Sample records for grid maturity model

  1. Smart Grid Interoperability Maturity Model

    SciTech Connect (OSTI)

    Widergren, Steven E.; Levinson, Alex; Mater, J.; Drummond, R.

    2010-04-28T23:59:59.000Z

    The integration of automation associated with electricity resources (including transmission and distribution automation and demand-side resources operated by end-users) is key to supporting greater efficiencies and incorporating variable renewable resources and electric vehicles into the power system. The integration problems faced by this community are analogous to those faced in the health industry, emergency services, and other complex communities with many stakeholders. To highlight this issue and encourage communication and the development of a smart grid interoperability community, the GridWise Architecture Council (GWAC) created an Interoperability Context-Setting Framework. This "conceptual model" has been helpful to explain the importance of organizational alignment in addition to technical and informational interface specifications for "smart grid" devices and systems. As a next step to building a community sensitive to interoperability, the GWAC is investigating an interoperability maturity model (IMM) based on work done by others to address similar circumstances. The objective is to create a tool or set of tools that encourages a culture of interoperability in this emerging community. The tools would measure status and progress, analyze gaps, and prioritize efforts to improve the situation.

  2. Maturity Model for Advancing Smart Grid Interoperability

    SciTech Connect (OSTI)

    Knight, Mark; Widergren, Steven E.; Mater, J.; Montgomery, Austin

    2013-10-28T23:59:59.000Z

    Abstract—Interoperability is about the properties of devices and systems to connect and work properly. Advancing interoperability eases integration and maintenance of the resulting interconnection. This leads to faster integration, lower labor and component costs, predictability of projects and the resulting performance, and evolutionary paths for upgrade. When specifications are shared and standardized, competition and novel solutions can bring new value streams to the community of stakeholders involved. Advancing interoperability involves reaching agreement for how things join at their interfaces. The quality of the agreements and the alignment of parties involved in the agreement present challenges that are best met with process improvement techniques. The GridWise® Architecture Council (GWAC) sponsored by the United States Department of Energy is supporting an effort to use concepts from capability maturity models used in the software industry to advance interoperability of smart grid technology. An interoperability maturity model has been drafted and experience is being gained through trials on various types of projects and community efforts. This paper describes the value and objectives of maturity models, the nature of the interoperability maturity model and how it compares with other maturity models, and experiences gained with its use.

  3. Smart Grid Interoperability Maturity Model Beta Version

    SciTech Connect (OSTI)

    Widergren, Steven E.; Drummond, R.; Giroti, Tony; Houseman, Doug; Knight, Mark; Levinson, Alex; longcore, Wayne; Lowe, Randy; Mater, J.; Oliver, Terry V.; Slack, Phil; Tolk, Andreas; Montgomery, Austin

    2011-12-02T23:59:59.000Z

    The GridWise Architecture Council was formed by the U.S. Department of Energy to promote and enable interoperability among the many entities that interact with the electric power system. This balanced team of industry representatives proposes principles for the development of interoperability concepts and standards. The Council provides industry guidance and tools that make it an available resource for smart grid implementations. In the spirit of advancing interoperability of an ecosystem of smart grid devices and systems, this document presents a model for evaluating the maturity of the artifacts and processes that specify the agreement of parties to collaborate across an information exchange interface. You are expected to have a solid understanding of large, complex system integration concepts and experience in dealing with software component interoperation. Those without this technical background should read the Executive Summary for a description of the purpose and contents of the document. Other documents, such as checklists, guides, and whitepapers, exist for targeted purposes and audiences. Please see the www.gridwiseac.org website for more products of the Council that may be of interest to you.

  4. DOE Releases Maturity Model to Better Protect the Nation's Grid...

    Office of Environmental Management (EM)

    the Nation's Grid from Cybersecurity Threats May 31, 2012 - 4:32pm Addthis The Electricity Subsector Cybersecurity Capability Maturity Model, which allows electric utilities...

  5. Electricity Subsector Cybersecurity Capability Maturity Model...

    Energy Savers [EERE]

    Electricity Subsector Cybersecurity Capability Maturity Model (ES-C2M2) Electricity Subsector Cybersecurity Capability Maturity Model (ES-C2M2) Electricity Subsector Cybersecurity...

  6. Electricity Subsector Cybersecurity Capability Maturity Model...

    Office of Environmental Management (EM)

    Electricity Subsector Cybersecurity Capability Maturity Model v. 1.1. (February 2014) Electricity Subsector Cybersecurity Capability Maturity Model v. 1.1. (February 2014) The...

  7. Networks, smart grids: new model for synchronization

    E-Print Network [OSTI]

    - 1 - Networks, smart grids: new model for synchronization May 21, 2013 Networks of individual scenarios and in smart grid applications. "Smart grid" refers to technology to modernize utility electricity in a volatile smart grid scenario that included fluctuating loads with random power demand, renewable energy

  8. EconoGrid: A detailed Simulation Model of a Standards-based Grid Compute Economy

    E-Print Network [OSTI]

    EconoGrid: A detailed Simulation Model of a Standards-based Grid Compute Economy EconoGrid is a detailed simulation model, implemented in SLX1 , of a grid compute economy that implements selected of users. In a grid compute economy, computing resources are sold to users in a market where price

  9. 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

  10. Stretched-Grid Model Intercomparison Project

    E-Print Network [OSTI]

    Gruner, Daniel S.

    - Land-sea differences - Surface parameters Applications (besides regional climate variability and change, Russia #12;OUTLINE 1. INTRODUCTION: Exploring the variable- resolution stretched-grid approach (for grid- point models: Staniforth and Mitchell 1978, and for spectral models: Schmidt 1977) to regional climate

  11. Cybersecurity Capability Maturity Model - Facilitator Guide ...

    Office of Environmental Management (EM)

    of the nation's electric grid and reducing the risk of energy disruptions due to cyber attack, visit the Cybersecurity page. C2M2 Facilitator Guide (February 2014) More Documents &...

  12. Electricity Subsector Cybersecurity Capability Maturity Model...

    Energy Savers [EERE]

    of the nation's electric grid and reducing the risk of energy disruptions due to cyber attack, visit the Cybersecurity page. Electricity Subsector C2M2 v1.1 (February 2014) More...

  13. Cybersecurity Capability Maturity Model - Frequently Asked Questions...

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

    of the nation's electric grid and reducing the risk of energy disruptions due to cyber attack, visit the Cybersecurity page. C2M2 Frequently Asked Questions More Documents &...

  14. Smart Grid Technology Interactive Model | Argonne National Laboratory

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

    Smart Grid Technology Interactive Model Share Description As our attention turns to new cars that run partially or completely on electricity, how can we redesign our electric grid...

  15. Demonstrating the improvement of predictive maturity of a computational model

    SciTech Connect (OSTI)

    Hemez, Francois M [Los Alamos National Laboratory; Unal, Cetin [Los Alamos National Laboratory; Atamturktur, Huriye S [CLEMSON UNIV.

    2010-01-01T23:59:59.000Z

    We demonstrate an improvement of predictive capability brought to a non-linear material model using a combination of test data, sensitivity analysis, uncertainty quantification, and calibration. A model that captures increasingly complicated phenomena, such as plasticity, temperature and strain rate effects, is analyzed. Predictive maturity is defined, here, as the accuracy of the model to predict multiple Hopkinson bar experiments. A statistical discrepancy quantifies the systematic disagreement (bias) between measurements and predictions. Our hypothesis is that improving the predictive capability of a model should translate into better agreement between measurements and predictions. This agreement, in turn, should lead to a smaller discrepancy. We have recently proposed to use discrepancy and coverage, that is, the extent to which the physical experiments used for calibration populate the regime of applicability of the model, as basis to define a Predictive Maturity Index (PMI). It was shown that predictive maturity could be improved when additional physical tests are made available to increase coverage of the regime of applicability. This contribution illustrates how the PMI changes as 'better' physics are implemented in the model. The application is the non-linear Preston-Tonks-Wallace (PTW) strength model applied to Beryllium metal. We demonstrate that our framework tracks the evolution of maturity of the PTW model. Robustness of the PMI with respect to the selection of coefficients needed in its definition is also studied.

