Sample records for grid-connected distributed pv

  1. Performance Parameters for Grid-Connected PV Systems

    SciTech Connect (OSTI)

    Marion, B.; Adelstein, J.; Boyle, K.; Hayden, H.; Hammond, B.; Fletcher, T.; Canada, B.; Narang, D.; Shugar, D.; Wenger, H.; Kimber, A.; Mitchell, L.; Rich, G.; Townsend, T.

    2005-02-01T23:59:59.000Z

    The use of appropriate performance parameters facilitates the comparison of grid-connected photovoltaic (PV) systems that may differ with respect to design, technology, or geographic location. Four performance parameters that define the overall system performance with respect to the energy production, solar resource, and overall effect of system losses are the following: final PV system yield, reference yield, performance ratio, and PVUSA rating. These performance parameters are discussed for their suitability in providing desired information for PV system design and performance evaluation and are demonstrated for a variety of technologies, designs, and geographic locations. Also discussed are methodologies for determining system a.c. power ratings in the design phase using multipliers developed from measured performance parameters.The use of appropriate performance parameters facilitates the comparison of grid-connected photovoltaic (PV) systems that may differ with respect to design, technology, or geographic location. Four performance parameters that define the overall system performance with respect to the energy production, solar resource, and overall effect of system losses are the following: final PV system yield, reference yield, performance ratio, and PVUSA rating. These performance parameters are discussed for their suitability in providing desired information for PV system design and performance evaluation and are demonstrated for a variety of technologies, designs, and geographic locations. Also discussed are methodologies for determining system a.c. power ratings in the design phase using multipliers developed from measured performance parameters.

  2. Battery Management for Grid-Connected PV Systems with a Battery

    E-Print Network [OSTI]

    Pedram, Massoud

    components such as the PV array and PV inverters. The mainstream research is related to maxi- mum power pointBattery Management for Grid-Connected PV Systems with a Battery Sangyoung Park1, Yanzhi Wang2}@usc.edu ABSTRACT Photovoltaic (PV) power generation systems are one of the most promising renewable power sources

  3. Environmental impacts of large-scale grid-connected ground-mounted PV installations

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Environmental impacts of large-scale grid-connected ground-mounted PV installations Antoine Beylota-scale ground-mounted PV installations by considering a life-cycle approach. The methodology is based. Mobile PV installations with dual-axis trackers show the largest impact potential on ecosystem quality

  4. QUALIFIED FORECAST OF ENSEMBLE POWER PRODUCTION BY SPATIALLY DISPERSED GRID-CONNECTED PV SYSTEMS

    E-Print Network [OSTI]

    Heinemann, Detlev

    QUALIFIED FORECAST OF ENSEMBLE POWER PRODUCTION BY SPATIALLY DISPERSED GRID- CONNECTED PV SYSTEMS: The contribution of power production by Photovoltaic (PV) systems to the electricity supply is constantly of the electricity grids and for energy trading. This paper presents an approach to predict regional PV power output

  5. OFF-SHORE WIND AND GRID-CONNECTED PV: HIGH PENETRATION PEAK SHAVING FOR NEW YORK CITY

    E-Print Network [OSTI]

    Perez, Richard R.

    OFF-SHORE WIND AND GRID-CONNECTED PV: HIGH PENETRATION PEAK SHAVING FOR NEW YORK CITY Richard Perez-shore wind and PV generation using the city of New York as a test case. While wind generation is not known one year's worth of hourly site & time-specific data including electrical demand PV and off-shore wind

  6. FORECAST OF ENSEMBLE POWER PRODUCTION BY GRID-CONNECTED PV SYSTEMS Elke Lorenz*, Detlev Heinemann*, Hashini Wickramarathne*, Hans Georg Beyer +

    E-Print Network [OSTI]

    Heinemann, Detlev

    FORECAST OF ENSEMBLE POWER PRODUCTION BY GRID-CONNECTED PV SYSTEMS Elke Lorenz*, Detlev HeinemannH, Spicherer Straße 48, D-86157 Augsburg, Germany ABSTRACT: The contribution of power production by PV systems and evaluate an approach to forecast regional PV power production. The forecast quality was investigated

  7. The inverter is a major component of photovoltaic (PV) systems either autonomous or grid connected. It affects the

    E-Print Network [OSTI]

    Oregon, University of

    ABSTRACT The inverter is a major component of photovoltaic (PV) systems either autonomous or grid connected. It affects the overall performance of the PV system. Any problems or issues with an inverter. INTRODUCTION For any grid tied photovoltaic (PV) system, the inverter is the essential piece of equipment

  8. Direct power control of grid connected PV systems with three level NPC inverter

    SciTech Connect (OSTI)

    Alonso-Martinez, Jaime; Eloy-Garcia, Joaquin; Arnaltes, Santiago [Dept. of Electrical Engineering, University Carlos III of Madrid, Avda. Universidad 30, 28911 Leganes, Madrid (Spain)

    2010-07-15T23:59:59.000Z

    This paper presents the control of a three-level Neutral Point Clamped (NPC) voltage source inverter for grid connected photovoltaic (PV) systems. The control method used is the Extended Direct Power Control (EDPC), which is a generic approach for Direct Power Control (DPC) of multilevel inverters based on geometrical considerations. Maximum Power Point Tracking (MPPT) algorithms, that allow maximal power conversion into the grid, have been included. These methods are capable of extracting maximum power from each of the independent PV arrays connected to each DC link voltage level. The first one is a conventional MPPT which outputs DC link voltage references to EDPC. The second one is based on DPC concept. This new MPPT outputs power increment references to EDPC, thus avoiding the use of a DC link voltage regulator. The whole control system has been tested on a three-level NPC voltage source inverter connected to the grid and results confirm the validity of the method. (author)

  9. Electricity storage for grid-connected household dwellings with PV panels

    SciTech Connect (OSTI)

    Mulder, Grietus; Six, Daan [Vlaamse Instelling voor Technologisch Onderzoek, Unit Energy Technology, Mol (Belgium); Ridder, Fjo De [Vrije Universiteit Brussel (Belgium)

    2010-07-15T23:59:59.000Z

    Classically electricity storage for PV panels is mostly designed for stand-alone applications. In contrast, we focus in this article on houses connected to the grid with a small-scale storage to store a part of the solar power for postponed consumption within the day or the next days. In this way the house owner becomes less dependent on the grid and does only pay for the net shortage of his energy production. Local storage solutions pave the way for many new applications like omitting over-voltage of the line and bridging periods of power-line black-out. Since 2009 using self-consumption of PV energy is publicly encouraged in Germany, which can be realised by electric storage. This paper develops methods to determine the optimal storage size for grid-connected dwellings with PV panels. From measurements in houses we were able to establish calculation rules for sizing the storage. Two situations for electricity storage are covered: - the storage system is an optimum to cover most of the electricity needs; - it is an optimum for covering the peak power need of a dwelling. After these calculation rules a second step is needed to determine the size of the real battery. The article treats the aspects that should be taken into consideration before buying a specific battery like lead-acid and lithium-ion batteries. (author)

  10. PVGIS approach for assessing the performances of the first PV grid-connected power plant in Morocco

    E-Print Network [OSTI]

    Barhdadi, Abdelfettah

    2012-01-01T23:59:59.000Z

    In this paper, we apply the PVGIS method for estimating the performance of the first grid-connected PV micro-power plant in Morocco. PVGIS approach provides analysis and assessment of in-site solar energy resources and predicts with good accuracy the potential of PV systems in term of electricity production. We find that annual total power generation of the micro-power is slightly higher than that initially expected at the installation stage and actually measured. The yearly predicted and measured power production values agree to about 2 %. However, individual monthly production can have larger discrepancy.

  11. Utility Grid-Connected Distributed Power Systems National Solar Energy Conference

    E-Print Network [OSTI]

    Utility Grid-Connected Distributed Power Systems National Solar Energy Conference ASES Solar 96 at least half of its energy obtained from energy efficiency and renewable resources by the year 2000. Solar energy, distributed generation resource. Investments made in solar power today are expected to provide

  12. High-efficiency grid-connected photovoltaic module integrated converter system with high-speed communication interfaces for small-scale distribution power generation

    SciTech Connect (OSTI)

    Choi, Woo-Young; Lai, Jih-Sheng (Jason) [Future Energy Electronics Center, Department of Electrical and Computer Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA (United States)

    2010-04-15T23:59:59.000Z

    This paper presents a high-efficiency grid-connected photovoltaic (PV) module integrated converter (MIC) system with reduced PV current variation. The proposed PV MIC system consists of a high-efficiency step-up DC-DC converter and a single-phase full-bridge DC-AC inverter. An active-clamping flyback converter with a voltage-doubler rectifier is proposed for the step-up DC-DC converter. The proposed step-up DC-DC converter reduces the switching losses by eliminating the reverse-recovery current of the output rectifying diodes. To reduce the PV current variation introduced by the grid-connected inverter, a PV current variation reduction method is also suggested. The suggested PV current variation reduction method reduces the PV current variation without any additional components. Moreover, for centralized power control of distributed PV MIC systems, a PV power control scheme with both a central control level and a local control level is presented. The central PV power control level controls the whole power production by sending out reference power signals to each individual PV MIC system. The proposed step-up DC-DC converter achieves a high-efficiency of 97.5% at 260 W output power to generate the DC-link voltage of 350 V from the PV voltage of 36.1 V. The PV MIC system including the DC-DC converter and the DC-AC inverter achieves a high-efficiency of 95% with the PV current ripple less than 3% variation of the rated PV current. (author)

  13. Hourly Simulation of Grid-Connected PV Systems Using Realistic Building Loads (Preprint)

    SciTech Connect (OSTI)

    Balcomb, J.D.; Hayter, S.J. (National Renewable Energy Laboratory); Weaver, N.L. (InterWeaver Consulting)

    2001-02-27T23:59:59.000Z

    This is one of two companion papers that describe the ENERGY-10 PV design tool computer simulation program. The other paper is titled ''ENERGY-10 Photovoltaics: A New Capability.'' Whereas this paper focuses on the PV aspects of the program, the companion paper focuses on the implementation method. The case study in this paper is a commercial building application, whereas the case study in the companion paper is a residential application with an entirely different building load characteristic. Together they provide a balanced view.

  14. FAILURE DETECTION ROUTINE FOR GRID CONNECTED PV SYSTEMS AS PART OF THE PVSAT-2 PROJECT

    E-Print Network [OSTI]

    Heinemann, Detlev

    Dept. Of Electrical Engineering, University of Applied Science (FH) Magdeburg-Stendal. D-39114 failures, e.g. shading, string or module failure, part time outages, snow cover, soiling and wrong inverter, the maintenance effort of PV systems is reduced und system outage time is minimised. The Failure Detection Routine

  15. A Wavelet-Based Variability Model (WVM) for Solar PV Power Plants

    E-Print Network [OSTI]

    Lave, Matthew; Kleissl, Jan; Stein, Joshua S

    2013-01-01T23:59:59.000Z

    Power characteristics of PV ensembles: experiences from theproduction of 100 grid connected PV systems distributed overHoff and R. Perez, "Modeling PV Fleet Output Variability,"

  16. High Penetration, Grid Connected Photovoltaic Technology Codes and Standards: Preprint

    SciTech Connect (OSTI)

    Basso, T. S.

    2008-05-01T23:59:59.000Z

    This paper reports the interim status in identifying and reviewing photovoltaic (PV) codes and standards (C&S) and related electrical activities for grid-connected, high-penetration PV systems with a focus on U.S. electric utility distribution grid interconnection.

  17. Monitoring and analysis of two grid connected PV systems Michael BRESSAN* Valrie DUPE**, Bruno JAMMES**, Thierry TALBERT*, Corinne ALONSO**

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    . Adapted to all kinds of equipment, it can be installed on any inverter or PV array. This monitoring system l building ha u" (1 inverte mum power ur rideau" a monitoring (latitude 43 V technolog PV array. A microco meter can m PV inverte re 1: Monitor grid con el systems study PV s a non linear everal pape

  18. Grid integrated distributed PV (GridPV).

    SciTech Connect (OSTI)

    Reno, Matthew J.; Coogan, Kyle [Georgia Institute of Technology, Atlanta, GA

    2013-08-01T23:59:59.000Z

    This manual provides the documentation of the MATLAB toolbox of functions for using OpenDSS to simulate the impact of solar energy on the distribution system. The majority of the functions are useful for interfacing OpenDSS and MATLAB, and they are of generic use for commanding OpenDSS from MATLAB and retrieving information from simulations. A set of functions is also included for modeling PV plant output and setting up the PV plant in the OpenDSS simulation. The toolbox contains functions for modeling the OpenDSS distribution feeder on satellite images with GPS coordinates. Finally, example simulations functions are included to show potential uses of the toolbox functions. Each function in the toolbox is documented with the function use syntax, full description, function input list, function output list, example use, and example output.

  19. Optimal Design of Grid-Connected PEV Charging Systems With Integrated Distributed Resources

    E-Print Network [OSTI]

    Perreault, David J.

    The penetration of plug-in electric vehicles and renewable distributed generation is expected to increase over the next few decades. Large scale unregulated deployment of either technology can have a detrimental impact on ...

  20. Abstract--This paper deals with the design of a nonlinear con-troller for single-phase grid-connected photovoltaic (PV) systems

    E-Print Network [OSTI]

    Pota, Himanshu Roy

    of solar irradiations and interfacing of inverters with the grid. The intermittent PV generation varies-connected photovoltaic (PV) systems to maintain the current injected into the grid in phase with grid voltage. This paper also deals with the stability of internal dynamics of PV systems which is a basic requirement

  1. Selective compensation of voltage harmonics in grid-connected microgrids

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

    1 Selective compensation of voltage harmonics in grid-connected microgrids Mehdi Savaghebia , Juan is proposed for selective compensation of main voltage harmonics in a grid- connected microgrid. The aim level. Keywords Distributed Generator (DG); microgrid; grid-connected; voltage harmonics compensation. 1

  2. A 24-h forecast of solar irradiance using artificial neural network: Application for performance prediction of a grid-connected PV plant at Trieste, Italy

    SciTech Connect (OSTI)

    Mellit, Adel [Department of Electronics, Faculty of Sciences and Technology, LAMEL, Jijel University, Ouled-aissa, P.O. Box 98, Jijel 18000 (Algeria); Pavan, Alessandro Massi [Department of Materials and Natural Resources, University of Trieste Via A. Valerio, 2 - 34127 Trieste (Italy)

    2010-05-15T23:59:59.000Z

    Forecasting of solar irradiance is in general significant for planning the operations of power plants which convert renewable energies into electricity. In particular, the possibility to predict the solar irradiance (up to 24 h or even more) can became - with reference to the Grid Connected Photovoltaic Plants (GCPV) - fundamental in making power dispatching plans and - with reference to stand alone and hybrid systems - also a useful reference for improving the control algorithms of charge controllers. In this paper, a practical method for solar irradiance forecast using artificial neural network (ANN) is presented. The proposed Multilayer Perceptron MLP-model makes it possible to forecast the solar irradiance on a base of 24 h using the present values of the mean daily solar irradiance and air temperature. An experimental database of solar irradiance and air temperature data (from July 1st 2008 to May 23rd 2009 and from November 23rd 2009 to January 24th 2010) has been used. The database has been collected in Trieste (latitude 45 40'N, longitude 13 46'E), Italy. In order to check the generalization capability of the MLP-forecaster, a K-fold cross-validation was carried out. The results indicate that the proposed model performs well, while the correlation coefficient is in the range 98-99% for sunny days and 94-96% for cloudy days. As an application, the comparison between the forecasted one and the energy produced by the GCPV plant installed on the rooftop of the municipality of Trieste shows the goodness of the proposed model. (author)

  3. GROWDERS Demonstration of Grid Connected Electricity Systems...

    Open Energy Info (EERE)

    GROWDERS Demonstration of Grid Connected Electricity Systems (Smart Grid Project) (Spain) Jump to: navigation, search Project Name GROWDERS Demonstration of Grid Connected...

  4. Blanc, I., Beloin-Saint-Pierre, D., Payet, J., Jacquin, P., Adra, N., Mayer, D., Espace-PV: key sensitive parameters for environmental impacts of grid-connected PV systems with LCA , In Proceedings of the 23rd

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    global warming (g. of CO2 eq./kWh) and non- renewable energy (MJ/kWh) indicators as key LCA outputs AND HYPOTHESIS 2.1 Scope of Espace-PV study The LCA is done for the production of electricity with an integrated electricity with more than a 100% of the impact of a southern system. Other important factors are the lifetime

  5. Grid Integrated Distributed PV (GridPV) Version 2.

    SciTech Connect (OSTI)

    Reno, Matthew J.; Coogan, Kyle

    2014-12-01T23:59:59.000Z

    This manual provides the documentation of the MATLAB toolbox of functions for using OpenDSS to simulate the impact of solar energy on the distribution system. The majority of the functio ns are useful for interfacing OpenDSS and MATLAB, and they are of generic use for commanding OpenDSS from MATLAB and retrieving information from simulations. A set of functions is also included for modeling PV plant output and setting up the PV plant in th e OpenDSS simulation. The toolbox contains functions for modeling the OpenDSS distribution feeder on satellite images with GPS coordinates. Finally, example simulations functions are included to show potential uses of the toolbox functions. Each function i n the toolbox is documented with the function use syntax, full description, function input list, function output list, example use, and example output.

  6. Novel MIMO Linear Zero Dynamic Controller for the Grid-connected Photovoltaic System with

    E-Print Network [OSTI]

    Pota, Himanshu Roy

    connected PV system also has its own draw- backs, the conversion efficiency of the inverter is low under low (PV) system. The relative degree is investigated through the concept of Lie derivative to execute the LZDC for three phase grid connected PV system. To implement the control theory, system stability

  7. Distributed PV Permitting and Inspection Processes

    Broader source: Energy.gov [DOE]

    This presentation summarizes case studies of the time and cost involved in the distributed PV permitting and inspection process in three Solar America Cities, Austin, Portland, and Salt Lake City.

  8. Ota City : characterizing output variability from 553 homes with residential PV systems on a distribution feeder.

    SciTech Connect (OSTI)

    Stein, Joshua S.; Miyamoto, Yusuke (Kandenko, Ibaraki, Japan); Nakashima, Eichi (Kandenko, Ibaraki, Japan); Lave, Matthew

    2011-11-01T23:59:59.000Z

    This report describes in-depth analysis of photovoltaic (PV) output variability in a high-penetration residential PV installation in the Pal Town neighborhood of Ota City, Japan. Pal Town is a unique test bed of high-penetration PV deployment. A total of 553 homes (approximately 80% of the neighborhood) have grid-connected PV totaling over 2 MW, and all are on a common distribution line. Power output at each house and irradiance at several locations were measured once per second in 2006 and 2007. Analysis of the Ota City data allowed for detailed characterization of distributed PV output variability and a better understanding of how variability scales spatially and temporally. For a highly variable test day, extreme power ramp rates (defined as the 99th percentile) were found to initially decrease with an increase in the number of houses at all timescales, but the reduction became negligible after a certain number of houses. Wavelet analysis resolved the variability reduction due to geographic diversity at various timescales, and the effect of geographic smoothing was found to be much more significant at shorter timescales.

  9. PV Incentive Program

    Broader source: Energy.gov [DOE]

    The New York State Energy Research and Development Authority (NYSERDA) provides an incentive eligible installers for the installation of approved, grid-connected photovoltaic (PV) systems. The base...

  10. Grid Connectivity Research, Development & Demonstration Projects...

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

    Connectivity Research, Development & Demonstration Projects Grid Connectivity Research, Development & Demonstration Projects 2013 DOE Hydrogen and Fuel Cells Program and Vehicle...

  11. 564 IEEE JOURNAL OF PHOTOVOLTAICS, VOL. 2, NO. 4, OCTOBER 2012 Dynamic Stability of Three-Phase Grid-Connected

    E-Print Network [OSTI]

    Pota, Himanshu Roy

    564 IEEE JOURNAL OF PHOTOVOLTAICS, VOL. 2, NO. 4, OCTOBER 2012 Dynamic Stability of Three-Phase Grid-Connected Photovoltaic System Using Zero Dynamic Design Approach M. A. Mahmud, Student Member of the dynamic response of a three-phase grid-connected photovoltaic (PV) system. To control the grid cur- rent

  12. Physical Effects of Distributed PV Generation on California's Distribution System

    E-Print Network [OSTI]

    Cohen, Michael A

    2015-01-01T23:59:59.000Z

    Deployment of high-penetration photovoltaic (PV) power is expected to have a range of effects -- both positive and negative -- on the distribution grid. The magnitude of these effects may vary greatly depending upon feeder topology, climate, PV penetration level, and other factors. In this paper we present a simulation study of eight representative distribution feeders in three California climates at PV penetration levels up to 100\\%, supported by a unique database of distributed PV generation data that enables us to capture the impact of PV variability on feeder voltage and voltage regulating equipment. When comparing the influence of feeder location (i.e. climate) versus feeder type on outcomes, we find that location more strongly influences the incidence of reverse power flow, reductions in peak loading and the presence of voltage excursions. On the other hand, we find that feeder characteristics more strongly influence the magnitude of loss reduction and changes in voltage regulator operations. We find th...

  13. Distribution System Analysis Tools for Studying High Penetration of PV

    E-Print Network [OSTI]

    Distribution System Analysis Tools for Studying High Penetration of PV with Grid Support Features Electric Energy System #12;#12;Distribution System Analysis Tools for Studying High Penetration of PV project titled "Distribution System Analysis Tools for Studying High Penetration of PV with Grid Support

  14. Dynamic Interactions of PV units in Low Volatge Distribution Systems

    E-Print Network [OSTI]

    Pota, Himanshu Roy

    Dynamic Interactions of PV units in Low Volatge Distribution Systems M. J. Hossain, J. Lu Griffith. Abstract--Photovoltaic (PV) units along with other distributed energy resources (DERs) are located close, robust control, stability. I. Introduction The integration level of PV units in low and medium voltage

  15. axonopodis pv passiflorae: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    effective capacity of grid-connected PV power plants. The predicted and actual utility peak load reduction performance of PV power plants are compared for two case studies:...

  16. axonopodis pv citri: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    effective capacity of grid-connected PV power plants. The predicted and actual utility peak load reduction performance of PV power plants are compared for two case studies:...

  17. axonopodis pv malvacearum: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    effective capacity of grid-connected PV power plants. The predicted and actual utility peak load reduction performance of PV power plants are compared for two case studies:...

  18. High Resolution PV Power Modeling for Distribution Circuit Analysis

    SciTech Connect (OSTI)

    Norris, B. L.; Dise, J. H.

    2013-09-01T23:59:59.000Z

    NREL has contracted with Clean Power Research to provide 1-minute simulation datasets of PV systems located at three high penetration distribution feeders in the service territory of Southern California Edison (SCE): Porterville, Palmdale, and Fontana, California. The resulting PV simulations will be used to separately model the electrical circuits to determine the impacts of PV on circuit operations.

  19. Integration Technology for PHEV-Grid-Connectivity, with Support...

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

    Technology for PHEV-Grid-Connectivity, with Support for SAE Electrical Standards Integration Technology for PHEV-Grid-Connectivity, with Support for SAE Electrical Standards 2010...

  20. Ukiah Utilities- PV Buydown Program

    Broader source: Energy.gov [DOE]

    Through Ukiah Utilities’ PV Buydown Program, residential and commercial customers are eligible for a $1.40-per-watt AC rebate on qualifying grid-connected PV systems up to a maximum system size of...

  1. Storage Size Determination for Grid-Connected Photovoltaic Systems

    E-Print Network [OSTI]

    Ru, Yu; Martinez, Sonia

    2011-01-01T23:59:59.000Z

    In this paper, we study the problem of determining the size of battery storage used in grid-connected photovoltaic (PV) systems. In our setting, electricity is generated from PV and is used to supply the demand from loads. Excess electricity generated from the PV can be stored in a battery to be used later on, and electricity must be purchased from the electric grid if the PV generation and battery discharging cannot meet the demand. The objective is to minimize the electricity purchase from the electric grid while at the same time choosing an appropriate battery size. More specifically, we want to find a unique critical value (denoted as $E_{max}^c$) of the battery size such that the cost of electricity purchase remains the same if the battery size is larger than or equal to $E_{max}^c$, and the cost is strictly larger if the battery size is smaller than $E_{max}^c$. We propose an upper bound on $E_{max}^c$, and show that the upper bound is achievable for certain scenarios. For the case with ideal PV generat...

  2. Development of New Three-Level Current-Source Inverter for Grid Connected Photovoltaic System

    E-Print Network [OSTI]

    Fujimoto, Hiroshi

    photovoltaic system 1. INTRODUCTION Solid state inverters allow to put photovoltaic (PV) systems into the powerDevelopment of New Three-Level Current-Source Inverter for Grid Connected Photovoltaic System-phase three-level current source inverter (CSI) driven by a single gate-drive power supply in both chopper

  3. Honeywell Parallon Grid-connect Tests Honeywell Grid-connect Tests

    E-Print Network [OSTI]

    Appendix C Honeywell Parallon Grid-connect Tests 12/20/2000 #12;Honeywell Grid-connect Tests 12 power Engine Speed Figure C-1: Ramp Down Tests ­ Power and Shaft Speed ­ 15 kW Steps #12;Honeywell Grid Figure C-2: Ramp Down Tests ­ Power and Turbine Exit Temperature ­ 15 kW Steps #12;Honeywell Grid

  4. Modeling Distribution Connected PV and Interconnection Study...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    load and solar variability Modelling regulator controls Interaction between smart inverters and regulator load drop compensator control 9 Base Case With PV Percent Change...

  5. Interconnecting PV on New York City's Secondary Network Distribution System

    SciTech Connect (OSTI)

    Anderson, K.; Coddington, M.; Burman, K.; Hayter, S.; Kroposki, B.; Watson, A.

    2009-12-01T23:59:59.000Z

    This study describes technical assistance provided by NREL to help New York City and Con Edison improve the interconnection of distributed PV systems on a secondary network distribution system.

  6. Summary Review of Advanced Inverter Technologies for Residential PV Systems

    E-Print Network [OSTI]

    Summary Review of Advanced Inverter Technologies for Residential PV Systems This report summarizes current and emerging standards for residential PV systems and identifies the status of emerging inverter................................................................................................ 7 3. Grid-Connected PV inverters available in US

  7. Utility-Scale Solar Power Converter: Agile Direct Grid Connect Medium Voltage 4.7-13.8 kV Power Converter for PV Applications Utilizing Wide Band Gap Devices

    SciTech Connect (OSTI)

    None

    2012-01-25T23:59:59.000Z

    Solar ADEPT Project: Satcon is developing a compact, lightweight power conversion device that is capable of taking utility-scale solar power and outputting it directly into the electric utility grid at distribution voltage levels—eliminating the need for large transformers. Transformers “step up” the voltage of the power that is generated by a solar power system so it can be efficiently transported through transmission lines and eventually “stepped down” to usable voltages before it enters homes and businesses. Power companies step up the voltage because less electricity is lost along transmission lines when the voltage is high and current is low. Satcon’s new power conversion devices will eliminate these heavy transformers and connect a utility-scale solar power system directly to the grid. Satcon’s modular devices are designed to ensure reliability—if one device fails it can be bypassed and the system can continue to run.

  8. City of Healdsburg- PV Incentive Program

    Broader source: Energy.gov [DOE]

    Through the City of Healdsburg's PV Buy-down Program, residential and commercial customers are eligible for rebate on qualifying grid-connected PV systems. In keeping with SB1, (the California...

  9. Optimal Solar PV Arrays Integration for Distributed Generation

    SciTech Connect (OSTI)

    Omitaomu, Olufemi A [ORNL; Li, Xueping [University of Tennessee, Knoxville (UTK)

    2012-01-01T23:59:59.000Z

    Solar photovoltaic (PV) systems hold great potential for distributed energy generation by installing PV panels on rooftops of residential and commercial buildings. Yet challenges arise along with the variability and non-dispatchability of the PV systems that affect the stability of the grid and the economics of the PV system. This paper investigates the integration of PV arrays for distributed generation applications by identifying a combination of buildings that will maximize solar energy output and minimize system variability. Particularly, we propose mean-variance optimization models to choose suitable rooftops for PV integration based on Markowitz mean-variance portfolio selection model. We further introduce quantity and cardinality constraints to result in a mixed integer quadratic programming problem. Case studies based on real data are presented. An efficient frontier is obtained for sample data that allows decision makers to choose a desired solar energy generation level with a comfortable variability tolerance level. Sensitivity analysis is conducted to show the tradeoffs between solar PV energy generation potential and variability.

  10. Prospects for grid-connected solar PV in Kenya

    E-Print Network [OSTI]

    Rose, Amy Michelle

    2013-01-01T23:59:59.000Z

    Kenya's electric power system is heavily reliant on hydropower, leaving it vulnerable during recurring droughts. Supply shortfalls are currently met through the use of expensive leased diesel generation. Therefore, plans ...

  11. Performance Parameters for Grid-Connected PV Systems

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's Possible for RenewableSpeedingBiomassPPPO WebsitePalmsthe Price (Percent)5National Renewable

  12. Interconnecting PV on New York City's Secondary Network Distribution System

    SciTech Connect (OSTI)

    K. Anderson; M. Coddington; K. Burman; S. Hayter; B. Kroposki; and A. Watson

    2009-11-30T23:59:59.000Z

    The U.S. Department of Energy (DOE) has teamed with cities across the country through the Solar America Cities (SAC) partnership program to help reduce barriers and accelerate implementation of solar energy. The New York City SAC team is a partnership between the City University of New York (CUNY), the New York City Mayor s Office of Long-term Planning and Sustainability, and the New York City Economic Development Corporation (NYCEDC).The New York City SAC team is working with DOE s National Renewable Energy Laboratory (NREL) and Con Edison, the local utility, to develop a roadmap for photovoltaic (PV) installations in the five boroughs. The city set a goal to increase its installed PV capacity from1.1 MW in 2005 to 8.1 MW by 2015 (the maximum allowed in 2005). A key barrier to reaching this goal, however, is the complexity of the interconnection process with the local utility. Unique challenges are associated with connecting distributed PV systems to secondary network distribution systems (simplified to ���¢��������networks���¢������� in this report). Although most areas of the country use simpler radial distribution systems to distribute electricity, larger metropolitan areas like New York City typically use networks to increase reliability in large load centers. Unlike the radial distribution system, where each customer receives power through a single line, a network uses a grid of interconnected lines to deliver power to each customer through several parallel circuits and sources. This redundancy improves reliability, but it also requires more complicated coordination and protection schemes that can be disrupted by energy exported from distributed PV systems. Currently, Con Edison studies each potential PV system in New York City to evaluate the system s impact on the network, but this is time consuming for utility engineers and may delay the customer s project or add cost for larger installations. City leaders would like to streamline this process to facilitate faster, simpler, and less expensive distributed PV system interconnections. To assess ways to improve the interconnection process, NREL conducted a four-part study with support from DOE. The NREL team then compiled the final reports from each study into this report. In Section 1���¢��������PV Deployment Analysis for New York City���¢��������we analyze the technical potential for rooftop PV systems in the city. This analysis evaluates potential PV power production in ten Con Edison networks of various locations and building densities (ranging from high density apartments to lower density single family homes). Next, we compare the potential power production to network loads to determine where and when PV generation is most likely to exceed network load and disrupt network protection schemes. The results of this analysis may assist Con Edison in evaluating future PV interconnection applications and in planning future network protection system upgrades. This analysis may also assist other utilities interconnecting PV systems to networks by defining a method for assessing the technical potential of PV in the network and its impact on network loads. Section 2���¢��������A Briefing for Policy Makers on Connecting PV to a Network Grid���¢��������presents an overview intended for nontechnical stakeholders. This section describes the issues associated with interconnecting PV systems to networks, along with possible solutions. Section 3���¢��������Technical Review of Concerns and Solutions to PV Interconnection in New Y

  13. Understanding the Benefits of Dispersed Grid-Connected Photovoltaics: From Avoiding the Next Major Outage to Taming Wholesale Power Markets

    SciTech Connect (OSTI)

    Letendre, Steven E.; Perez, Richard

    2006-07-15T23:59:59.000Z

    Thanks to new solar resource assessment techniques using cloud cover data available from geostationary satellites, it is apparent that grid-connected PV installations can serve to enhance electric grid reliability, preventing or hastening recovery from major power outages and serving to mitigate extreme price spikes in wholesale energy markets. (author)

  14. Time series power flow analysis for distribution connected PV generation.

    SciTech Connect (OSTI)

    Broderick, Robert Joseph; Quiroz, Jimmy Edward; Ellis, Abraham; Reno, Matthew J. [Georgia Institute of Technology, Atlanta, GA; Smith, Jeff [Electric Power Research Institute, Knoxville, TN; Dugan, Roger [Electric Power Research Institute, Knoxville, TN

    2013-01-01T23:59:59.000Z

    Distributed photovoltaic (PV) projects must go through an interconnection study process before connecting to the distribution grid. These studies are intended to identify the likely impacts and mitigation alternatives. In the majority of the cases, system impacts can be ruled out or mitigation can be identified without an involved study, through a screening process or a simple supplemental review study. For some proposed projects, expensive and time-consuming interconnection studies are required. The challenges to performing the studies are twofold. First, every study scenario is potentially unique, as the studies are often highly specific to the amount of PV generation capacity that varies greatly from feeder to feeder and is often unevenly distributed along the same feeder. This can cause location-specific impacts and mitigations. The second challenge is the inherent variability in PV power output which can interact with feeder operation in complex ways, by affecting the operation of voltage regulation and protection devices. The typical simulation tools and methods in use today for distribution system planning are often not adequate to accurately assess these potential impacts. This report demonstrates how quasi-static time series (QSTS) simulation and high time-resolution data can be used to assess the potential impacts in a more comprehensive manner. The QSTS simulations are applied to a set of sample feeders with high PV deployment to illustrate the usefulness of the approach. The report describes methods that can help determine how PV affects distribution system operations. The simulation results are focused on enhancing the understanding of the underlying technical issues. The examples also highlight the steps needed to perform QSTS simulation and describe the data needed to drive the simulations. The goal of this report is to make the methodology of time series power flow analysis readily accessible to utilities and others responsible for evaluating potential PV impacts.

