind speed forecasting. One is a modified regime-switching, space-time wind speed fore- casting model, which allows the forecast regimes to vary according to the dominant wind direction and seasons. Thus, it avoids a subjective choice of regimes. The other one is a novel model that incorporates a new variable, geostrophic wind, which has strong influence on the surface wind, into one of the advanced space-time statistical forecasting models. This model is motivated by the lack of improvement in forecast accuracy when using air pressure and temperature directly. Using geostrophic wind in the model is not only critical, it also has a meaningful geophysical interpretation. The importance of model evaluation is emphasized in the dissertation as well. Rather than using RMSE or MAE, the performance of both wind forecasting models mentioned above are assessed by economic benefits with real wind farm data from Pacific Northwest of the U.S and West Texas. Wind forecasts are incorporated into power system economic dispatch models, and the power system operation cost is used as a loss measure for the performance of the forecasting models. From another perspective, the new criterion leads to cost-effective scheduling of system-wide wind generation with potential economic benefits arising from the system-wide generation of cost savings and ancillary services cost savings. As an illustration, the integrated forecasts and economic dispatch framework are applied to the Electric Reliability Council of Texas (ERCOT) equivalent 24- bus system. Compared with persistence and autoregressive models, the first model suggests that cost savings from integration of wind power could be on the scale of tens of millions of dollars. For the second model, numerical simulations suggest that the overall generation cost can be reduced by up to 6.6% using look-ahead dispatch coupled with spatio-temporal wind forecast as compared with dispatch with persistent wind forecast model.

Zhu, Xinxin

2013-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "direct wind generator" from the National Library of EnergyBeta (NLEBeta).
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to obtain the most current and comprehensive results.


481

Generation Interconnection Policies and Wind Power: A Discussion of Issues, Problems, and Potential Solutions  

DOE Green Energy (OSTI)

This report describes the adoption and implementation of FERC Order 2003 and the reasons for the sharp rise in generation interconnection filings in recent years.

Porter, K.; Fink, S.; Mudd, C.; DeCesaro, J.

2009-01-01T23:59:59.000Z

482

Design of a Ferrite Permanent Magnet Rotor for a Wind Power Generator.  

E-Print Network (OSTI)

?? Due to the insecurity of the supply of raw materials needed for neodymium-iron-boron magnets, typically used in permanent magnet generators, the use of ferrite (more)

Eklund, Petter

2013-01-01T23:59:59.000Z

483

Power System Modeling of 20percent Wind-Generated Electricity by 2030  

E-Print Network (OSTI)

AEO 2007 high fuel price forecast Coal prices follow AEOcoal- and natural gas-based electricity generation analyzed here include decreased natural gas prices,

Hand, Maureen

2008-01-01T23:59:59.000Z

484

Wind Power  

NLE Websites -- All DOE Office Websites (Extended Search)

Power As the accompanying map of New Mexico shows, the best wind power generation potential near WIPP is along the Delaware Mountain ridge line of the southern Guadalupe Mountains,...

485

Wind Derivatives: Modeling and Pricing  

Science Conference Proceedings (OSTI)

Wind is considered to be a free, renewable and environmentally friendly source of energy. However, wind farms are exposed to excessive weather risk since the power production depends on the wind speed, the wind direction and the wind duration. This risk ... Keywords: Forecasting, Pricing, Wavelet networks, Weather derivatives, Wind derivatives

A. Alexandridis; A. Zapranis

2013-03-01T23:59:59.000Z

486

Feasibility Study of Economics and Performance of Wind Turbine...  

NLE Websites -- All DOE Office Websites (Extended Search)

Wind Turbine Generators at the Newport Indiana Chemical Depot Site Joseph Owen Roberts and Gail Mosey Produced under direction of U.S. Environmental Protection Agency (EPA) by the...

487

Method and apparatus for wind turbine air gap control - Energy ...  

Methods and apparatus for assembling a wind turbine generator are provided. The wind turbine generator includes a core and a plurality of stator windings ...