  16. IMPLEMENTING ENTORHINAL GRID FIELDS IN BIOPHYSICAL NEURONAL MODELS

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    IMPLEMENTING ENTORHINAL GRID FIELDS IN BIOPHYSICAL NEURONAL MODELS Michiel W.H. Remme Group entorhinal cortical neurons form characteristic grid patterns as a function of the ani- mal's position neurons form characteristic grid patterns as a function of the an- imal's position [1]. The hexagonal grid

  17. UNCORRECTED Grid geometry effects on convection in ocean climate models

    E-Print Network [OSTI]

    Kuhlbrodt, Till

    UNCORRECTED PROOF Grid geometry effects on convection in ocean climate models: a conceptual study is the 12 improvement of convection parameterization schemes, but the question of grid geometry also plays to an at- 14 mosphere model. Such ocean climate models have mostly structured, coarsely resolved grids. 15

  18. Modelling Chinese Smart Grid: A Stochastic Model Checking Case Study

    E-Print Network [OSTI]

    Yüksel, Ender; Nielson, Flemming; Zhu, Huibiao; Huang, Heqing

    2012-01-01T23:59:59.000Z

    Cyber-physical systems integrate information and communication technology functions to the physical elements of a system for monitoring and controlling purposes. The conversion of traditional power grid into a smart grid, a fundamental example of a cyber-physical system, raises a number of issues that require novel methods and applications. In this context, an important issue is the verification of certain quantitative properties of the system. In this technical report, we consider a specific Chinese Smart Grid implementation and try to address the verification problem for certain quantitative properties including performance and battery consumption. We employ stochastic model checking approach and present our modelling and analysis study using PRISM model checker.

  19. A grid model for the design, coordination and dimensional optimization

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    A grid model for the design, coordination and dimensional optimization in architecture D.Léonard1 54000 Nancy, France INTRODUCTION Our article treats layout grids in architecture and their use. It initially proposes to define an architectural grid model as well as a set of operations to construct them

  20. Modeling Smart Grid using Generalized Stochastic Petri Net

    E-Print Network [OSTI]

    Dey, Amrita; Sanyal, Sugata

    2011-01-01T23:59:59.000Z

    Building smart grid for power system is a major challenge for safe, automated and energy efficient usage of electricity. The full implementation of the smart grid will evolve over time. However, before a new set of infrastructures are invested to build the smart grid, proper modeling and analysis is needed to avoid wastage of resources. Modeling also helps to identify and prioritize appropriate systems parameters. In this paper, an all comprehensive model of smart grid have been proposed using Generalized Stochastic Petri Nets (GSPN). The model is used to analyze the constraints and deliverables of the smart power grid of future.

  1. Grid Monitoring, Modeling, and Analysis | ornl.gov

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

    Modeling, and Analysis SHARE Grid Monitoring, Modeling, and Analysis The electric power industry has undergone extensive changes over the past several decades and become...

  2. Development and Implementation of a Program Management Maturity Model

    SciTech Connect (OSTI)

    Hartwig, Laura; Smith, Matt

    2008-12-15T23:59:59.000Z

    In 2006, Honeywell Federal Manufacturing & Technologies (FM&T) announced an updatedvision statement for the organization. The vision is “To be the most admired team within the NNSA [National Nuclear Security Administration] for our relentless drive to convert ideas into the highest quality products and services for National Security by applying the right technology, outstanding program management and best commercial practices.” The challenge to provide outstanding program management was taken up by the Program Management division and the Program Integration Office (PIO) of the company. This article describes how Honeywell developed and deployed a program management maturity model to drive toward excellence.

  3. 2014 Advanced Grid Modeling Peer Review Presentations - Day One...

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

    Measurement-Based Tools For Proactive Operator Decision-Support - Alberto Del Rosso, EPRI Dynamic Paradigm for Grid Operations - Henry Huang, PNNL Development of Dynamic Models...

  4. 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.

  5. Development of a fourth generation predictive capability maturity model.

    SciTech Connect (OSTI)

    Hills, Richard Guy; Witkowski, Walter R.; Urbina, Angel; Rider, William J.; Trucano, Timothy Guy

    2013-09-01T23:59:59.000Z

    The Predictive Capability Maturity Model (PCMM) is an expert elicitation tool designed to characterize and communicate completeness of the approaches used for computational model definition, verification, validation, and uncertainty quantification associated for an intended application. The primary application of this tool at Sandia National Laboratories (SNL) has been for physics-based computational simulations in support of nuclear weapons applications. The two main goals of a PCMM evaluation are 1) the communication of computational simulation capability, accurately and transparently, and 2) the development of input for effective planning. As a result of the increasing importance of computational simulation to SNL's mission, the PCMM has evolved through multiple generations with the goal to provide more clarity, rigor, and completeness in its application. This report describes the approach used to develop the fourth generation of the PCMM.

  6. O`ahu Grid Study: Validation of Grid Models

    E-Print Network [OSTI]

    16, 2007 5 2-2 Comparison of the annual energy production (MWh), by unit type, between the historical 2007 HECO energy production and the GE MAPSTM model simulation 6 2-3 Comparison of the fuel consumption

  7. Innovative SQA Service Maturity Model using CMMI and ITIL

    E-Print Network [OSTI]

    Shankar, G

    2012-01-01T23:59:59.000Z

    This Journal details a maturity model for SQA services which has been developed during QMS implementation in the IT division of a large multinational organization. The scope of the engagement was to establish a standard set of processes based on CMMI\\textregistered and ITIL\\textregistered Framework across four business verticals scattered in Europe, United States and Asia. The services of Software Quality Analyst (SQA) from different vendors were leveraged to facilitate implementation of processes which was referred to as the Quality Management System (QMS). To co-ordinate and support QMS implementation, a Software Quality Assurance Group (SQAG) was established at the organizational level. Considering the large number of applications, the business verticals proposed that process implementation should be owned and managed by practitioners themselves so that the mass deployment of QMS can be achieved at a faster rate with the same SQA capacity. This called for a need to devise an innovative implementation solut...

  8. Network Models for Power Grids: A Generative Approach

    E-Print Network [OSTI]

    Deka, Deepjyoti

    2012-01-01T23:59:59.000Z

    The inherent structure of the electrical network has a significant impact on its functioning and health. As power grids move towards becoming `smarter' with increased demand response and decentralized control, the topological aspects of the grid have become even more important. Understanding the topology can thus lead to better strategies to control the smart grid as well as enable rapid identification and prevention of risks such as blackouts. This paper focuses on modeling and analyzing basic similarities in network structure of large power grids across America and Europe. It studies the topological characteristics of power grids and develops a generative model for them. Based on the typical small world characteristics, large scale test power systems can be developed to better study the working of new algorithms for smart grids

  9. Integrated modeling of the electric grid, communications, and control

    SciTech Connect (OSTI)

    Nutaro, James J [ORNL; Miller, Laurie E [ORNL; Shankar, Mallikarjun [ORNL; Kuruganti, Phani Teja [ORNL

    2006-01-01T23:59:59.000Z

    We present a central concern in modeling and simulating electric grids and the information infrastructure that monitors and controls them: hybrid modeling and simulation. We argue that imminent modernizations and new technologies will require a joint (hybrid) modeling of the continuous world of power systems and the discrete world of events sparked by external contingencies, and by communication, computation, and control operations. The power systems community requires methods to model and simulate hybrid scenarios for systems as large and complex as the electric grid. We discuss an approach based on DEVS and present a scenario in which the integrated information and electric grid infrastructures address a frequency maintenance problem.

  10. NREL: Transmission Grid Integration - FESTIV Model

    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 Renewable Energy: Grid IntegrationReport Available

  11. NREL: Transmission Grid Integration - Generator Modeling

    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 Renewable Energy: Grid IntegrationReport AvailableForecasting NREL researchers

  12. Argonne National Laboratory Smart Grid Technology Interactive Model

    ScienceCinema (OSTI)

    Ted Bohn

    2010-01-08T23:59:59.000Z

    As our attention turns to new cars that run partially or completely on electricity, how can we redesign our electric grid to not only handle the new load, but make electricity cheap and efficient for everyone? Argonne engineer Ted Bohn explains a model of a "smart grid" that gives consumers the power to choose their own prices and sources of electricity.