  15. PVUSA experience with power conversion for grid-connected photovoltaic systems

    SciTech Connect (OSTI)

    Stolte, W.

    1995-11-01T23:59:59.000Z

    The Photovoltaics for Utility Scale Application (PVUSA) project was established to demonstrate photovoltaic (PV) systems in grid-connected utility applications. One of PVUSA`s key objectives is to evaluate the performance, reliability, and cost of the PV balance of system (BOS). Power conditioning units (PCUs) are the interface between the dc PV arrays and the ac utility lines, and have proved to be the most critical element in grid-connected PV systems. There are five different models of PCUs at PVUSA`s Davis and Kerman sites. This report describes the design, testing, performance characteristics, and maintenance history of each of these PCUs. PVUSA required PCUs in the power range 25 kW to 500 kW which could operate automatically and reliably under changing conditions of sunlight and changing conditions on the utility grid. Although a number of manufacturers can provide PCUs in this power range, none of these PCUs have been produced in sufficient quantity to allow refinement of a particular model into the highly reliable unit needed for long-term, unattended operation. Factory tests were useful but limited by the inability to test under full power and changing power conditions. The inability to completely test PCUs at the factory resulted in difficulty during startup, field testing, and subsequent operation. PVUSA has made significant progress in understanding the requirements for PCUs in grid-connected PV applications and improving field performance. This record of PVUSA`s experience with a variety of PCUs is intended to help utilities and their suppliers identify and retain the good performance characteristics of PCUs, and to make improvements where necessary to meet the needs of utilities.

  16. Public Meeting: Physical Characterization of Smart and Grid-Connected...

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

    These documents contain slide decks presented at the Physical Characterization of Smart and Grid-Connected Commercial and Residential Buildings End-Use Equipment and...

  17. Modeling Grid-Connected Hybrid Electric Vehicles Using ADVISOR

    SciTech Connect (OSTI)

    Markel, T.; Wipke, K.

    2001-01-01T23:59:59.000Z

    Presents an electric utility grid-connected energy management strategy for a parallel hybrid electric vehicle using ADVISOR, a modeling tool.

  18. Robust control strategy for PV system integration in distribution systems M.J. Hossain a,

    E-Print Network [OSTI]

    Pota, Himanshu Roy

    Robust control strategy for PV system integration in distribution systems M.J. Hossain a, , T t s " Robust control provides flexible photovoltaic (PV) accommodations. " A robust PV control can significantly enhance the penetration level. " The change in volatile PV generations is considered

  19. Exploring the Economic Value of EPAct 2005's PV Tax Credits

    E-Print Network [OSTI]

    Bolinger, Mark; Wiser, Ryan; Ing, Edwin

    2006-01-01T23:59:59.000Z

    Exploring the Economic Value of EPAct 2005’s PV Tax CreditsEconomic Value of EPAct 2005’s PV Tax Credits Mark Bolingerfor grid-connected photovoltaics (PV) in the US has grown

  20. Exploring the Economic Value of EPAct 2005's PV Tax Credits

    E-Print Network [OSTI]

    Bolinger, Mark A

    2010-01-01T23:59:59.000Z

    to support a greater number PV systems at the reduced grantEconomic Value of EPAct 2005’s PV Tax Credits Mark Bolingerfor grid-connected photovoltaics (PV) in the US has grown

  1. Designing PV Incentive Programs to Promote System Performance: A Review of Current Practice

    E-Print Network [OSTI]

    Barbose, Galen; Wiser, Ryan; Bolinger, Mark

    2006-01-01T23:59:59.000Z

    CCEF Small PV Program System Modules Inverters InstallationUL-1703 for PV modules and UL-1741 for inverters and otherfor Grid-Connected PV Systems Rated Output Modules Inverters

  2. A grid-connected photovoltaic power conversion system with single-phase multilevel inverter

    SciTech Connect (OSTI)

    Beser, Ersoy; Arifoglu, Birol; Camur, Sabri; Beser, Esra Kandemir [Department of Electrical Engineering, Kocaeli University (Turkey)

    2010-12-15T23:59:59.000Z

    This paper presents a grid-connected photovoltaic (PV) power conversion system based on a single-phase multilevel inverter. The proposed system fundamentally consists of PV arrays and a single-phase multilevel inverter structure. First, configuration and structural parts of the PV assisted inverter system are introduced in detail. To produce reference output voltage waves, a simple switching strategy based on calculating switching angles is improved. By calculated switching angles, the reference signal is produced as a multilevel shaped output voltage wave. The control algorithm and operational principles of the proposed system are explained. Operating PV arrays in the same load condition is a considerable point; therefore a simulation study is performed to arrange the PV arrays. After determining the number and connection types of the PV arrays, the system is configured through the arrangement of the PV arrays. The validity of the proposed system is verified through simulations and experimental study. The results demonstrate that the system can achieve lower total harmonic distortion (THD) on the output voltage and load current, and it is capable of operating synchronous and transferring power values having different characteristic to the grid. Hence, it is suitable to use the proposed configuration as a PV power conversion system in various applications. (author)

  3. Distributed Solar PV for Electricity System Resiliency: Policy and Regulatory Considerations (Brochure)

    SciTech Connect (OSTI)

    Not Available

    2014-11-01T23:59:59.000Z

    Distributed Solar PV systems have the potential of increasing the grid's resiliency to unforeseen events, such as extreme weather events and attacks. This paper presents the role that distributed PV can play in electric grid resiliency, introduces basic system design requirements and options, and discusses the regulatory and policy options for supporting the use of distributed PV for the purpose of increased electricity resiliency.

  4. Distributed Power Electronics for PV Systems (Presentation)

    SciTech Connect (OSTI)

    Deline, C.

    2011-12-01T23:59:59.000Z

    An overview of the benefits and applications of microinverters and DC power optimizers in residential systems. Some conclusions from this report are: (1) The impact of shade is greater than just the area of shade; (2) Additional mismatch losses include panel orientation, panel distribution, inverter voltage window, soiling; (3) Per-module devices can help increase performance, 4-12% or more depending on the system; (4) Value-added benefits (safety, monitoring, reduced design constraints) are helping their adoption; and (5) The residential market is growing rapidly. Efficiency increases, cost reductions are improving market acceptance. Panel integration will further reduce price and installation cost. Reliability remains an unknown.

  5. Designing PV Incentive Programs to Promote Performance: A Review of Current Practice in the U.S.

    E-Print Network [OSTI]

    Barbose, Galen; Wiser, Ryan; Bolinger, Mark

    2008-01-01T23:59:59.000Z

    with Large-scale Implementation of Domestic PV Systems andwith Large PV Systems on Buildings in Japan. Progress inPerformance of Grid-connected PV Systems on Buildings in

  6. SMUD- PV Residential Retrofit Buy-Down

    Broader source: Energy.gov [DOE]

    SMUD offers an incentive of $0.20 per watt (W) AC to residential customers who install grid-connected photovoltaic (PV) systems. Customers do not have to contract directly with SMUD-approved...

  7. Präsentation Bernhard Gatzka PV*SOL Expert

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    design and calculation of photovoltaic systems, including grid-connected, off-grid and battery backed-up systems. "Shading Calculation in PV*SOL Expert" presented at the 2013...

  8. Designing PV Incentive Programs to Promote System Performance: A Review of Current Practice

    E-Print Network [OSTI]

    Barbose, Galen; Wiser, Ryan; Bolinger, Mark

    2006-01-01T23:59:59.000Z

    reliability-related industry standards exist for inverters. Other equipment andEquipment and Installation Standards for Grid-Connected PV Systems Rated Output Modules Inverters Systems (grid-connected) Product ReliabilityEquipment and installation standards ensure that PV system components and installations meet minimum industry standards related to safety, reliability,

  9. A Distributed Approach to MPPT for PV Sub-Module Differential Power Processing

    E-Print Network [OSTI]

    Liberzon, Daniel

    optimizers or micro-inverters, DPPs only need to process the power difference between series connected PVA Distributed Approach to MPPT for PV Sub-Module Differential Power Processing Shibin Qin, Stanton for differential power processing in photovoltaic (PV) applica- tions. This distributed algorithm performs true

  10. THE INTEGRATION AND CONTROL OF MULTIFUNCTIONAL STATIONARY PV-BATTERY SYSTEMS IN SMART DISTRIBUTION GRID

    E-Print Network [OSTI]

    Berning, Torsten

    ) in presence of photovoltaic (PV) panel on the view of techno economic optimal sizing taking the considerationTHE INTEGRATION AND CONTROL OF MULTIFUNCTIONAL STATIONARY PV-BATTERY SYSTEMS IN SMART DISTRIBUTION stationary battery energy storage systems (BESS) in the public low-voltage distribution grid in order

  11. Three-Phase Modular Cascaded H-Bridge Multilevel Inverter with Individual MPPT for Grid-Connected Photovoltaic Systems

    SciTech Connect (OSTI)

    Xiao, Bailu [ORNL; Hang, Lijun [ORNL; Riley, Cameron [University of Tennessee, Knoxville (UTK); Tolbert, Leon M [ORNL; Ozpineci, Burak [ORNL

    2013-01-01T23:59:59.000Z

    A three-phase modular cascaded H-bridge multilevel inverter for a grid-connected photovoltaic (PV) system is presented in this paper. To maximize the solar energy extraction of each PV string, an individual maximum power point tracking (MPPT) control scheme is applied, which allows the independent control of each dc-link voltage. PV mismatches may introduce unbalanced power supplied to the three-phase system. To solve this issue, a control scheme with modulation compensation is proposed. The three-phase modular cascaded multilevel inverter prototype has been built. Each H-bridge is connected to a 185 W solar panel. Simulation and experimental results are presented to validate the proposed ideas.

  12. DOE Publishes Notice of Public Meeting for Smart Grid-connected...

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

    for Smart Grid-connected Buildings DOE Publishes Notice of Public Meeting for Smart Grid-connected Buildings April 8, 2014 - 9:30am Addthis DOE has published a notice of public...

  13. First U.S. Grid-Connected Offshore Wind Turbine Installed Off...

    Office of Environmental Management (EM)

    First U.S. Grid-Connected Offshore Wind Turbine Installed Off the Coast of Maine First U.S. Grid-Connected Offshore Wind Turbine Installed Off the Coast of Maine October 1, 2013 -...

  14. Performance Test Protocol for Evaluating Inverters Used in Grid-Connected

    E-Print Network [OSTI]

    Performance Test Protocol for Evaluating Inverters Used in Grid-Connected Photovoltaic Systems....................................................................................... 6 4.1 Inverter Size

  15. Advanced Inverter Technology for High Penetration Levels of PV Generation in Distribution Systems

    SciTech Connect (OSTI)

    Schauder, C.

    2014-03-01T23:59:59.000Z

    This subcontract report was completed under the auspices of the NREL/SCE High-Penetration Photovoltaic (PV) Integration Project, which is co-funded by the U.S. Department of Energy (DOE) Office of Energy Efficiency and Renewable Energy (EERE) and the California Solar Initiative (CSI) Research, Development, Demonstration, and Deployment (RD&D) program funded by the California Public Utility Commission (CPUC) and managed by Itron. This project is focused on modeling, quantifying, and mitigating the impacts of large utility-scale PV systems (generally 1-5 MW in size) that are interconnected to the distribution system. This report discusses the concerns utilities have when interconnecting large PV systems that interconnect using PV inverters (a specific application of frequency converters). Additionally, a number of capabilities of PV inverters are described that could be implemented to mitigate the distribution system-level impacts of high-penetration PV integration. Finally, the main issues that need to be addressed to ease the interconnection of large PV systems to the distribution system are presented.

  16. IEEE TRANSACTIONS ON POWER ELECTRONICS 1 A Hybrid Power Control Concept for PV Inverters with Reduced

    E-Print Network [OSTI]

    Kerekes, Tamas

    IEEE TRANSACTIONS ON POWER ELECTRONICS 1 Letters A Hybrid Power Control Concept for PV Inverters- cept for grid-connected Photovoltaic (PV) inverters. The control strategy is based on either a Maximum utilization factor of PV inverters, and thus to cater for a higher penetration level of PV systems

  17. A novel multi-model neuro-fuzzy-based MPPT for three-phase grid-connected photovoltaic system

    SciTech Connect (OSTI)

    Chaouachi, Aymen; Kamel, Rashad M.; Nagasaka, Ken [Department of Electronic and Information Engineering, Tokyo University of Agriculture and Technology, Nakamachi (Japan)

    2010-12-15T23:59:59.000Z

    This paper presents a novel methodology for Maximum Power Point Tracking (MPPT) of a grid-connected 20 kW photovoltaic (PV) system using neuro-fuzzy network. The proposed method predicts the reference PV voltage guarantying optimal power transfer between the PV generator and the main utility grid. The neuro-fuzzy network is composed of a fuzzy rule-based classifier and three multi-layered feed forwarded Artificial Neural Networks (ANN). Inputs of the network (irradiance and temperature) are classified before they are fed into the appropriated ANN for either training or estimation process while the output is the reference voltage. The main advantage of the proposed methodology, comparing to a conventional single neural network-based approach, is the distinct generalization ability regarding to the nonlinear and dynamic behavior of a PV generator. In fact, the neuro-fuzzy network is a neural network based multi-model machine learning that defines a set of local models emulating the complex and nonlinear behavior of a PV generator under a wide range of operating conditions. Simulation results under several rapid irradiance variations proved that the proposed MPPT method fulfilled the highest efficiency comparing to a conventional single neural network and the Perturb and Observe (P and O) algorithm dispositive. (author)

  18. PV Ramping in a Distributed Generation Environment: A Study Using Solar Measurements; Preprint

    SciTech Connect (OSTI)

    Sengupta, M.; Keller, J.

    2012-06-01T23:59:59.000Z

    Variability in Photovoltaic (PV) generation resulting from variability in the solar radiation over the PV arrays is a topic of continuing concern for those involved with integrating renewables onto existing electrical grids. The island of Lanai, Hawaii is an extreme example of the challenges that integrators will face due to the fact that it is a small standalone grid. One way to study this problem is to take high-resolution solar measurements in multiple locations and model simultaneous PV production for various sizes at those locations. The National Renewable Energy Laboratory (NREL) collected high-resolution solar data at four locations on the island where proposed PV plants will be deployed in the near future. This data set provides unique insight into how the solar radiation may vary between points that are proximal in distance, but diverse in weather, due to the formation of orographic clouds in the center of the island. Using information about each proposed PV plant size, power output was created at high resolution. The team analyzed this output to understand power production ramps at individual locations and the effects of aggregating the production from all four locations. Hawaii is a unique environment, with extremely variable events occurring on a daily basis. This study provided an excellent opportunity for understanding potential worst-case scenarios for PV ramping. This paper provides an introduction to the datasets that NREL collected over a year and a comprehensive analysis of PV variability in a distributed generation scenario.

  19. High Penetration of Photovoltaic (PV) Systems into the Distribution Grid, Workshop Report, February 24-25, 2009

    SciTech Connect (OSTI)

    Not Available

    2009-06-01T23:59:59.000Z

    Outcomes from the EERE Solar Energy Technologies Program workshop on high penetration of photovoltaic (PV) systems into the distribution grid, Feb. 24-25, 2009, Ontario, Calif.

  20. GAP analysis towards a design qualification standard development for grid-connected photovoltaic inverters.

    SciTech Connect (OSTI)

    Tamizhmani, Govindasamy (Arizona State University, Tempe, AZ); Granata, Jennifer E.; Maracas, George (Arizona State University, Tempe, AZ); Ayyanar, Raja (Arizona State University, Tempe, AZ); Marinella, Matthew; Venkataramanan, Sai Balasubramanian Alampoondi (Arizona State University, Tempe, AZ)

    2011-06-01T23:59:59.000Z

    A dedicated design qualification standard for PV inverters does not exist. Development of a well-accepted design qualification standard, specifically for PV inverters will significantly improve the reliability and performance of inverters. The existing standards for PV inverters such as ANSI/UL 1741 and IEC 62109-1 primarily focus on safety of PV inverters. The IEC 62093 discusses inverter qualification but it includes all the BOS components. There are other general standards for distributed generators including the IEEE 1547 series of standards which cover major concerns like utility integration but they are not dedicated to PV inverters and are not written from a design qualification point of view. In this paper some of the potential requirements for a design qualification standard for PV inverters are addressed. The missing links in existing PV inverter related standards are identified and with the IEC 62093 as a guideline, the possible inclusions in the framework for a dedicated design qualification standard of PV inverter are discussed. Some of the key missing links are related to electric stress tests. Hence, a method to adapt the existing surge withstand test standards for use in design qualification standard of PV inverter is presented.

  1. Analysis of the Impacts of Distribution-Connected PV Using High-Speed Data Sets: Preprint

    SciTech Connect (OSTI)

    Bank, J.; Mather, B.

    2013-03-01T23:59:59.000Z

    This paper, presented at the IEEE Green Technologies Conference 2013, utilizes information from high resolution data acquisition systems developed at the National Renewable Energy Laboratory and deployed on a high-penetration PV distribution system to analyze the variability of different electrical parameters. High-resolution solar irradiance data is also available in the same area which is used to characterize the available resource and how it affects the electrical characteristics of the study circuit. This paper takes a data-driven look at the variability caused by load and compares those results against times when significant PV production is present. Comparisons between the variability in system load and the variability of distributed PV generation are made.

  2. Modeling and Grid impedance Variation Analysis of Parallel Connected Grid Connected Inverter

    E-Print Network [OSTI]

    Bak, Claus Leth

    Modeling and Grid impedance Variation Analysis of Parallel Connected Grid Connected Inverter based in the same grid interface conditions by means of impedance-based analysis and modeling. Unlike the single grid connected inverter, it is found that multiple parallel connected inverters and grid impedance can

  3. IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, VOL. 57, NO. 10, OCTOBER 2010 3431 A Universal Grid-Connected Fuel-Cell Inverter for

    E-Print Network [OSTI]

    Mazumder, Sudip K.

    . INTRODUCTION THE utilization of fuel cells for distributed power gen- eration requires the development of a low-cost-Connected Fuel-Cell Inverter for Residential Application Sudip K. Mazumder, Senior Member, IEEE, Rajni K. Burra--This paper describes a universal fuel-cell-based grid- connected inverter design with digital

  4. Remote performance check and automated failure identification for grid-connected PV systems

    E-Print Network [OSTI]

    Heinemann, Detlev

    . Stettler5 , P. Toggweiler5 , S. Bofinger6 , M. Schneider6 , G. Heilscher6 , D. Heinemann1 1 Oldenburg

  5. 65Home Power #25 October / November 1991 s PV systems become more widely distributed, the requirements established by

    E-Print Network [OSTI]

    Johnson, Eric E.

    handling equipment. In many cases, charge controllers, inverters, and other PV components may be required65Home Power #25 · October / November 1991 s PV systems become more widely distributed. Each metal case (on switch gear, module frames, charge controllers, inverters, etc.) of an alternate

  6. The Value of Distributed Solar Electric Generation to San Antonio

    SciTech Connect (OSTI)

    Jones, Nic [Solar San Antonio, TX (United States); Norris, Ben [Clean Power Research, Napa, CA (United States); Meyer, Lisa [City of San Antonio, TX (United States)

    2013-02-14T23:59:59.000Z

    This report presents an analysis of value provided by grid-connected, distributed PV in San Antonio from a utility perspective. The study quantified six value components, summarized in Table ES- 1. These components represent the benefits that accrue to the utility, CPS Energy, in accepting solar onto the grid. This analysis does not treat the compensation of value, policy objectives, or cost-effectiveness from the retail consumer perspective.

  7. Strategic Sequencing for State Distributed PV Policies: A Quantitative Analysis of Policy Impacts and Interactions

    SciTech Connect (OSTI)

    Doris, E.; Krasko, V.A.

    2012-10-01T23:59:59.000Z

    State and local policymakers show increasing interest in spurring the development of customer-sited distributed generation (DG), in particular solar photovoltaic (PV) markets. Prompted by that interest, this analysis examines the use of state policy as a tool to support the development of a robust private investment market. This analysis builds on previous studies that focus on government subsidies to reduce installation costs of individual projects and provides an evaluation of the impacts of policies on stimulating private market development.

  8. An economic analysis of grid-connected residential solar photovoltaic power systems

    E-Print Network [OSTI]

    Carpenter, Paul R.

    The question of the utility grid-connected residential market for photovoltaics is examined from a user-ownership perspective. The price is calculated at which the user would be economically indifferent between

  9. Designs for ultra-high efficiency grid-connected power conversion

    E-Print Network [OSTI]

    Pierquet, Brandon J. (Brandon Joseph)

    2011-01-01T23:59:59.000Z

    Grid connected power conversion is an absolutely critical component of many established and developing industries, such as information technology, telecommunications, renewable power generation (e.g. photovoltaic and wind), ...

  10. The Impact of Rate Design and Net Metering on the Bill Savings from Distributed PV for Residential Customers in California

    SciTech Connect (OSTI)

    Darghouth, Naim; Barbose, Galen; Wiser, Ryan

    2010-03-30T23:59:59.000Z

    Net metering has become a widespread policy in the U.S. for supporting distributed photovoltaics (PV) adoption. Though specific design details vary, net metering allows customers with PV to reduce their electric bills by offsetting their consumption with PV generation, independent of the timing of the generation relative to consumption - in effect, compensating the PV generation at retail electricity rates (Rose et al. 2009). While net metering has played an important role in jump-starting the residential PV market in the U.S., challenges to net metering policies have emerged in a number of states and contexts, and alternative compensation methods are under consideration. Moreover, one inherent feature of net metering is that the value of the utility bill savings it provides to customers with PV depends heavily on the structure of the underlying retail electricity rate, as well as on the characteristics of the customer and PV system. Consequently, the value of net metering - and the impact of moving to alternative compensation mechanisms - can vary substantially from one customer to the next. For these reasons, it is important for policymakers and others that seek to support the development of distributed PV to understand both how the bill savings varies under net metering, and how the bill savings under net metering compares to other possible compensation mechanisms. To advance this understanding, we analyze the bill savings from PV for residential customers of California's two largest electric utilities, Pacific Gas and Electric (PG&E) and Southern California Edison (SCE). The analysis is based on hourly load data from a sample of 215 residential customers located in the service territories of the two utilities, matched with simulated hourly PV production for the same time period based on data from the nearest of 73 weather stations in the state.

  11. A High Power Density DC-DC Converter for Distributed PV Architectures

    SciTech Connect (OSTI)

    Mohammed S. Agamy; Song Chi; Ahmed Elasser; Maja Harfman-Todorovic; Yan Jiang; Frank Mueller; Fengfeng Tao

    2012-06-01T23:59:59.000Z

    In order to maximize solar energy harvesting capabilities, power converters have to be designed for high efficiency and good MPPT and voltage/current performance. When many converters are used in distributed systems, power density also becomes an important factor as it allows for simpler system integration. In this paper a high power density string dc-dc converter suitable for distributed medium to large scale PV installation is presented. A simple partial power processing topology, implemented with all silicon carbide devices provides high efficiency as well as high power density. A 3.5kW, 100kHz converter is designed and tested to verify the proposed methods.

  12. backfed from utility-interactive PV inverters. This equation expresses this ratings requirement

    E-Print Network [OSTI]

    Johnson, Eric E.

    backfed from utility-interactive PV inverters. This equation expresses this ratings requirement: PV Changing Codes & Grid Connection by John Wiles PV Inverter 15 A 100 A 400 A 100 A 400 A 1,000 A Grid 100 to at least 1,400 A (400 + 1,000 > 1,000) - - - PV Inverter 15 A 100 A 400 A 100 A 400 A 1,000 A Grid 100 A 10

  13. World Renewable Energy Congress 2011 Sweden Photovoltaic Technology (PV) 8-11 May 2011, Linkping, Sweden

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    energy and natural-gas-fuel power plants [3,4], new LCA databases have been built to complyWorld Renewable Energy Congress 2011 ­ Sweden Photovoltaic Technology (PV) 8-11 May 2011, Linköping, Sweden Environmental impacts of large-scale grid-connected ground-mounted PV installations Antoine Beylot

  14. Formulating a simplified equivalent representation of distribution circuits for PV impact studies.

    SciTech Connect (OSTI)

    Reno, Matthew J.; Broderick, Robert Joseph; Grijalva, Santiago [Georgia Institute of Technology, Atlanta, GA

    2013-04-01T23:59:59.000Z

    With an increasing number of Distributed Generation (DG) being connected on the distribution system, a method for simplifying the complexity of the distribution system to an equivalent representation of the feeder is advantageous for streamlining the interconnection study process. The general characteristics of the system can be retained while reducing the modeling effort required. This report presents a method of simplifying feeders to only specified buses-of-interest. These buses-of-interest can be potential PV interconnection locations or buses where engineers want to verify a certain power quality. The equations and methodology are presented with mathematical proofs of the equivalence of the circuit reduction method. An example 15-bus feeder is shown with the parameters and intermediate example reduction steps to simplify the circuit to 4 buses. The reduced feeder is simulated using PowerWorld Simulator to validate that those buses operate with the same characteristics as the original circuit. Validation of the method is also performed for snapshot and time-series simulations with variable load and solar energy output data to validate the equivalent performance of the reduced circuit with the interconnection of PV.

  15. Minnesota Power- Solar-Electric (PV) Rebate Program

    Broader source: Energy.gov [DOE]

    Minnesota Power offers a rebate of $1,000 per kilowatt (kW) DC for grid-connected solar-electric (PV) systems, with a maximum award of $20,000 per customer or 60% installed costs per customer. This...

  16. Real Power and Reactive Power Control of a Three-Phase Single-Stage-PV System and PV voltage Stability

    SciTech Connect (OSTI)

    Li, Huijuan [ORNL] [ORNL; Xu, Yan [ORNL] [ORNL; Adhikari, Sarina [ORNL] [ORNL; Rizy, D Tom [ORNL] [ORNL; Li, Fangxing [ORNL] [ORNL; Irminger, Philip [ORNL] [ORNL

    2012-01-01T23:59:59.000Z

    Grid-connected photovoltaic (PV) systems with power electronic interfaces can provide both real and reactive power to meet power system needs with appropriate control algorithms. This paper presents the control algorithm design for a three-phase single-stage grid-connected PV inverter to achieve either maximum power point tracking (MPPT) or a certain amount of real power injection, as well as the voltage/var control. The switching between MPPT control mode and a certain amount of real power control mode is automatic and seamless. Without the DC-to-DC booster stage, PV DC voltage stability is an important issue in the control design especially when the PV inverter is operating at maximum power point (MPP) with voltage/var control. The PV DC voltage collapse phenomenon and its reason are discussed. The method based on dynamic correction of the PV inverter output is proposed to ensure PV DC voltage stability. Simulation results of the single-stage PV system during system disturbances and fast solar irradiation changes confirm that the proposed control algorithm for single-stage PV inverters can provide appropriate real and reactive power services and ensure PV DC voltage stability during dynamic system operation and atmospheric conditions.

  17. Compatibility Study of Protective Relaying in a Grid-Connected Fuel Cell

    SciTech Connect (OSTI)

    Staunton, R.H.

    2004-04-15T23:59:59.000Z

    A 200-kW fuel cell produced by International Fuel Cells (IFC), a United Technologies Company, began operation at the National Transportation Research Center (NTRC) in early June 2003. The NTRC is a joint Oak Ridge National laboratory (ORNL) and University of Tennessee research facility located in Knoxville, Tennessee. This research activity investigated the protective relaying functions of this fully commercialized fuel cell power plant, which uses ''synthesized'' protective relays. The project's goal is to characterize the compatibility between the fuel cell's interconnection protection system and the local distribution system or electric power system (EPS). ORNL, with assistance from the Electric Power Research Institute-Power Electronics Applications Center (EPRI-PEAC) in Knoxville, Tennessee, monitored and characterized the system compatibility over a period of 6 months. Distribution utility engineers are distrustful of or simply uncomfortable with the protective relaying and hardware provided as part of distributed generation (DG) plants. Part of this mistrust is due to the fact that utilities generally rely on hardware from certain manufacturers whose reliability is well established based on performance over many years or even decades. Another source of concern is the fact that fuel cells and other types of DG do not use conventional relays but, instead, the protective functions of conventional relays are simulated by digital circuits in the distributed generator's grid interface control unit. Furthermore, the testing and validation of internal protection circuits of DG are difficult to accomplish and can be changed by the vendor at any time. This study investigated and documented the safety and protective relaying present in the IFC fuel cell, collected data on the operation of the fuel cell, recorded event data during EPS disturbances, and assessed the compatibility of the synthesized protective circuits and the local distribution system. The project also addressed other important and timely issues. For instance, the study includes an evaluation of the effectiveness of the fuel cell's synthesized relay protection scheme relative to the recently issued IEEE 1547 interconnection standard. Together, these activities should serve to reduce the number of unknowns pertaining to unconventional protective circuits, to the benefit of DG manufacturers, vendors, prospective and current users of DG, and electricity suppliers/distributors. Although more grid-connect fuel cell interruptions were encountered in this study than originally anticipated, and the investigation and findings became quite complex, every effort was made to clearly summarize the interconnection causes and issues throughout the report and especially in the summary found in Sect. 4. ORNL's funding of this study is sponsored equally by (1) the Department of Energy's (DOE's) Office of Distributed Energy Resources and (2) the Distributed Generation Technologies program of the Tennessee Valley Authority (TVA).

  18. Reactive power control of grid-connected wind farm based on adaptive dynamic programming

    E-Print Network [OSTI]

    He, Haibo

    Reactive power control of grid-connected wind farm based on adaptive dynamic programming Yufei Tang Wind farm Power system Adaptive control a b s t r a c t Optimal control of large-scale wind farm has of wind farm with doubly fed induction generators (DFIG). Specifically, we investigate the on

  19. Grid-Connected Marine Current Generation System Power Smoothing Control Using Supercapacitors

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    will require the generator to accelerate/decelerate frequently under swell effect and therefore cause severe speed model are described. [n Section III, the turbine model and the generator-side power smooth controlGrid-Connected Marine Current Generation System Power Smoothing Control Using Supercapacitors

  20. Mitigation of Voltage and Current Harmonics in Grid-Connected Microgrids

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

    Mitigation of Voltage and Current Harmonics in Grid-Connected Microgrids Mehdi Savaghebi1 , Josep M-connected microgrids. Two modes of compensation are considered, i.e. voltage and current compensation modes-electronic interface converter to the utility grid or microgrid. Microgrid is a local grid consisting of DGs, energy

  1. REDUCING MISMATCH LOSSES IN GRID-CONNECTED RESIDENTIAL BIPV ARRAYS USING ACTIVE POWER CONVERSION COMPONENTS

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    in plant energy production. The introduction of additional power converters in the plant layout intends/Simulink© environment for each topology using a 3 kWp rooftop-type plant. Simulation results show that a considerableREDUCING MISMATCH LOSSES IN GRID-CONNECTED RESIDENTIAL BIPV ARRAYS USING ACTIVE POWER CONVERSION

  2. MODULAR MULTI-LEVEL CONVERTER BASED HVDC SYSTEM FOR GRID CONNECTION OF OFFSHORE WIND

    E-Print Network [OSTI]

    Chaudhary, Sanjay

    MODULAR MULTI-LEVEL CONVERTER BASED HVDC SYSTEM FOR GRID CONNECTION OF OFFSHORE WIND POWER PLANT U off-shore wind power plants. The MMC consists of a large number of simple voltage sourced converter offshore wind power plants (WPP) because they offer higher energy yield due to a superior wind profile

  3. Abstract--This paper focuses on reviewing grid connection of large offshore wind farms (OWFs) employing current state-of-

    E-Print Network [OSTI]

    Bak, Claus Leth

    1 Abstract--This paper focuses on reviewing grid connection of large offshore wind farms (OWFs Farms. I. INTRODUCTION owadays, offshore wind penetration into the electrical grid is rapidly increasing grid connection in e.g. the UK. Index Terms--HVDC transmission, Pulse width modulation converters, Wind

  4. Sandia National Laboratories: PV

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    ... Photovoltaic Technology and Tour of PV Test Facilities On February 12, 2013, in The Photovoltaics and Distributed Systems Integration Department at Sandia National...