488

Generating Economic Development from a Wind Power Plant in Spanish Fork Canyon, Utah: A Case Study and Analysis of State-Level Economic Impacts  

Wind Powering America (EERE)

Generating Economic Development from a Wind Power Generating Economic Development from a Wind Power Project in Spanish Fork Canyon, Utah: A Case Study and Analysis of State-Level Economic Impacts Sandra Reategui Edwin R. Stafford, Ph.D. Cathy L. Hartman, Ph.D. Center for the Market Diffusion of Renewable Energy and Clean Technology Jon M. Huntsman School of Business Utah State University 3560 Old Main Hill Logan, Utah 84322-3560 January 2009 DOE/GO-102009-2760 Acknowledgements ....................................................................................................................... 1 Introduction ................................................................................................................................... 2 Report Overview ......................................................................................................................... 2

489

Stakeholder Engagement and Outreach: Learn About Wind  

Wind Powering America (EERE)

About Wind Power Locating Wind Power Getting Wind Power Installed Wind Capacity Wind for Schools Project Collegiate Wind Competition School Project Locations Education & Training Programs Curricula & Teaching Materials Resources Learn About Wind Learn about how wind energy generates power; where the best wind resources are; how you can own, host, partner with, and support wind power; and how and where wind energy has increased over the past decade. What Is Wind Power? Learn about how wind energy generates power, about wind turbine sizes and how wind turbines work, and how wind energy can be used. Also read examples of financial and business decisions. Where Is Wind Power? Go to maps to see the wind resource for utility-, community-, and residential-scale wind development. Or, see how much energy wind projects

490

Power System Modeling of 20percent Wind-Generated Electricity by 2030  

E-Print Network (OSTI)

pulverized coal plants, combined cycle natural gas plants,natural gas plants, and combined cycle natural gas plants.generated largely from combined-cycle Capacity (GW) yd r as

Hand, Maureen

2008-01-01T23:59:59.000Z

491

Operational Forecasting of Wind-Generated Waves by Hurricane Isabel at NCEP  

Science Conference Proceedings (OSTI)

The accuracy of the operational wave models at the National Centers for Environmental Prediction (NCEP) for sea states generated by Hurricane Isabel is assessed. The western North Atlantic (WNA) and the North Atlantic hurricane (NAH) wave models ...

Hendrik L. Tolman; Jose-Henrique G. M. Alves; Yung Y. Chao

2005-08-01T23:59:59.000Z

492

The Operational Generation of Continuous Winds in the Australian Region and Their Assimilation with 4DVAR  

Science Conference Proceedings (OSTI)

Atmospheric motion vectors (AMVs) have been generated continuously from Multifunctional Transport Satellite 1 Replacement (MTSAT-1R) radiance data (imagery) since 2005, and more recently from MTSAT-2, which are operated by the Japan Meteorological ...

John Le Marshall; Rolf Seecamp; Yi Xiao; Paul Gregory; Jim Jung; Peter Stienle; Terry Skinner; Chris Tingwell; Tan Le

2013-04-01T23:59:59.000Z

493

Effects of Numerics on the Physics in a Third-Generation Wind-Wave Model  

Science Conference Proceedings (OSTI)

Numerical errors in third-generation ocean wave models can result in a misinterpretation of the physics in the model. Using idealized situations, it is shown that numerical errors significantly influence the initial growth, the response of wave ...

Hendrik L. Tolman

1992-10-01T23:59:59.000Z

494

Direct optoelectronic generation and detection of sub-ps-electrical pulses on sub-mm-coaxial transmission lines  

E-Print Network (OSTI)

-mm-coaxial transmission lines Tae-In Jeona) and D. Grischkowskyb) School of Electrical and Computer Engineering, OklahomaDirect optoelectronic generation and detection of sub-ps-electrical pulses on sub efficient direct optoelectronic generation of sub-ps-THz pulses on 50 coaxial transmission lines with a 330

Oklahoma State University

495

Physical Modeling of Suction Caissons Loaded in Two Orthogonal Directions for Efficient Mooring of Offshore Wind Platforms.  

E-Print Network (OSTI)

??Over the past decade a number of Federal and State policies and programs have promoted the development of the wind energy industry, including the establishment (more)

Chung, Jade

2012-01-01T23:59:59.000Z

496

Plan for the Wind Power Device to Make the Best of Earth Wind Energy  

Science Conference Proceedings (OSTI)

To make the best of wind energy resources on the earth surface, the plan for a new type of wind power device, named Multiple wind wheel Wind power Device, MWD in short, was put forward. MWD composes steel tower, trusses, generator, long axis, wind turbines ... Keywords: clean renewable sources, wind energy, wind power, wind turbine

Bingwen Zhang; Yingjin Zhang

2010-06-01T23:59:59.000Z