  13. Argonne National Laboratory Smart Grid Technology Interactive Model

    SciTech Connect (OSTI)

    Ted Bohn

    2009-10-13T23:59:59.000Z

    As our attention turns to new cars that run partially or completely on electricity, how can we redesign our electric grid to not only handle the new load, but make electricity cheap and efficient for everyone? Argonne engineer Ted Bohn explains a model of a "smart grid" that gives consumers the power to choose their own prices and sources of electricity.

  14. A maturity model of evaluating requirements specification techniques

    E-Print Network [OSTI]

    Shin, Yonghee

    2004-11-15T23:59:59.000Z

    It is important to evaluate and understand the state-of-art technologies to position our research and invest our energy and resources in more effective ways. Unfortunately, no systematic approach has been introduced to evaluate the maturity...

  15. Chapter 7: Model Grid Setup CAPS -ARPS Version 4.0 192

    E-Print Network [OSTI]

    Droegemeier, Kelvin K.

    Chapter 7: Model Grid Setup CAPS - ARPS Version 4.0 192 7 Map Projection, Model Grid Setup and Grid Grid Setup CAPS - ARPS Version 4.0 195 of the map projection parameters being used can be retrieved. #12;Chapter 7: Model Grid Setup CAPS - ARPS Version 4.0 196 7.2.2. Map transformations Transformation

  16. Networks, smart grids: new model for synchronization

    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 Renewable Energy:Nanowire Solar541,9337, 2011 at3, Issue 30 NewNetworks, smart grids:

  17. A Survey of National Transmission Grid Modeling Capabilities at DOE

    E-Print Network [OSTI]

    Howle, Victoria E.

    711712003 A Survey of National Transmission Grid Modeling Capabilities at DOE Laboratories Steve.1 Capabilities Template....................................................................... 4 3.2 Capabilities............................................................................. 16 3.3 Completed Survey Forms................................................................. 17

  18. A grid of chemical evolution models along the Hubble Sequence

    E-Print Network [OSTI]

    Mercedes Molla; Angeles I. Diaz; Federico Ferrini

    2001-04-03T23:59:59.000Z

    We have computed a grid of multiphase chemical evolution models whose results are valid for any spiral galaxy, using as input the maximum rotation velocity and the morphological type or index T.

  19. Smart Grid Cybersecurity: Job Performance Model Report

    SciTech Connect (OSTI)

    O'Neil, Lori Ross; Assante, Michael; Tobey, David

    2012-08-01T23:59:59.000Z

    This is the project report to DOE OE-30 for the completion of Phase 1 of a 3 phase report. This report outlines the work done to develop a smart grid cybersecurity certification. This work is being done with the subcontractor NBISE.

  20. A Vertical Grid Module for Baroclinic Models of the Atmosphere

    SciTech Connect (OSTI)

    Drake, John B [ORNL

    2008-04-01T23:59:59.000Z

    The vertical grid of an atmospheric model assigns dynamic and thermo- dynamic variables to grid locations. The vertical coordinate is typically not height but one of a class of meteorological variables that vary with atmo- spheric conditions. The grid system is chosen to further numerical approx- imations of the boundary conditions so that the system is terrain following at the surface. Lagrangian vertical coordinates are useful in reducing the numerical errors from advection processes. That the choices will effect the numercial properties and accuracy is explored in this report. A MATLAB class for Lorentz vertical grids is described and applied to the vertical struc- ture equation and baroclinic atmospheric circulation. A generalized meteo- rolgoical coordinate system is developed which can support ?, isentropic ? vertical coordinate, or Lagrangian vertical coordinates. The vertical atmo- spheric column is a MATLAB class that includes the kinematic and ther- modynamic variables along with methods for computing geopoentials and terms relevant to a 3D baroclinc atmospheric model.

  1. >Technical Report UTEP-CS-06-18, April 2006< 1 Abstract--As grid infrastructures mature, an increasing

    E-Print Network [OSTI]

    Ward, Karen

    that seamlessly integrate with remote resources such as web/grid services and data repositories. In this paper weFTP servers, similar to FTP servers used on the Internet, provide a data repository for files, data management capabilities, and visualization tools. The current approach used in a number of cyber

  2. Unstructured grid modelling to create 3-D Earth models that unify geological and geophysical

    E-Print Network [OSTI]

    Farquharson, Colin G.

    Unstructured grid modelling to create 3-D Earth models that unify geological and geophysical Conclusion The common Earth model Geophysical inversion Geological and geophysical models Instructured meshes Geophysical inversion Geological and geophysical models Instructured meshes Motivation: The common Earth model

  3. Cascade Failure in a Phase Model of Power Grids

    E-Print Network [OSTI]

    Sakaguchi, Hidetsugu

    2012-01-01T23:59:59.000Z

    We propose a phase model to study cascade failure in power grids composed of generators and loads. If the power demand is below a critical value, the model system of power grids maintains the standard frequency by feedback control. On the other hand, if the power demand exceeds the critical value, an electric failure occurs via step out (loss of synchronization) or voltage collapse. The two failures are incorporated as two removal rules of generator nodes and load nodes. We perform direct numerical simulation of the phase model on a scale-free network and compare the results with a mean-field approximation.

  4. Discrete fracture modeling for fractured reservoirs using Voronoi grid blocks

    E-Print Network [OSTI]

    Gross, Matthew Edward

    2007-09-17T23:59:59.000Z

    or pseudofracture groups modeled in their own grid blocks. Discrete Fracture Modeling (DFN) is still a relatively new field, and most research on it up to this point has been done with Delaunay tessellations. This research investigates an alternative approach using...

  5. Towards Grid-Wide Modeling and Simulation

    E-Print Network [OSTI]

    Xie, Yong

    Modeling and simulation permeate all areas of business, science and engineering. With the increase in the scale and complexity of simulations, large amounts of computational resources are required, and collaborative model ...

  6. Grids of Stellar Models and Frequencies with CLES + LOSC

    E-Print Network [OSTI]

    J. Montalban; A. Miglio; A. Noels; R. Scuflaire

    2008-02-22T23:59:59.000Z

    We present a grid of stellar models, obtained with the CLES evolution code, following the specification of ESTA-Task1, and the corresponfing seismic properties, computed with the LOSC code. We provide a complete description of the corresponding files that will be available on the ESTA web-pages.

  7. A Grid of FASTWIND NLTE Model Atmospheres of Massive Stars

    E-Print Network [OSTI]

    K. Lefever; J. Puls; C. Aerts

    2006-09-22T23:59:59.000Z

    In the last few years our knowledge of the physics of massive stars has improved tremendously. However, further investigations are still needed, especially regarding accurate calibrations of their fundamental parameters. To this end, we have constructed a comprehensive grid of NLTE model atmospheres and corresponding synthetic spectra in the massive star domain. The grid covers the complete B type spectral range, extended to late O on the hot side and early A on the cool side, from supergiants to dwarfs and from weak stellar winds to very strong ones. It has been calculated with the latest version of the FASTWIND code. The analysis of an extensive sample of OB stars in the framework of the COROT space mission will lead to accurate calibrations of effective temperatures, gravities, mass loss rates etc. This paper contains a detailed description of the grid, which has been baptised as BSTAR06 and which will be available for further research in the near future.

  8. An Adaptive Multi-Grid Chemistry (AMC) Model for Efficient Simulation...

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

    An Adaptive Multi-Grid Chemistry (AMC) Model for Efficient Simulation of HCCI and DI Engine Combustion An Adaptive Multi-Grid Chemistry (AMC) Model for Efficient Simulation of HCCI...