  5. Designing PV Incentive Programs to Promote Performance: A Review of Current Practice in the U.S.

    E-Print Network [OSTI]

    Barbose, Galen; Wiser, Ryan; Bolinger, Mark

    2008-01-01T23:59:59.000Z

    Equipment and Installation Standards for Grid-Connected PV Systems Rated Output Product Reliabilityreliability-related industry standards exist for inverters. Other equipment andEquipment and installation standards ensure that PV system components and installations meet minimum industry standards related to safety, reliability,

  6. ENERGY-10 PV: Photovoltaics, A New Capability (Preprint)

    SciTech Connect (OSTI)

    Balcomb, J.D.; Hayter, S.J. (National Renewable Energy Laboratory); Weaver, N.L. (InterWeaver Consulting)

    2001-02-16T23:59:59.000Z

    This is one of two companion papers that describe the ENERGY-10 PV design-tool computer simulation program. The other paper is titled ''Hourly Simulation of Grid-Connected PV Systems Using Realistic Building Loads.'' While this paper focuses on the implementation method, the companion paper focuses on the PV aspects of the program. The case study in this paper is a residential building application, whereas the case study in the companion paper is a commercial application with an entirely different building load characteristic. Together, they provide a balanced view.

  7. July 11 Public Meeting: Physical Characterization of Grid-Connected Commercial And Residential Building End-Use Equipment And Appliances

    Broader source: Energy.gov [DOE]

    These documents contain the three slide decks presented at the public meeting on the Physical Characterization of Grid-Connected Commercial and Residential Buildings End-Use Equipment and Appliances, held on July 11, 2014 in Washington, DC.

  8. A High Efficiency DC-DC Converter Topology Suitable for Distributed Large Commercial and Utility Scale PV Systems

    SciTech Connect (OSTI)

    Mohammed S. Agamy; Maja Harfman-Todorovic; Ahmed Elasser; Robert L. Steigerwald; Juan A. Sabate; Song Chi; Adam J. McCann; Li Zhang; Frank Mueller

    2012-09-01T23:59:59.000Z

    In this paper a DC-DC power converter for distributed photovoltaic plant architectures is presented. The proposed converter has the advantages of simplicity, high efficiency, and low cost. High efficiency is achieved by having a portion of the input PV power directly fed forward to the output without being processed by the converter. The operation of this converter also allows for a simplified maximum power point tracker design using fewer measurements

  9. Energy dispatch schedule optimization and cost benefit analysis for grid-connected, photovoltaic-battery storage systems

    E-Print Network [OSTI]

    Nottrott, A.; Kleissl, J.; Washom, B.

    2013-01-01T23:59:59.000Z

    photovoltaic-battery storage system (PV+ system). The LPrate). Eq. 1 minimizes net PV+ battery system power output (photovoltaic-battery storage system (PV+ system). The

  10. MHK Projects/Evopod E35 35kW grid connected demonstrator | Open Energy

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere I Geothermal Pwer Plant Jump to:LandownersLuther, Oklahoma: EnergyMARECInformation kW grid connected

  11. Evolutionary algorithms for the design of grid-connected PV-systems Daniel Gmez-Lorente a,

    E-Print Network [OSTI]

    Granada, Universidad de

    Section, ETSICCP, University of Granada, Campus Fuentenueva, Granada 18071, Spain b Dept. of Computer Technology), University of Granada, 18071 Granada, Spain c Dept. of Computer Arquitecture and Electronics, CITE III, University of Almería, La Cañada de San Urbano s/n, Almería 04120, Spain a r t i c l e i n f

  12. Smart Energy Management and Control for Fuel Cell Based Micro-Grid Connected Neighborhoods

    SciTech Connect (OSTI)

    Dr. Mohammad S. Alam

    2006-03-15T23:59:59.000Z

    Fuel cell power generation promises to be an efficient, pollution-free, reliable power source in both large scale and small scale, remote applications. DOE formed the Solid State Energy Conversion Alliance with the intention of breaking one of the last barriers remaining for cost effective fuel cell power generation. The Alliance’s goal is to produce a core solid-state fuel cell module at a cost of no more than $400 per kilowatt and ready for commercial application by 2010. With their inherently high, 60-70% conversion efficiencies, significantly reduced carbon dioxide emissions, and negligible emissions of other pollutants, fuel cells will be the obvious choice for a broad variety of commercial and residential applications when their cost effectiveness is improved. In a research program funded by the Department of Energy, the research team has been investigating smart fuel cell-operated residential micro-grid communities. This research has focused on using smart control systems in conjunction with fuel cell power plants, with the goal to reduce energy consumption, reduce demand peaks and still meet the energy requirements of any household in a micro-grid community environment. In Phases I and II, a SEMaC was developed and extended to a micro-grid community. In addition, an optimal configuration was determined for a single fuel cell power plant supplying power to a ten-home micro-grid community. In Phase III, the plan is to expand this work to fuel cell based micro-grid connected neighborhoods (mini-grid). The economic implications of hydrogen cogeneration will be investigated. These efforts are consistent with DOE’s mission to decentralize domestic electric power generation and to accelerate the onset of the hydrogen economy. A major challenge facing the routine implementation and use of a fuel cell based mini-grid is the varying electrical demand of the individual micro-grids, and, therefore, analyzing these issues is vital. Efforts are needed to determine the most appropriate means of implementing micro-grids and the costs and processes involved with their extended operation. With the development and availability of fuel cell based stand-alone power plants, an electrical mini-grid, encompassing several connected residential neighborhoods, has become a viable concept. A primary objective of this project is to define the parameters of an economically efficient fuel cell based mini-grid. Since pure hydrogen is not economically available in sufficient quantities at the present time, the use of reforming technology to produce and store excess hydrogen will also be investigated. From a broader perspective, the factors that bear upon the feasibility of fuel cell based micro-grid connected neighborhoods are similar to those pertaining to the electrification of a small town with a localized power generating station containing several conventional generating units. In the conventional case, the town or locality would also be connected to the larger grid system of the utility company. Therefore, in the case of the fuel cell based micro-grid connected neighborhoods, this option should also be available. The objectives of this research project are: To demonstrate that smart energy management of a fuel cell based micro-grid connected neighborhood can be efficient and cost-effective;To define the most economical micro-grid configuration; and, To determine how residential micro-grid connected fuel cell(s) can contribute to America's hydrogen energy future.

  13. The Impact of Rate Design and Net Metering on the Bill Savings from Distributed PV for Residential Customers in California

    SciTech Connect (OSTI)

    Energy and Resources Group, University of California, Berkeley; Darghouth, Naim R.; Barbose, Galen; Wiser, Ryan

    2011-06-01T23:59:59.000Z

    Net metering has become a widespread mechanism in the U.S. for supporting customer adoption of distributed photovoltaics (PV), but has faced challenges as PV installations grow to a larger share of generation in a number of states. This paper examines the value of the bill savings that customers receive under net metering, and the associated role of retail rate design, based on a sample of approximately two hundred residential customers of California's two largest electric utilities. We find that the bill savings per kWh of PV electricity generated varies by more than a factor of four across the customers in the sample, which is largely attributable to the inclining block structure of the utilities' residential retail rates. We also compare the bill savings under net metering to that received under three potential alternative compensation mechanisms, based on California's Market Price Referent (MPR). We find that net metering provides significantly greater bill savings than a full MPR-based feed-in tariff, but only modestly greater savings than alternative mechanisms under which hourly or monthly net excess generation is compensated at the MPR rate.

  14. Analyzing and simulating the variability of solar irradiance and solar PV powerplants

    E-Print Network [OSTI]

    Lave, Matthew S.

    2012-01-01T23:59:59.000Z

    Analysis of Distributed PV, American Solar Energy Society,Simulating the Reduction in PV Powerplant Variability due to8] T. Hoff, R. Perez, Modeling PV Fleet Output Variability,

  15. Agenda for Public Meeting on the Physical Characterization of Grid-Connected Commercial and Residential Buildings End-Use Equipment and Appliances

    Broader source: Energy.gov [DOE]

    Download the agenda below for the July 11 Public Meeting on the Physical Characterization of Grid-Connected Commercial and  Residential Buildings End-Use Equipment and Appliances.

  16. Utility Scale Wind Turbines on a Grid Connected Island Mohit Dua, Anthony L. Rogers, James F. Manwell,

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Utility Scale Wind Turbines on a Grid Connected Island Mohit Dua, Anthony L. Rogers, James F utility scale wind turbines on Fox Islands, located 12 miles from the coast of Maine in the United States of electricity itself. Three locations are analyzed in detail as potential sites for wind turbine installations

  17. Effect of component failures on economics of distributed photovoltaic systems

    SciTech Connect (OSTI)

    Lubin, B

    2012-02-02T23:59:59.000Z

    This report describes an applied research program to assess the realistic costs of grid connected photovoltaic (PV) installations. A Board of Advisors was assembled that included management from the regional electric power utilities, as well as other participants from companies that work in the electric power industry. Although the program started with the intention of addressing effective load carrying capacity (ELCC) for utility-owned photovoltaic installations, results from the literature study and recommendations from the Board of Advisors led investigators to the conclusion that obtaining effective data for this analysis would be difficult, if not impossible. The effort was then re-focused on assessing the realistic costs and economic valuations of grid-connected PV installations. The 17 kW PV installation on the University of Hartford's Lincoln Theater was used as one source of actual data. The change in objective required a more technically oriented group. The re-organized working group (changes made due to the need for more technically oriented participants) made site visits to medium-sized PV installations in Connecticut with the objective of developing sources of operating histories. An extensive literature review helped to focus efforts in several technical and economic subjects. The objective of determining the consequences of component failures on both generation and economic returns required three analyses. The first was a Monte-Carlo-based simulation model for failure occurrences and the resulting downtime. Published failure data, though limited, was used to verify the results. A second model was developed to predict the reduction in or loss of electrical generation related to the downtime due to these failures. Finally, a comprehensive economic analysis, including these failures, was developed to determine realistic net present values of installed PV arrays. Two types of societal benefits were explored, with quantitative valuations developed for both. Some societal benefits associated with financial benefits to the utility of having a distributed generation capacity that is not fossil-fuel based have been included into the economic models. Also included and quantified in the models are several benefits to society more generally: job creation and some estimates of benefits from avoiding greenhouse emissions. PV system failures result in a lowering of the economic values of a grid-connected system, but this turned out to be a surprisingly small effect on the overall economics. The most significant benefit noted resulted from including the societal benefits accrued to the utility. This provided a marked increase in the valuations of the array and made the overall value proposition a financially attractive one, in that net present values exceeded installation costs. These results indicate that the Department of Energy and state regulatory bodies should consider focusing on societal benefits that create economic value for the utility, confirm these quantitative values, and work to have them accepted by the utilities and reflected in the rate structures for power obtained from grid-connected arrays. Understanding and applying the economic benefits evident in this work can significantly improve the business case for grid-connected PV installations. This work also indicates that the societal benefits to the population are real and defensible, but not nearly as easy to justify in a business case as are the benefits that accrue directly to the utility.

  18. Optimal Control of a Grid-Connected Hybrid Electrical Energy Storage System for Homes

    E-Print Network [OSTI]

    Pedram, Massoud

    . There are several ways to perform such a demand side management [3]. In this paper, we focus on integrating PV power companies can employ dynamic electricity pricing strategies incentivizing consumers to perform demand side management by adjusting their power demand from the Grid to match the power generation capacity of the Grid

  19. Aalborg Universitet Frequency Adaptive Selective Harmonic Control for Grid-Connected Inverters

    E-Print Network [OSTI]

    Berning, Torsten

    by an increase of renewable energy systems, e.g. Photo- Voltaic (PV) systems and wind turbine systems, as well as the power electronics interfaced loads [1]­[4]. The energy conver- sion is typically performed by power 7, 2014; revised July 7, 2014; accepted July 26, 2014. Recommended for publication by Associate

  20. 2014-04-30 Public Meeting Agenda: Physical Characterization of Smart and Grid-Connected Commercial and Residential Buildings End-Use Equipment and Appliances

    Broader source: Energy.gov [DOE]

    This document is the agenda for the Physical Characterization of Smart and Grid-Connected Commercial and Residential Buildings End-Use Equipment and Appliances public meeting being held on April 30, 2014.

  1. 2014-04-30 Public Meeting Presentation Slides: Physical Characterization of Smart and Grid-Connected Commercial and Residential Buildings End-Use Equipment and Appliances

    Broader source: Energy.gov [DOE]

    These documents contain slide decks presented at the Physical Characterization of Smart and Grid-Connected Commercial and Residential Buildings End-Use Equipment and Appliances public meeting held on April 30, 2014.

  2. Policy Building Blocks: Helping Policymakers Determine Policy Staging for the Development of Distributed PV Markets: Preprint

    SciTech Connect (OSTI)

    Doris, E.

    2012-04-01T23:59:59.000Z

    There is a growing body of qualitative and a limited body of quantitative literature supporting the common assertion that policy drives development of clean energy resources. Recent work in this area indicates that the impact of policy depends on policy type, length of time in place, and economic and social contexts of implementation. This work aims to inform policymakers about the impact of different policy types and to assist in the staging of those policies to maximize individual policy effectiveness and development of the market. To do so, this paper provides a framework for policy development to support the market for distributed photovoltaic systems. Next steps include mathematical validation of the framework and development of specific policy pathways given state economic and resource contexts.

  3. Development of a Dispatchable PV Peak Shainv System. PV: Bonus Program - Phase 1 Report. Volume 1

    SciTech Connect (OSTI)

    None

    1995-10-01T23:59:59.000Z

    This report summarizes the work performed by Delmarva Power and Light and its subcontractors in Phase 1 of the US Department of Energy's PV:BONUS Program. The purpose of the program is to develop products and systems for buildings which utilize photovoltaic (N) technology. Beginning with a cooperative research effort with the University of Delaware's Center for Energy and Environmental Policy Research Delmarva Power developed and demonstrated the concept of Dispatchable PV Peak Shaving. This concept and the system which resulted horn the development work are unique from other grid-connected PV systems because it combines a PV, battery energy storage, power conversion and control technologies into an integrated package. Phase 1 began in July 1993 with the installation of a test and demonstration system at Delmarva's Northern Division General Office building near Newark, Delaware. Following initial testing throughout the summer and fall of 1993, significant modifications were made under an amendment to the DOE contract. Work on Phase 1 concluded in the early spring of 1995. Significant progress towards the goal of commercializing the system was made during Phase 1, and is summarized. Based on progress in Phase 1, a proposal to continue the work in Phase 2 was submitted to the US DOE in May 1995. A contract amendment and providing funds for the Phase 2 work is expected in July 1995.

  4. Optimal Inverter VAR Control in Distribution Systems with High PV Penetration

    E-Print Network [OSTI]

    Farivar, Masoud; Clarke, Christopher; Low, Steven

    2011-01-01T23:59:59.000Z

    The intent of the study detailed in this paper is to demonstrate the benefits of inverter var control on a fast timescale to mitigate rapid and large voltage fluctuations due to the high penetration of photovoltaic generation and the resulting reverse power flow. Our approach is to formulate the volt/var control as a radial optimal power flow (OPF) problem to minimize line losses and energy consumption, subject to constraints on voltage magnitudes. An efficient solution to the radial OPF problem is presented and used to study the structure of optimal inverter var injection and the net benefits, taking into account the additional cost of inverter losses when operating at non-unity power factor. This paper will illustrate how, depending on the circuit topology and its loading condition, the inverter's optimal reactive power injection is not necessarily monotone with respect to their real power output. The results are demonstrated on a distribution feeder on the Southern California Edison system that has a very ...

  5. Sandia National Laboratories: PV-Tech magazine

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Solar Newsletter, SunShot, Systems Analysis Sandia researcher Joshua Stein (in Sandia's Photovoltaic & Distributed Systems Integration Dept.) highlighted novel PV array...

  6. Sandia National Laboratories: PV array monitoring strategies

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Solar Newsletter, SunShot, Systems Analysis Sandia researcher Joshua Stein (in Sandia's Photovoltaic & Distributed Systems Integration Dept.) highlighted novel PV array...

  7. Sandia National Laboratories: increase PV deployment

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    PV deployment ECIS-Princeton Power Systems, Inc.: Demand Response Inverter On March 19, 2013, in DETL, Distribution Grid Integration, Energy, Energy Surety, Facilities, Grid...

  8. Energy dispatch schedule optimization and cost benefit analysis for grid-connected, photovoltaic-battery storage systems

    E-Print Network [OSTI]

    Nottrott, A.; Kleissl, J.; Washom, B.

    2013-01-01T23:59:59.000Z

    photovoltaic systems with battery storages control based onconnected, photovoltaic-battery storage systems A. Nottrott,combined photovoltaic-battery storage system (PV+ system).

  9. Supported PV module assembly

    DOE Patents [OSTI]

    Mascolo, Gianluigi; Taggart, David F.; Botkin, Jonathan D.; Edgett, Christopher S.

    2013-10-15T23:59:59.000Z

    A supported PV assembly may include a PV module comprising a PV panel and PV module supports including module supports having a support surface supporting the module, a module registration member engaging the PV module to properly position the PV module on the module support, and a mounting element. In some embodiments the PV module registration members engage only the external surfaces of the PV modules at the corners. In some embodiments the assembly includes a wind deflector with ballast secured to a least one of the PV module supports and the wind deflector. An array of the assemblies can be secured to one another at their corners to prevent horizontal separation of the adjacent corners while permitting the PV modules to flex relative to one another so to permit the array of PV modules to follow a contour of the support surface.

  10. Sensitivity analysis for optimal sizing of a PV grid connected home G.WARKOZEK S.PLOIX* M.JACOMINO* F.WURTZ

    E-Print Network [OSTI]

    Boyer, Edmond

    : solver Xg Xs XbPpv PLoad GridBatteryPhotovoltaic panel solver Xg Xs XbPpv PLoad GridBatteryPhotovoltaic, published in "European Energy Conference 2010, Barcelone : Spain (2010)" #12;temperature, possible

  11. Distributed Solar PV for Electricity System Resiliency: Policy and Regulatory Considerations (Brochure), NREL (National Renewable Energy Laboratory)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville Power AdministrationField Campaign:INEA : Papers SubfoldersU.S.PV FOR ELECTRICITY SYSTEM

  12. INTEGRATION OF PV IN DEMAND RESPONSE

    E-Print Network [OSTI]

    Perez, Richard R.

    . It may also be implemented by means of customer-sited emergency power generation (e.g., diesel generators the case that distributed PV generation deserves a substantial portion of the credit allotted to demand response programs. This is because PV generation acts as a catalyst to demand response, markedly enhancing

  13. Sandia Energy - PV Publications

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa del Sol Home Distribution Grid IntegrationOffshore Wind RD&D:PV

  14. Exploring the Economic Value of EPAct 2005's PV Tax Credits

    SciTech Connect (OSTI)

    Bolinger, Mark A; Wiser, Ryan; Ing, Edwin

    2009-08-01T23:59:59.000Z

    This CESA - LBNL Case Study examines how much economic value do new and expanded federal tax credits really provide to PV system purchasers, and what implications might they hold for state/utility PV grant programs. The report begins with a discussion of the taxability of PV grants and their interaction with federal credits, as this issue significantly affects the analysis that follows. We then calculate the incremental value of EPAct's new and expanded credits for PV systems of different sizes, and owned by different types of entities. The report concludes with a discussion of potential implications for purchasers of PV systems, as well as for administrators of state/utility PV programs. The market for grid-connected photovoltaics (PV) in the US has grown dramatically in recent years, driven in large part by PV grant or 'buy-down' programs in California, New Jersey, and many other states. The recent announcement of a new 11-year, $3.2 billion PV program in California suggests that state policy will continue to drive even faster growth over the next decade. Federal policy has also played a role, primarily by providing commercial PV systems access to tax benefits, including accelerated depreciation (5-year MACRS schedule) and a business energy investment tax credit (ITC). Since the signing of the Energy Policy Act of 2005 (EPAct) on August 8, the federal government has begun to play a much more significant role in supporting both commercial and residential PV systems. Specifically, EPAct increased the federal ITC for commercial PV systems from 10% to 30% of system costs, and also created a new 30% ITC (capped at $2000) for residential solar systems. Both changes went into effect on January 1, 2006, for an initial period of two years, and in late 2006 were extended for an additional year. Unless extended further, the new residential ITC will expire, and the 30% commercial ITC will revert back to 10%, on January 1, 2009. How much economic value do these new and expanded federal tax credits really provide to PV system purchasers? And what implications might they hold for state/utility PV grant programs? Using a generic (i.e., non-state-specific) cash flow model, this report explores these questions.1 We begin with a discussion of the taxability of PV grants and their interaction with federal credits, as this issue significantly affects the analysis that follows. We then calculate the incremental value of EPAct's new and expanded credits for PV systems of different sizes, and owned by different types of entities. We conclude with a discussion of potential implications for purchasers of PV systems, as well as for administrators of state/utility PV programs.

  15. Sandia National Laboratories: PV Value®

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    and PV industry sales staff. For appraisers, the inputs specific to PV in the Residential Green and Energy Efficient Addendum can be used as inputs to PV Value. Valuing a PV...

  16. Energy 101: Solar PV

    SciTech Connect (OSTI)

    None

    2011-01-01T23:59:59.000Z

    Solar photovoltaic (PV) systems can generate clean, cost-effective power anywhere the sun shines. This video shows how a PV panel converts the energy of the sun into renewable electricity to power homes and businesses.

  17. Energy 101: Solar PV

    ScienceCinema (OSTI)

    None

    2013-05-29T23:59:59.000Z

    Solar photovoltaic (PV) systems can generate clean, cost-effective power anywhere the sun shines. This video shows how a PV panel converts the energy of the sun into renewable electricity to power homes and businesses.

  18. April 30 Public Meeting: Physical Characterization of Smart and Grid-Connected Commercial and Residential Building End-Use Equipment and Appliances

    Broader source: Energy.gov [DOE]

    These documents contain slide decks presented at the Physical Characterization of Smart and Grid-Connected Commercial and Residential Buildings End-Use Equipment and Appliances public meeting held on April 30, 2014. The first document includes the first presentation from the meeting: DOE Vision and Objectives. The second document includes all other presentations from the meeting: Terminology and Definitions; End-User and Grid Services; Physical Characterization Framework; Value, Benefits & Metrics.

  19. Single-Phase Cascaded H-Bridge Multilevel Inverter with Nonactive Power Compensation

    E-Print Network [OSTI]

    Tolbert, Leon M.

    presents a single-phase cascaded H- bridge multilevel inverter for a grid-connected photovoltaic (PV research areas. Photovoltaic (PV) systems are ideally distributed generation (DG) units, and they offer this topology in grid-connected PV applications [1-3]. The multilevel inverter also presents the advantages

  20. PV Validation and Bankability Workshop

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

    Venture Capitalists, Manufacturers, System Integrators, Consumers * What: PV Cells, PVCPV modules, inverters, balance of system hardware, PV system, installation * What:...

  1. Sandia Energy - Sandia Will Host PV Bankability Workshop at Solar...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Will Host PV Bankability Workshop at Solar Power International (SPI) 2013 Home Renewable Energy Energy Facilities Grid Integration Partnership News Distribution Grid Integration...

  2. Stabilized PV system

    DOE Patents [OSTI]

    Dinwoodie, Thomas L. (Piedmont, CA)

    2002-12-17T23:59:59.000Z

    A stabilized PV system comprises an array of photovoltaic (PV) assemblies mounted to a support surface. Each PV assembly comprises a PV module and a support assembly securing the PV module to a position overlying the support surface. The array of modules is circumscribed by a continuous, belt-like perimeter assembly. Cross strapping, extending above, below or through the array, or some combination of above, below and through the array, secures a first position along the perimeter assembly to at least a second position along the perimeter assembly thereby stabilizing the array against wind uplift forces. The first and second positions may be on opposite sides on the array.

  3. Multiple Jets as PV Staircases: The Phillips Effect and the Resilience of Eddy-Transport Barriers

    E-Print Network [OSTI]

    Cambridge, University of

    Multiple Jets as PV Staircases: The Phillips Effect and the Resilience of Eddy-Transport Barriers D 2007) ABSTRACT A review is given that focuses on why the sideways mixing of potential vorticity (PV. PV mixing often produces a sideways layering or banding of the PV distribution and therefore

  4. Fire resistant PV shingle assembly

    DOE Patents [OSTI]

    Lenox, Carl J.

    2012-10-02T23:59:59.000Z

    A fire resistant PV shingle assembly includes a PV assembly, including PV body, a fire shield and a connection member connecting the fire shield below the PV body, and a support and inter-engagement assembly. The support and inter-engagement assembly is mounted to the PV assembly and comprises a vertical support element, supporting the PV assembly above a support surface, an upper interlock element, positioned towards the upper PV edge, and a lower interlock element, positioned towards the lower PV edge. The upper interlock element of one PV shingle assembly is inter-engageable with the lower interlock element of an adjacent PV shingle assembly. In some embodiments the PV shingle assembly may comprise a ventilation path below the PV body. The PV body may be slidably mounted to the connection member to facilitate removal of the PV body.

  5. The Impact of Retail Rate Structures on the Economics ofCustomer-Sited PV: A Study of Commercial Installations inCalifornia

    SciTech Connect (OSTI)

    Wiser, Ryan; Mills, Andrew; Barbose, Galen; Golove, William

    2007-06-01T23:59:59.000Z

    We analyze the impact of retail rate design on the economics of grid-connected commercial photovoltaic (PV) systems in California. The analysis is based on 15-minute interval building load and PV production data for 24 commercial PV installations in California, spanning a diverse set of building load shapes and geographic locations. We derive the annual bill savings per kWh generated for each PV system, under each of 21 distinct retail rates currently offered by the five largest utilities in California. We identify and explain variation in the value of bill savings attributable to differences in the structure of demand and energy charges across rates, as well as variation attributable to other factors, such as the size of the PV system relative to building load, the specific shape of the PV production profile, and the customer load profile. We also identify the optimal rate for each customer, among those rates offered as alternatives to one another, and show how the decision is driven in large measure by the size of the PV system relative to building load. The findings reported here may be of value to regulators and utilities responsible for designing retail rates, as well as to customers and PV retailers who have a need to estimate the prospective bill savings of PV systems.

  6. Sandia National Laboratories: PV

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Operations and Maintenance Reporting, ... PV Contacts On April 20, 2011, in Photovoltaic and Grid Integration Manager Charles Hanley 505.844.4435 cjhanle at...

  7. Sandia National Laboratories: PV

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    improve photovoltaic (PV) materials efficiency and help make solar electricity cost-competitive with other energy sources. The work builds on Sandia's recent successes...

  8. Updating Technical Screens for PV Interconnection: Preprint

    SciTech Connect (OSTI)

    Coddington, M.; Ellis, A.; Lynn, K.; Razon, A.; Key, T.; Kroposki, B.; Mather, B.; Hill, R.; Nicole, K.; Smith, J.

    2012-08-01T23:59:59.000Z

    Solar photovoltaics (PV) is the dominant type of distributed generation (DG) technology interconnected to electric distribution systems in the United States, and deployment of PV systems continues to increase rapidly. Considering the rapid growth and widespread deployment of PV systems in United States electric distribution grids, it is important that interconnection procedures be as streamlined as possible to avoid unnecessary interconnection studies, costs, and delays. Because many PV interconnection applications involve high penetration scenarios, the process needs to allow for a sufficiently rigorous technical evaluation to identify and address possible system impacts. Existing interconnection procedures are designed to balance the need for efficiency and technical rigor for all DG. However, there is an implicit expectation that those procedures will be updated over time in order to remain relevant with respect to evolving standards, technology, and practical experience. Modifications to interconnection screens and procedures must focus on maintaining or improving safety and reliability, as well as accurately allocating costs and improving expediency of the interconnection process. This paper evaluates the origins and usefulness of the capacity penetration screen, offers potential short-term solutions which could effectively allow fast-track interconnection to many PV system applications, and considers longer-term solutions for increasing PV deployment levels in a safe and reliable manner while reducing or eliminating the emphasis on the penetration screen.

  9. A control system for improved battery utilization in a PV-powered peak-shaving system

    SciTech Connect (OSTI)

    Palomino, E [Salt River Project, Phoenix, AZ (United States); Stevens, J. [Sandia National Labs., Albuquerque, NM (United States); Wiles, J. [New Mexico State Univ., Las Cruces, NM (United States). Southwest Technology Development Inst.

    1996-08-01T23:59:59.000Z

    Photovoltaic (PV) power systems offer the prospect of allowing a utility company to meet part of the daily peak system load using a renewable resource. Unfortunately, some utilities have peak system- load periods that do not match the peak production hours of a PV system. Adding a battery energy storage system to a grid-connected PV power system will allow dispatching the stored solar energy to the grid at the desired times. Batteries, however, pose system limitations in terms of energy efficiency, maintenance, and cycle life. A new control system has been developed, based on available PV equipment and a data acquisition system, that seeks to minimize the limitations imposed by the battery system while maximizing the use of PV energy. Maintenance requirements for the flooded batteries are reduced, cycle life is maximized, and the battery is operated over an efficient range of states of charge. This paper presents design details and initial performance results on one of the first installed control systems of this type.

  10. PV PLANNER A DESIGN AND

    E-Print Network [OSTI]

    Delaware, University of

    PV PLANNER A DESIGN AND ANALYSIS TOOL FOR BUILDING INTEGRATED SOLAR ELECTRIC SYSTEMS FINAL Center for Energy and Environmental Policy University of Delaware December 2006 #12;#12;PV...............................................................................................................................1 1.2 PV Planner: An Overview

  11. Sandia National Laboratories: PV evaluation

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    evaluation PV Plant Performance Technical Briefing Published in PV Power Tech On March 4, 2015, in Computational Modeling & Simulation, Energy, Facilities, News, News & Events,...

  12. Overview of PV balance-of-systems technology: Experience and guidelines for utility ties in the United States of America

    SciTech Connect (OSTI)

    Bower, W. [Sandia National Labs., Albuquerque, NM (United States); Whitaker, C. [Endecon Engineering, San Ramon, CA (United States)

    1997-10-01T23:59:59.000Z

    The U.S. National Photovoltaic Program began in 1975 by supporting the development of terrestrial PV modules and hardware associated with grid-connected PV systems. Early PV-system demonstration programs were also supported and cost shared by the U.S. Department of Energy (DOE). A wide variety of PV systems were deployed, usually with utility participation. The early demonstration projects provided, and continue to provide, valuable PV system experience to utilities, designers and suppliers. As a result of experience gained, several important milestones in codes and standards pertaining to the design, installation and operation of photovoltaic (PV) systems have been completed. These code and standard activities were conducted through collaboration of participants from all sectors of the PV industry, utilities and the US DOE National Photovoltaic Program. Codes and standards that have been proposed, written, or modified include changes and additions for the 1999 National Electric Code{reg_sign} (NEC{reg_sign}), standards for fire and personnel safety, system testing, field acceptance, component qualification, and utility interconnection. Project authorization requests with the Institute of Electrical and Electronic Engineers (IEEE) have resulted in standards for component qualification and were further adapted for standards used to list PV modules and balance-of-system components. Industry collaboration with Underwriter Laboratories, Inc., with the American Society for Testing and Materials, and through critical input and review for international standards with the International Electrotechnical Commission have resulted in new and revised domestic and international standards for PV applications. Activities related to work on codes and standards through the International Energy Agency are also being supported by the PV industry and the US DOE. The paper shows relationships between activities in standards writing.

  13. Interline Photovoltaic (I-PV) power system - A novel concept of power flow control and management

    E-Print Network [OSTI]

    Khadkikar, Vinod

    This paper presents a new system configuration for a large-scale Photovoltaic (PV) power system with multi-line transmission/distribution networks. A PV power plant is reconfigured in a way that two adjacent power system ...

  14. Approaches To Integrating A HIgh Penertration Of Solar PV and CPV Onto The Electrical Grid

    E-Print Network [OSTI]

    Hill, Steven Craig

    2013-01-01T23:59:59.000Z

    solar PV and distributed generation. UTILITY RATE DESIGN ANDutility concerns that a high penetration of inverter-based solar energy systems along with other distributed generation

  15. Exploring the Economic Value of EPAct 2005's PV Tax Credits

    SciTech Connect (OSTI)

    Bolinger, Mark; Wiser, Ryan; Ing, Edwin

    2006-03-28T23:59:59.000Z

    The market for grid-connected photovoltaics (PV) in the US has grown dramatically in recent years, driven in large part by PV grant or ''buy-down'' programs in California, New Jersey, and many other states. The recent announcement of a new 11-year, $3.2 billion PV program in California suggests that state policy will continue to drive even faster growth over the next decade. Federal policy has also played a role, primarily by providing commercial PV systems access to tax benefits, including accelerated depreciation (5-year MACRS schedule) and a business energy investment tax credit (ITC). With the signing of the Energy Policy Act of 2005 (EPAct) on August 8, the federal government is poised to play a much more significant future role in supporting both commercial and residential PV systems. Specifically, EPAct increased the federal ITC for commercial PV systems from 10% to 30% of system costs, and also created a new 30% ITC (capped at $2000) for residential solar systems. Both changes went into effect on January 1, 2006, and--absent an extension (for which the solar industry has already begun lobbying)--will last for a period of two years: the new residential ITC will expire, and the 30% commercial ITC will revert back to 10%, on January 1, 2008. How much economic value do these new and expanded federal tax credits really provide to PV system purchasers? And what implications might they hold for state/utility PV grant programs? Using a generic (i.e., non-state-specific) cash flow model, this report explores these questions. We begin with a discussion of the taxability of PV grants and their interaction with federal credits, as this issue significantly affects the analysis that follows. We then calculate the incremental value of EPAct's new and expanded credits for PV systems of different sizes, and owned by different types of entities. We conclude with a discussion of potential implications for purchasers of PV systems, as well as for administrators of state/utility PV programs.

  16. Technical Potential for Local Distributed

    E-Print Network [OSTI]

    the impact of high penetrations of solar PV on wholesale power markets (energy and capacity), since large amounts of distributed solar PV could decrease wholesale power prices

  17. Research of PV Application on

    E-Print Network [OSTI]

    Netoff, Theoden

    Research of PV Application on UMore Park Community Design Arch 8563:Getting Blow the Surface Xiaoyu Liu #12;Getting Blow Surface: PV opportunity on the UMore Park 2 Research of PV application on U More community on the aspect of PV application. There are four parts in this report: (1) Introduction of UMore

  18. Sandia National Laboratories: PV

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Model On October 10, 2011, in This Web Demo model is a simplified "player" version of the Photovoltaic Reliability Performance Model (PV-RPM) currently in development at Sandia...

  19. Integrating High Penetrations of PV into Southern California: Year 2 Project Update; Preprint

    SciTech Connect (OSTI)

    Mather, B.; Neal, R.

    2012-08-01T23:59:59.000Z

    Southern California Edison (SCE) is well into a five-year project to install a total of 500 MW of distributed photovoltaic (PV) energy within its utility service territory. Typical installations to date are 1-3 MW peak rooftop PV systems that interconnect to medium-voltage urban distribution circuits or larger (5 MW peak) ground-mounted systems that connect to medium-voltage rural distribution circuits. Some of the PV system interconnections have resulted in distribution circuits that have a significant amount of PV generation compared to customer load, resulting in high-penetration PV integration scenarios. The National Renewable Energy Laboratory (NREL) and SCE have assembled a team of distribution modeling, resource assessment, and PV inverter technology experts in order to investigate a few of the high-penetration PV distribution circuits. Currently, the distribution circuits being studied include an urban circuit with a PV penetration of approximately 46% and a rural circuit with a PV penetration of approximately 60%. In both cases, power flow on the circuit reverses direction, compared to traditional circuit operation, during periods of high PV power production and low circuit loading. Research efforts during year two of the five-year project were focused on modeling the distribution system level impacts of high-penetration PV integrations, the development and installation of distribution circuit data acquisition equipment appropriate for quantifying the impacts of high-penetration PV integrations, and investigating high-penetration PV impact mitigation strategies. This paper outlines these research efforts and discusses the following activities in more detail: the development of a quasi-static time-series test feeder for evaluating high-penetration PV integration modeling tools; the advanced inverter functions being investigated for deployment in the project's field demonstration and a power hardware-in-loop test of a 500-kW PV inverter implementing a limited set of advanced inverter functions.

  20. Sandia Energy - PV Program Disclaimer

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa del Sol Home Distribution Grid IntegrationOffshore Wind RD&D:PV ModelingProgram

  1. Dynamic Model Validation of PV Inverters Under Short-Circuit Conditions: Preprint

    SciTech Connect (OSTI)

    Muljadi, E.; Singh, M.; Bravo, R.; Gevorgian, V.

    2013-03-01T23:59:59.000Z

    Photovoltaic (PV) modules have dramatically decreased in price in the past few years, spurring the expansion of photovoltaic deployment. Residential and commercial rooftop installations are connected to the distribution network; large-scale installation PV power plants (PVPs) have benefited from tax incentives and the low cost of PV modules. As the level penetration of PV generation increases, the impact on power system reliability will also be greater. Utility power system planners must consider the role of PV generation in power systems more realistically by representing PV generation in dynamic stability analyses. Dynamic models of PV inverters have been developed in the positive sequence representation. NREL has developed a PV inverter dynamic model in PSCAD/EMTDC. This paper validates the dynamic model with an actual hardware bench test conducted by Southern California Edison's Distributed Energy Resources laboratory. All the fault combinations -- symmetrical and unsymmetrical -- were performed in the laboratory. We compare the simulation results with the bench test results.

  2. RETI Phase 1B Final Report Update NET SHORT RECALCULATION AND NEW PV ASSUMPTIONS

    E-Print Network [OSTI]

    RETI Phase 1B Final Report Update NET SHORT RECALCULATION AND NEW PV ASSUMPTIONS With Revisions distributed photovoltaic (PV) installations in the Report is unclear and perhaps misleading. At the direction-generation is required. The CEC forecast assumed that 1,082 GWh will be self-generated by consumers from new PV

  3. Large-Scale PV Integration Study

    SciTech Connect (OSTI)

    Lu, Shuai; Etingov, Pavel V.; Diao, Ruisheng; Ma, Jian; Samaan, Nader A.; Makarov, Yuri V.; Guo, Xinxin; Hafen, Ryan P.; Jin, Chunlian; Kirkham, Harold; Shlatz, Eugene; Frantzis, Lisa; McClive, Timothy; Karlson, Gregory; Acharya, Dhruv; Ellis, Abraham; Stein, Joshua; Hansen, Clifford; Chadliev, Vladimir; Smart, Michael; Salgo, Richard; Sorensen, Rahn; Allen, Barbara; Idelchik, Boris

    2011-07-29T23:59:59.000Z

    This research effort evaluates the impact of large-scale photovoltaic (PV) and distributed generation (DG) output on NV Energy’s electric grid system in southern Nevada. It analyzes the ability of NV Energy’s generation to accommodate increasing amounts of utility-scale PV and DG, and the resulting cost of integrating variable renewable resources. The study was jointly funded by the United States Department of Energy and NV Energy, and conducted by a project team comprised of industry experts and research scientists from Navigant Consulting Inc., Sandia National Laboratories, Pacific Northwest National Laboratory and NV Energy.

  4. Grid-Connected Inverter Anti-Islanding Test Results for General Electric Inverter-Based Interconnection Technology

    SciTech Connect (OSTI)

    Ye, Z.; Dame, M.; Kroposki, B.

    2005-01-01T23:59:59.000Z

    This report covers testing of General Electric-proposed anti-islanding schemes. The objectives were to: (1) Validate the effectiveness of the proposed anti-islanding schemes; (2) Conduct parametric evaluation of the schemes with respect to control settings and load conditions, including controller gains, load power levels, and load quality factors; and (3) Examine the ability of the distributed resource to ride through a low-voltage condition on the utility grid.

  5. Panel: Microgrid Research and Field Testing IEEE PES General Meeting, 24-28 June 2007, Tampa, FL 1 In general, a microgrid can operate in both the grid-connected

    E-Print Network [OSTI]

    Panel: Microgrid Research and Field Testing IEEE PES General Meeting, 24-28 June 2007, Tampa, FL 1 Abstract In general, a microgrid can operate in both the grid-connected mode and the islanded mode where the microgrid is interfaced to the main power system by a fast semiconductor switch called static switch, (SS

  6. This document is a preprint of the final paper: C. Zhang, T. Dragicevic, J. C. Vasquez, and J. M. Guerrero "Resonance damping techniques for grid-connected voltage source converters with

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

    of these methods. Keywords: LCL filter, Active damp methods, Passive damp methods Grid-connected inverter I advanced control strategies in order to maintain better stability performance [2]. So that many passive feedback" approach, these two strategies aim at modifying the transfer function of LCL filter in closed

  7. Open PV Project: Unlocking PV Installation Data (Brochure)

    SciTech Connect (OSTI)

    Not Available

    2012-04-01T23:59:59.000Z

    This brochure summarizes the Open PV Project, a collaborative effort of government, industry, and the public to compile a comprehensive database of PV installations in the United States. The brochure outlines the purpose and history of the project as well as the main capabilities and benefits of the online Open PV tool. The brochure also introduces how features of the tool are used, and it describes the sources and characteristics of Open PV's data and data collection processes.

  8. Energy 101: Solar PV | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    Solar PV Energy 101: Solar PV Addthis Description Solar photovoltaic (PV) systems can generate clean, cost-effective power anywhere the sun shines. This video shows how a PV panel...

  9. PV System Performance and Standards

    SciTech Connect (OSTI)

    Osterwald, C. R.

    2005-11-01T23:59:59.000Z

    This paper presents a brief overview of the status and accomplishments during fiscal year (FY) 2005 of the Photovoltaic (PV) System Performance and Standards Subtask, which is part of the PV Systems Engineering Project (a joint NREL-Sandia project).

  10. Sandia Energy - PV Systems Reliability

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Systems Reliability Home Stationary Power Energy Conversion Efficiency Solar Energy Photovoltaics PV Systems Reliability PV Systems ReliabilityCoryne Tasca2015-05-08T03:40:54+00:00...

  11. Transforming PV Installations toward Dispatchable, Schedulable...

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

    Transforming PV Installations toward Dispatchable, Schedulable Energy Solutions Transforming PV Installations toward Dispatchable, Schedulable Energy Solutions Advanced Energy...

  12. Solar PV and Glare Factsheet

    Broader source: Energy.gov [DOE]

    A common misconception about solar photovoltaic (PV) panels is that they inherently cause or create "too much" glare, posing a nuisance to neighbors and a safety risk for pilots. While solar PV systems can produce glare, light absorption - rather than reflection - is central to the function of solar PV panels. This fact sheet describes the basic issues surrounding glare from solar PV panels, the new Federal Aviation Administration guidance, and the implications for local governments.

  13. Comparison of a Recurrent Neural Network PV System Model with...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Modeled performance from the RNN were compared to measured performance data. The Sandia Photovoltaic Array Performance Model (SAPM) and Grid Connected Photovoltaic Inverter model...

  14. Testing for PV Reliability (Presentation)

    SciTech Connect (OSTI)

    Kurtz, S.; Bansal, S.

    2014-09-01T23:59:59.000Z

    The DOE SUNSHOT workshop is seeking input from the community about PV reliability and how the DOE might address gaps in understanding. This presentation describes the types of testing that are needed for PV reliability and introduces a discussion to identify gaps in our understanding of PV reliability testing.

  15. Considerations for PV Site Surveys

    E-Print Network [OSTI]

    Johnson, Eric E.

    array. #12;Conductor Routing & Inverter Location The location of the inverter in relation to the PV of the conductors between the PV array and the inverter, and between the inverter and the AC load centerConsiderations for PV Site Surveys John Wiles Sponsored by the U.S. Department of Energy this loss

  16. Kauai Island Utility Co-op (KIUC) PV integration study.

    SciTech Connect (OSTI)

    Ellis, Abraham; Mousseau, Tom (Knoxville, TN)

    2011-08-01T23:59:59.000Z

    This report investigates the effects that increased distributed photovoltaic (PV) generation would have on the Kauai Island Utility Co-op (KIUC) system operating requirements. The study focused on determining reserve requirements needed to mitigate the impact of PV variability on system frequency, and the impact on operating costs. Scenarios of 5-MW, 10-MW, and 15-MW nameplate capacity of PV generation plants distributed across the Kauai Island were considered in this study. The analysis required synthesis of the PV solar resource data and modeling of the KIUC system inertia. Based on the results, some findings and conclusions could be drawn, including that the selection of units identified as marginal resources that are used for load following will change; PV penetration will displace energy generated by existing conventional units, thus reducing overall fuel consumption; PV penetration at any deployment level is not likely to reduce system peak load; and increasing PV penetration has little effect on load-following reserves. The study was performed by EnerNex under contract from Sandia National Laboratories with cooperation from KIUC.

  17. Berkeley Program Offers New Option for Financing Residential PV Systems

    E-Print Network [OSTI]

    Bolinger, Mark A

    2009-01-01T23:59:59.000Z

    Vehicle for Residential PV Installations: Opportunities andfor Financing Residential PV Systems Mark Bolinger, Lawrencefor residential photovoltaic (PV) systems. Though financing

  18. Characterizing Shading Losses on Partially Shaded PV Systems (Presentation)

    SciTech Connect (OSTI)

    Deline, C.

    2010-09-23T23:59:59.000Z

    Presentation on shaded PV power loss, practical issues with modeling shaded PV, and methods of implementing partially shaded PV modeling.

  19. Full Steam Ahead for PV in US Homes?

    E-Print Network [OSTI]

    Bolinger, Mark A

    2009-01-01T23:59:59.000Z

    Full Steam Ahead for PV in US Homes? Mark Bolinger, Galenutility-scale photovoltaic (PV) installations in the yearsimplications for PV rebate program administrators, PV system

  20. Multi-level converters for three-phase photovoltaic applications

    E-Print Network [OSTI]

    Lehman, Brad

    of PV panels distributed in a matrix. The principle is similar to methods used in multi-level inverters. INTRODUCTION Fig. 1. Multi-level inverter for single-phase grid connected PV modules [1] Multi-level inverters-LEVEL INVERTER FOR SINGLE-PHASE GRID CONNECTED PV MODULES [1] Va S1 S2 S3 S4 S5 S6 Sa1 Sa2 Sa3 Sa4 Sa5 Sa6 V7

  1. PV Fact Sheets Argument B1Some people state that "The external costs of PV electricity

    E-Print Network [OSTI]

    PV Fact Sheets Argument B1Some people state that "The external costs of PV electricity is much and the low one to thin-film cadmium telluride PV systems. Fossil fuel power plants PV displaces. 5.8 External

  2. Sandia National Laboratories: PV Reliability

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Reliability Sandia Research on PV Arc-Fault Detection Submitted for US Patent On March 4, 2015, in Computational Modeling & Simulation, Energy, Facilities, News, News & Events,...

  3. Outdoor PV Degradation Comparison

    SciTech Connect (OSTI)

    Jordan, D. C.; Smith, R. M.; Osterwald, C. R.; Gelak, E.; Kurtz, S. R.

    2011-02-01T23:59:59.000Z

    As photovoltaic (PV) penetration of the power grid increases, it becomes vital to know how decreased power output; may affect cost over time. In order to predict power delivery, the decline or degradation rates must be determined; accurately. At the Performance and Energy Rating Testbed (PERT) at the Outdoor Test Facility (OTF) at the; National Renewable Energy Laboratory (NREL) more than 40 modules from more than 10 different manufacturers; were compared for their long-term outdoor stability. Because it can accommodate a large variety of modules in a; limited footprint the PERT system is ideally suited to compare modules side-by-side under the same conditions.

  4. 1464 IEEE TRANSACTIONS ON SMART GRID, VOL. 4, NO. 3, SEPTEMBER 2013 Distributed Optimal Power Flow

    E-Print Network [OSTI]

    Giannakis, Georgios

    --Distributed optimization, distribution feeders, microgrids, optimal power flow, semidefinite relaxation. I. INTRODUCTION MICROGRIDS are portions of a power distribution net- work located downstream of the distribution substation) and energy storage devices [1]. A microgrid can operate in either grid-connected, islanded, or hybrid modes

  5. 3-Port Single-Stage PV & Battery Converter Improves Efficiency and Cost in Combined PV/Battery Systems

    SciTech Connect (OSTI)

    Bundschuh, Paul [Ideal Power

    2013-03-23T23:59:59.000Z

    Due to impressive cost reductions in recent years, photovoltaic (PV) generation is now able to produce electricity at highly competitive prices, but PV’s inherent intermittency reduces the potential value of this energy. The integration of battery storage with PV will be transformational by increasing the value of solar. Utility scale systems will benefit by firming intermittency including PV ramp smoothing, grid support and load shifting, allowing PV to compete directly with conventional generation. For distributed grid-tied PV adding storage will reduce peak demand utility charges, as well as providing backup power during power grid failures. The largest long term impact of combined PV and battery systems may be for delivering reliable off-grid power to the billions of individuals globally without access to conventional power grids, or for billions more that suffer from daily power outages. PV module costs no longer dominate installed PV system costs. Balance-of-System (BOS) costs including the PV inverter and installation now contribute the majority of installed system costs. Battery costs are also dropping faster than installation and battery power converter systems. In each of these separate systems power converters have become a bottleneck for efficiency, cost and reliability. These bottlenecks are compounded in hybrid power conversion systems that combine separate PV and battery converters. Hybrid power conversion systems have required multiple power converters hardware units and multiple power conversion steps adding to efficiency losses, product and installation costs, and reliability issues. Ideal Power Converters has developed and patented a completely new theory of operation for electronic power converters using its indirect EnergyPacket Switching™ topology. It has established successful power converter products for both PV and battery systems, and its 3-Port Hybrid Converter is the first product to exploit the topology’s capability for the industry’s first single-stage multi-port hybrid power converter. This unique low cost approach eliminates the hybrid power conversion bottlenecks when integrating batteries into PV systems. As result this product will significantly accelerate market adoption of these systems.

  6. Smoothing the Eects of Renewable Generation on the Distribution Grid

    E-Print Network [OSTI]

    Naud, Paul S.

    2014-01-01T23:59:59.000Z

    Fortunately, inverter data from a customer with a PV systemsystem, in series with a PV array and ahead of the inverter,PV is fed into an inverter to feed energy into the distribution system.

  7. Modelling PV Deployment: A Tool Developed at CEEP to

    E-Print Network [OSTI]

    Delaware, University of

    ............................................. 6 Figure 3: PV Planner© Simulation of PV Impact on Building Electric Load Profile

  8. NREL/SCE High-Penetration PV Integration Project: Report on Field Demonstration of Advanced Inverter Functionality in Fontana, CA

    SciTech Connect (OSTI)

    Mather, B.

    2014-08-01T23:59:59.000Z

    The National Renewable Energy Laboratory/Southern California Edison High-Penetration PV Integration Project is (1) researching the distribution system level impacts of high-penetration photovoltaic (PV) integration, (2) determining mitigation methods to reduce or eliminate those impacts, and (3) seeking to demonstrate these mitigation methods on actual high-penetration PV distribution circuits. This report describes a field demonstration completed during the fall of 2013 on the Fontana, California, study circuit, which includes a total of 4.5 MW of interconnected utility-scale rooftop PV systems. The demonstration included operating a 2-MW PV system at an off-unity power factor that had been determined during previously completed distribution system modeling and PV impact assessment analyses. Data on the distribution circuit and PV system operations were collected during the 2-week demonstration period. This demonstration reinforces the findings of previous laboratory testing that showed that utility-scale PV inverters are capable of operating at off-unity power factor to mitigate PV impacts; however, because of difficulties setting and retaining PV inverter power factor set points during the field demonstration, it was not possible to demonstrate the effectiveness of off-unity power factor operation to mitigate the voltage impacts of high-penetration PV integration. Lessons learned from this field demonstration are presented to inform future field demonstration efforts.

  9. PV Value | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onYouTube YouTube Note: Since the.pdfBreaking ofOilNEWResponse(Expired) | DepartmentINLDepartmentPV Value PV Value PV

  10. Pressure-equalizing PV assembly and method

    DOE Patents [OSTI]

    Dinwoodie, Thomas L.

    2004-10-26T23:59:59.000Z

    Each PV assembly of an array of PV assemblies comprises a base, a PV module and a support assembly securing the PV module to a position overlying the upper surface of the base. Vents are formed through the base. A pressure equalization path extends from the outer surface of the PV module, past the PV module, to and through at least one of the vents, and to the lower surface of the base to help reduce wind uplift forces on the PV assembly. The PV assemblies may be interengaged, such as by interengaging the bases of adjacent PV assemblies. The base may include a main portion and a cover and the bases of adjacent PV assemblies may be interengaged by securing the covers of adjacent bases together.

  11. PV module mounting method and mounting assembly

    DOE Patents [OSTI]

    Lenox, Carl J.S.; Johnson, Kurt M.

    2013-04-23T23:59:59.000Z

    A method for mounting PV modules to a deck includes selecting PV module layout pattern so that adjacent PV module edges are spaced apart. PV mounting and support assemblies are secured to the deck according to the layout pattern using fasteners extending into the deck. The PV modules are placed on the PV mounting and support assemblies. Retaining elements are located over and secured against the upper peripheral edge surfaces of the PV modules so to secure them to the deck with the peripheral edges of the PV modules spaced apart from the deck. In some examples a PV module mounting assembly, for use on a shingled deck, comprises flashing, a base mountable on the flashing, a deck-penetrating fastener engageable with the base and securable to the deck so to secure the flashing and the base to the shingled deck, and PV module mounting hardware securable to the base.

  12. Gulf Power- Solar PV Program

    Broader source: Energy.gov [DOE]

    '''''All funding has currently been reserved and new applications are no longer being accepted. See Gulf Power's [http://www.gulfpower.com/renewable/solarElectricity.asp Solar PV] web site for more...

  13. 2014 PV Performance Modeling Workshop

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    2014 PV Performance Modeling Workshop Photo courtesy of Sempra Energy 8:00 AM to 9:00 PM Monday, May 5, 2014 At Biltmore Hotel, Santa Clara, California 512014 Agenda: Start Time...

  14. Connecticut Rooftop Solar PV Permitting Guide

    Broader source: Energy.gov [DOE]

    The Connecticut Rooftop Solar PV Permitting Guide is a compilation of best practices and resources for solar PV permitting. The guide includes a summary of current codes and regulations affecting solar PV, best practices for streamlining the municipal permitting process, and tools to assist municipalities in creating a streamlined permit process for residential solar PV. Resources include a solar PV permit application, a structural review worksheet, an inspection checklist, and a model solar zoning ordinance.

  15. PSCAD Modules Representing PV Generator

    SciTech Connect (OSTI)

    Muljadi, E.; Singh, M.; Gevorgian, V.

    2013-08-01T23:59:59.000Z

    Photovoltaic power plants (PVPs) have been growing in size, and the installation time is very short. With the cost of photovoltaic (PV) panels dropping in recent years, it can be predicted that in the next 10 years the contribution of PVPs to the total number of renewable energy power plants will grow significantly. In this project, the National Renewable Energy Laboratory (NREL) developed a dynamic modeling of the modules to be used as building blocks to develop simulation models of single PV arrays, expanded to include Maximum Power Point Tracker (MPPT), expanded to include PV inverter, or expanded to cover an entire PVP. The focus of the investigation and complexity of the simulation determines the components that must be included in the simulation. The development of the PV inverter was covered in detail, including the control diagrams. Both the current-regulated voltage source inverter and the current-regulated current source inverter were developed in PSCAD. Various operations of the PV inverters were simulated under normal and abnormal conditions. Symmetrical and unsymmetrical faults were simulated, presented, and discussed. Both the three-phase analysis and the symmetrical component analysis were included to clarify the understanding of unsymmetrical faults. The dynamic model validation was based on the testing data provided by SCE. Testing was conducted at SCE with the focus on the grid interface behavior of the PV inverter under different faults and disturbances. The dynamic model validation covers both the symmetrical and unsymmetrical faults.

  16. Sandia Energy - PV Modeling & Analysis

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa del Sol Home Distribution Grid IntegrationOffshore Wind RD&D:PV Modeling &

  17. Sandia Energy - PV Value®

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa del Sol Home Distribution Grid IntegrationOffshore Wind RD&D:PVReliabilitySystemsPV

  18. Federal Tax Incentives for PV: Potential Implications for Program Design

    E-Print Network [OSTI]

    Wiser, Ryan; Bolinger, Mark

    2006-01-01T23:59:59.000Z

    Forthcoming. “EPAct 2005’s PV Tax Credits: What Are TheyAssumptions • Installed PV system costs exhibit economies ofFederal Tax Incentives for PV Potential Implications for

  19. Sandia National Laboratories: European PV Solar Energy Conference...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    PV Solar Energy Conference and Exhibition Sandian Presents on PV Failure Analysis at European PV Solar Energy Conference and Exhibition (EU PVSC) On December 15, 2014, in...

  20. Sandia National Laboratories: Sandian Presents on PV Failure...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Modeling & SimulationSandian Presents on PV Failure Analysis at European PV Solar Energy Conference and Exhibition (EU PVSC) Sandian Presents on PV Failure Analysis...

  1. Sandia National Laboratories: PV

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    ECIS-Princeton Power Systems, Inc.: Demand Response Inverter On March 19, 2013, in DETL, Distribution Grid Integration, Energy, Energy Surety, Facilities, Grid Integration,...

  2. Power Flow Analysis Algorithm for Islanded LV Microgrids Including Distributed Generator Units with

    E-Print Network [OSTI]

    Chaudhary, Sanjay

    Power Flow Analysis Algorithm for Islanded LV Microgrids Including Distributed Generator Units With larger portion of growing electricity demand which is being fed through distributed generation (DG power system. Being able to operate in both grid-connected and islanded mode, a microgrid manages

  3. Comparison of Pyranometers vs. PV Reference Cells for Evaluation of PV Array Performance

    SciTech Connect (OSTI)

    Dunn, L.; Gostein, M.; Emery, K.

    2012-09-01T23:59:59.000Z

    As the photovoltaics (PV) industry has grown, the need for accurately monitoring the solar resource of PV power plants has increased. Historically, the PV industry has relied on thermopile pyranometers for irradiance measurements, and a large body of historical irradiance data taken with pyranometers exists. However, interest in PV reference devices is increasing. In this paper, we discuss why PV reference devices are better suited for PV applications, and estimate the typical uncertainties in irradiance measurements made with both pyranometers and PV reference devices. We assert that the quantity of interest in monitoring a PV power plant is the equivalent irradiance under the IEC 60904-3 reference solar spectrum that would produce the same electrical response in the PV array as the incident solar radiation. For PV-plant monitoring applications, we find the uncertainties in irradiance measurements of this type to be on the order of +/-5% for thermopile pyranometers and +/-2.4% for PV reference devices.

  4. PV Systems | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual SiteofEvaluatingGroup |JilinLuOpenNorthOlympiaAnalysis) Jump to:PUD No 1 ofPV Solar PlanetPV

  5. Webinar: Evaluating Roof Structures for Solar PV

    Broader source: Energy.gov [DOE]

    This webinar provides an overview of Connecticut's Structural Review Worksheet for Residential Rooftop Solar PV Systems. The webinar explains how the worksheet should be used and common concerns with wind and dead loads for rooftop solar PV.

  6. City of Sunset Valley- PV Rebate Program

    Broader source: Energy.gov [DOE]

    The City of Sunset Valley offers rebates to local homeowners who install photovoltaic (PV) systems on their properties. The local rebate acts as an add-on to the PV rebates that are offered by...

  7. City of Palo Alto Utilities- PV Partners

    Broader source: Energy.gov [DOE]

    The City of Palo Alto Utilities (CPAU) PV Partners Program offers incentives to customers that install qualifying PV systems. The program, which has a budget of approximately $13 million over 10...

  8. Fault Current Contribution from Single-Phase PV Inverters

    SciTech Connect (OSTI)

    Keller, J.; Kroposki, B.; Bravo, R.; Robles, S.

    2011-01-01T23:59:59.000Z

    A significant increase in photovoltaic (PV) system installations is expected to come on line in the near future and as the penetration level of PV increases, the effect of PV may no longer be considered minimal. One of the most important attributions of additional PV is what effect this may have on protection systems. Protection engineers design protection systems to safely eliminate faults from the electric power system. One of the new technologies recently introduced into the electric power system are distributed energy resources (DER). Currently, inverter-based DER contributes very little to the power balance on all but a few utility distribution systems. As DER become prevalent in the distribution system, equipment rating capability and coordination of protection systems merit a closer investigation. A collaborative research effort between the National Renewable Energy Laboratory (NREL) and Southern California Edison (SCE) involved laboratory short-circuit testing single-phase (240 VAC) residential type (between 1.5 and 7kW) inverters. This paper will reveal test results obtained from these short-circuit tests.

  9. November 21, 2000 PV Lesson Plan 3 PV Array Generating Electricity

    E-Print Network [OSTI]

    Oregon, University of

    November 21, 2000 PV Lesson Plan 3 ­ PV Array Generating Electricity Prepared for the Oregon in Arrays: Solar Cells Generating Electricity Lesson Plan Content: In this lesson, students will learn about electricity. Objectives: Students will learn to use a tool called PV WATTS to calculate the output of PV

  10. Solar Resource and PV Systems Performance

    E-Print Network [OSTI]

    Solar Resource and PV Systems Performance at Selected Test Sites Prepared for the U.S. Department Subtask 11.1 Deliverables 2 and 4: Report on Solar Resource and PV Systems Performance at Selected Test agency thereof. #12;1 Solar Resource and PV Systems Performance at Selected Test Sites Contents 1

  11. PV Odds & Ends by John Wiles

    E-Print Network [OSTI]

    Johnson, Eric E.

    PV Odds & Ends by John Wiles Sponsored by the U.S. Department of Energy There are two primary wiring methods for connecting PV modules together--using exposed single-conductor cables, and using conduits. Each dictates a different grounding method, but in either case, PV modules must always

  12. Analysis and Design of Smart PV Module 

    E-Print Network [OSTI]

    Mazumdar, Poornima

    2012-12-10T23:59:59.000Z

    This thesis explores the design of a smart photovoltaic (PV) module- a PV module in which PV cells in close proximity are electrically grouped to form a pixel and are connected to dc-dc converter blocks which reside embedded in the back pane...

  13. Analysis and Design of Smart PV Module

    E-Print Network [OSTI]

    Mazumdar, Poornima

    2012-12-10T23:59:59.000Z

    This thesis explores the design of a smart photovoltaic (PV) module- a PV module in which PV cells in close proximity are electrically grouped to form a pixel and are connected to dc-dc converter blocks which reside embedded in the back pane...

  14. Sandia Energy - PV Resources

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa del Sol Home Distribution Grid IntegrationOffshore Wind RD&D:PVReliability

  15. How sharp are PV measures?

    E-Print Network [OSTI]

    A. Jencova; S. Pulmannova

    2007-01-11T23:59:59.000Z

    Properties of sharp observables (normalized PV measures) in relation to smearing by a Markov kernel are studied. It is shown that for a sharp observable $P$ defined on a standard Borel space, and an arbitrary observable $M$, the following properties are equivalent: (a) the range of $P$ is contained in the range of $M$; (b) $P$ is a function of $M$; (c) $P$ is a smearing of $M$.

  16. NREL: Technology Deployment - Distributed Generation Interconnection...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Distributed Generation Interconnection Collaborative Become a Member DGIC members are included in quarterly informational meetings and discussions related to distributed PV...

  17. PV output smoothing with energy storage.

    SciTech Connect (OSTI)

    Ellis, Abraham; Schoenwald, David Alan

    2012-03-01T23:59:59.000Z

    This report describes an algorithm, implemented in Matlab/Simulink, designed to reduce the variability of photovoltaic (PV) power output by using a battery. The purpose of the battery is to add power to the PV output (or subtract) to smooth out the high frequency components of the PV power that that occur during periods with transient cloud shadows on the PV array. The control system is challenged with the task of reducing short-term PV output variability while avoiding overworking the battery both in terms of capacity and ramp capability. The algorithm proposed by Sandia is purposely very simple to facilitate implementation in a real-time controller. The control structure has two additional inputs to which the battery can respond. For example, the battery could respond to PV variability, load variability or area control error (ACE) or a combination of the three.

  18. PV prospects: thinPV prospects: thin--film cellsfilm cells Si cell costs

    E-Print Network [OSTI]

    Pulfrey, David L.

    1 PV prospects: thinPV prospects: thin--film cellsfilm cells LECTURE 8 · Si cell costs · optimizing://www.solarbuzz.com/Moduleprices.htm #12;6 Cost of PV modulesCost of PV modules The lowest retail price for a multicrystalline silicon for a monocrystalline silicon module is $1.48 per watt (1.04 per watt), from an Asian retailer. Brand, technical

  19. Ensuring Quality of PV Modules: Preprint

    SciTech Connect (OSTI)

    Kurtz, S.; Wohlgemuth, J.; Hacke, P.; Kempe, M.; Sample, T.; Yamamichi, M.; Kondo, M.; Doi, T.; Otani, K.; Amano, J.

    2011-07-01T23:59:59.000Z

    Photovoltaic (PV) customers need to have confidence in the PV modules they purchase. Currently, no test can quantify a module's lifetime with confidence, but stress tests are routinely used to differentiate PV product designs. We suggest that the industry would be strengthened by using the wisdom of the community to develop a single set of tests that will help customers quantify confidence in PV products. This paper evaluates the need for quality assurance (QA) standards and suggests a path for creating these. Two types of standards are needed: 1) QA of the module design and 2) QA of the manufacturing process.

  20. Sandia National Laboratories: improving PV performance model...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    accuracy PV Performance Modeling Collaborative's New and Improved Website Is Launched On December 10, 2014, in Computational Modeling & Simulation, Energy, Facilities, News, News &...

  1. Sandia National Laboratories: improving PV performance model...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    technical rigor PV Performance Modeling Collaborative's New and Improved Website Is Launched On December 10, 2014, in Computational Modeling & Simulation, Energy, Facilities, News,...

  2. Sandia National Laboratories: PV Performance Modeling Collaborative

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Modeling Collaborative PV Performance Modeling Collaborative's New and Improved Website Is Launched On December 10, 2014, in Computational Modeling & Simulation, Energy,...

  3. Updating Interconnection Screens for PV System Integration

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Abraham Ellis, Roger Hill Sandia National Laboratories Tom Key, Kristen Nicole, Jeff Smith Electric Power Research Institute Updating Interconnection Screens for PV System...

  4. Lodi Electric Utility- PV Rebate Program

    Broader source: Energy.gov [DOE]

    Lodi Electric Utility offers rebates to its residential, commercial, industrial and municipal customers who install photovoltaic (PV) systems. The rebate program is funded with approximately $6...