  9. Snow ablation modelling in a mature aspen stand of the boreal forest

    E-Print Network [OSTI]

    Ni-Meister, Wenge

    Snow ablation modelling in a mature aspen stand of the boreal forest J. P. Hardy,1* R. E. Davis,1 R- ing snow ablation in a lea¯ess, deciduous aspen stand and verifying the results with ®eld data. New to estimate a branch area index for defoliated aspen as an analogue to the foliage area index used

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

    E-Print Network [OSTI]

    Hansen, René Rydhof

    Modelling and Analysis of Variable Speed Wind Turbines with Induction Generator during Grid Fault to the grid connection of wind turbines. The second chapter elucidates recent thinking in the area of grid Risø National Laboratory Vestas Wind Systems A/S #12;#12;I Modelling and Analysis of Variable Speed

  11. Modeling and Simulation of the EV Charging in a Residential Distribution Power Grid

    E-Print Network [OSTI]

    Al Faruque, Mohammad Abdullah

    in GridLAB-D (an open-source software tool used to model, simulate, and analyze power distribution systems Vehicle, Electric Vehicle Supply Equipment, GridLAB-D, Residential Distribution Power Grid I. INTRODUCTION with Electric Vehicle Supply Equipment (EVSE) and EVs. The scope of this paper is to model the EV

  12. Grid Cells: The Position Code, Neural Network Models of Activity, and the Problem of Learning

    E-Print Network [OSTI]

    Fiete, Ila

    COMMENTARY Grid Cells: The Position Code, Neural Network Models of Activity, and the Problem on the modeling and theoretical fronts in the quest to unravel the computational properties of the grid cell code and to explain the mechanisms underlying grid cell dynamics. The goals of the review are to outline a coherent

  13. A MultiPhase Power Flow Model for Grid Analysis A. P. Sakis Meliopoulos

    E-Print Network [OSTI]

    A MultiPhase Power Flow Model for µµµµGrid Analysis A. P. Sakis Meliopoulos School of Electrical multiphase power flow analysis method that provides exact solution to the operation of the µGrid under steady

  14. A Probabilistic Model for the Dynamics of Cascading Failures and Blackouts in Power Grids

    E-Print Network [OSTI]

    Hayat, Majeed M.

    systems. The control system of a reliable power grid requires (1) a good understanding of the current in the control/communication systems) factors can affect cascading failures in power grids. These factors can1 A Probabilistic Model for the Dynamics of Cascading Failures and Blackouts in Power Grids Mahshid

  15. DOE Releases Maturity Model to Better Protect the Nation's Grid from

    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 1,613PortsmouthBartlesvilleAbout »Department of2 DOEDepartment|Amchitka,Power

  16. DOE Releases Maturity Model to Better Protect the Nation's Grid from

    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 DataDepartment of Energy Your Density Isn't Your Destiny: Theof"WaveInteractions and PolicyCybersecurity Threats | Department of

  17. 2014 Advanced Grid Modeling Peer Review Presentations - Day One...

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

    Function Based Remedial Action Screening Tool Using Real-Time Data - Joydeep Mitra, Michigan State University Next Generation Data Grid Architecture - Arjun Shankar, UTK,...

  18. 2014 Advanced Grid Modeling Peer Review Presentations - Day Two...

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

    Power Grid Optimization under Uncertainty: Formulations, Algorithms, and High-Performance Computing - Victor Zavala, ANL, Jianhui Wang, ANL Chance-constrained OPF and Unit...

  19. Smart Grid Cybersecurity: Job Performance Model Report and Phase...

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

    Security Examiners to develop a set of guidelines to enhance development of the smart grid cybersecurity workforce and provide a foundation for future certifications. The project...

  20. A Grid of NLTE Line-Blanketed Model Atmospheres of Early B-type Stars

    E-Print Network [OSTI]

    Thierry Lanz; Ivan Hubeny

    2006-11-29T23:59:59.000Z

    We have constructed a comprehensive grid of 1540 metal line-blanketed, NLTE, plane-parallel, hydrostatic model atmospheres for the basic parameters appropriate to early B-type stars. The BSTAR2006 grid considers 16 values of effective temperatures, 15,000 K grid complements our earlier OSTAR2002 grid of O-type stars (Lanz & Hubeny, 2003, ApJS, 146, 417). The paper contains a description of the BSTAR2006 grid and some illustrative examples and comparisons. NLTE ionization fractions, bolometric corrections, radiative accelerations, and effective gravities are obtained over the parameter range covered by the grid. By extrapolating radiative accelerations, we have determined an improved estimate of the Eddington limit in absence of rotation between 55,000 and 15,000 K. The complete BSTAR2006 grid is available at the TLUSTY website (http://nova.astro.umd.edu).

  1. Use of the Cournot Model for the pricing of Grid-based Computational Services

    E-Print Network [OSTI]

    Melbourne, University of

    . The concept is often associated with that of the Electrical Grid where electricity is readily available a similar level of ab- straction as the Electrical Grid. One of the areas that require a considerable amount. The Cournot Model is one of the popular pric- ing models used to study oligopolies. An oligopoly is the name

  2. Laboratory tests of IEC DER object models for grid applications.

    SciTech Connect (OSTI)

    Blevins, John D. (PE Salt River Project, Phoenix, AZ); Menicucci, David F.; Byrd, Thomas, Jr. (,; .); Gonzalez, Sigifredo; Ginn, Jerry W.; Ortiz-Moyet, Juan (Primecore, Inc.)

    2007-02-01T23:59:59.000Z

    This report describes a Cooperative Research and Development Agreement (CRADA) between Salt River Project Agricultural Improvement and Power District (SRP) and Sandia National Laboratories to jointly develop advanced methods of controlling distributed energy resources (DERs) that may be located within SRP distribution systems. The controls must provide a standardized interface to allow plug-and-play capability and should allow utilities to take advantage of advanced capabilities of DERs to provide a value beyond offsetting load power. To do this, Sandia and SRP field-tested the IEC 61850-7-420 DER object model (OM) in a grid environment, with the goal of validating whether the model is robust enough to be used in common utility applications. The diesel generator OM tested was successfully used to accomplish basic genset control and monitoring. However, as presently constituted it does not enable plug-and-play functionality. Suggestions are made of aspects of the standard that need further development and testing. These problems are far from insurmountable and do not imply anything fundamentally unsound or unworkable in the standard.

  3. Sandia Energy - Grid System Planning for Wind: Wind Generator Modeling

    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 Scienceand RequirementsCoatingsUltra-High-Voltage SiliconEnergyFailureGlobal ClimateGridGridGrid

  4. Selection of Model in Developing Information Security Criteria for Smart Grid Security System

    E-Print Network [OSTI]

    Ling, Amy Poh Ai

    2011-01-01T23:59:59.000Z

    At present, the "Smart Grid" has emerged as one of the best advanced energy supply chains. This paper looks into the security system of smart grid via the smart planet system. The scope focused on information security criteria that impact on consumer trust and satisfaction. The importance of information security criteria is perceived as the main aspect to impact on customer trust throughout the entire smart grid system. On one hand, this paper also focuses on the selection of the model for developing information security criteria on a smart grid.

  5. Grid-search event location with non-Gaussian error models

    E-Print Network [OSTI]

    Rodi, William L.

    This study employs an event location algorithm based on grid search to investigate the possibility of improving seismic event location accuracy by using non-Gaussian error models. The primary departure from the Gaussian ...

  6. Finite element decomposition and grid generation for brain modeling and visualization

    E-Print Network [OSTI]

    Batte, David Allan

    1997-01-01T23:59:59.000Z

    Numerical grid generation is used to provide a framework for brain and neuron visualization. Smoothing spline surfaces are fit to contour data to generate 3D solid model reconstruction of brain tissues. Finite element methods are then used...

  7. Design and history matching of a waterflood/miscible CO? flood model of a mature field: the Wellman Unit, West Texas

    E-Print Network [OSTI]

    Rojas Barile, Jose Humberto

    2002-01-01T23:59:59.000Z

    management decisions. To accomplish this task, a reservoir model was built that honors the structural configuration of the reservoir. A flexible grid system comprised of 16,767 grid blocks was built based on corner point - non orthogonal geometry. During...