  5. CPS Energy- Solar PV Rebate Program

    Broader source: Energy.gov [DOE]

    CPS Energy, San Antonio's municipal utility, offers rebates to customers who install solar photovoltaic (PV) systems on their homes, schools, or businesses. There are four rebate "tiers" available...

  6. Lassen Municipal Utility District- PV Rebate Program

    Broader source: Energy.gov [DOE]

    Lassen Municipal Utility District (LMUD) is providing incentives for its customers to purchase solar electric photovoltaic (PV) systems. Rebate levels will decrease annually over the life of the...

  7. Sandia National Laboratories: PV Performance Modeling

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Photovoltaic, Photovoltaic Systems Evaluation Laboratory (PSEL), Renewable Energy, Solar, Solar Newsletter, SunShot The state of the art in PV system monitoring is relatively...

  8. Sandia National Laboratories: organic PV materials

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    organic PV materials Sandians Win 'Best Paper' Award at Photovoltaic Conference in Japan On March 4, 2015, in Computational Modeling & Simulation, Energy, Facilities, News, News &...

  9. Sandia National Laboratories: flexible PV substrate

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    PV substrate Sandia, Endicott Interconnect Technologies, EMCORE, International Micro Industries, NREL, Universal Instruments: Solar Glitter On March 21, 2013, in Capabilities,...

  10. AC PV Modules Take a standard DC PV module and connect a microinverter

    E-Print Network [OSTI]

    Johnson, Eric E.

    , and secure a listing to UL1741 for a pre-assembled module/inverter device, and you have an AC PV module No discussion of PV systems would be complete without a look at the newest inverter technologies that installers Most grid-tied inverters are "string inverters"--they operate with a string of series-connected PV

  11. NREL: Photovoltaics Research - PV News

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Science (SC)Integrated CodesTransparency Visit |Infrastructure John Wohlgemuth,News ThePV News The

  12. Kenmos PV | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are8COaBulkTransmissionSitingProcess.pdfGetecGtelInteriasIowa: EnergyKanabecKenduskeag, Maine: EnergyNewKenmos PV Jump

  13. PV | OpenEI Community

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere I Geothermal Pwer PlantMunhall,Missouri:EnergyOssian, New York:Ozark, Alabama:ASES 2003,PUD No 1PUD No 2PVCoPV

  14. PV Trackers | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual SiteofEvaluatingGroup |JilinLuOpenNorthOlympiaAnalysis) Jump to:PUD No 1 ofPV Solar

  15. Sunshine PV | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-f <Maintained By FaultSunpods Inc Jump to: navigation, searchSunrayPV

  16. Solar PV Permitting and Safety Training Webinar

    Broader source: Energy.gov [DOE]

    This webinar provides training on two permitting resources for municipal inspectors; a prescriptive process for building inspectors and a guidance document for permitting for PV for electrical inspectors. The webinar also runs through a number of key code articles in Massachusetts 2014 electrical code and examines a variety of safety hazards commonly found during or after solar PV installations.

  17. Draft Transcript on Municipal PV Systems

    Broader source: Energy.gov [DOE]

    Webinar on navigating the legal, tax, and finance issues associated with the installation of Municipal PV Systems. The following agenda was developed based on Pat Boylston's experience assisting municipalities with their PV projects and the requests for information that the Solar America City technical team leads have received from many of the 25 Solar America Cities since the April 2008 meeting in Tucson.

  18. PV Integration by Building Energy Management System

    E-Print Network [OSTI]

    Boyer, Edmond

    stands for any variable that could be PV, grid power, or load power if calculation is valid for allPV Integration by Building Energy Management System Rim.Missaouią, Ghaith.Warkozeką, Seddik. BachaLab.grenoble-inp.fr Abstract- This paper focuses on Energy Management System (EMS) applied to the residential sector. The EMS

  19. NREL PV Projects - FUPWG Meeting: "Going Coastal for Energy Efficiency...

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

    NREL PV Projects - FUPWG Meeting: "Going Coastal for Energy Efficiency" NREL PV Projects - FUPWG Meeting: "Going Coastal for Energy Efficiency" fupwgdestinwestby.pdf More...

  20. SunShot Presentation PV Module Reliabity Workshop Opening Session...

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

    Presentation PV Module Reliabity Workshop Opening Session SunShot Presentation PV Module Reliabity Workshop Opening Session This PowerPoint slide deck was originally presented at...

  1. Integrating Solar PV into Energy Services Performance Contracts...

    Energy Savers [EERE]

    Integrating Solar PV into Energy Services Performance Contracts: Options for Local Governments Nationwide Integrating Solar PV into Energy Services Performance Contracts: Options...

  2. advanced modular pv: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Summary Review of Advanced Inverter Technologies for Residential PV Systems Renewable Energy Websites Summary: Summary Review of Advanced Inverter Technologies for Residential PV...

  3. Sandia National Laboratories: PV Performance Analysis and Module...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Performance Analysis and Module Reliability workshop Sandian Presents on PV Failure Analysis at European PV Solar Energy Conference and Exhibition (EU PVSC) On December 15, 2014,...

  4. Low Cost High Concentration PV Systems for Utility Power Generation...

    Energy Savers [EERE]

    Low Cost High Concentration PV Systems for Utility Power Generation Amonix, Inc. Low Cost High Concentration PV Systems for Utility Power Generation Amonix, Inc. A series of brief...

  5. Sandia National Laboratories: Sandia to host PV Bankability workshop...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    ClimateECNews & EventsConferencesSandia to host PV Bankability workshop at Solar Power International (SPI) 2013 Sandia to host PV Bankability workshop at Solar Power International...

  6. Designing PV Incentive Programs to Promote Performance: A Review of Current Practice in the U.S.

    E-Print Network [OSTI]

    Barbose, Galen; Wiser, Ryan; Bolinger, Mark

    2008-01-01T23:59:59.000Z

    J. The Value of Photovoltaic Performance Certification (AM. Performance Monitoring of 900 Individual PhotovoltaicPerformance Test Protocol for Evaluating Inverters Used in Grid-Connected Photovoltaic

  7. THE IMPACT OF CITY-LEVEL PERMITTING PROCESSES ON RESIDENTIAL PV INSTALLATION PRICES AND DEVELOPMENT TIMES

    E-Print Network [OSTI]

    Dong, Changgui

    2014-01-01T23:59:59.000Z

    The installed price of photovoltaic (PV) systems hasprice and development time of residential photovoltaic (PV)

  8. Pressure-equalizing PV assembly and method | OSTI, US Dept of...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Pressure-equalizing PV assembly and method Re-direct Destination: Each PV assembly of an array of PV assemblies comprises a base, a PV module and a support assembly securing the PV...

  9. Grid Connectivity Research, Development & Demonstration Projects

    Broader source: Energy.gov [DOE]

    2013 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Program Annual Merit Review and Peer Evaluation Meeting

  10. Grid Connectivity Research, Development & Demonstration Projects

    Broader source: Energy.gov (indexed) [DOE]

    implement the SAE J28472 DC charging communication protocol Power Line Communication (PLC) over 1 kHz pilot wire requires a broad range of coexistence, crosstalk and...

  11. Geothermal/Grid Connection | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to: navigation, search OpenEI Reference LibraryAdd toWell Testing andGeothermal/Environmentsource

  12. Grid Connected Functionalities | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy ChinaofSchaefer To: CongestionDevelopment of aLoggingsubscriber toSenate |Lead Performer:

  13. Geothermal/Grid Connection | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are8COaBulkTransmissionSitingProcess.pdf Jump1946865°,Park,2005)EnergyAmatitlan GeothermalEnergyArizona

  14. Terawatt Challenge for Thin-Film PV

    SciTech Connect (OSTI)

    Zweibel, K.

    2005-08-01T23:59:59.000Z

    The evolution of PV into one of the world's largest industries is not going to happen without major unforeseen problems. However, this study attempts to address the obvious ones, so that we can put aside the mythology of PV (for example, that it is only ''boutique power'' or that one must pave the world with it to be useful) and get on with changing the world's energy infrastructure. With the years of rapid market growth now under way in PV, the author is sure this will not be the last effort to understand the real potential and pitfalls of meeting the Challenge.

  15. High-Penetration PV Deployment in the Arizona Public Service System, Phase 1 Update: Preprint

    SciTech Connect (OSTI)

    Hambrick, J.; Narang, D.

    2012-06-01T23:59:59.000Z

    In an effort to better understand the impacts of high penetrations of photovoltaic generators on distribution systems, Arizona Public Service and its partners have begun work on a multi-year project to develop the tools and knowledge base needed to safely and reliably integrate high penetrations of utility- and residential-scale photovoltaics (PV). Building upon the APS Community Power Project -- Flagstaff Pilot, this project will analyze the impact of PV on a representative feeder in northeast Flagstaff. To quantify and catalog the effects of the estimated 1.3 MW of PV that will be installed on the feeder (both smaller units at homes as well as large, centrally located systems), high-speed weather and electrical data acquisition systems and digital 'smart' meters are being designed and installed to facilitate monitoring and to build and validate comprehensive, high-resolution models of the distribution system. These models will be used to analyze the impacts of the PV on distribution circuit protection systems (including anti-islanding), predict voltage regulation and phase balance issues, and develop volt/var control schemes. This paper continues from a paper presented at the 2011 IEEE PVSC conference that introduces the project and describes some of the preliminary consideration, as well as project plans and early results. This paper gives a status update of the project and presents selected results from Phase 2 of the project. It discusses baseline feeder modeling, load allocation, data acquisition, utility-scale PV integration, preliminary model validation, and plans for future phases.

  16. Solar Works! In Seattle: Introduction to Solar Electric (PV)

    Broader source: Energy.gov [DOE]

    Presentation slides from residential PV workshop. Also covers general solar resource assessment, siting and financial incentives.

  17. Washington City Power- PV Rebate Program

    Broader source: Energy.gov [DOE]

    Washington City offers a rebate of $1,000 per kilowatt-DC (kW-DC) to customers who install photovoltaic (PV) systems or wind-energy systems. The rebate is limited to $3,000 for residential systems...

  18. Pacific Power- PV Rebate Program (California)

    Broader source: Energy.gov [DOE]

    Pacific Power is providing rebates to their customers who install photovoltaic (PV) systems on their homes and facilities. These rebates step down over time as key installation targets are met. As...

  19. Austin Energy- Commercial Solar PV Incentive Program

    Broader source: Energy.gov [DOE]

    In order to qualify for this program, PV modules must be new and be listed on the California Energy Commission's Go Solar web site. In addition, all solar panels must have a 20-year manufacturer ...

  20. Solar Energy International Solar PV 101 Training

    Office of Energy Efficiency and Renewable Energy (EERE)

    Solar Energy International is offering a five-day training that provides an overview of the three basic PV system applications, primarily focusing on grid-direct systems. The goal of the course is...

  1. PV Module Reliability Research (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2013-06-01T23:59:59.000Z

    This National Center for Photovoltaics sheet describes the capabilities of its PV module reliability research. The scope and core competencies and capabilities are discussed and recent publications are listed.

  2. Merced Irrigation District- PV Buydown Program

    Broader source: Energy.gov [DOE]

    Merced Irrigation District (MID) offers its residential, commercial and non-profit customers a rebate for installing solar electric photovoltaic (PV) systems on their homes and offices. The rebate...

  3. IID Energy- PV Solutions Rebate Program

    Broader source: Energy.gov [DOE]

    '''''IID accepted applications for the 2013 PV Solutions Program from Jan. 2, 2013 – Jan. 31, 2013. Winners were determined via lottery. The program is now closed for the remainder of 2013, but...

  4. SMUD- Non-Residential PV Incentive Program

    Broader source: Energy.gov [DOE]

    SMUD offers cash incentives to commercial, industrial, and non-profit customers who install solar photovoltaic (PV) systems. Customers have the option of taking a one-time, up-front payment through...

  5. Austin Energy- Residential Solar PV Rebate Program

    Broader source: Energy.gov [DOE]

    Austin Energy's Solar Rebate Program offers a $1.50 per watt incentive to eligible residential who install photovoltaic (PV) systems on their homes. Rebates are limited to $15,000 per home...

  6. Austin Energy- Commercial PV Incentive Program

    Broader source: Energy.gov [DOE]

    Austin Energy, a municipal utility, offers a production incentive to its commercial and multi-family residential customers for electricity generated by qualifying photovoltaic (PV) systems of up to...

  7. Plumas-Sierra REC- PV Rebate Program

    Broader source: Energy.gov [DOE]

    Plumas-Sierra REC offers an incentive for its customers to install photovoltaic (PV) systems on homes and businesses. Rebates are available for qualifying systems between one kilowatt (kW) and 25...

  8. City of Lompoc Utilities- PV Rebate Program

    Broader source: Energy.gov [DOE]

    City of Lompoc Utilities provides rebates to its electric customers who purchase and install photovoltaic (PV) systems. The rebate is $2.00 per watt-AC. The incentive amount may not exceed 50% the...

  9. Summary of First PV Performance Modeling Workshop

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AnalystsOther Steve Ransome Navigant SolarTech Modelers CEC-UW Clean Power King Solar Works PVDesign Pro - Hoes Engineering PV*Sol PVSyst Universities U of Arizona U of...

  10. Power losses in PV arrays due to variations in the I-V characteristics of PV modules

    E-Print Network [OSTI]

    Heinemann, Detlev

    Power losses in PV arrays due to variations in the I-V characteristics of PV modules Wolfgang Damm-V characteristics of the 36 individual modules of a PV generator at the University of Oldenburg were measured the basis for the calculations of the mismatch losses due to series and parallel connection of PV modules

  11. The Effect of PV Array Size and Battery Size on the Economics of PV/Diesel/Battery Hybrid RAPS Systems

    E-Print Network [OSTI]

    array on the performance for a diesel/battery/inverter/pv system. It seeks to determine whetherThe Effect of PV Array Size and Battery Size on the Economics of PV/Diesel/Battery Hybrid RAPS WA 6150 Abstract This paper focuses on pv/diesel/battery hybrid RAPS systems meeting loads above 50 k

  12. PV System Energy Evaluation Method (Presentation)

    SciTech Connect (OSTI)

    Kurtz, S.

    2014-01-01T23:59:59.000Z

    This presentation describes a comparison of the "predicted" energy (based on historical weather data) with the "expected" energy (based on the measured weather data) to determine whether a PV system is performing as modeled in order to verify the accuracy of a model. A key factor in defining this energy test is determining the test boundary so that weather variations are not inadvertently included in what is considered to be PV system performance.

  13. PV array simulator development and validation.

    SciTech Connect (OSTI)

    Kuszmaul, Scott S.; Gonzalez, Sigifredo; Lucca, Roberto (Ametek Programmable Power, San Diego, CA); Deuel, Don (Ametek Programmable Power, San Diego, CA)

    2010-06-01T23:59:59.000Z

    The ability to harvest all available energy from a photovoltaic (PV) array is essential if new system developments are to meet levelized cost of energy targets and achieve grid parity with conventional centralized utility power. Therefore, exercising maximum power point tracking (MPPT) algorithms, dynamic irradiance condition operation and startup and shutdown routines and evaluating inverter performance with various PV module fill-factor characteristics must be performed with a repeatable, reliable PV source. Sandia National Laboratories is collaborating with Ametek Programmable Power to develop and demonstrate a multi-port TerraSAS PV array simulator. The simulator will replicate challenging PV module profiles, enabling the evaluation of inverter performance through analyses of the parameters listed above. Energy harvest algorithms have traditionally implemented methods that successfully utilize available energy. However, the quantification of energy capture has always been difficult to conduct, specifically when characterizing the inverter performance under non-reproducible dynamic irradiance conditions. Theoretical models of the MPPT algorithms can simulate capture effectiveness, but full validation requires a DC source with representative field effects. The DC source being developed by Ametek and validated by Sandia is a fully integrated system that can simulate an IV curve from the Solar Advisor Model (SAM) module data base. The PV simulator allows the user to change the fill factor by programming the maximum power point voltage and current parameters and the open circuit voltage and short circuit current. The integrated PV simulator can incorporate captured irradiance and module temperature data files for playback, and scripted profiles can be generated to validate new emerging hardware embedded with existing and evolving MPPT algorithms. Since the simulator has multiple independent outputs, it also has the flexibility to evaluate an inverter with multiple MPPT DC inputs. The flexibility of the PV simulator enables the validation of the inverter's capability to handle vastly different array configurations.

  14. Sandia Energy - Photovoltaic (PV) Regional Test Center (RTC) Website Goes

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa del Sol Home Distribution Grid IntegrationOffshoreLive Photovoltaic (PV) Regional

  15. Sandia Energy - Photovoltaic Regional Testing Center (PV RTC)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa del Sol Home Distribution Grid IntegrationOffshoreLive Photovoltaic (PV)

  16. Sandia Energy - Sandia PV Team Publishes Book Chapter

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa del Sol Home Distribution GridDocuments HomeDatabase on Engine FuelAcademy ofPV Team

  17. Sandia Energy - PV Performance Modeling Collaborative's New and

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa del Sol Home Distribution Grid IntegrationOffshore Wind RD&D:PV Modeling

  18. Photovoltaic Performance and Reliability Database: A Gateway to Experimental Data Monitoring Projects for PV at the Florida Solar Energy Center

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    This site is the gateway to experimental data monitoring projects for photovoltaic (PV) at the Florida Solar Energy Center. The website and the database were designed to facilitate and standardize the processes for archiving, analyzing and accessing data collected from dozens of operational PV systems and test facilities monitored by FSEC's Photovoltaics and Distributed Generation Division. [copied from http://www.fsec.ucf.edu/en/research/photovoltaics/data_monitoring/index.htm

  19. Sustained utility implementation of photovoltaics. Final report

    SciTech Connect (OSTI)

    Osborn, D.E.

    1998-05-01T23:59:59.000Z

    SMUD is a leader in utility grid-connected applications of PVs with the world`s largest distributed PV power system. SMUD is continuing its ambitious sustained, orderly development (SOD) commercialization effort of the grid-connected, utility PV market. This program is aimed at developing the experience needed to successfully integrate PV as distributed generation into the utility system, develop market and long-term business strategies and to stimulate the collaborative processes needed to accelerate the cost-reductions necessary for PV to be cost-competitive in these applications by about the year 2002. This report documents the progress made in the 1994/1995 SMUD PV Program under this contract and the PV projects partially supported by this contract. This contract has been considered a Pre-cursor to the TEAM-UP program implemented the following year.

  20. Sustained utility implementation of photovoltaics. TEAM-UP pre-cursor project, 1994-1995, final report

    SciTech Connect (OSTI)

    Osborn, D.E.; Collier, D.; Miller, K.; Jonas, T.; Gerlach, P.

    1998-05-01T23:59:59.000Z

    Sacramento Municipal Utility District (SMUD) is a leader in utility grid-connected applications of PVs with the world`s largest distributed PV power system. SMUD is continuing its ambitious sustained, orderly development (SOD) commercialization effort of the grid-connected, utility PV market. This program us aimed at developing the experience needed to successfully integrate PV as distributed generation into the utility system, develop market and long-term business strategies and to stimulate the collaborative processes needed to accelerate the cost-reductions necessary for PV to be cost-competitive in these applications by about the year 2002. This report documents the progress made in the 1994/1995 SMUD PV Program under this contract and the PV projects partially supported by this contract.

  1. An Analysis of Residential PV System Price Differences Between the United States and Germany

    E-Print Network [OSTI]

    Seel, Joachim

    2014-01-01T23:59:59.000Z

    barriers for PV systems in Germany at the national level, PVfor residential PV systems in Germany. Bundesverband derof PV Power Applications in Germany 2006, Exchange and

  2. Holdover inoculum of Pseudomonas syringae pv. alisalensis from broccoli raab causes disease in subsequent plantings

    E-Print Network [OSTI]

    Cintas, N A; Koike, S T; Bunch, R A; Bull, C T

    2006-01-01T23:59:59.000Z

    by Pseudomonas syringae pv. alisalensis in California. Plantof Pseudo- monas syringae pv. alisalensis. (Abstr. ) Phyto-2004. Pseudomonas syringae pv. alisalensis and Pseudomonas

  3. Designing PV Incentive Programs to Promote System Performance: A Review of Current Practice

    E-Print Network [OSTI]

    Barbose, Galen; Wiser, Ryan; Bolinger, Mark

    2006-01-01T23:59:59.000Z

    Dan. 2006. Best Practices in PV Rebate Programs: Helpingprogram staff. Designing PV Incentive Programs to PromoteGroup), Mike Taylor Designing PV Incentive Programs to

  4. Designing PV Incentive Programs to Promote Performance: A Review of Current Practice

    E-Print Network [OSTI]

    Barbose, Galen; Wiser, Ryan; Bolinger, Mark

    2007-01-01T23:59:59.000Z

    DESIGNING PV INCENTIVE PROGRAMS TO PROMOTE SYSTEMcustomer-sited photovoltaic (PV) systems, provided throughface to ensuring that their PV systems perform well, and the

  5. An efficient method for visualization and growth of fluorescent Xanthomonas oryzae pv. oryzae in planta.

    E-Print Network [OSTI]

    Han, Sang-Wook; Park, Chang-Jin; Lee, Sang-Won; Ronald, Pamela C

    2008-01-01T23:59:59.000Z

    Background Xanthomonas oryzae pv. oryzae, a yellow-pigmentedsativa L. ) plants. X. oryzae pv. oryzae infection can causetropical Asia [1]. X. oryzae pv. oryzae infects rice leaves

  6. Photovoltaic (PV) Pricing Trends: Historical, Recent, and Near-Term Projections

    E-Print Network [OSTI]

    Feldman, David

    2014-01-01T23:59:59.000Z

    Utility-Scale Photovoltaic (PV) System Prices in the Unitedphotovoltaic (PV) systems has soared in recent years, driven by declining PV prices

  7. A Wavelet-Based Variability Model (WVM) for Solar PV Power Plants

    E-Print Network [OSTI]

    Lave, Matthew; Kleissl, Jan; Stein, Joshua S

    2013-01-01T23:59:59.000Z

    Model (WVM) for Solar PV Power Plants Matthew Lave, Janoutput of a solar photovoltaic (PV) plant was presented andsimulating solar photovoltaic (PV) power plant output given

  8. Approaches To Integrating A HIgh Penertration Of Solar PV and CPV Onto The Electrical Grid

    E-Print Network [OSTI]

    Hill, Steven Craig

    2013-01-01T23:59:59.000Z

    component removal (i.e. inverter, PV panel etc. ) since63  Desired PV Inverter voltage stability. The PV inverter reactive power control

  9. Features of a fully renewable US electricity system: Optimized mixes of wind and solar PV and transmission grid extensions

    E-Print Network [OSTI]

    Becker, Sarah; Andresen, Gorm B; Zeyer, Timo; Schramm, Stefan; Greiner, Martin; Jacobson, Mark Z

    2014-01-01T23:59:59.000Z

    Wind and solar PV generation data for the entire contiguous US are calculated, on the basis of 32 years of weather data with temporal resolution of one hour and spatial resolution of 40x40km$^2$, assuming site-suitability-based as well as stochastic wind and solar PV capacity distributions throughout the country. These data are used to investigate a fully renewable electricity system, resting primarily upon wind and solar PV power. We find that the seasonal optimal mix of wind and solar PV comes at around 80% solar PV share, owing to the US summer load peak. By picking this mix, long-term storage requirements can be more than halved compared to a wind only mix. The daily optimal mix lies at about 80% wind share due to the nightly gap in solar PV production. Picking this mix instead of solar only reduces backup energy needs by about 50%. Furthermore, we calculate shifts in FERC (Federal Energy Regulatory Commission)-level LCOE (Levelized Costs Of Electricity) for wind and solar PV due to their differing resour...

  10. EFFECTIVE EFFICIENCY AND PERFORMANCE RATIO AS ENERGY RATING SYSTEM FOR PV MODULES Marko Topic1

    E-Print Network [OSTI]

    Sites, James R.

    tilts and tracking schemes. Differences arise from different distribution of annual solar energy on the specific location, the tilt angle of the module or the tracking scheme. We have shown that PV modules with lower effective series resistance exhibit better performance at higher irradiation (e.g. in tracking

  11. PV performance modeling workshop summary report.

    SciTech Connect (OSTI)

    Stein, Joshua S.; Tasca, Coryne Adelle (SRA International, Inc., Fairfax, VA); Cameron, Christopher P.

    2011-05-01T23:59:59.000Z

    During the development of a solar photovoltaic (PV) energy project, predicting expected energy production from a system is a key part of understanding system value. System energy production is a function of the system design and location, the mounting configuration, the power conversion system, and the module technology, as well as the solar resource. Even if all other variables are held constant, annual energy yield (kWh/kWp) will vary among module technologies because of differences in response to low-light levels and temperature. A number of PV system performance models have been developed and are in use, but little has been published on validation of these models or the accuracy and uncertainty of their output. With support from the U.S. Department of Energy's Solar Energy Technologies Program, Sandia National Laboratories organized a PV Performance Modeling Workshop in Albuquerque, New Mexico, September 22-23, 2010. The workshop was intended to address the current state of PV system models, develop a path forward for establishing best practices on PV system performance modeling, and set the stage for standardization of testing and validation procedures for models and input parameters. This report summarizes discussions and presentations from the workshop, as well as examines opportunities for collaborative efforts to develop objective comparisons between models and across sites and applications.

  12. DOE High Performance Concentrator PV Project

    SciTech Connect (OSTI)

    McConnell, R.; Symko-Davies, M.

    2005-08-01T23:59:59.000Z

    Much in demand are next-generation photovoltaic (PV) technologies that can be used economically to make a large-scale impact on world electricity production. The U.S. Department of Energy (DOE) initiated the High-Performance Photovoltaic (HiPerf PV) Project to substantially increase the viability of PV for cost-competitive applications so that PV can contribute significantly to both our energy supply and environment. To accomplish such results, the National Center for Photovoltaics (NCPV) directs in-house and subcontracted research in high-performance polycrystalline thin-film and multijunction concentrator devices with the goal of enabling progress of high-efficiency technologies toward commercial-prototype products. We will describe the details of the subcontractor and in-house progress in exploring and accelerating pathways of III-V multijunction concentrator solar cells and systems toward their long-term goals. By 2020, we anticipate that this project will have demonstrated 33% system efficiency and a system price of $1.00/Wp for concentrator PV systems using III-V multijunction solar cells with efficiencies over 41%.

  13. Optimal Dispatch of Photovoltaic Inverters in Residential Distribution Systems

    E-Print Network [OSTI]

    Giannakis, Georgios

    method for determining the active- and reactive-power set points for PV inverters in residential systems and ensuring voltage regulation. Binary PV-inverter selection variables and nonlinear power-flow relations--Distribution networks, inverter control, optimal power flow (OPF), photovoltaic (PV) systems, sparsity, voltage

  14. Evaluation of Encapsulant Materials for PV Applications

    SciTech Connect (OSTI)

    Kempe, M.

    2010-01-01T23:59:59.000Z

    Encapsulant materials used in PV modules serve multiple purposes. They physically hold components in place, provide electrical insulation, optically couple superstrate materials (e.g., glass) to PV cells, protect components from mechanical stress by mechanically de-coupling components via strain relief, and protect materials from corrosion. To do this, encapsulants must adhere well to all surfaces, remain compliant, and transmit light after exposure to temperature, humidity, and UV radiation histories. Encapsulant materials by themselves do not completely prevent water vapour ingress [1-3], but if they are well adhered, they will prevent the accumulation of liquid water providing protection against corrosion as well as electrical shock. Here, a brief review of some of the polymeric materials under consideration for PV applications is provided, with an explanation of some of their advantages and disadvantages.

  15. Updating Interconnection Screens for PV System Integration

    SciTech Connect (OSTI)

    Coddington, M.; Mather, B.; Kroposki, B.; Lynn, K.; Razon, A.; Ellis, A.; Hill, R.; Key, T.; Nicole, K.; Smith, J.

    2012-02-01T23:59:59.000Z

    This white paper evaluates the origins and usefulness of the capacity penetration screen, offer short-term solutions which could effectively allow fast-track interconnection to many PV system applications, and considers longer-term solutions for increasing PV deployment levels in a safe and reliable manner while reducing or eliminating the emphasis on the penetration screen. Short-term and longer-term alternatives approaches are offered as examples; however, specific modifications to screening procedures should be discussed with stakeholders and must ultimately be adopted by state and federal regulatory bodies.

  16. International PV QA Task Force's Proposed Comparative Rating System for PV Modules: Preprint

    SciTech Connect (OSTI)

    Wohlgemuth, J.; Kurtz, S.

    2014-10-01T23:59:59.000Z

    The International PV Quality Assurance Task Force is developing a rating system that provides comparative information about the relative durability of PV modules. Development of accelerated stress tests that can provide such comparative information is seen as a major step toward being able to predict PV module service life. This paper will provide details of the ongoing effort to determine the format of such an overall module rating system. The latest proposal is based on using three distinct climate zones as defined in IEC 60721-2-1 for two different mounting systems. Specific stresses beyond those used in the qualification tests are being developed for each of the selected climate zones.

  17. axonopodis pv phaseoli: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    control objective is to balance the power flow from the PV module to the battery and the load such that the PV power is utilized effectively and the battery is charged with three...

  18. arboricola pv pruni: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    the battery charging loop. The control objective is to balance the power flow from the PV module to the battery and the load such that the PV power is utilized effectively and...

  19. accelerating pv cost: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    mix of wind and solar PV comes at around 80% solar PV share, owing to the US summer load peak. By picking this mix, long-term storage requirements can be more than halved...

  20. Breakout Session: Getting in the Loop: PV Hardware Recycling...

    Energy Savers [EERE]

    Getting in the Loop: PV Hardware Recycling and Sustainability Breakout Session: Getting in the Loop: PV Hardware Recycling and Sustainability May 21, 2014 6:30PM to 7:30PM PDT...

  1. Kauai, Hawaii: Solar Resource Analysis and High-Penetration PV...

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

    Hourly satellite solar radiation information is used to determine the amount of annual solar energy that can be pro- duced from PV for the designated area populated with PV....

  2. NREL PV Projects - FUPWG Meeting: "Going Coastal for Energy Efficiency...

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

    PV Projects FUPWG Meeting: "Going Costal for Energy Efficiency" Bob Westby, NREL FEMP Program Manager and Sustainable NREL Lead April 14-16, 2008 Contents * Mesa Top PV project -...

  3. Analyzing and simulating the variability of solar irradiance and solar PV powerplants

    E-Print Network [OSTI]

    Lave, Matthew S.

    2012-01-01T23:59:59.000Z

    WVM) for Solar PV Power Plants, Sustainable Energy, IEEESolar PV Power Plants," IEEE Transactions on Sustainable Energy,

  4. A Wavelet-Based Variability Model (WVM) for Solar PV Power Plants

    E-Print Network [OSTI]

    Lave, Matthew; Kleissl, Jan; Stein, Joshua S

    2013-01-01T23:59:59.000Z

    simulating solar photovoltaic (PV) power plant output givenfor simulating the power output of a solar photovoltaic (PV)

  5. PV Performance and Reliability Validation Capabilities at Sandia...

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

    Performance and Reliability Validation Capabilities at Sandia National Laboratories PV Performance and Reliability Validation Capabilities at Sandia National Laboratories This...

  6. El Paso Electric Company- Solar PV Pilot Program

    Broader source: Energy.gov [DOE]

    '''''El Paso Electric's 2013 Solar PV Rebate program will reopen at 12:00 pm MST on February 1, 2013.'''''

  7. Electricity Rate Structures and the Economics of Solar PV: Could Mandatory Time-of-Use Rates Undermine California’s Solar Photovoltaic Subsidies?