  8. An Electricity Trade Model for Microgrid Communities in Smart Grid

    E-Print Network [OSTI]

    Pedram, Massoud

    is the major trend of future smart grid, which contains various kinds of renewable power generation centers]. This distributed power generation center has made it easier to make use of all kinds of renewable energy sources as a "prosumer" (producer and consumer) [3]. It contains one or multiple kinds of renewable power generation

  9. Semantic Information Modeling for Emerging Applications in Smart Grid

    E-Print Network [OSTI]

    Prasanna, Viktor K.

    IT applications to be developed to protect and optimize power grid operations. Demand response (DR) is one efficient and reliable management of electrical power systems and optimizing the operations of its such emerging application to optimize electricity demand by curtailing/shifting power load when peak load oc

  10. A Conformal Mapping Grid Generation Method for Modeling High-Fidelity Aeroelastic Simulations

    E-Print Network [OSTI]

    Worley, Gregory

    2010-07-14T23:59:59.000Z

    A CONFORMAL MAPPING GRID GENERATION METHOD FOR MODELING HIGH-FIDELITY AEROELASTIC SIMULATIONS A Thesis by GREGORY DORWAY WORLEY Submitted to the O ce of Graduate Studies of Texas A&M University in partial ful llment of the requirements... for the degree of MASTER OF SCIENCE May 2010 Major Subject: Aerospace Engineering A CONFORMAL MAPPING GRID GENERATION METHOD FOR MODELING HIGH-FIDELITY AEROELASTIC SIMULATIONS A Thesis by GREGORY DORWAY WORLEY Submitted to the O ce of Graduate Studies of Texas A...

  11. Grid FriendlyTM Device Model Development and Simulation

    SciTech Connect (OSTI)

    Lu, Ning; Hammerstrom, Donald J.; Patrick, Stasha N.

    2009-12-30T23:59:59.000Z

    In late 2007, the Bonneville Power Administration (BPA) contracted Pacific Northwest National Laboratory (PNNL) to complete a research project titled Grid-Responsive Demand-Side Control Using Grid Friendly Appliance Technologies [Hammerstrom 2009, DeSteese and Hammerstrom 2009]. Cosponsors included Portland General Electric (PGE) and Puget Sound Energy (PSE). The project focused on applications of the Grid Friendly Appliance (GFA) controller, which is an autonomous controller that was designed to advise devices like appliances concerning valuable demand-side grid services that should be conducted. The controller bases its advice on observations it makes from the ac voltage signal. Electric tank water heaters were selected to be controlled by the GFA controller in this project. Two autonomous responses are addressed herein. First, an under-voltage-responsive water heater is able to recognize sudden reductions in feeder circuit voltage at each water heater and may curtail any electric load that is being consumed by the water heater. These under-voltage events are usually induced by nearby electrical faults. An under-voltage response is necessarily specified by the set of voltage thresholds at which the responsive water heaters would respond. The set of voltages at which the curtailment would be released must also be specified. Additionally, any delays prior to the water heater load becoming curtailed or again released must be specified. For example, a delay may be intentionally imposed prior to curtailing water heater loads to avoid responses during the fault itself. Much longer and randomized delays should be imposed prior to the release of curtailments in order to re-establish diversity of the water heater loads and soften what could otherwise be an abrupt reintroduction of a large aggregated electrical load into the already stressed grid region.

  12. Sandia National Laboratories: SMART Grid

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

    Energy Efficiency, Grid Integration, Microgrid, Modeling & Analysis, News, Partnership, SMART Grid Vermont-a leader in energy efficiency and deployment of so-called smart-grid...

  13. Sandia National Laboratories: Grid Integration

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

    Energy Efficiency, Grid Integration, Microgrid, Modeling & Analysis, News, Partnership, SMART Grid Vermont-a leader in energy efficiency and deployment of so-called smart-grid...

  14. AUSTRIAN GRID AUSTRIAN GRID

    E-Print Network [OSTI]

    AUSTRIAN GRID 1/18 AUSTRIAN GRID THE INITIAL VERSION OF SEE-GRID Document Identifier: AG-DA1c-1) #12;AUSTRIAN GRID 2/18 Delivery Slip Name Partner Date Signature From Károly Bósa RISC 31 See cover on page 3 #12;AUSTRIAN GRID 3/18 THE INITIAL VERSION OF SEE-GRID Karoly Bosa Wolfgang

  15. Triangle geometry processing for surface modeling and cartesian grid generation

    DOE Patents [OSTI]

    Aftosmis, Michael J. (San Mateo, CA) [San Mateo, CA; Melton, John E. (Hollister, CA) [Hollister, CA; Berger, Marsha J. (New York, NY) [New York, NY

    2002-09-03T23:59:59.000Z

    Cartesian mesh generation is accomplished for component based geometries, by intersecting components subject to mesh generation to extract wetted surfaces with a geometry engine using adaptive precision arithmetic in a system which automatically breaks ties with respect to geometric degeneracies. During volume mesh generation, intersected surface triangulations are received to enable mesh generation with cell division of an initially coarse grid. The hexagonal cells are resolved, preserving the ability to directionally divide cells which are locally well aligned.

  16. Analysis of a power grid using the Kuramoto-like model

    E-Print Network [OSTI]

    Giovanni Filatrella; Arne Hejde Nielsen; Niels Falsig Pedersen

    2008-02-16T23:59:59.000Z

    We show that there is a link between the Kuramoto paradigm and another system of synchronized oscillators, namely an electrical power distribution grid of generators and consumers. The purpose of this work is to show both the formal analogy and some practical consequences. The mapping can be made quantitative, and under some necessary approximations a class of Kuramoto-like models, those with bimodal distribution of the frequencies, is most appropriate for the power-grid. In fact in the power-grid there are two kinds of oscillators: the 'sources' delivering power to the 'consumers'.

  17. 3360 IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 12, NO. 7, JULY 2013 Wireless Mesh Network in Smart Grid: Modeling

    E-Print Network [OSTI]

    Wang, Wenye

    in Smart Grid: Modeling and Analysis for Time Critical Communications Yi Xu, Member, IEEE, and Wenye Wang, Senior Member, IEEE Abstract--Communication networks are an indispensable com- ponent in the smart grid that are located distributively in the grid. In particular, wireless networks will be deployed widely in the smart

  18. Evaluating North American Electric Grid Reliability Using the Barabasi-Albert Network Model

    SciTech Connect (OSTI)

    Chassin, David P.; Posse, Christian

    2005-09-15T23:59:59.000Z

    The reliability of electric transmission systems is examined using a scale-free model of network topology and failure propagation. The topologies of the North American eastern and western electric grids are analyzed to estimate their reliability based on the Barabási-Albert network model. A commonly used power system reliability index is computed using a simple failure propagation model. The results are compared to the values of power system reliability indices previously obtained using other methods and they suggest that scale-free network models are usable to estimate aggregate electric grid reliability.

  19. Evaluating North American Electric Grid Reliability Using the Barabasi-Albert Network Model

    SciTech Connect (OSTI)

    Chassin, David P.; Posse, Christian

    2005-09-15T23:59:59.000Z

    The reliability of electric transmission systems is examined using a scale-free model of network topology and failure propagation. The topologies of the North American eastern and western electric grids are analyzed to estimate their reliability based on the Barabasi-Albert network model. A commonly used power system reliability index is computed using a simple failure propagation model. The results are compared to the values of power system reliability indices previously obtained using standard power engineering methods, and they suggest that scale-free network models are usable to estimate aggregate electric grid reliability.

  20. Grid Monitoring, Modeling, and Analysis | ornl.gov

    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 AdministrationField8,Dist.NewofGeothermal Heaton Armed Services U.S.GregoryGrid Monitoring,

  1. Incorporation of NREL Solar Advisor Model Photovoltaic Capabilities with GridLAB-D

    SciTech Connect (OSTI)

    Tuffner, Francis K.; Hammerstrom, Janelle L.; Singh, Ruchi

    2012-10-19T23:59:59.000Z

    This report provides a summary of the work updating the photovoltaic model inside GridLAB-D. The National Renewable Energy Laboratory Solar Advisor Model (SAM) was utilized as a basis for algorithms and validation of the new implementation. Subsequent testing revealed that the two implementations are nearly identical in both solar impacts and power output levels. This synergized model aides the system-level impact studies of GridLAB-D, but also allows more specific details of a particular site to be explored via the SAM software.