    E-Print Network [OSTI]

    Borenstein, Severin

    2007-01-01T23:59:59.000Z

    the Twenty- Sixth IEEE Photovoltaic Specialists Conference,T. and R. Margolis. “Are Photovoltaic Systems Worth More toLarge Grid- Connected Photovoltaic Systems in California and

  8. VADE-MECUM DE LA VORTICITE POTENTIELLE Dfinition (PV) P=

    E-Print Network [OSTI]

    Legras, Bernard

    VADE-MECUM DE LA VORTICITE POTENTIELLE Définition (PV) P= rot u2 Unité 1PVU = 106 K kg1 m2 s1 Pour les mouvements inviscides et adiabatiques, la PV est conservée pour chaque particule. Forme 102 s1 . La PV croît en magnitude vers les pôles. Ceci est dű ŕ la croissance de |f| vers les pôles

  9. Personeelsvereniging Technische Universiteit Eindhoven DOE MEE met de PV !!

    E-Print Network [OSTI]

    Franssen, Michael

    Personeelsvereniging Technische Universiteit Eindhoven DOE MEE met de PV !! Eindhoven 12 maart 2012 Het bestuur van de PV is dringend op zoek naar verjonging en nieuwe invulling van de volgende rollen Aanspreekpunt voor activiteiten Exacte invulling van de functie, mogelijk in duo, in overleg met het PV bestuur

  10. pV3 Programmer's Guide Client Side & Concentrator Programming

    E-Print Network [OSTI]

    Peraire, Jaime

    pV3 Programmer's Guide Rev. 2.05 Client Side & Concentrator Programming Bob Haimes Massachusetts.I.T., and USER agrees to preserve same. 2 #12;Contents 1 Introduction 6 2 pV3 in the Message Passing Environment 7 2.1 Using PVM Message Passing with the Simulation . . . . . . . . . . . . . . . . . . . . 7 2.2 pV

  11. November 21, 2000 PV Lesson Plan 2 Sample Questions & Answers

    E-Print Network [OSTI]

    Oregon, University of

    November 21, 2000 PV Lesson Plan 2 ­ Sample Questions & Answers Prepared for the Oregon Million a single PV cell produces; so how can you get the amperage that you need? 4. You want to run your small CD player that requires 17 Watts. If you have a 12% efficient PV array operating about noon on a sunny day

  12. IRRADIANCE MAPS APPLIED FOR THE PERFORMANCE ASSESSMENT OF PV SYSTEMS

    E-Print Network [OSTI]

    Heinemann, Detlev

    IRRADIANCE MAPS APPLIED FOR THE PERFORMANCE ASSESSMENT OF PV SYSTEMS - A CASE STUDY FOR THE GERMAN energy yield of a PV system,methods based on irradiance maps published by weather services or others-connected PV systems. DATA USED Hourly time series from ground and satellite-derived horizontal global

  13. Informations et rservations : ce.pv-holidays.com

    E-Print Network [OSTI]

    Arleo, Angelo

    Informations et réservations : ce.pv-holidays.com * Offre valable pour tout séjour de 7 nuits détails sur ce.pv-holidays.com. Offre valable sur l'hébergement seul (hors frais de dossier, prestations cumulable avec votre remise partenaire, toute offre promotionnelle ou réductions. PV-CPDistribution, Société

  14. Experience Curves and Solar PV Fred Heutte, Senior Policy Associate

    E-Print Network [OSTI]

    Experience Curves and Solar PV Fred Heutte, Senior Policy Associate NW Energy Coalition September 3 resources costs as being ranges rather than fixed values. It is evident that the question of future solar PV small percentage of all resources at present, there is a strong sense that once solar PV reaches "grid

  15. A GUIDE TO PHOTOVOLTAIC (PV) SYSTEM DESIGN AND INSTALLATION

    E-Print Network [OSTI]

    CALIFORNIA ENERGY COMMISSION A GUIDE TO PHOTOVOLTAIC (PV) SYSTEM DESIGN AND INSTALLATION JUNE 2001 TO PHOTOVOLTAIC (PV) SYSTEM DESIGN AND INSTALLATION Prepared for: California Energy Commission Energy Technology installing photovoltaic (PV) systems under the Emerging Renewables Buydown Program. This is the first

  16. 2 IAEI NEWS September . October 2011 www.iaei.org perspectives on pv

    E-Print Network [OSTI]

    Johnson, Eric E.

    design and configuration -- and some of the newer systems with micro inverters or AC PV modules have 1202 IAEI NEWS September . October 2011 www.iaei.org perspectives on pv www.iaei.org September . October 2011 IAEI NEWS 3 perspectives on pv P hotovoltaic (PV) power systems have PV modules and PV arrays

  17. Role of Polycrystalline Thin-Film PV Technologies in Competitive PV Module Markets: Preprint

    SciTech Connect (OSTI)

    von Roedern, B.; Ullal, H. S.

    2008-05-01T23:59:59.000Z

    This paper discusses the developments in thin-film PV technologies and provides an outlook on future commercial module efficiencies achievable based on today's knowledge about champion cell performance.

  18. Commercialization of PV-powered pumping systems for use in utility PV service programs. Final report

    SciTech Connect (OSTI)

    NONE

    1997-03-01T23:59:59.000Z

    The project described in this report was a commercialization effort focused on cost-effective remote water pumping systems for use in utility-based photovoltaic (PV) service programs. The project combined a commercialization strategy tailored specifically for electric utilities with the development of a PV-powered pumping system that operates conventional ac pumps rather than relying on the more expensive and less reliable PV pumps on the market. By combining these two attributes, a project goal was established of creating sustained utility purchases of 250 PV-powered water pumping systems per year. The results of each of these tasks are presented in two parts contained in this Final Summary Report. The first part summarizes the results of the Photovoltaic Services Network (PSN) as a new business venture, while the second part summarizes the results of the Golden Photon system installations. Specifically, results and photographs from each of the system installations are presented in this latter part.

  19. Solar Photovoltaic (PV) System Permit Application Checklist

    Broader source: Energy.gov [DOE]

    The Permit Application Checklist is intended to be used as a best management practice when establishing local government requirements for residential and commercial solar photovoltaic (PV) system permits. Local governments may modify this checklist to accommodate their local ordinances, code requirements, and permit procedures.

  20. Advanced Photovoltaic Inverter Functionality using 500 kW Power Hardware-in-Loop Complete System Laboratory Testing: Preprint

    SciTech Connect (OSTI)

    Mather, B. A.; Kromer, M. A.; Casey, L.

    2013-01-01T23:59:59.000Z

    With the increasing penetration of distribution connected photovoltaic (PV) systems, more and more PV developers and utilities are interested in easing future PV interconnection concerns by mitigating some of the impacts of PV integration using advanced PV inverter controls and functions. This paper describes the testing of a 500 kW PV inverter using Power Hardware-in-Loop (PHIL) testing techniques. The test setup is described and the results from testing the inverter in advanced functionality modes, not commonly used in currently interconnected PV systems, are presented. PV inverter operation under PHIL evaluation that emulated both the DC PV array connection and the AC distribution level grid connection are shown for constant power factor (PF) and constant reactive power (VAr) control modes. The evaluation of these modes was completed under varying degrees of modeled PV variability.

  1. Renewable Hydrogen: Technology Review and Policy Recommendations for State-Level Sustainable Energy Futures

    E-Print Network [OSTI]

    Lipman, Timothy; Edwards, Jennifer Lynn; Brooks, Cameron

    2006-01-01T23:59:59.000Z

    of a 7 kW grid-connected PV array with battery backup and anPV electricity output is primarily used to charge the battery

  2. Sandia Energy - PV Systems Reliability

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa del Sol Home Distribution Grid IntegrationOffshore Wind RD&D:PVReliabilitySystems

  3. Development of a dispatchable PV peak shaving system. Final report on PV:BONUS Phase 2 activities

    SciTech Connect (OSTI)

    Ferguson, W.D. [Conectiv, Inc., Wilmington, DE (United States); Nigro, R.M. [Applied Energy Group, Inc., Hauppauge, NY (United States)

    1999-01-20T23:59:59.000Z

    In July 1993, the Delmarva Power and Light Company (now Conectiv, Inc.) was awarded a contract for the development of a Dispatchable Photovoltaic Peak Shaving System under the US Department of Energy PV:BONUS Program. The rationale for the dispatchable PV peak shaving system is based on the coincidence between the solar resource and the electrical load in question. Where poor coincidence exists, a PV array by itself does little to offset peak demands. However, with the addition of a relatively small amount of energy storage, the energy from the PV array can be managed and the value of the PV system increases substantially. In Phase 2, Delmarva Power continued the refinement of the system deployed in Phase 1. Four additional dispatchable PV peak shaving systems were installed for extended testing and evaluation at sites in Delaware, Maryland, Wisconsin and North Carolina. A second type of system that can be used to provide back-up power as well as peak shaving was also developed in Phase 2. This PV-UPS system used a packaging approach nearly identical to the PV peak shaving system, although there were significant differences in the design of the power electronics and control systems. Conceptually, the PV-UPS system builds upon the idea of adding value to PV systems by increasing functionality. A prototype of the PV-UPS system was installed in Delaware for evaluation near the end of the contract period.

  4. Maximum Photovoltaic Penetration Levels on Typical Distribution Feeders: Preprint

    SciTech Connect (OSTI)

    Hoke, A.; Butler, R.; Hambrick, J.; Kroposki, B.

    2012-07-01T23:59:59.000Z

    This paper presents simulation results for a taxonomy of typical distribution feeders with various levels of photovoltaic (PV) penetration. For each of the 16 feeders simulated, the maximum PV penetration that did not result in steady-state voltage or current violation is presented for several PV location scenarios: clustered near the feeder source, clustered near the midpoint of the feeder, clustered near the end of the feeder, randomly located, and evenly distributed. In addition, the maximum level of PV is presented for single, large PV systems at each location. Maximum PV penetration was determined by requiring that feeder voltages stay within ANSI Range A and that feeder currents stay within the ranges determined by overcurrent protection devices. Simulations were run in GridLAB-D using hourly time steps over a year with randomized load profiles based on utility data and typical meteorological year weather data. For 86% of the cases simulated, maximum PV penetration was at least 30% of peak load.

  5. Cascaded Microinverter PV System for Reduced Cost

    SciTech Connect (OSTI)

    Bellus, Daniel R.; Ely, Jeffrey A.

    2013-04-29T23:59:59.000Z

    In this project, a team led by Delphi will develop and demonstrate a novel cascaded photovoltaic (PV) inverter architecture using advanced components. This approach will reduce the cost and improve the performance of medium and large-sized PV systems. The overall project objective is to develop, build, and test a modular 11-level cascaded three-phase inverter building block for photovoltaic applications and to develop and analyze the associated commercialization plan. The system will be designed to utilize photovoltaic panels and will supply power to the electric grid at 208 VAC, 60 Hz 3-phase. With the proposed topology, three inverters, each with an embedded controller, will monitor and control each of the cascade sections, reducing costs associated with extra control boards. This report details the final disposition on this project.

  6. Materials Testing for PV Module Encapsulation

    SciTech Connect (OSTI)

    Jorgensen, G.; Terwilliger, K.; Glick, S.; Pern, J.; McMahon, T.

    2003-05-01T23:59:59.000Z

    Important physical properties of materials used in PV module packaging are presented. High-moisture-barrier, high-resistivity, adhesion-promoting coatings on polyethyl-ene terephthalate (PET) films have been fabricated and characterized for use in PV module application and com-pared to standard polymer backsheet materials. Ethylene vinyl acetate (EVA) and an encapsulant replacement for EVA are studied for their water vapor transmission rate (WVTR) and adhesion properties. WVTR, at test conditions up to 85C/100% relative humidity (RH), and adhesion val-ues are measured before and after filtered xenon arc lamp ultraviolet (UV) exposure and damp heat exposure at 85C/85% RH. Water ingress is quantified by weight gain and embedded humidity sensors.

  7. Fig. 1. Single line diagram of 3-phase distribution power system with five inverters in parallel.

    E-Print Network [OSTI]

    Silva, Filipe Faria Da

    (PV) generation, it has been showed that occasionally the PV inverters were switched off undesirably or exceeded the harmonic regulations [2]. Even though each of the PV inverter meets the grid codes, the power distribution power system with five inverters in parallel. Harmonic Stability Assessment for Multi- Paralleled

  8. NREL/SCE High Penetration PV Integration Project: FY13 Annual Report

    SciTech Connect (OSTI)

    Mather, B. A.; Shah, S.; Norris, B. L.; Dise, J. H.; Yu, L.; Paradis, D.; Katiraei, F.; Seguin, R.; Costyk, D.; Woyak, J.; Jung, J.; Russell, K.; Broadwater, R.

    2014-06-01T23:59:59.000Z

    In 2010, the National Renewable Energy Laboratory (NREL), Southern California Edison (SCE), Quanta Technology, Satcon Technology Corporation, Electrical Distribution Design (EDD), and Clean Power Research (CPR) teamed to analyze the impacts of high penetration levels of photovoltaic (PV) systems interconnected onto the SCE distribution system. This project was designed specifically to benefit from the experience that SCE and the project team would gain during the installation of 500 megawatts (MW) of utility-scale PV systems (with 1-5 MW typical ratings) starting in 2010 and completing in 2015 within SCE's service territory through a program approved by the California Public Utility Commission (CPUC). This report provides the findings of the research completed under the project to date.

  9. A two-genome microarray for the rice pathogens Xanthomonas oryzae pv. oryzae and X. oryzae pv. oryzicola and its use in the discovery of a difference in their regulation of hrp genes.

    E-Print Network [OSTI]

    2008-01-01T23:59:59.000Z

    of Xanthomonas oryzae pv. oryzae hrp Genes in XOM2, a Novelin Xanthomonas oryzae pv. oryzae. Journal of bacteriologyrice by Xanthomonas oryzae pv. oryzicola. Mol Plant-Microbe

  10. Jiangxi Solar PV Corp JSPV aka Solar PV Corporation | Open Energy

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are8COaBulkTransmissionSitingProcess.pdfGetecGtelInterias SolarJaneJefferson,Information PV Corp JSPV aka Solar PV

  11. BeyondPV Co Ltd Bayang Solar PV | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual Siteof EnergyInnovation in Carbonof Alternative Sources ofBeyondPV Co Ltd Bayang Solar PV

  12. Study on PID Resistance of HIT PV Modules

    Broader source: Energy.gov (indexed) [DOE]

    2013 Photovoltaic Module Reliability Workshop NREL, Golden, CO February 26-27, 2013 Study on PID resistance of HIT PV modules Tasuku Ishiguro 1 , Hiroshi Kanno 1 , Mikio...

  13. Sandia Energy - PV Performance Modeling Collaborative's New and...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Modeling & Simulation Solar Newsletter Photovoltaic Systems Evaluation Laboratory (PSEL) PV Performance Modeling Collaborative's New and Improved Website Is Launched Previous Next...

  14. PV Arc Fault Detector Challenges Due to Module Frequency Response...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    This poster does not contain any proprietary or confidential information. Introduction PV system arc faults have led to a number of rooftop fires which have caused significant...

  15. Sandia National Laboratories: 2014 PV Systems Symposium Details

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    2014 PV Systems Symposium (May 5-7, 2014) Sandia National Laboratories and the Electric Power Research Institute (EPRI) are delighted to host this symposium on technical issues...

  16. Tucson's Solar Experience: Developing PV with RFPs and PPAs

    Energy Savers [EERE]

    Tucson's Solar Experience: Developing PV with RFPs and PPAs Bruce Plenk Solar Coordinator City of Tucson Office of Conservation and Sustainable Development DOE EERE- January 15,...

  17. Sandia National Laboratories: verify PV performance-prediction...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    PV performance-prediction models Solar Regional Test Center in Vermont Achieves Milestone Installation On September 23, 2014, in Concentrating Solar Power, Energy, Facilities,...

  18. Estimating Rooftop Suitability for PV: A Review of Methods, Patents...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    For researchers looking to understand the market potential of rooftop-installed photovoltaics (PV) in particular, understanding the amount and characteristics of rooftop space...

  19. Sandia National Laboratories: c-Si PV materials

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    c-Si PV materials Sandians Win 'Best Paper' Award at Photovoltaic Conference in Japan On March 4, 2015, in Computational Modeling & Simulation, Energy, Facilities, News, News &...

  20. Sandia National Laboratories: III-V PV materials

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    V PV materials Sandians Win 'Best Paper' Award at Photovoltaic Conference in Japan On March 4, 2015, in Computational Modeling & Simulation, Energy, Facilities, News, News &...

  1. Technology and Climate Trends in PV Module Degradation (Presentation)

    SciTech Connect (OSTI)

    Jordan, D.; Wohlgemuth, J.; Kurtz, S.

    2012-10-01T23:59:59.000Z

    To sustain the commercial success of photovoltaic (PV) technology it is vital to know how power output decreases with time. Unfortunately, it can take years to accurately measure the long-term degradation of new products, but past experience on older products can provide a basis for prediction of degradation rates of new products. An extensive search resulted in more than 2000 reported degradation rates with more than 1100 reported rates that include some or all IV parameters. In this presentation we discuss how the details of the degradation data give clues about the degradation mechanisms and how they depend on technology and climate zones as well as how they affect current and voltage differently. The largest contributor to maximum power decline for crystalline Si technologies is short circuit current (or maximum current) degradation and to a lesser degree loss in fill factor. Thin-film technologies are characterized by a much higher contribution from fill factor particularly for humid climates. Crystalline Si technologies in hot & humid climates also display a higher probability to show a mixture of losses (not just short circuit current losses) compared to other climates. The distribution for the module I-V parameters (electrical mismatch) was found to change with field exposure. The distributions not only widened but also developed a tail at the lower end, skewing the distribution.

  2. Technology and Climate Trends in PV Module Degradation: Preprint

    SciTech Connect (OSTI)

    Jordan, D. C.; Wohlgemuth, J. H.; Kurtz, S. R.

    2012-10-01T23:59:59.000Z

    To sustain the commercial success of photovoltaic (PV) technology it is vital to know how power output decreases with time. Unfortunately, it can take years to accurately measure the long-term degradation of new products, but past experience on older products can provide a basis for prediction of degradation rates of new products. An extensive search resulted in more than 2000 reported degradation rates with more than 1100 reported rates that include some or all IV parameters. In this paper we discuss how the details of the degradation data give clues about the degradation mechanisms and how they depend on technology and climate zones as well as how they affect current and voltage differently. The largest contributor to maximum power decline for crystalline Si technologies is short circuit current (or maximum current) degradation and to a lesser degree loss in fill factor. Thin-film technologies are characterized by a much higher contribution from fill factor particularly for humid climates. Crystalline Si technologies in hot & humid climates also display a higher probability to show a mixture of losses (not just short circuit current losses) compared to other climates. The distribution for the module I-V parameters (electrical mismatch) was found to change with field exposure. The distributions not only widened but also developed a tail at the lower end, skewing the distribution.

  3. Sacramento Municipal Utility District PV and Smart Grid Pilot at Anatolia

    SciTech Connect (OSTI)

    Rawson, Mark; Sanchez, Eddie Paul

    2013-12-30T23:59:59.000Z

    Under DE-FOA-0000085 High Penetration Solar Deployment, the U. S. Department of Energy funded agreements with SMUD and Navigant Consulting, SunPower, GridPoint, the National Renewable Energy Laboratory, and the California Energy Commission for this pilot demonstration project. Funding was $5,962,409.00. Cost share of $500,000 was also provided by the California Energy Commission. The project has strategic implications for SMUD, other utilities and the PV and energy-storage industries in business and resource planning, technology deployment and asset management. These implications include: -At this point, no dominant business models have emerged and the industry is open for new ideas. -Demonstrated two business models for using distributed PV and energy storage, and brainstormed several dozen more, each with different pros and cons for SMUD, its customers and the industry. -Energy storage can be used to manage high penetrations of PV and mitigate potential issues such as reverse power flow, voltage control violations, power quality issues, increased wear and tear on utility equipment, and system wide power supply issues. - Smart meters are another tool utilities can use to manage high penetrations of PV. The necessary equipment and protocols exist, and the next step is to determine how to integrate the functionality with utility programs and what level of utility control is required. - Time-of-use rates for the residential customers who hosted energy storage systems did not cause a significant change in energy usage patterns. However, the rates we used were not optimized for PV and energy storage. Opportunities exist for utilities to develop new structures.

  4. Identification and Characterization of Performance Limiting Regions in Poly-Si Wafers Used for PV Cells: Preprint

    SciTech Connect (OSTI)

    Guthrey, H.; Gorman, B.; Al-Jassim, M.

    2011-07-01T23:59:59.000Z

    As demand for silicon photovoltaic (PV) material increases, so does the need for cost-effective feedstock and production methods that will allow enhanced penetration of silicon PV into the total energy market. The focus on cost minimization for production of polycrystalline silicon (poly-Si) PV has led to relaxed feedstock purity requirements, which has also introduced undesirable characteristics into cast poly-Si PV wafers. To produce cells with the highest possible conversion efficiencies, it is crucial to understand how reduced purity requirements and defects that are introduced through the casting process can impair minority carrier properties in poly-Si PV cells. This is only possible by using multiple characterization techniques that give macro-scale information (such as the spatial distribution of performance-limiting regions), as well as micro and nano-scale information about the structural and chemical nature of such performance-limiting regions. This study demonstrates the usefulness of combining multiple techniques to analyze performance-limiting regions in the poly-Si wafers that are used for PV cells. This is done by first identifying performance-limiting regions using macro-scale techniques including photoluminescence (PL) imaging, microwave photoconductive decay (uPCD), and reflectometry), then using smaller-scale techniques such as scanning electron microscopy (SEM), electron backscattered diffraction (EBSD), laser ablation inductively coupled mass spectrometry (LA-ICP-MS), cathodoluminescence (CL), and transmission electron microscopy (TEM) to understand the nature of such regions. This analysis shows that structural defects as well as metallic impurities are present in performance-limiting regions, which together act to decrease conversion efficiencies in poly-Si PV cells.

  5. PV AND GRID RELIABILITY: AVAILABILITY OF PV POWER DURING CAPACITY SHORTFALLS

    E-Print Network [OSTI]

    Perez, Richard R.

    from a stream of actual load and PV output data: (1) The effective load carrying capability (ELCC output was simulated using high-resolution satellite cloud cover data [7]. The results are reported; (3) the solar load controller's (SLC) minimum temperature adjustment [6], is an other indirect

  6. Integrating Solar PV in Utility System Operations

    SciTech Connect (OSTI)

    Mills, A.; Botterud, A.; Wu, J.; Zhou, Z.; Hodge, B-M.; Heany, M.

    2013-10-31T23:59:59.000Z

    This study develops a systematic framework for estimating the increase in operating costs due to uncertainty and variability in renewable resources, uses the framework to quantify the integration costs associated with sub-hourly solar power variability and uncertainty, and shows how changes in system operations may affect these costs. Toward this end, we present a statistical method for estimating the required balancing reserves to maintain system reliability along with a model for commitment and dispatch of the portfolio of thermal and renewable resources at different stages of system operations. We estimate the costs of sub-hourly solar variability, short-term forecast errors, and day-ahead (DA) forecast errors as the difference in production costs between a case with “realistic” PV (i.e., subhourly solar variability and uncertainty are fully included in the modeling) and a case with “well behaved” PV (i.e., PV is assumed to have no sub-hourly variability and can be perfectly forecasted). In addition, we highlight current practices that allow utilities to compensate for the issues encountered at the sub-hourly time frame with increased levels of PV penetration. In this analysis we use the analytical framework to simulate utility operations with increasing deployment of PV in a case study of Arizona Public Service Company (APS), a utility in the southwestern United States. In our analysis, we focus on three processes that are important in understanding the management of PV variability and uncertainty in power system operations. First, we represent the decisions made the day before the operating day through a DA commitment model that relies on imperfect DA forecasts of load and wind as well as PV generation. Second, we represent the decisions made by schedulers in the operating day through hour-ahead (HA) scheduling. Peaking units can be committed or decommitted in the HA schedules and online units can be redispatched using forecasts that are improved relative to DA forecasts, but still imperfect. Finally, we represent decisions within the operating hour by schedulers and transmission system operators as real-time (RT) balancing. We simulate the DA and HA scheduling processes with a detailed unit-commitment (UC) and economic dispatch (ED) optimization model. This model creates a least-cost dispatch and commitment plan for the conventional generating units using forecasts and reserve requirements as inputs. We consider only the generation units and load of the utility in this analysis; we do not consider opportunities to trade power with neighboring utilities. We also do not consider provision of reserves from renewables or from demand-side options. We estimate dynamic reserve requirements in order to meet reliability requirements in the RT operations, considering the uncertainty and variability in load, solar PV, and wind resources. Balancing reserve requirements are based on the 2.5th and 97.5th percentile of 1-min deviations from the HA schedule in a previous year. We then simulate RT deployment of balancing reserves using a separate minute-by-minute simulation of deviations from the HA schedules in the operating year. In the simulations we assume that balancing reserves can be fully deployed in 10 min. The minute-by-minute deviations account for HA forecasting errors and the actual variability of the load, wind, and solar generation. Using these minute-by-minute deviations and deployment of balancing reserves, we evaluate the impact of PV on system reliability through the calculation of the standard reliability metric called Control Performance Standard 2 (CPS2). Broadly speaking, the CPS2 score measures the percentage of 10-min periods in which a balancing area is able to balance supply and demand within a specific threshold. Compliance with the North American Electric Reliability Corporation (NERC) reliability standards requires that the CPS2 score must exceed 90% (i.e., the balancing area must maintain adequate balance for 90% of the 10-min periods). The combination of representing DA forecast errors in the

  7. Energy 101: Solar PV | Department of Energy

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville Power AdministrationField Campaign:INEAWaterCool Roofs Energy 101: Cool RoofsLumens EnergySolar PV

  8. Zhonghuite PV Technology Co | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro IndustriesTownDells, Wisconsin: EnergyWyandanch,Eaga Solar LtdZhonghuite PV Technology Co Jump

  9. PV Powered Inc | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere I Geothermal Pwer PlantMunhall,Missouri:EnergyOssian, New York:Ozark, Alabama:ASES 2003,PUD No 1PUD No 2PV

  10. All Solar PV | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual Siteof Energy 2,AUDIT REPORT Americium/CuriumAgua Caliente Solar PowerAlaskanSolar PV Jump

  11. Gansu PV Co Ltd | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual Siteof Energy 2,AUDIT REPORTEnergyFarms A SUK Place: Newport, Wales,DanielJieyuanPV Co Ltd

  12. PV Solar Planet | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual SiteofEvaluatingGroup |JilinLuOpenNorthOlympiaAnalysis) Jump to:PUD No 1 ofPV Solar Planet

  13. Tokyo Electron PV | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty Edit withTianlin Baxin Hydropower Station Jump to:Tioga EnergyTokyo Electron PV Jump

  14. Realisation of the full potential of PV Extract of report from workgroup 4 in EU's PV Technology Platform by Peter Ahm.

    E-Print Network [OSTI]

    Realisation of the full potential of PV Extract of report from workgroup 4 in EU's PV Technology. Realisation of the full potential of PV as an important and integral part of our energy supply to those that use it. There is thus an imperative to facilitate and promote education on PV

  15. Comparison Between TRNSYS Software Simulation and PV F-Chart Program on Photovoltaic System

    E-Print Network [OSTI]

    Haberl, J. S.; Baltazar, J. C.; Mao, C.

    2012-01-01T23:59:59.000Z

    This report covers the comparisons of Photovoltaic System by TRNSYS simulation and PV F-Chart program to test TRNSYS simulation accuracy. The report starts with the Photovoltaic (PV) (PV) System introduction in Section one which is followed...

  16. U.S. Aims for Zero-Energy: Support for PV on New Homes

    E-Print Network [OSTI]

    Barbose, Galen; Wiser, Ryan; Bolinger, Mark

    2006-01-01T23:59:59.000Z

    Figure 1. Relative Cost of PV on New, Market-Rate Homesfor Zero-Energy: Support for PV on New Homes Galen Barbose,segment for solar photovoltaic (PV) adoption, new homes have

  17. Shaking Up the Residential PV Market: Implications of Recent Changes to the ITC

    E-Print Network [OSTI]

    Bolinger, Mark

    2008-01-01T23:59:59.000Z

    Shaking Up the Residential PV Market: Implications of Recentfor commercial photovoltaic (PV) systems from 10% to 30% of2005’s solar tax credits on PV system owners, in light of

  18. Approaches To Integrating A HIgh Penertration Of Solar PV and CPV Onto The Electrical Grid

    E-Print Network [OSTI]

    Hill, Steven Craig

    2013-01-01T23:59:59.000Z

    63  Off?Grid (Stand?Alone) PV Power System not well established. OFF-GRID (STAND-ALONE) PV POWER SYSTEMvariability characteristics of off-grid PV power systems and

  19. Genome sequence and rapid evolution of the rice pathogen Xanthomonas oryzae pv. oryzae PXO99A.

    E-Print Network [OSTI]

    2008-01-01T23:59:59.000Z

    relationships among X. oryzae pv. oryzae (Xoo) strains PXO99MAFF311018, and X. oryzae pv. oryzicola (Xoc) strain BLS256biology of Xanthomonas oryzae pv. oryzae and approaches to

  20. Do PV Systems Increase Residential Selling Prices If So, How Can Practitioners Estimate This Increase?

    E-Print Network [OSTI]

    Hoen, Ben

    2013-01-01T23:59:59.000Z

    No. DE-AC02-05CH11231. Do PV Systems Increase Residentialimpacts of photovoltaic (PV) energy systems on home salesthat existing homes with PV systems sold for a premium over

  1. Ectopic expression of rice Xa21 overcomes developmentally controlled resistance to Xanthomonas oryzae pv. oryzae.

    E-Print Network [OSTI]

    2010-01-01T23:59:59.000Z

    of Xanthomonas oryzae pv. oryzae AvrXa21 and implicationsto Xanthomonas oryzae pv. oryzae Chang-Jin Park a , Sang-Wonreceptor XA21 Xanthomonas oryzae pv. oryzae a b s t r a c t

  2. The Economic Value of PV and Net Metering to Residential Customers in California

    E-Print Network [OSTI]

    Darghouth, Naim

    2010-01-01T23:59:59.000Z

    a Substantial Benefit of Solar PV”, The Electricity Journal,2008. MRW & Associates. “Solar PV and Retail Rate Design”,The Economic Value of PV and Net Metering to Residential

  3. BRST Invariant PV Regularization of SUSY Yang-Mills and SUGRA

    E-Print Network [OSTI]

    Gaillard, Mary K

    2012-01-01T23:59:59.000Z

    September 2011 BRST Invariant PV Regularization of SUSYemployer. ii BRST INVARIANT PV REGULARIZATION OF SUSY YANG-a number of years on Pauli-Villars (PV) regu- larization of

  4. Approaches To Integrating A HIgh Penertration Of Solar PV and CPV Onto The Electrical Grid

    E-Print Network [OSTI]

    Hill, Steven Craig

    2013-01-01T23:59:59.000Z

    for use in solar PV systems (inverters listed to UL 1741)disconnection of PV inverters during system transients thatModeling systems will need detailed PV inverter models in

  5. Designing PV Incentive Programs to Promote Performance: A Review of Current Practice

    E-Print Network [OSTI]

    Barbose, Galen; Wiser, Ryan; Bolinger, Mark

    2007-01-01T23:59:59.000Z

    manufacturers of PV modules and inverters are to establishPV modules, and UL- 1741 is the analogous standard for inverters andPV incentive programs surveyed for this paper, most require that inverters

  6. Comparison Between TRNSYS Software Simulation and PV F-Chart Program on Photovoltaic System 

    E-Print Network [OSTI]

    Haberl, J. S.; Baltazar, J. C.; Mao, C.

    2012-01-01T23:59:59.000Z

    This report covers the comparisons of Photovoltaic System by TRNSYS simulation and PV F-Chart program to test TRNSYS simulation accuracy. The report starts with the Photovoltaic (PV) (PV) System introduction in Section one which is followed...

  7. Step-Stress Accelerated Degradation Testing (SSADT) for Photovoltaic (PV) Devices and Cells (Presentation)

    SciTech Connect (OSTI)

    Lee, J.; Elmore, R.; Suh, C.; Jones, W.

    2010-10-01T23:59:59.000Z

    Presentation on step-stress accelerated degradation testing (SSADT) for photovoltaics (PV). Developed are a step-stress degradation test (SSADT) for PV reliability tests and a lifetime prediction model for PV products.

  8. Power Systems Engineering Research Center Modeling, Analysis and Deployment of High PV

    E-Print Network [OSTI]

    Van Veen, Barry D.

    and equipment using GIS data, loads using AMI data and PV systems using measured PV output from extensive data electronics and grid integration of renew- able resources mainly solar PV and wind. Dr. Ayyanar received

  9. Grid-tied PV battery systems.

    SciTech Connect (OSTI)

    Barrett, Keith Phillip; Gonzalez, Sigifredo; Hund, Thomas D.

    2010-09-01T23:59:59.000Z

    Grid tied PV energy smoothing was implemented by using a valve regulated lead-acid (VRLA) battery as a temporary energy storage device to both charge and discharge as required to smooth the inverter energy output from the PV array. Inverter output was controlled by the average solar irradiance over the previous 1h time interval. On a clear day the solar irradiance power curve is offset by about 1h, while on a variable cloudy day the inverter output power curve will be smoothed based on the average solar irradiance. Test results demonstrate that this smoothing algorithm works very well. Battery state of charge was more difficult to manage because of the variable system inefficiencies. Testing continued for 30-days and established consistent operational performance for extended periods of time under a wide variety of resource conditions. Both battery technologies from Exide (Absolyte) and East Penn (ALABC Advanced) proved to cycle well at a Partial state of charge over the time interval tested.

  10. Oxynitride Thin Film Barriers for PV Packaging

    SciTech Connect (OSTI)

    Glick, S. H.; delCueto, J. A.; Terwilliger, K. M.; Jorgensen, G. J.; Pankow, J. W.; Keyes, B. M.; Gedvilas, L. M.; Pern, F. J.

    2005-11-01T23:59:59.000Z

    Dielectric thin-film barrier and adhesion-promoting layers consisting of silicon oxynitride materials (SiOxNy, with various stoichiometry) were investigated. For process development, films were applied to glass (TCO, conductive SnO2:F; or soda-lime), polymer (PET, polyethylene terephthalate), aluminized soda-lime glass, or PV cell (a-Si, CIGS) substrates. Design strategy employed de-minimus hazard criteria to facilitate industrial adoption and reduce implementation costs for PV manufacturers or suppliers. A restricted process window was explored using dilute compressed gases (3% silane, 14% nitrous oxide, 23% oxygen) in nitrogen (or former mixtures, and 11.45% oxygen mix in helium and/or 99.999% helium dilution) with a worst-case flammable and non-corrosive hazard classification. Method employed low radio frequency (RF) power, less than or equal to 3 milliwatts per cm2, and low substrate temperatures, less than or equal to 100 deg C, over deposition areas less than or equal to 1000 cm2. Select material properties for barrier film thickness (profilometer), composition (XPS/FTIR), optical (refractive index, %T and %R), mechanical peel strength and WVTR barrier performance are presented.