  2. Sub-grid parameterization of snow distribution for an energy and mass balance snow cover model

    E-Print Network [OSTI]

    Sub-grid parameterization of snow distribution for an energy and mass balance snow cover model model of the lumped snowpack mass and energy balance applied to a 26-ha rangeland catchment with high (Af). The energy state variable is evolved through an energy balance. The snow water equivalence state

  3. Risk analysis via heterogeneous models of SCADA interconnecting Power Grids and Telco Networks

    E-Print Network [OSTI]

    Tronci, Enrico

    for an electrical power distribution grid. The modeling techniques we discuss aim at providing a probabilistic propagation of disturbances and adverse events between Electrical infrastructures and Telco networks. Many demonstrate their applicability by modeling and #12;analyzing an actual SCADA system for an electrical power

  4. FUTURE POWER GRID INITIATIVE Modeling of Distributed Energy

    E-Print Network [OSTI]

    models by utility companies to support their demand response operations. APPROACH Development module) » modeling of the response scheme (control module) » modeling of the aggregated effects and detailed model and will be followed by a calibration procedure. Approaches to build aggregated models

  5. 2014 Advanced Grid Modeling Program Peer Review Presentations...

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

    Modeling Research Program leverages scientific research in mathematics for application to power system models and software tools. 17 projects were presented at the 2014 Advanced...

  6. Grid Modeling for the SunShot Vision Study

    SciTech Connect (OSTI)

    Brinkman, G.; Denholm, P.; Drury, E.; Ela, E.; Mai, T.; Margolis, R.; Mowers, M.

    2012-02-01T23:59:59.000Z

    This document describes the use of production cost modeling in the SunShot Vision study, including methods used to create the SunShot Vision scenarios, their implementation in the Gridview model, and assumptions regarding transmission system and operation of each generator type. It also describes challenges and limitations of modeling solar generation technologies in production cost models, and suggests methods for improving their representation in current models.

  7. Global tropospheric ozone modeling: Quantifying errors due to grid resolution

    E-Print Network [OSTI]

    Wild, Oliver; Prather, Michael J

    2006-01-01T23:59:59.000Z

    and much higher 90th percentile abundances than modeled. Ourbox) and 10th/90th percentiles (horizontal lines). ‘‘

  8. NREL Energy Models Examine the Potential for Wind and Solar Grid Integration (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2013-11-01T23:59:59.000Z

    As renewable energy generating sources, such as wind turbines and solar power systems, reach high levels of penetration in parts of the United States, the National Renewable Energy Laboratory (NREL) is helping the utility industry to peer into the future. Using software modeling tools that the lab developed, NREL is examining the future operation of the electrical grid as renewable energy continues to grow.

  9. Developing a TeraGrid Based Land Surface Hydrology and Weather Modeling Interface

    E-Print Network [OSTI]

    Jiang, Wen

    Developing a TeraGrid Based Land Surface Hydrology and Weather Modeling Interface Hsin-I Chang1 iclimate@purdue.edu -------------------- -------------------- 1 INTRODUCTION Real world hydrologic cyberinfrastructure (CI) has been articulated in many workshops and meetings of the environmental and hydrologic

  10. The Impact of the Topology on Cascading Failures in a Power Grid Model

    E-Print Network [OSTI]

    Van Mieghem, Piet

    allocation according to Kirchoff Laws. Experimental verification on synthetic power systems showsThe Impact of the Topology on Cascading Failures in a Power Grid Model Yakup Koça,1 Martijn on the IEEE 118 bus power system to improve its robustness against cascading failures. 1. Introduction

  11. Modeling of GE Appliances in GridLAB-D: Peak Demand Reduction

    SciTech Connect (OSTI)

    Fuller, Jason C.; Vyakaranam, Bharat GNVSR; Prakash Kumar, Nirupama; Leistritz, Sean M.; Parker, Graham B.

    2012-04-29T23:59:59.000Z

    The widespread adoption of demand response enabled appliances and thermostats can result in significant reduction to peak electrical demand and provide potential grid stabilization benefits. GE has developed a line of appliances that will have the capability of offering several levels of demand reduction actions based on information from the utility grid, often in the form of price. However due to a number of factors, including the number of demand response enabled appliances available at any given time, the reduction of diversity factor due to the synchronizing control signal, and the percentage of consumers who may override the utility signal, it can be difficult to predict the aggregate response of a large number of residences. The effects of these behaviors can be modeled and simulated in open-source software, GridLAB-D, including evaluation of appliance controls, improvement to current algorithms, and development of aggregate control methodologies. This report is the first in a series of three reports describing the potential of GE's demand response enabled appliances to provide benefits to the utility grid. The first report will describe the modeling methodology used to represent the GE appliances in the GridLAB-D simulation environment and the estimated potential for peak demand reduction at various deployment levels. The second and third reports will explore the potential of aggregated group actions to positively impact grid stability, including frequency and voltage regulation and spinning reserves, and the impacts on distribution feeder voltage regulation, including mitigation of fluctuations caused by high penetration of photovoltaic distributed generation and the effects on volt-var control schemes.

  12. Developing Generic Dynamic Models for the 2030 Eastern Interconnection Grid

    SciTech Connect (OSTI)

    Kou, Gefei [ORNL; Hadley, Stanton W [ORNL; Markham, Penn N [ORNL; Liu, Yilu [ORNL

    2013-12-01T23:59:59.000Z

    The Eastern Interconnection Planning Collaborative (EIPC) has built three major power flow cases for the 2030 Eastern Interconnection (EI) based on various levels of energy/environmental policy conditions, technology advances, and load growth. Using the power flow cases, this report documents the process of developing the generic 2030 dynamic models using typical dynamic parameters. The constructed model was validated indirectly using the synchronized phasor measurements by removing the wind generation temporarily.

  13. A Grid & Place Cell Model of Path Integration Utilizing Phase Precession Versus Theta Neil Burgess12*, Caswell Barry123, Kathryn J Jeffery3, John O'Keefe2

    E-Print Network [OSTI]

    Burgess, Neil

    A Grid & Place Cell Model of Path Integration Utilizing Phase Precession Versus Theta Neil Burgess12*, Caswell Barry123, Kathryn J Jeffery3, John O'Keefe2 13Hz 7Hz 23Hz1m Grid cells in dorsomedial). Nearby grid cells have similar orientation and scale, but shifted to tile the environment B 1m Grid scale

  14. Global model of a gridded-ion thruster powered by a radiofrequency inductive coil

    SciTech Connect (OSTI)

    Chabert, P.; Arancibia Monreal, J.; Bredin, J.; Popelier, L.; Aanesland, A. [LPP, CNRS, Ecole Polytechnique, UPMC, Paris XI, 91128 Palaiseau (France)

    2012-07-15T23:59:59.000Z

    A global (volume-averaged) model of a gridded-ion thruster is proposed. The neutral propellant (xenon gas) is injected into the thruster chamber at a fixed rate and a plasma is generated by circulating a radiofrequency current in an inductive coil. The ions generated in this plasma are accelerated out of the thruster by a pair of DC biased grids. The neutralization downstream is not treated. Xenon atoms also flow out of the thruster across the grids. The model, based on particle and energy balance equations, solves for four global variables in the thruster chamber: the plasma density, the electron temperature, the neutral gas (atom) density, and the neutral gas temperature. The important quantities to evaluate the thruster efficiency and performances are calculated from these variables and from the voltage across the grids. It is found that the mass utilization efficiency rapidly decreases with the gas flow rate. However, the radiofrequency power transfer efficiency increases significantly with the injected gas flow rate. Therefore, there is a compromise to be found between these two quantities.