  11. Final Technical Report - Photovoltaics for You (PV4You) Program

    SciTech Connect (OSTI)

    Weissman, J.M.; Sherwood, L.; Pulaski, J.; Cook, C.; Kalland, S.; Haynes, J.

    2005-08-14T23:59:59.000Z

    In September 2000, the Interstate Renewable Energy Council (IREC) began its 5-year work on contract # DE-FGO3-00SF22116, the Photovoltaics for You (PV4You) Project. The objective was to develop and distribute information on photovoltaics and to educate key stakeholder groups including state government agencies, local government offices, consumer representative agencies, school officials and students, and Million Solar Roofs Partnerships. In addition, the project was to identify barriers to the deployment of photovoltaics and implement strategies to overcome them. Information dissemination and education was accomplished by publishing newsletters; creating a base of information, guides, and models on the www.irecusa.org and the www.millionsolarroofs.org web sites; convening workshops and seminars; engaging multiple stakeholders; and widening the solar network to include new consumers and decision makers. Two major web sites were maintained throughout the project cycle. The www.irecusa.org web site housed dedicated pages for Connecting to the Grid, Schools Going Solar, Community Outreach, and Certification & Training. The www.millionsolarroofs.org web site was created to serve the MSR Partnerships with news, interviews, key documents, and resource material. Through the course of this grant, the Interstate Renewable Energy Council has been supporting the Department of Energy?s solar energy program goals by providing the Department with expertise services for their network of city, state, and community stakeholders. IREC has been the leading force at the state and federal levels regarding net metering and interconnection policy for photovoltaic systems. The principal goal and benefit of the interconnection and net metering work is to lower both barriers and cost for the installation of PV. IREC typically plays a leadership role among small generator stakeholders and has come to be relied upon for its expertise by industry and regulators. IREC also took a leadership position in developing quality and competency standards for solar professionals and for training programs ? critical components to bring the solar industry into step with other recognized craft labor forces. IREC?s objective was to provide consumer assurances and assist the states and the solar industry in building a strong and qualified workforce. IREC?s Schools Going Solar Clearinghouse provided channels of information to educate students, teachers, parents and the community at large about the benefits of solar energy. Solar school projects enhance science and math education while creating an initial entry market for domestic PV. And, IREC?s community and outreach network got the right information out to capture the interest and met the needs of different audiences and reached groups that weren?t traditionally part of the solar community. IREC?s PV4You project was effective because it resulted in reduced costs through easier interconnection and better net metering agreements and by raising the competency standards for solar practitioners. The project provided ways to eliminate barriers and constraints by providing technical assistance, offering model agreements based on industry consensus that were used by state and local decision makers. And, the project increased public acceptance by providing information, news and guidelines for different audiences.

  12. Interconnecting PV on NYC's Secondary Network Distribution System

    Broader source: Energy.gov [DOE]

    To assess ways to improve the interconnection process, NREL conducted a four-part study with support from DOE. The NREL team then compiled the final reports from each study into this report.

  13. Modeling Distribution Connected PV and Interconnection Study Analysis

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville PowerCherries 82981-1cnHighandSWPA / SPRA /Ml'. William Hirst HirstModeling &

  14. Photovoltaic (PV) Pricing Trends: Historical, Recent, and Near-Term

    E-Print Network [OSTI]

    Photovoltaic (PV) Pricing Trends: Historical, Recent, and Near-Term Projections November 2012 #12;Photovoltaic (PV) Pricing Trends: Historical, Recent, and Near-Term Projections David Feldman1 , Galen Barbose2 , Robert Margolis1 , Ryan Wiser2 , NaĂŻm Darghouth2 , and Alan Goodrich1 1 National Renewable Energy

  15. Separating myths from reality in PV inverter reliability

    E-Print Network [OSTI]

    Rollins, Andrew M.

    Separating myths from reality in PV inverter reliability Or, How I learned to stop worrying: Navigant Consulting report to NREL on PV inverter status. NCI found that inverters were limited by 18 and love the BOM Timothy J. Peshek SDLE Reliability workshop, CWRU 4/9/2012 #12;What inverter manufacturers

  16. An Analysis of Residential PV System Price Differences between the United States and Germany

    E-Print Network [OSTI]

    Seel, Joachim

    2014-01-01T23:59:59.000Z

    why residential customers in Germany pay 25% less for a PVFor Residential PV Systems in Germany. Bundesverband derof PV power applications in Germany”. International Energy

  17. Analyzing and simulating the variability of solar irradiance and solar PV powerplants

    E-Print Network [OSTI]

    Lave, Matthew S.

    2012-01-01T23:59:59.000Z

    Models of diffuse solar radiation, Renew Energ, 33 (2008) [solar irradiance for analyzing areally- totalized PV systems, Sol Energsolar irradiance for analyzing areally- totalized PV systems, Sol Energ

  18. Linkage to Previous International PV Module QA Task Force Workshops; Proposal for Rating System (Presentation)

    SciTech Connect (OSTI)

    Kurtz, S.; Wohlgemuth, J.; Sample, T.; Yamamichi, M.; Kondo, M.

    2013-05-01T23:59:59.000Z

    This presentation gives the historical background of the creation of the International PV QA Task Force as an introduction to the PV Module Reliability Workshop.

  19. Photovoltaic (PV) Pricing Trends: Historical, Recent, and Near-Term Projections

    E-Print Network [OSTI]

    Feldman, David

    2014-01-01T23:59:59.000Z

    if at all. Super monocrystalline PV modules are currentlyPV modules varies from about 10% (for tandem microcrystalline-amorphous silicon) to 20% (for super monocrystalline

  20. The Falling Price of Utility-Scale Solar Photovoltaic (PV) Projects...

    Office of Environmental Management (EM)

    Solar Photovoltaic (PV) Projects The Falling Price of Utility-Scale Solar Photovoltaic (PV) Projects Data courtesy of National Renewable Energy Lab. Chart by Daniel Wood. View...

  1. Utility Scale PV Perspective on SunShot Progress and Opportunities...

    Energy Savers [EERE]

    Utility Scale PV Perspective on SunShot Progress and Opportunities Utility Scale PV Perspective on SunShot Progress and Opportunities These slides correspond to a presentation...

  2. A Wavelet-Based Variability Model (WVM) for Solar PV Power Plants

    E-Print Network [OSTI]

    Lave, Matthew; Kleissl, Jan; Stein, Joshua S

    2013-01-01T23:59:59.000Z

    Model (WVM) for Solar PV Power Plants Matthew Lave, Jansolar photovoltaic (PV) power plant output given a singleproduce a simulated power plant output. The WVM is validated

  3. Notice of Intent to Issue Funding Opportunity for Integrated PV and Energy Storage Systems

    Broader source: Energy.gov [DOE]

    As solar power plants proliferate, the variability and uncertainty of the solar resource poses challenges for integrating PV with electric power systems at both the distribution and bulk system levels. In response to these challenges, the U.S. Department of Energy Office of Energy Efficiency and Renewable Energy (EERE) has issued a notice of intent (NOI) to release the SunShot Sustainable and Holistic IntegratioN of Energy storage and Solar (SHINES) funding opportunity. SHINES will enable the holistic design, development, and widespread sustainable deployment of low-cost, flexible, and reliable energy storage solutions, and will strive to successfully integrate these solutions into PV power plants. SHINES projects can also focus on demand response and load management to achieve target metrics.

  4. Local Control of Reactive Power by Distributed Photovoltaic Generators

    E-Print Network [OSTI]

    Turitsyn, Konstantin S; Backhaus, Scott; Chertkov, Misha

    2010-01-01T23:59:59.000Z

    High penetration levels of distributed photovoltaic (PV) generation on an electrical distribution circuit may severely degrade power quality due to voltage sags and swells caused by rapidly varying PV generation during cloud transients coupled with the slow response of existing utility compensation and regulation equipment. Although not permitted under current standards for interconnection of distributed generation, fast-reacting, VAR-capable PV inverters may provide the necessary reactive power injection or consumption to maintain voltage regulation under difficult transient conditions. As side benefit, the control of reactive power injection at each PV inverter provides an opportunity and a new tool for distribution utilities to optimize the performance of distribution circuits, e.g. by minimizing thermal losses. We suggest a local control scheme that dispatches reactive power from each PV inverter based on local instantaneous measurements of the real and reactive components of the consumed power and the re...

  5. Lessons Learned from the Photovoltaic Manufacturing Technology/PV Manufacturing R&D and Thin Film PV Partnership Projects

    SciTech Connect (OSTI)

    Margolis, R.; Mitchell, R.; Zweibel, K.

    2006-09-01T23:59:59.000Z

    As the U.S. Department of Energy's (DOE's) Solar Energy Technologies Program initiates new cost-shared solar energy R&D under the Solar America Initiative (SAI), it is useful to analyze the experience gained from cost-shared R&D projects that have been funded through the program to date. This report summarizes lessons learned from two DOE-sponsored photovoltaic (PV) projects: the Photovoltaic Manufacturing Technology/PV Manufacturing R&D (PVMaT/PVMR&D) project and the Thin-Film PV Partnership project. During the past 10-15 years, these two projects have invested roughly $330 million of government resources in cost-shared R&D and leveraged another $190 million in private-sector PV R&D investments. Following a description of key findings and brief descriptions of the PVMaT/PVMR&D and Thin-Film PV Partnership projects, this report presents lessons learned from the projects.

  6. Analytical Improvements in PV Degradation Rate Determination

    SciTech Connect (OSTI)

    Jordan, D. C.; Kurtz, S. R.

    2011-02-01T23:59:59.000Z

    As photovoltaic (PV) penetration of the power grid increases, it becomes vital to know how decreased power output may affect cost over time. In order to predict power delivery, the decline or degradation rates must be determined accurately. For non-spectrally corrected data several complete seasonal cycles (typically 3-5 years) are required to obtain reasonably accurate degradation rates. In a rapidly evolving industry such a time span is often unacceptable and the need exists to determine degradation rates accurately in a shorter period of time. Occurrence of outliers and data shifts are two examples of analytical problems leading to greater uncertainty and therefore to longer observation times. In this paper we compare three methodologies of data analysis for robustness in the presence of outliers, data shifts and shorter measurement time periods.

  7. Electrochemical Approaches to PV Busbar Application

    SciTech Connect (OSTI)

    Pankow, J. W.

    2005-01-01T23:59:59.000Z

    Busbars are an integral component of any thin-film photovoltaic module and must be easy and quick to apply by PV manufacturers, as well as provide long-term reliability in deployed modules. Potential reliability issues include loss of adhesion and delamination, chemical instability under current collection conditions (electromigration or corrosion), compatibility of material and application method with subsequent encapsulation steps. Several new and novel busbar materials and application methods have been explored, including adhering metal busbars with various one- and two-part conductive epoxies or conductive adhesive films, ultrasonic bonding of metal busbar strips, and bonding of busbar strips using low-temperature solders. The most promising approach to date has been the direct application of metal busbars via various electrochemical techniques, which offers a variety of distinct advantages.

  8. Innovations in Wind and Solar PV Financing

    SciTech Connect (OSTI)

    Cory, K.; Coughlin, J.; Jenkin, T.; Pater, J.; Swezey, B.

    2008-02-01T23:59:59.000Z

    There is growing national interest in renewable energy development based on the economic, environmental, and security benefits that these resources provide. Historically, greater development of our domestic renewable energy resources has faced a number of hurdles, primarily related to cost, regulation, and financing. With the recent sustained increase in the costs and associated volatility of fossil fuels, the economics of renewable energy technologies have become increasingly attractive to investors, both large and small. As a result, new entrants are investing in renewable energy and new business models are emerging. This study surveys some of the current issues related to wind and solar photovoltaic (PV) energy project financing in the electric power industry, and identifies both barriers to and opportunities for increased investment.

  9. PV Validation and Bankability Workshop: San Jose, California

    SciTech Connect (OSTI)

    Granata, J.; Howard, J.

    2011-12-01T23:59:59.000Z

    This report is a collaboration between Sandia National Laboratories, the National Renewable Energy Laboratory, and the Florida Solar Energy Center (FSEC). The report provides feedback from the U.S. Department of Energy's (DOE) Solar Program PV Validation and Bankability Workshop in San Jose, California on August 31, 2011. It focuses on the current state of PV in the United States, private funding to fund U.S. PV industry growth, roles and functions of the regional test center program, and ways to improve the current validation and bankability practices.

  10. 12 IAEI NEWS July.August 2004 www.iaei.org PERSPECTIVES ON PV

    E-Print Network [OSTI]

    Johnson, Eric E.

    12 IAEI NEWS July.August 2004 www.iaei.org PERSPECTIVES ON PV A series of articles on photovoltaic (PV) power systems and the National Electrical Code Single Conductor Exposed Cables! Not In My or commercial PV installation. Yes, PV systems have some unusual wiring meth- ods allowed by the Code. However

  11. 18 IAEI NEWS November.December 2004 www.iaei.org PERSPECTIVES ON PV

    E-Print Network [OSTI]

    Johnson, Eric E.

    18 IAEI NEWS November.December 2004 www.iaei.org PERSPECTIVES ON PV Photo 1. Framed PV modules A series of articles on photovoltaic (PV) power systems and the National Electrical Code by John Wiles Stalking the Elusive and Somewhat Strange PV System #12;www.iaei.org November.December 2004 IAEI NEWS 19

  12. Do PV Systems Increase Residential Selling Prices If So, How Can Practitioners Estimate This Increase?

    E-Print Network [OSTI]

    Hoen, Ben

    2013-01-01T23:59:59.000Z

    of Photovoltaic Energy Systems on Residential Selling Pricesof photovoltaic (PV) energy systems on home sales prices.

  13. 80 IAEI NEWS March.April 2005 www.iaei.org PERSPECTIVES ON PV

    E-Print Network [OSTI]

    Johnson, Eric E.

    the PV array. However, dc and ac disconnects must be located at the inverter and an additional ac for a readily accessible, visible-blade, lockable ac disconnect for the PV system. These disconnect requirements were covered in the article on PV systems in the March/April 2004 issue of the IAEI News. PV Source

  14. A Global Maximum Power Point Tracking Method for PV Module Integrated Converters

    E-Print Network [OSTI]

    Liberzon, Daniel

    with large arrays of series-connected PV mod- ules connected to a central inverter. Figure 1(a) depicts, it is conceivable that these systems do not extract the maximum possible power from the PV array when individual PV to partial shading. In such systems, power electronics circuits are integrated directly with PV modules

  15. 66 IAEI NEWS September.October 2004 www.iaei.org PERSPECTIVES ON PV

    E-Print Network [OSTI]

    Johnson, Eric E.

    of utility-interactive PV systems use inverters that operate up to 600 volts direct current (dc conductors. PV Inverters Create Separately Derived Systems The second area focuses on the fact that PV, but not all, PV systems (both stand- alone systems and utility-interactive systems) employ an inverter

  16. 80 IAEI NEWS May . June 2012 www.iaei.org Microinverters and ac Pv Modules

    E-Print Network [OSTI]

    Johnson, Eric E.

    and code require- ments. However, they are different from the typical PV string inverters that use multiple80 IAEI NEWS May . June 2012 www.iaei.org Microinverters and ac Pv Modules M icroinverters and AC PV modules are becom- ing very common in residential and small commercial PV systems. See photos 1

  17. Optimum Inverter Sizing in Consideration of Irradiance Pattern and PV Incentives

    E-Print Network [OSTI]

    Lehman, Brad

    Optimum Inverter Sizing in Consideration of Irradiance Pattern and PV Incentives Song Chen* Peng Li for a PV system. The method evaluates effects of PV incentive policies, inverter efficiency curves, different scenarios of PV incentives are discussed and compared to show that the optimal inverter size

  18. IAEI NEWS November.December 2007 www.iaei.org WHY INSPECT PV SYSTEMS

    E-Print Network [OSTI]

    Johnson, Eric E.

    and have not worked extensively with these new PV compa- nies. New equipment (inverters and PV modules IAEI NEWS November.December 2007 www.iaei.org WHY INSPECT PV SYSTEMS P hotovoltaic power systems. Previous articles in this "Perspectives on PV" series have covered the details of the Code requirements

  19. Modeling and Simulation of Solar PV Arrays under Changing Illumination Conditions

    E-Print Network [OSTI]

    Lehman, Brad

    shadows (a passing cloud) on the output power of solar PV arrays. Each solar array is composed of a matrix of a shaded solar PV array as well as the PV output power. The model is also able to simulate and compute the output power of solar PV arrays for any configuration, with or without bypass diode. NOMENCLATURE IM

  20. Pallets of PV: Communities Purchase Solar and Drive Down Costs...

    Open Energy Info (EERE)

    Pallets of PV: Communities Purchase Solar and Drive Down Costs Together Home > Groups > OpenEI Community Central Graham7781's picture Submitted by Graham7781(2017) Super...

  1. Impact of Soiling and Pollution on PV Generation Performance

    Broader source: Energy.gov [DOE]

    This 5-page technical letter addresses air pollution effects on PV performance by quantifying, based on a literature search, the average annual loss due to soiling, the impact of cleaning, and a recommended cleaning schedule.

  2. New York Sun Competitive PV Program (New York)

    Broader source: Energy.gov [DOE]

    The New York Sun Competitive Photovoltaic (PV) Program is an expansion of the Renewable Portfolio Standard (RPS) Customer-Sited Tier Regional Program that includes Upstate New York. The New York...

  3. Taunton Municipal Lighting Plant- Residential PV Rebate Program

    Broader source: Energy.gov [DOE]

    Customers of Taunton Municipal Lighting Plant (TMLP) may be eligible for $2.00/watt rebate on solar photovoltaic (PV) installations. The minimum system size eligible for this rebate is 1 kilowatt ...

  4. Gainesville Regional Utilities- Solar-Electric (PV) System Rebate Program

    Broader source: Energy.gov [DOE]

    '''''NOTE: Application targets for fiscal year 2013 have been met for the GRU Solar PV Rebate Program. The next round of applications are scheduled to open on October 1, 2013 pending approval of...

  5. Giant Leap Forward Toward Quality Assurance of PV Modules (Presentation)

    SciTech Connect (OSTI)

    Kurtz, S.; Wohlgemuth, J.; Sample, T.; Yamamichi, M.

    2012-03-01T23:59:59.000Z

    The presentation describes the composition of and motivation for the International PV QA Task Force, then describes the presentations and discussion that occurred at the workshop on Feb. 29th, 2012.

  6. Agenda for the PV Module Reliability Workshop, February 26 -...

    Broader source: Energy.gov (indexed) [DOE]

    PV Modules to Hygrothermal Stress" 9. P. Hacke and K. Terwilliger of NREL; S. Koch, T. Weber, and J. Berghold of PI-Berlin; S.Hoffmann, H. Ambrosi, and M. Koehl of Fraunhofer ISE;...

  7. AEP SWEPCO - SMART Source Solar PV Program | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    Amount Residential: 1.50watt DC Non-residential: 1.20watt DC Provider Smart Source PV Program Southwestern Electric Power Company (SWEPCO) offers rebates to customers that...

  8. AEP Texas Central Company- SMART Source Solar PV Rebate Program

    Broader source: Energy.gov [DOE]

    American Electric Power Texas Central Company (AEP-TCC) offers rebates to customers that install photovoltaic (PV) systems on homes or other buildings. Customers of all rate classes are eligible to...

  9. AEP Texas North Company- SMART Source Solar PV Rebate Program

    Broader source: Energy.gov [DOE]

    American Electric Power Texas North Company (AEP-TNC) offers rebates to customers that install photovoltaic (PV) systems on homes or other buildings. Customers of all rate classes (e.g.,...

  10. Tucson's Solar Experience: Developing PV with RFPs and PPAs

    Office of Energy Efficiency and Renewable Energy (EERE)

    This presentation was given January 15, 2013, by Bruce Plenk, Solar Coordinator for the City of Tucson, Arizona, as part of the CommRE Developing PV Projects With RFPs and PPAs webinar.

  11. Full Steam Ahead for PV in US Homes?

    SciTech Connect (OSTI)

    Bolinger, Mark A; Barbose, Galen; Wiser, Ryan

    2009-01-15T23:59:59.000Z

    In October 2008, the United States Congress extended both the residential and commercial solar investment tax credits (ITCs) for an unprecedented eight years, lifted the $2,000 cap on the residential credit, removed the prohibition on utility use of the commercial credit, and eliminated restrictions on the use of both credits in conjunction with the Alternative Minimum Tax. These significant changes, which apply to systems placed in service on or after January 1, 2009, will increase the value of the solar credits for residential system owners in particular, and are likely--in conjunction with state, local, and utility rebate programs targeting solar--to spur significant growth in residential, commercial, and utility-scale photovoltaic (PV) installations in the years ahead. This article focuses specifically on the residential credit, describing three areas in which removal of the $2,000 cap on the residential ITC will have significant implications for PV rebate program administrators, PV system owners, and the PV industry.

  12. DOE-LPO-MiniReport_PV_v10

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

    Department of Energy's Loan Programs O ce (LPO) was instrumental in launching the utility-scale photovoltaic (PV) solar industry in the United States. In 2009, there was not a...

  13. PV VALUE(tm) User Manual v. 1.0

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    PV Value(tm) User Manual v. 1.0 Jamie L. Johnson - Solar Power Electric(tm) Geoffrey T. Klise - Sandia National Laboratories 1312012 SAND2012-0682P Sandia National Laboratories...

  14. Evaluation of tracking flat plate and concentrator PV systems

    SciTech Connect (OSTI)

    Lepley, T. [Phasor Energy Co., Phoenix, AZ (United States); Hammond, B.; Harris, A. [Arizona State Univ., Tempe, AZ (United States)

    1997-12-31T23:59:59.000Z

    Arizona Public Service Company has conducted side-by-side field tests of most of the leading tracking flat plate and concentrating PV technologies. The results verify the added value due to tracking, but show that additional reliability improvements are needed in most cases. Concentrator PV systems can be high performers in sunny regions. In addition, a novel inverter system design by Raytheon has demonstrated excellent performance and promises to be more reliable and have lower cost than competing technologies.

  15. Review of PV Inverter Technology Cost and Performance Projections

    SciTech Connect (OSTI)

    Navigant Consulting Inc.

    2006-01-01T23:59:59.000Z

    The National Renewable Energy Laboratory (NREL) has a major responsibility in the implementation of the U.S. Department of Energy's (DOE's) Solar Energy Technologies Program. Sandia National Laboratories (SNL) has a major role in supporting inverter development, characterization, standards, certifications, and verifications. The Solar Energy Technologies Program recently published a Multiyear Technical Plan, which establishes a goal of reducing the Levelized Energy Cost (LEC) for photovoltaic (PV) systems to $0.06/kWh by 2020. The Multiyear Technical Plan estimates that, in order to meet the PV system goal, PV inverter prices will need to decline to $0.25-0.30 Wp by 2020. DOE determined the need to conduct a rigorous review of the PV Program's technical and economic targets, including the target set for PV inverters. NREL requested that Navigant Consulting Inc.(NCI) conduct a review of historical and projected cost and performance improvements for PV inverters, including identification of critical barriers identified and the approaches government might use to address them.

  16. Continuing Developments in PV Risk Management: Strategies, Solutions, and Implications

    SciTech Connect (OSTI)

    Lowder, T.; Mendelsohn, M.; Speer, B.; Hill, R.

    2013-02-01T23:59:59.000Z

    As the PV industry matures, successful risk management practices will become more imperative to ensure investor confidence, control costs, and facilitate further growth. This report discusses several key aspects of risk management during the commercial- and utility-scale project life cycle, from identification of risks, to the process of mitigating and allocating those risks among project parties, to transferring those risks through insurance. The report also explores novel techniques in PV risk management, options to offload risks onto the capital markets, and innovative insurance policies (namely warranty policies) that address risks unique to the PV sector. One of the major justifications for robust risk management in the PV industry is the cost-reduction opportunities it affords. If the PV industry can demonstrate the capability to successfully manage its risks, thereby inspiring confidence in financiers, it may be able to obtain a lower cost of capital in future transactions. A lower cost of capital translates to a lower cost of energy, which will in turn enhance PV?s competitiveness at a time when it will have to rely less on subsidies to support its market penetration.

  17. How Can We Make PV Modules Safer?: Preprint

    SciTech Connect (OSTI)

    Wohlgemuth, J. H.; Kurtz, S. R.

    2012-06-01T23:59:59.000Z

    Safety is a prime concern for the photovoltaics (PV) industry. As a technology deployed on residential and commercial buildings, it is critical that PV not cause damage to the buildings nor harm the occupants. Many of the PV systems on buildings are of sufficiently high voltage (300 to 600 Volts dc) that they may present potential hazards. These PV systems must be safe in terms of mechanical damage (nothing falls on someone), shock hazard (no risk of electrical shock when touching an exposed circuit element), and fire (the modules neither cause nor promote a fire). The present safety standards (IEC 61730 and UL 1703) do a good job of providing for design rules and test requirements for mechanical, shock, and spread of flame dangers. However, neither standard addresses the issue of electrical arcing within a module that can cause a fire. To make PV modules, they must be designed, built, and installed with an emphasis on minimizing the potential for open circuits and ground faults. This paper provides recommendations on redundant connection designs, robust mounting methods, and changes to the safety standards to yield safer PV modules.

  18. Lightweight PV Inverters: Dual Bi-Directional IGBTs Modules Enables Breakthrough PV Inverter Using Current Modulation Topology

    SciTech Connect (OSTI)

    None

    2012-01-30T23:59:59.000Z

    Solar ADEPT Project: PV inverters convert DC power generated by modules into usable AC power. IPC’s initial 30kW 94lb. PV inverter reduces the weight of comparable 30kW PV inverters by 90%—reducing the cost of materials, manufacturing, shipping, and installation. With ARPA-E support, new bi-directional silicon power switches will be developed, commercialized, and utilized in IPC’s next-generation PV inverter. With these components, IPC will produce 100kW inverters that weight less than 100lb., reducing the weight of conventional 3,000lb. 100kW inverters by more than 95%. The new power switches will cut IPC’s $/W manufacturing cost in half, as well as further reduce indirect shipping and installation costs.

  19. Rooftop Solar Potential Distributed Solar Power in NW

    E-Print Network [OSTI]

    1 Rooftop Solar Potential Distributed Solar Power in NW Massoud Jourabchi June 2013 1 Renewables;3 Regional Growth In Solar Energy Consumption Solar consumption both Thermal and PV h b t d i i lhas been on steady increase since early 1990s. From 2000-2010 Solar PV grow at annual rate of 13% and solar thermal

  20. Rooftop Solar Potential Distributed Solar Power in NW

    E-Print Network [OSTI]

    6/19/2013 1 Rooftop Solar Potential Distributed Solar Power in NW Massoud Jourabchi June 2013 1 in 2012 4 #12;6/19/2013 3 Regional Growth In Solar Energy Consumption Solar consumption both Thermal and PV h b t d i i lhas been on steady increase since early 1990s. From 2000-2010 Solar PV grow

  1. Distributed control of reactive power flow in a radial distribution circuit with high photovoltaic penetration

    E-Print Network [OSTI]

    Turitsyn, Konstantin; Backhaus, Scott; Chertkov, Michael

    2009-01-01T23:59:59.000Z

    We show how distributed control of reactive power can serve to regulate voltage and minimize resistive losses in a distribution circuit that includes a significant level of photovoltaic (PV) generation. To demonstrate the technique, we consider a radial distribution circuit with a single branch consisting of sequentially-arranged residential-scale loads that consume both real and reactive power. In parallel, some loads also have PV generation capability. We postulate that the inverters associated with each PV system are also capable of limited reactive power generation or consumption, and we seek to find the optimal dispatch of each inverter's reactive power to both maintain the voltage within an acceptable range and minimize the resistive losses over the entire circuit. We assume the complex impedance of the distribution circuit links and the instantaneous load and PV generation at each load are known. We compare the results of the optimal dispatch with a suboptimal local scheme that does not require any com...

  2. Flat Plate PV Module Eligibility Listing Procedure Updated 6/2/14 Senate Bill 1 (SB1) defines the solar incentive programs for California, and flat plate PV

    E-Print Network [OSTI]

    Flat Plate PV Module Eligibility Listing Procedure Updated 6/2/14 Senate Bill 1 (SB1) defines the solar incentive programs for California, and flat plate PV modules 1 must be listed on the SB1 for adding PV modules to the SB1 list is as follows: 1 . Data submitted to the Energy Commission

  3. Rice Snl6, a cinnamoyl-CoA reductase-like gene family member, is required for NH1-mediated immunity to Xanthomonas oryzae pv. oryzae.

    E-Print Network [OSTI]

    Bart, Rebecca S; Chern, Mawsheng; Vega-Sánchez, Miguel E; Canlas, Patrick; Ronald, Pamela C

    2010-01-01T23:59:59.000Z

    Immunity to Xanthomonas oryzae pv. oryzae Rebecca S. Bartpathogen, Xanthomonas oryzae pv. oryzae (Xoo), constitutiveagainst Xanthomonas oryzae pv. oryzae in Rice. Molecular

  4. The Xanthomonas oryzae pv. oryzae PhoPQ two-component system is required for AvrXA21 activity, hrpG expression, and virulence.

    E-Print Network [OSTI]

    2008-01-01T23:59:59.000Z

    against Xanthomonas oryzae pv. oryzae in Korea. Kor. J.the Xanthomonas campestris pv. campestris lipopolysaccharidein Xanthomonas oryzae pv. oryzae re- quired for AvrXa21

  5. A Distributed Approach to Maximum Power Point Tracking for Photovoltaic Sub-Module Differential

    E-Print Network [OSTI]

    Liberzon, Daniel

    of the proposed distributed algorithm. I. INTRODUCTION IN photovoltaic (PV) energy systems, PV modules are often of the system, small size and low power ratings of the power electronics circuit components. Due1 A Distributed Approach to Maximum Power Point Tracking for Photovoltaic Sub-Module Differential

  6. Sandia National Laboratories: high PV penetration levels

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    SMART Grid, Solar Sandia National Laboratories, the Electric Power Research Institute (EPRI) and European Distributed Energies Research Laboratories (DERlab) have organized a...

  7. Sandia National Laboratories: PV performance model validation

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Solar Newsletter, Systems Analysis Sandians Mathew Lave and Joshua Stein ( both in the Photovoltaics and Distributed Systems Dept.) along with Jan Kleissl (University of...

  8. Sandia National Laboratories: high PV deployment level

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    deployment level ECIS-Princeton Power Systems, Inc.: Demand Response Inverter On March 19, 2013, in DETL, Distribution Grid Integration, Energy, Energy Surety, Facilities, Grid...

  9. Controlling of grid connected photovoltaic lighting system with fuzzy logic

    SciTech Connect (OSTI)

    Saglam, Safak; Ekren, Nazmi; Erdal, Hasan [Technical Education Faculty, Marmara University, Istanbul 34722 (Turkey)

    2010-02-15T23:59:59.000Z

    In this study, DC electrical energy produced by photovoltaic panels is converted to AC electrical energy and an indoor area is illuminated using this energy. System is controlled by fuzzy logic algorithm controller designed with 16 rules. Energy is supplied from accumulator which is charged by photovoltaic panels if its energy would be sufficient otherwise it is supplied from grid. During the 1-week usage period at the semester time, 1.968 kWh energy is used from grid but designed system used 0.542 kWh energy from photovoltaic panels at the experiments. Energy saving is determined by calculations and measurements for one education year period (9 months) 70.848 kWh. (author)

  10. Nevada Deploys Grid-Connected Electricity from Enhanced Geothermal...

    Broader source: Energy.gov (indexed) [DOE]

    Nationwide: Southeast Propane Autogas Development Program Brings 1200 Propane Vehicles to the Road Mississippi's Community Counseling Services converted 29 vans to run on propane,...

  11. Integration Technology for PHEV-Grid-Connectivity, with Support...

    Broader source: Energy.gov (indexed) [DOE]

    using lower cost, secure, universalized wired and wireless communications technologies. (PLC modem, UMAN, zigbee) Produced functional demonstration of 'Software Defined Radio'...

  12. United States Launches First Grid-Connected Offshore Wind Turbine |

    Broader source: Energy.gov (indexed) [DOE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOn AprilA group current C3E AmbassadorsUS-EU-Japan-Japan JointGreen7/053/03 THUl

  13. Transatlantic Workshop on Electric Vehicles and Grid Connectivity |

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What'sis Taking Over OurThe Iron Spin Transition in2, 2003Tool ofTopoCarbon DioxideTrainingEnergy

  14. Public Meeting: Physical Characterization of Grid-Connected Commercial...

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

    and Definitions; Characterization Protocol Framework; Illustrative Example: Room Air Conditioner (RAC); Process for Developing Characterization Protocols; Overview of...

  15. First Commercial, Grid-Connected, Hydrokinetic Tidal Energy Project in

    Office of Science (SC) Website

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What'sis Taking Over OurThe Iron4 Self-Scrubbing:,,of ScienceCurrentEmergencyU.S.U.S. DOEField

  16. Grid-Connected Renewable Energy Systems | Department of Energy

    Office of Environmental Management (EM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613 122Commercial602 1,39732on Armed Services U.S. House ofInvestigations Committee

  17. Public Meeting: Physical Characterization of Grid-Connected Commercial And

    Broader source: Energy.gov (indexed) [DOE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOn April 23, 2014, an OHASeptember 2010 |ofDepartment ofPart 1021 |8-458-DEC. 17,OFFICE

  18. Public Meeting: Physical Characterization of Smart and Grid-Connected

    Broader source: Energy.gov (indexed) [DOE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOn April 23, 2014, an OHASeptember 2010 |ofDepartment ofPart 1021 |8-458-DEC.