  15. Advanced Modeling Grid Research Program | 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 on Delicious Rank EERE: Alternative Fuels DataEnergyDepartment ofATVM LoanActiveMission »Advanced Modeling

  16. Oil and Natural Gas Subsector Cybersecurity Capability Maturity...

    Energy Savers [EERE]

    Oil and Natural Gas Subsector Cybersecurity Capability Maturity Model (February 2014) Oil and Natural Gas Subsector Cybersecurity Capability Maturity Model (February 2014) The Oil...

  17. Phase Precession and Variable Spatial Scaling in a Periodic Attractor Map Model of Medial Entorhinal Grid Cells With Realistic

    E-Print Network [OSTI]

    Hasselmo, Michael

    Phase Precession and Variable Spatial Scaling in a Periodic Attractor Map Model of Medial Entorhinal Grid Cells With Realistic After-Spike Dynamics Zaneta Navratilova,1,2 Lisa M. Giocomo,3,4 Jean that describes the generation of the spatial (grid fields) and temporal (phase precession) properties of medial

  18. A grid of MARCS model atmospheres for late-type stars I. Methods and general properties

    E-Print Network [OSTI]

    Bengt Gustafsson; Bengt Edvardsson; Kjell Eriksson; Uffe Graae Jorgensen; Aake Nordlund; Bertrand Plez

    2008-05-05T23:59:59.000Z

    We have constructed a grid of about 10,000 spherically symmetric and plane-parallel models with the MARCS program, and make it available for public use. Parameter ranges are: Teff=2500 to 8000 K, log g =log(GM/R2)= -1 to 5 (cgs) with various masses and radii, [Me/H]=-5 to +1, with [Alpha/Fe] = 0.0 and 0.4 and different choices of C and N abundances to also represent stars of types R, S and N, and with microturbulence parameters from 1 to 5 km/s. We also list fluxes in approximately 108,000 wavelength points. Underlying assumptions in addition to 1D stratification include hydrostatic equilibrium, MLT convection and LTE. A number of general properties of the models are discussed, in relation to the effects of changing blanketing and sphericity. Models are compared with other available grids and excellent agreement is found with plane-parallel models of Castelli and Kurucz within the overlapping parameter range. Although there are departures from the spherically symmetric NextGen models, the agreement with more recent PHOENIX models is gratifying. The models of the grid show regularities, but some interesting departures from general patterns occur for the coolest models due to the molecular opacities. We have tested rules of thumb concerning effects of blanketing and sphericity and found them to often be astonishingly accurate. Some interesting new phenomena have been discovered, such as the intricate coupling between blanketing and sphericity, and the strong effects of carbon enhancement on metal-poor models. We give further details of models and comparisons with observations in subsequent papers.

  19. Exploiting the Computational Grid Lecture 1 Globus and the Grid

    E-Print Network [OSTI]

    Exploiting the Computational Grid Lecture 1 ­ Globus and the Grid · The grid needs middleware to enable things such as logins etc · The toolkit model for the grid is to define a set of standards for the grid and then develop applications on top. The low level stuff is then hidden from the user · Globus

  20. Scalability of grid- and subbasin-based land surface modeling approaches for hydrologic simulations

    SciTech Connect (OSTI)

    Tesfa, Teklu K.; Leung, Lai-Yung R.; Huang, Maoyi; Li, Hongyi; Voisin, Nathalie; Wigmosta, Mark S.

    2014-03-27T23:59:59.000Z

    This paper investigates the relative merits of grid- and subbasin-based land surface modeling approaches for hydrologic simulations, with a focus on their scalability (i.e., abilities to perform consistently across a range of spatial resolutions) in simulating runoff generation. Simulations produced by the grid- and subbasin-based configurations of the Community Land Model (CLM) are compared at four spatial resolutions (0.125o, 0.25o, 0.5o and 1o) over the topographically diverse region of the U.S. Pacific Northwest. Using the 0.125o resolution simulation as the “reference”, statistical skill metrics are calculated and compared across simulations at 0.25o, 0.5o and 1o spatial resolutions of each modeling approach at basin and topographic region levels. Results suggest significant scalability advantage for the subbasin-based approach compared to the grid-based approach for runoff generation. Basin level annual average relative errors of surface runoff at 0.25o, 0.5o, and 1o compared to 0.125o are 3%, 4%, and 6% for the subbasin-based configuration and 4%, 7%, and 11% for the grid-based configuration, respectively. The scalability advantages of the subbasin-based approach are more pronounced during winter/spring and over mountainous regions. The source of runoff scalability is found to be related to the scalability of major meteorological and land surface parameters of runoff generation. More specifically, the subbasin-based approach is more consistent across spatial scales than the grid-based approach in snowfall/rainfall partitioning, which is related to air temperature and surface elevation. Scalability of a topographic parameter used in the runoff parameterization also contributes to improved scalability of the rain driven saturated surface runoff component, particularly during winter. Hence this study demonstrates the importance of spatial structure for multi-scale modeling of hydrological processes, with implications to surface heat fluxes in coupled land-atmosphere modeling.

  1. The equal load-sharing model of cascade failures in power grids

    E-Print Network [OSTI]

    Scala, Antonio

    2015-01-01T23:59:59.000Z

    Electric power-systems are one of the most important critical infrastructures. In recent years, they have been exposed to extreme stress due to the increasing demand, the introduction of distributed renewable energy sources, and the development of extensive interconnections. We investigate the phenomenon of abrupt breakdown of an electric power-system under two scenarios: load growth (mimicking the ever-increasing customer demand) and power fluctuations (mimicking the effects of renewable sources). Our results indicate that increasing the system size causes breakdowns to become more abrupt; in fact, mapping the system to a solvable statistical-physics model indicates the occurrence of a first order transition in the large size limit. Such an enhancement for the systemic risk failures (black-outs) with increasing network size is an effect that should be considered in the current projects aiming to integrate national power-grids into "super-grids".

  2. Model Developments for Development of Improved Emissions Scenarios: Developing Purchasing-Power Parity Models, Analyzing Uncertainty, and Developing Data Sets for Gridded Integrated Assessment Models

    SciTech Connect (OSTI)

    Yang, Zili; Nordhaus, William

    2009-03-19T23:59:59.000Z

    In the duration of this project, we finished the main tasks set up in the initial proposal. These tasks include: setting up the basic platform in GAMS language for the new RICE 2007 model; testing various model structure of RICE 2007; incorporating PPP data set in the new RICE model; developing gridded data set for IA modeling.

  3. A grid of chemical evolution models as a tool to interpret spiral and irregular galaxies data

    E-Print Network [OSTI]

    M. Molla; A. I. Diaz

    2005-01-18T23:59:59.000Z

    We present a generalization of the multiphase chemical evolution model applied to a wide set of theoretical galaxies with different masses and evolutionary rates. This generalized set of models has been computed using the so-called Universal Rotation Curve from Persic et al (1996) to calculate the radial mass distribution of 44 theoretical protogalaxies. This distribution is a fundamental input which, besides its own effect on the galaxy evolution, defines the characteristic collapse time-scale or gas infall rate onto the disc.We have adopted 10 sets of values, between 0 and 1, for the molecular cloud and star formation efficiencies, as corresponding to their probability nature, for each one of the radial distributions of total mass. Thus, we have constructed a bi-parametric grid of models, depending on those efficiency sets and on the rotation velocity, whose results are valid in principle for any spiral or irregular galaxy. The model results provide the time evolution of different regions of the disc and the halo along galactocentric distance, measured by the gas (atomic and molecular) and stellar masses, the star formation rate and chemical abundances of 14 elements, for a total of 440 models. This grid may be used to estimate the evolution of a given galaxy for which only present time information -- such as radial distributions of elemental abundances, gas densities and/or star formation, which are the usual observational constraints of chemical evolution models -- is available.

  4. COLLABORATIVE RESEARCH: CONTINUOUS DYNAMIC GRID ADAPTATION IN A GLOBAL ATMOSPHERIC MODEL: APPLICATION AND REFINEMENT

    SciTech Connect (OSTI)

    Gutowski, William J.; Prusa, Joseph M.; Smolarkiewicz, Piotr K.