  19. Grid-Connected Renewable Energy Systems | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onYouTube YouTube Note: Since the.pdf Flash2006-52.pdf0.pdfDepartmentCounselGlassGreenHunterCommittee

  20. Grid-Connected Renewable Energy Generation Toolkit-Hydroelectric | Open

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are8COaBulkTransmissionSitingProcess.pdfGetec AG ContractingGreenOrderNebraska: EnergyStrategyInformationEnergy

  1. Nevada Deploys Grid-Connected Electricity from Enhanced Geothermal Systems

    Broader source: Energy.gov (indexed) [DOE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China 2015of 2005 attheMohammed Khan -Department ofDepartmentDepartment of Energyto|

  2. United States Launches First Grid-Connected Offshore Wind Turbine |

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onYouTube YouTube Note: SinceDevelopment | Department of Energy $18 MillionPresident Obama's FYofRoadmap to

  3. GROWDERS Demonstration of Grid Connected Electricity Systems (Smart Grid

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are8COaBulkTransmissionSitingProcess.pdf Jump1946865°, -86.0529604°Wisconsin:FyreStormGLOBAL FINANCIALGP

  4. Grid-Connected Renewable Energy Systems Case Studies | Open Energy

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual SiteofEvaluating AGeothermal/ExplorationGoods | OpenInformation BestInformation

  5. PV Module Reliability R&D Project Overview

    SciTech Connect (OSTI)

    Hulstrom, R. L.

    2005-01-01T23:59:59.000Z

    The DOE Solar Energy Technologies Program includes a sub-key activity entitled ''Photovoltaic Module Reliability R&D''. This activity has been in existence for several years to help ensure that the PV technologies that advance to the commercial module stage have acceptable service lifetimes and annual performance degradation rates. The long-term (2020) goal, as stated in the Solar Program Multi-Year Technical Plan [1], is to assist industry with the development of PV systems that have 30-year service lifetimes and 1% annual performance degradation rates. The corresponding module service lifetimes and annual performance degradation rate would have to be 30 years lifetime and approximately 0.5% (or less, depending on the type of PV system) annual performance degradation. Reaching this goal is critical to achieving the PV technology Levelized Energy Cost Targets, as listed and described in the Solar Program Multi-Year Technical Plan. This paper is an overview of the Module Reliability R&D sub-key activity. More details and the major results and accomplishments are covered in the papers presented in the PV Module Reliability Session of the DOE Solar Energy Technology Review Meeting, October 25-28, 2004, in Denver, Colorado.

  6. PV Cell and Module Calibration Activities at NREL

    SciTech Connect (OSTI)

    Emery, K.; Anderberg, A.; Kiehl, J.; Mack, C.; Moriarty, T.; Ottoson, L.; Rummel, S.

    2005-11-01T23:59:59.000Z

    The performance of PV cells and modules with respect to standard reference conditions is a key indicator of progress of a given technology. This task provides the U.S. terrestrial PV community with the most accurate measurements that are technically possible in a timely fashion. The international module certification and accreditation program PVGap requires certification laboratories to maintain their calibration traceability path to groups like this one. The politics of a "world record" efficiency requires that an independent laboratory perform these measurements for credibility. Most manufacturers base their module peak watt rating upon standards and reference cells calibrated under this task. This task has been involved in reconciling disputes between manufacturers and their cell suppliers in terms of expected versus actual performance. This task has also served as a resource to the PV community for consultation on solar simulation, current versus voltage measurement instrumentation, measurement procedures and measurement artifacts.

  7. Metabolomic and transcriptomic analysis of the rice response to the bacterial blight pathogen Xanthomonas oryzae pv. oryzae

    E-Print Network [OSTI]

    2010-01-01T23:59:59.000Z

    system in Xanthomonas oryzae pv. oryzae required for AvrXa212002). The Xanthomonas oryzae pv. lozengeoryzae raxP andPf1 against Xanthomo- nas oryzae pv. oryzae in rice leaves.

  8. Encouraging PV Adoption in New Market-Rate Residential Construction: A Critical Review of Program Experiences to Date

    E-Print Network [OSTI]

    Barbose, Galen; Wiser, Ryan; Bolinger, Mark

    2006-01-01T23:59:59.000Z

    ENCOURAGING PV ADOPTION IN NEW MARKET-RATE RESIDENTIALdeployment of photovoltaics (PV) in new, market-rate homes,the new home market for PV. feature in new developments

  9. Metabolomic and transcriptomic analysis of the rice response to the bacterial blight pathogen Xanthomonas oryzae pv. oryzae.

    E-Print Network [OSTI]

    2010-01-01T23:59:59.000Z

    system in Xanthomonas oryzae pv. oryzae required for AvrXa212002). The Xanthomonas oryzae pv. lozengeoryzae raxP andPf1 against Xanthomo- nas oryzae pv. oryzae in rice leaves.

  10. Marker-exchange mutagenesis and complementation strategies for the Gram-negative bacteria Xanthomonas oryzae pv. oryzae.

    E-Print Network [OSTI]

    Lee, Sang-Won; Ronald, P C

    2006-01-01T23:59:59.000Z

    of a Xanthomonas oryzae pv. oryzae flagellar operon region2002) The Xanthomonas oryzae pv. lozengeoryzae raxP and raxQsystem in xanthomonas oryzae pv. oryzae required for AvrXa21

  11. Designing PV Incentive Programs to Promote Performance: A Review of Current Practice in the U.S.

    E-Print Network [OSTI]

    Barbose, Galen; Wiser, Ryan; Bolinger, Mark

    2008-01-01T23:59:59.000Z

    systems: UL-1703 for PV modules and UL- 1741 for inverters andinverters). PV program administrators have sought to weed out poorly-designed systemsPV system at a discounted price. Efficiency rating for each inverter

  12. Designing PV Incentive Programs to Promote Performance: A Review of Current Practice in the U.S.

    E-Print Network [OSTI]

    Barbose, Galen; Wiser, Ryan; Bolinger, Mark

    2008-01-01T23:59:59.000Z

    manufacturers of PV modules and inverters are to determineUL-1703 for PV modules and UL- 1741 for inverters and otherand the sizing of the inverters). PV program administrators

  13. artificial techniques controlling: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    photovoltaic systems with multimodal power curves-phased grid- connected photovoltaic (PV) arrays which have to provide maximum power irrespective of solar systems while the...

  14. Soiling losses for solar photovoltaic systems in California

    E-Print Network [OSTI]

    Mejia, Felipe A; Kleissl, Jan

    2013-01-01T23:59:59.000Z

    on Large Grid-Connected Photovoltaic Systems in Californiaof Dust on Solar Photovoltaic (PV) Performance: Researchclimatology in design of photovoltaic systems. In: Markvart

  15. Toward integrated PV panels and power electronics using printing technologies

    SciTech Connect (OSTI)

    Ababei, Cristinel; Yuvarajan, Subbaraya [Electrical and Computer Engineering Department, North Dakota State University, Fargo, ND 58108 (United States); Schulz, Douglas L. [Center for Nanoscale Science and Engineering, North Dakota State University, Fargo, ND 58102 (United States)

    2010-07-15T23:59:59.000Z

    In this paper, we review the latest developments in the area of printing technologies with an emphasis on the fabrication of control-embedded photovoltaics (PV) with on-board active and passive devices. We also review the use of power converters and maximum power point tracking (MPPT) circuits with PV panels. Our focus is on the investigation of the simplest implementations of such circuits in view of their integration with solar cells using printing technologies. We see this concept as potentially enabling toward further cost reduction. Besides a discussion as to feasibility, we shall also present some projections and guidelines toward possible integration. (author)

  16. Outdoor PV Module Degradation of Current-Voltage Parameters: Preprint

    SciTech Connect (OSTI)

    Smith, R. M.; Jordan, D. C.; Kurtz, S. R.

    2012-04-01T23:59:59.000Z

    Photovoltaic (PV) module degradation rate analysis quantifies the loss of PV power output over time and is useful for estimating the impact of degradation on the cost of energy. An understanding of the degradation of all current-voltage (I-V) parameters helps to determine the cause of the degradation and also gives useful information for the design of the system. This study reports on data collected from 12 distinct mono- and poly-crystalline modules deployed at the National Renewable Energy Laboratory (NREL) in Golden, Colorado. Most modules investigated showed < 0.5%/year decrease in maximum power due to short-circuit current decline.

  17. Testing of Packaging Materials for Improved PV Module Reliability

    SciTech Connect (OSTI)

    Jorgensen, G. J.; Terwilliger, K. M.; Kempe, M. D.; McMahon, T. J.

    2005-02-01T23:59:59.000Z

    A number of candidate alternative encapsulant and soft backsheet materials have been evaluated in terms of their suitability for photovoltaic (PV) module packaging applications. Relevant properties, including interfacial adhesion and moisture transport, have been measured as a function of damp-heat (85 C/85% relative humidity) exposure. Based on these tests, promising new encapsulants with improved properties have been identified. Backsheets prepared by industry and at NREL have been found to provide varying levels of moisture ingress protection. To achieve significantly improved products, further development of these candidates is ongoing. The relative effectiveness of various packaging strategies to protect PV devices has also been investigated.

  18. Amp-hour counting control for PV hybrid power systems

    SciTech Connect (OSTI)

    Hund, T.D. [Sandia National Labs., Albuquerque, NM (United States); Thompson, B. [Biri Systems, Ithaca, NY (United States)

    1997-06-01T23:59:59.000Z

    The performance of an amp-hour (Ah) counting battery charge control algorithm has been defined and tested using the Digital Solar Technologies MPR-9400 microprocessor based PV hybrid charge controller. This work included extensive field testing of the charge algorithm on flooded lead-antimony and valve regulated lead-acid (VRLA) batteries. The test results after one-year have demonstrated that PV charge utilization, battery charge control, and battery state of charge (SOC) has been significantly improved by providing maximum charge to the batteries while limiting battery overcharge to manufacturers specifications during variable solar resource and load periods.

  19. Transcriptional regulation of seed-specific gene expression - from PvALF/ ABI3 to phaseolin

    E-Print Network [OSTI]

    Ng, Wang Kit

    2006-10-30T23:59:59.000Z

    the inactive state in transgenic Arabidopsis leaves was accomplished by ectopic expression of the transcription factor PvALF (Phaseolus vulgaris ABI3-like factor), and application of abscisic acid (ABA). PvALF belongs to a family of seed...

  20. Designing PV Incentive Programs to Promote System Performance: A Review of Current Practice

    E-Print Network [OSTI]

    Barbose, Galen; Wiser, Ryan; Bolinger, Mark

    2006-01-01T23:59:59.000Z

    2006. Celentano, Ron. 2005. “SDF Solar PV Grant Program inSustainable Development Fund (SDF) Rhode Island RenewableOH – DOD OR – ETO PA – SDF RI – RIREF Small PV Program RI –

  1. Interline photovoltaic (I-PV) power plants for voltage unbalance compensation

    E-Print Network [OSTI]

    Moawwad, Ahmed

    This paper proposes a stationary-frame control method for voltage unbalance compensation using Interline Photovoltaic (I-PV) power system. I-PV power systems are controlled to compensate voltage unbalance autonomously. The ...

  2. Delamination Failures in Long-Term Field Aged PV Modules from...

    Office of Environmental Management (EM)

    Delamination Failures in Long-Term Field Aged PV Modules from Point of View of Encapsulant Delamination Failures in Long-Term Field Aged PV Modules from Point of View of...

  3. Integration of Behind-the-Meter PV Fleet Forecasts into Utility...

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

    Integration of Behind-the-Meter PV Fleet Forecasts into Utility Grid System Operations Integration of Behind-the-Meter PV Fleet Forecasts into Utility Grid System Operations Clean...

  4. Climatically Diverse Data Set for Flat-Plate PV Module Model Validations (Presentation)

    SciTech Connect (OSTI)

    Marion, B.

    2013-05-01T23:59:59.000Z

    Photovoltaic (PV) module I-V curves were measured at Florida, Colorado, and Oregon locations to provide data for the validation and development of models used for predicting the performance of PV modules.

  5. ELEG620: Solar Electric Systems University of Delaware, ECE Spring 2008 C. Honsberg PV System Components

    E-Print Network [OSTI]

    Honsberg, Christiana

    · Batteries required if (1) load profile solar radiation profile and (2) to mitigate effect of variability · PV System components: ­ PV Modules ­ Batteries ­ Power Conditioning ­ Loads ­ Balance of systems #12

  6. Energy and Society (ER100/PP184/ER200/PP284) Topics: PV, Wind, environmental justice

    E-Print Network [OSTI]

    Kammen, Daniel M.

    Energy and Society (ER100/PP184/ER200/PP284) Topics: PV, Wind, environmental justice Due Nov. 21) Topics: PV, Wind, environmental justice Due Nov. 21, in class, or before 5pm outside 310 Barrows Fall

  7. Berkeley Program Offers New Option for Financing Residential PV Systems

    SciTech Connect (OSTI)

    Bolinger, Mark A

    2008-07-06T23:59:59.000Z

    Readily accessible credit has often been cited as a necessary ingredient to open up the market for residential photovoltaic (PV) systems. Though financing does not reduce the high up-front cost of PV, by spreading that cost over some portion of the system's life, financing can certainly make PV systems more affordable. As a result, a number of states have, in the past, set up special residential loan programs targeting the installation of renewable energy systems and/or energy-efficiency improvements and often featuring low interest rates, longer terms and no-hassle application requirements. Historically, these loan programs have had mixed success (particularly for PV), for a variety of reasons, including a historical lack of homeowner interest in PV, a lack of program awareness, a reduced appeal in a low-interest-rate environment, and a tendency for early PV adopters to be wealthy and not in need of financing. Some of these barriers have begun to fade. Most notably, homeowner interest in PV has grown in some states, particularly those that offer solar rebates. The passage of the Energy Policy Act of 2005 (EPAct 2005), however, introduced one additional roadblock to the success of low-interest PV loan programs: a residential solar investment tax credit (ITC), subject to the Federal government's 'anti-double-dipping' rules. Specifically, the residential solar ITC--equal to 30% of the system's tax basis, capped at $2000--will be reduced or offset if the system also benefits from what is known as 'subsidized energy financing', which is likely to include most government-sponsored low-interest loan programs. Within this context, it has been interesting to note the recent flurry of announcements from a number of U.S cities concerning a new type of PV financing program. Led by the city of Berkeley, Calif., these cities propose to offer their residents the ability to finance the installation of a PV system using increased property tax assessments, rather than a more-traditional credit vehicle, to recover both system and administrative costs. This approach has a number of features that should appeal to PV owners, including long-term, fixed-cost, attractive financing; loans that are tied to the tax capacity of the property rather than to the owner's credit standing; a repayment obligation that transfers along with the sale of the property; and a potential ability to deduct the repayment obligation from federal taxable income as part of the local property tax deduction. For these reasons, Berkeley's program, which was first announced on October 23, 2007, has received considerable nationwide attention in both the trade and general press. Since the announcement, cities from throughout California and the broader U.S. have expressed keen interest in the possibility of replicating this type of program. In California alone, the cities of Santa Cruz, Santa Monica and Palm Desert are all reportedly considering similar programs, while the city of San Francisco has recently announced its own program, portions of which closely parallel Berkeley's approach. In addition, a bill (AB 811) that would authorize all cities in California, not just charter cities like Berkeley, to create this type of program was approved by the California General Assembly on January 29 and is currently under consideration in the State Senate. A similar bill in Colorado (HB 1350) was signed into law on May 28. Elsewhere, the city of Tucson, Arizona has also considered this financing approach.

  8. Modular Power Converters for PV Applications

    SciTech Connect (OSTI)

    Ozpineci, Burak [ORNL; Tolbert, Leon M [ORNL

    2012-05-01T23:59:59.000Z

    This report describes technical opportunities to serve as parts of a technological roadmap for Shoals Technologies Group in power electronics for PV applications. There are many different power converter circuits that can be used for solar inverter applications. The present applications do not take advantage of the potential for using common modules. We envision that the development of a power electronics module could enable higher reliability by being durable and flexible. Modules would have fault current limiting features and detection circuits such that they can limit the current through the module from external faults and can identify and isolate internal faults such that the remaining modules can continue to operate with only minimal disturbance to the utility or customer. Development of a reliable, efficient, low-cost, power electronics module will be a key enabling technology for harnessing more power from solar panels and enable plug and play operation. Power electronics for computer power supplies, communication equipment, and transportation have all targeted reliability and modularity as key requirements and have begun concerted efforts to replace monolithic components with collections of common smart modules. This is happening on several levels including (1) device level with intelligent control, (2) functional module level, and (3) system module. This same effort is needed in power electronics for solar applications. Development of modular units will result in standard power electronic converters that will have a lower installed and operating cost for the overall system. These units will lead to increased adaptability and flexibility of solar inverters. Incorporating autonomous fault current limiting and reconfiguration capabilities into the modules and having redundant modules will lead to a durable converter that can withstand the rigors of solar power generation for more than 30 years. Our vision for the technology roadmap is that there is no need for detailed design of new power converters for each new application or installation. One set of modules and controllers can be pre-developed and the only design question would be how many modules need to be in series or parallel for the specific power requirement. Then, a designer can put the modules together and add the intelligent reconfigurable controller. The controller determines how many modules are connected, but it might also ask for user input for the specific application during setup. The modules include protection against faults and can reset it, if necessary. In case of a power device failure, the controller reconfigures itself to continue limited operation until repair which might be as simple as taking the faulty module out and inserting a new module. The result is cost savings in design, maintenance, repair, and a grid that is more reliable and available. This concept would be a perfect fit for the recently announced funding opportunity announcement (DE-FOA-0000653) on Plug and Play Photovoltaics.

  9. Rethinking Standby & Fixed Cost Charges: Regulatory & Rate Design Pathways to Deeper Solar PV Cost Reductions

    Broader source: Energy.gov [DOE]

    While solar PV's impact on utilities has been frequently discussed the past year, little attention has been paid to the potentially impact posed by solar PV-specific rate designs (often informally referred to as solar "fees" or "taxes") upon non-hardware "soft" cost reductions. In fact, applying some rate designs to solar PV customers could potentially have a large impact on the economics of PV systems.

  10. U.S. Aims for Zero-Energy: Support for PV on New Homes

    E-Print Network [OSTI]

    Barbose, Galen; Wiser, Ryan; Bolinger, Mark

    2006-01-01T23:59:59.000Z

    PV in new homes, dubbed the Solar Advantage Homes Program, through which SMUD purchased BIPV systems and inverters

  11. Distributed Resource Energy Analysis and Management System (DREAMS...

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

    distributed roof-top PV resources and factor advanced 15-minute short term wind and solar forecasting capability for the region into the EMS decision-making process. This...

  12. Impact of SolarSmart Subdivisions on SMUD's Distribution System

    SciTech Connect (OSTI)

    McNutt, P.; Hambrick, J.; Keesee, M.; Brown, D.

    2009-07-01T23:59:59.000Z

    This study analyzes the distribution impacts of high penetrations of grid-integrated renewable energy systems, specifically photovoltaic (PV) equipped SolarSmart Homes found in the Anatolia III Residential Community.

  13. THE DEVELOPMENT AND COMMERCIALIZATION OF SOLAR PV TECHNOLOGY IN THE OIL Jonatan Pinksea,b

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    THE DEVELOPMENT AND COMMERCIALIZATION OF SOLAR PV TECHNOLOGY IN THE OIL INDUSTRY Jonatan Pinksea regarding solar PV technology investments, a renewable energy technology that has seen explosive growth towards the development and commercialization of solar PV technology. To investigate this, a multiple case

  14. Response to Xanthomonas campestris pv. vesicatoria in Tomato Involves Regulation of Ethylene Receptor

    E-Print Network [OSTI]

    Klee, Harry J.

    Response to Xanthomonas campestris pv. vesicatoria in Tomato Involves Regulation of Ethylene ethylene's role in plant response to virulent and avirulent strains of Xanthomonas campestris pv overexpressing a wild-type NR cDNA were infected with virulent X. campestris pv. vesicatoria. Like the Nr mutant

  15. Put-Call Parity (Castelli, 1877) C = P + S -PV(X). (19)

    E-Print Network [OSTI]

    Lyuu, Yuh-Dauh

    Put-Call Parity (Castelli, 1877) C = P + S - PV(X). (19) · Consider the portfolio of one short European call, one long European put, one share of stock, and a loan of PV(X). · All options are assumed - S + PV(X). c 2010 Prof. Yuh-Dauh Lyuu, National Taiwan University Page 185 #12;The Proof (continued

  16. The figure shows the current energy pay back time for PV

    E-Print Network [OSTI]

    The figure shows the current energy pay back time for PV systems using different cell technologies and installed either in Central Europe or Southern Europe. Argument B1 PV Fact Sheets Technology improvements: Manufacturing a PV system consumes more energy than it ever produces in its life time." The fact is

  17. Design and Evaluation of a Modular Resonant Switched Capacitors Equalizer for PV Panels

    E-Print Network [OSTI]

    Design and Evaluation of a Modular Resonant Switched Capacitors Equalizer for PV Panels Shmuel (Sam of shaded panels in a serially connected PV array. The proposed solution is based on a modular approach module was designed for 185W PV panels and was found to boost the maximum available power by about 50

  18. agronomie: agriculture and environment Dtection d'Erwinia chrysanthemi pv dianthicola

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    agronomie: agriculture and environment Détection d'Erwinia chrysanthemi pv dianthicola par le test — L'indexage des boutures d'śillet vis-ŕ-vis d'Erwinia chrysanthemi pv dianthicola (Ech son exploitation ŕ grande échelle sont discutés sur le plan technique. Erwinia chrysanthemi pv

  19. VALIDATION OF PV PERFORMANCE MODELS USING SATELLITE-BASED IRRADIANCE MEASUREMENTS: A CASE STUDY

    E-Print Network [OSTI]

    Perez, Richard R.

    VALIDATION OF PV PERFORMANCE MODELS USING SATELLITE-BASED IRRADIANCE MEASUREMENTS: A CASE STUDY Clean Power Research Kirkland, WA e-mail: aparkins@cleanpower.com ABSTRACT Photovoltaic (PV) system and existing PV systems under a wide variety of environmental conditions. Ground based meteorological

  20. Chapter 6: Innovation-Focused Policy Framework for TW-Scale PV Deployment

    E-Print Network [OSTI]

    Kammen, Daniel M.

    1 Chapter 6: Innovation-Focused Policy Framework for TW-Scale PV Deployment 6.1. Demand, and installation, which all have one common goal: to reduce the cost of PV technology and make it an affordable & development (R&D). These policy instruments in the PV sector can be broadly categorized into two approaches

  1. Genomic Plasticity Enables Phenotypic Variation of Pseudomonas syringae pv. tomato DC3000

    E-Print Network [OSTI]

    Myers, Chris

    Genomic Plasticity Enables Phenotypic Variation of Pseudomonas syringae pv. tomato DC3000 Zhongmeng of a genomic anomaly in the region of 4.7 to 4.9 Mb of the Pseudomonas syringae pv. tomato (Pst) DC3000 genome in P. syringae. Citation: Bao Z, Stodghill PV, Myers CR, Lam H, Wei H-L, et al. (2014) Genomic

  2. Genome-Wide Identification of Transcriptional Start Sites in the Plant Pathogen Pseudomonas syringae pv. tomato

    E-Print Network [OSTI]

    Myers, Chris

    syringae pv. tomato str. DC3000 Melanie J. Filiatrault1,2 *, Paul V. Stodghill1,2 , Christopher R. Myers3 identified 59-ends of transcripts for the plant pathogen Pseudomonas syringae pv. tomato str. DC3000. Citation: Filiatrault MJ, Stodghill PV, Myers CR, Bronstein PA, Butcher BG, et al. (2011) Genome

  3. Evidence for Interhemispheric Processing of Inputs From the Hands in Human S2 and PV

    E-Print Network [OSTI]

    Krubitzer, Leah A.

    Evidence for Interhemispheric Processing of Inputs From the Hands in Human S2 and PV ELIZABETH S2 and PV. J Neurophysiol 85: 2236­2244, 2001. In the present investigation, we identified cortical somatosensory (S2) and the parietal ventral (PV) areas, was significantly larger for bilateral stimulation than

  4. PUBLISHED VERSION Workshop on performance variations in H ion sources 2012: PV H12

    E-Print Network [OSTI]

    PUBLISHED VERSION Workshop on performance variations in H ion sources 2012: PV H12 M. P. Stockli, D://dx.doi.org/10.1063/1.4792832 #12;Workshop on performance variations in H ion sources 2012: PV H12 M. P. Stockli Sources 2012: PV H- 120F * M. P. Stocklia , D. Fairclothb , W. Krausc , A. Andod , D. S. Bollingere , S

  5. OPTIMIZATION WITH ENERGY MANAGEMENT OF PV BATTERY STAND-ALONE SYSTEMS OVER THE ENTIRE LIFE CYCLE

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    of both the installed PV power and storage capacity (lead-acid battery technology for purposes). Keywords: Battery storage and control, Lifetime simulation, PV system. 1. INTRODUCTION Given the sizableOPTIMIZATION WITH ENERGY MANAGEMENT OF PV BATTERY STAND-ALONE SYSTEMS OVER THE ENTIRE LIFE CYCLE

  6. 78 IAEI NEWS September.October 2006 www.iaei.org penetrating pv questions from inspectors

    E-Print Network [OSTI]

    Johnson, Eric E.

    78 IAEI NEWS September.October 2006 www.iaei.org penetrating pv questions from inspectors B ased several calls and e-mails a week and sometimes several calls a day from inspectors looking at PV plans or inspecting PV systems. The questions that they pose are always challenging because most of the inspectors

  7. Optimal Perturbations in the Eady Model: Resonance versus PV Unshielding H. DE VRIES

    E-Print Network [OSTI]

    de Vries, Hylke

    Optimal Perturbations in the Eady Model: Resonance versus PV Unshielding H. DE VRIES Institute August 2004) ABSTRACT Using a nonmodal decomposition technique based on the potential vorticity (PV, such that the initial surface potential temperature (PT) is zero. These nonmodal structures are used as PV building

  8. 16 IAEI NEWS September . October 2010 www.iaei.org prospectives on pv

    E-Print Network [OSTI]

    Johnson, Eric E.

    restrictions. In utility-interactive PV systems, the inverter can be greatly simplified to a conceptual system are ungrounded, the PV utili- ty-interactive inverter can be relatively simple compared to what16 IAEI NEWS September . October 2010 www.iaei.org prospectives on pv Ungrounded Electrical Systems

  9. Hawaii Natural Energy Institute installs PV systems at public schools Pacific Business News

    E-Print Network [OSTI]

    the performance of traditional and emerging PV materials and inverter technologies," Institute Director Richard of the inverters, which convert direct current or DC power generated by the PV panels into alternating currentHawaii Natural Energy Institute installs PV systems at public schools Pacific Business News

  10. Impact of increased penetration of wind and PV solar resources on the

    E-Print Network [OSTI]

    to the BES through a power electronic inverter · Residential roof top PV solar also has an inverter whichImpact of increased penetration of wind and PV solar resources on the bulk power system Vijay;Wind and PV solar grid interface · Modern wind turbine generators are typically rated between 1.5 MW

  11. 80 IAEI NEWS March.April 2008 www.iaei.org COMMON PV CODE VIOLATIONS

    E-Print Network [OSTI]

    Johnson, Eric E.

    into 2008, the PV industry continues to grow by leaps and bounds. New module and inverter manufacturers of un- grounded PV arrays (see 690.35) that will be used with transformerless inverters, and those80 IAEI NEWS March.April 2008 www.iaei.org COMMON PV CODE VIOLATIONS by John Wiles A s we move

  12. Remote and Centralized Monitoring of PV Power Csaba Kopacz, Sergiu Spataru, Dezso Sera, and Tamas Kerekes

    E-Print Network [OSTI]

    Sera, Dezso

    curve measurements from the inverters within each PV plant. The monitoring software stores the PVRemote and Centralized Monitoring of PV Power Plants Csaba Kopacz, Sergiu Spataru, Dezso Sera-cost and flexible monitoring system for PV plants. Compared to classical solutions which can require dedicated

  13. 2 IAEI NEWS January.February 2005 www.iaei.org PERSPECTIVES ON PV

    E-Print Network [OSTI]

    Johnson, Eric E.

    to ease installation and are used in PV systems for battery cables, power conductors to large utility2 IAEI NEWS January.February 2005 www.iaei.org PERSPECTIVES ON PV T he use of fine stranded" industries like the photovoltaic (PV) industry, the fuel cell indus- try, and the uninterruptible power

  14. Keywords: Photovoltaic System, fault-tolerance, recon-figurable PV panel

    E-Print Network [OSTI]

    Pedram, Massoud

    plants, and satellites. The output power of a PV cell (also called solar cell) is dependent on the solar: naehyuck@elpl.snu.ac.kr). output power of a PV cell increases as solar irradiance increases and temperature irradiance level and temperature. Figure 1 shows PV cell output current-voltage and power

  15. EPJ Photovoltaics 2, 20301 (2011) www.epj-pv.org

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    2011-01-01T23:59:59.000Z

    EPJ Photovoltaics 2, 20301 (2011) www.epj-pv.org DOI: 10.1051/epjpv/2011001 c Owned by the authors, published by EDP Sciences, 2011 EPJ PhotovoltaicsEPJ Photovoltaics Geometrical optimization and electrical online: 1 April 2011 Abstract This article investigates the optimal efficiency of a photovoltaic system

  16. Utility Scale Solar PV Cost Steven SimmonsSteven Simmons

    E-Print Network [OSTI]

    Nuclear Generating Station. 4 #12;6/19/2013 3 EVEN MORE SUNNY HEADLINES New solar panels glisten6/19/2013 1 Utility Scale Solar PV Cost Steven SimmonsSteven Simmons Northwest Power Cost Forecast 5. Levelized Costs 1 SOLAR POWER SYSTEM HAS BRIGHT FUTURE 1. Modest environmental impacts

  17. Results from measurements on the PV-VENT systems

    E-Print Network [OSTI]

    effi- cient PV-ventilation in retrofit housing", contract no. JOR3-CT97-0160 and partly by the Danish Řstergaard Jensen. M.Sc., Solar Energy Centre Denmark Hossein Gohari, B.Sc., Heating Technology, Danish.Sc., Ventilation and Environment. Technological Institute of Denmark Anne Rasmussen, M.Sc., Cenergia Energy

  18. Opportunities and Challenges for Power Electronics in PV Modules (Presentation)

    SciTech Connect (OSTI)

    Kurtz, S.; Deline, C.; Wohlgemuth, J.; Marion, B.; Granata, J.

    2011-02-01T23:59:59.000Z

    The presentation describes the value of adding DC converters and other power electronics to modules to improve their output even when shading or bad cells would otherwise decrease the module output. The presentation was part of a workshop sponsored by ARPA-E exploring the opportunities for power electronics to support PV applications.

  19. Silicon Oxynitride Thin Film Barriers for PV Packaging (Poster)

    SciTech Connect (OSTI)

    del Cueto, J. A.; Glick, S. H.; Terwilliger, K. M.; Jorgensen, G. J.; Pankow, J. W.; Keyes, B. M.; Gedvilas, L. M.; Pern, F. J.

    2006-10-03T23:59:59.000Z

    Dielectric, adhesion-promoting, moisture barriers comprised of silicon oxynitride thin film materials (SiOxNy with various material stoichiometric compositions x,y) were applied to: 1) bare and pre-coated soda-lime silicate glass (coated with transparent conductive oxide SnO2:F and/or aluminum), and polymer substrates (polyethylene terephthalate, PET, or polyethylene napthalate, PEN); plus 2) pre- deposited photovoltaic (PV) cells and mini-modules consisting of amorphous silicon (a-Si) and copper indium gallium diselenide (CIGS) thin-film PV technologies. We used plasma enhanced chemical vapor deposition (PECVD) process with dilute silane, nitrogen, and nitrous oxide/oxygen gas mixtures in a low-power (< or = 10 milliW per cm2) RF discharge at ~ 0.2 Torr pressure, and low substrate temperatures < or = 100(degrees)C, over deposition areas ~ 1000 cm2. Barrier properties of the resulting PV cells and coated-glass packaging structures were studied with subsequent stressing in damp-heat exposure at 85(degrees)C/85% RH. Preliminary results on PV cells and coated glass indicate the palpable benefits of the barriers in mitigating moisture intrusion and degradation of the underlying structures using SiOxNy coatings with thicknesses in the range of 100-200 nm.

  20. VALIDATION OF A SIMPLIFIED PV SIMULATION ENGINE Richard Perez

    E-Print Network [OSTI]

    Perez, Richard R.

    (BOS) parameters. The flow chart in Fig. 1 illustrates input and output flows in a program. The flow chart in Fig. 2 illustrates the modeling approach used in CPE. The calculation of PV output: this is done by estimating reflected energy, Qr(h,m), from the horizontal reference table, Qh(h,m) using