    2012-05-08T23:59:59.000Z

    This project had goals of advancing the performance capabilities of the numerical general circulation model EULAG and using it to produce a fully operational atmospheric global climate model (AGCM) that can employ either static or dynamic grid stretching for targeted phenomena. The resulting AGCM combined EULAG's advanced dynamics core with the "physics" of the NCAR Community Atmospheric Model (CAM). Effort discussed below shows how we improved model performance and tested both EULAG and the coupled CAM-EULAG in several ways to demonstrate the grid stretching and ability to simulate very well a wide range of scales, that is, multi-scale capability. We leveraged our effort through interaction with an international EULAG community that has collectively developed new features and applications of EULAG, which we exploited for our own work summarized here. Overall, the work contributed to over 40 peer-reviewed publications and over 70 conference/workshop/seminar presentations, many of them invited. 3a. EULAG Advances EULAG is a non-hydrostatic, parallel computational model for all-scale geophysical flows. EULAG's name derives from its two computational options: EULerian (flux form) or semi-LAGrangian (advective form). The model combines nonoscillatory forward-in-time (NFT) numerical algorithms with a robust elliptic Krylov solver. A signature feature of EULAG is that it is formulated in generalized time-dependent curvilinear coordinates. In particular, this enables grid adaptivity. In total, these features give EULAG novel advantages over many existing dynamical cores. For EULAG itself, numerical advances included refining boundary conditions and filters for optimizing model performance in polar regions. We also added flexibility to the model's underlying formulation, allowing it to work with the pseudo-compressible equation set of Durran in addition to EULAG's standard anelastic formulation. Work in collaboration with others also extended the demonstrated range of validity of soundproof models, showing that they are more broadly applicable than some had previously thought. Substantial testing of EULAG included application and extension of the Jablonowski-Williamson baroclinic wave test - an archetype of planetary weather - and further analysis of multi-scale interactions arising from collapse of temperature fronts in both the baroclinic wave test and simulations of the Held-Suarez idealized climate. These analyses revealed properties of atmospheric gravity waves not seen in previous work and further demonstrated the ability of EULAG to simulate realistic behavior over several orders of magnitude of length scales. Additional collaborative work enhanced capability for modeling atmospheric flows with adaptive moving meshes and demonstrated the ability of EULAG to move into petascale computing. 3b. CAM-EULAG Advances We have developed CAM-EULAG in collaboration with former project postdoc, now University of Cape Town Assistant Professor, Babatunde Abiodun. Initial study documented good model performance in aqua-planet simulations. In particular, we showed that the grid adaptivity (stretching) implemented in CAM-EULAG allows higher resolution in selected regions without causing anomalous behavior such as spurious wave reflection. We then used the stretched-grid version to analyze simulated extreme precipitation events in West Africa, comparing the precipitation and event environment with observed behavior. The model simulates fairly well the spatial scale and the interannual and intraseasonal variability of the extreme events, although its extreme precipitation intensity is weaker than observed. In addition, both observations and the simulations show possible forcing of extreme events by African easterly waves. 3c. Other Contributions Through our collaborations, we have made contributions to a wide range of outcomes. For research focused on terrestrial behavior, these have included (1) upwind schemes for gas dynamics, (2) a nonlinear perspective on the dynamics of the Madden-Julian Oscillation, (3) numerical realism of thermal co

  5. A Multi-Stage Wear Model for Grid-to-Rod Fretting of Nuclear Fuel Rods

    SciTech Connect (OSTI)

    Blau, Peter Julian [ORNL] [ORNL

    2014-01-01T23:59:59.000Z

    The wear of fuel rod cladding against the supporting structures in the cores of pressurized water nuclear reactors (PWRs) is an important and potentially costly tribological issue. Grid-to-rod fretting (GTRF), as it is known, involves not only time-varying contact conditions, but also elevated temperatures, flowing hot water, aqueous tribo-corrosion, and the embrittling effects of neutron fluences. The multi-stage, closed-form analytical model described in this paper relies on published out-of-reactor wear and corrosion data and a set of simplifying assumptions to portray the conversion of frictional work into wear depth. The cladding material of interest is a zirconium-based alloy called Zircaloy-4, and the grid support is made of a harder and more wear-resistant material. Focus is on the wear of the cladding. The model involves an incubation stage, a surface oxide wear stage, and a base alloy wear stage. The wear coefficient, which is a measure of the efficiency of conversion of frictional work into wear damage, can change to reflect the evolving metallurgical condition of the alloy. Wear coefficients for Zircaloy-4 and for a polyphase zirconia layer were back-calculated for a range of times required to wear to a critical depth. Inputs for the model, like the friction coefficient, are taken from the tribology literature in lieu of in-reactor tribological data. Concepts of classical fretting were used as a basis, but are modified to enable the model to accommodate the complexities of the PWR environment. Factors like grid spring relaxation, pre-oxidation of the cladding, multiple oxide phases, gap formation, impact, and hydrogen embrittlement are part of the problem definition but uncertainties in their relative roles limits the ability to validate the model. Sample calculations of wear depth versus time in the cladding illustrate how GTRF wear might occur in a discontinuous fashion during months-long reactor operating cycles. A means to account for grid/rod gaps and repetitive impact effects on GTRF wear is proposed

  6. Modeling Framework and Validation of a Smart Grid and Demand Response System for Wind Power Integration

    SciTech Connect (OSTI)

    Broeer, Torsten; Fuller, Jason C.; Tuffner, Francis K.; Chassin, David P.; Djilali, Ned

    2014-01-31T23:59:59.000Z

    Electricity generation from wind power and other renewable energy sources is increasing, and their variability introduces new challenges to the power system. The emergence of smart grid technologies in recent years has seen a paradigm shift in redefining the electrical system of the future, in which controlled response of the demand side is used to balance fluctuations and intermittencies from the generation side. This paper presents a modeling framework for an integrated electricity system where loads become an additional resource. The agent-based model represents a smart grid power system integrating generators, transmission, distribution, loads and market. The model incorporates generator and load controllers, allowing suppliers and demanders to bid into a Real-Time Pricing (RTP) electricity market. The modeling framework is applied to represent a physical demonstration project conducted on the Olympic Peninsula, Washington, USA, and validation simulations are performed using actual dynamic data. Wind power is then introduced into the power generation mix illustrating the potential of demand response to mitigate the impact of wind power variability, primarily through thermostatically controlled loads. The results also indicate that effective implementation of Demand Response (DR) to assist integration of variable renewable energy resources requires a diversity of loads to ensure functionality of the overall system.

  7. COLLABORATIVE RESEARCH: CONTINUOUS DYNAMIC GRID ADAPTATION IN A GLOBAL ATMOSPHERIC MODEL: APPLICATION AND REFINEMENT

    SciTech Connect (OSTI)

    Prusa, Joseph

    2012-05-08T23:59:59.000Z

    This project had goals of advancing the performance capabilities of the numerical general circulation model EULAG and using it to produce a fully operational atmospheric global climate model (AGCM) that can employ either static or dynamic grid stretching for targeted phenomena. The resulting AGCM combined EULAG�s advanced dynamics core with the �physics� of the NCAR Community Atmospheric Model (CAM). Effort discussed below shows how we improved model performance and tested both EULAG and the coupled CAM-EULAG in several ways to demonstrate the grid stretching and ability to simulate very well a wide range of scales, that is, multi-scale capability. We leveraged our effort through interaction with an international EULAG community that has collectively developed new features and applications of EULAG, which we exploited for our own work summarized here. Overall, the work contributed to over 40 peer- reviewed publications and over 70 conference/workshop/seminar presentations, many of them invited.

  8. A Grid of 3D Stellar Atmosphere Models of Solar Metallicity: I. General Properties, Granulation and Atmospheric Expansion

    E-Print Network [OSTI]

    Trampedach, Regner; Collet, Remo; Nordlund, Åke; Stein, Robert F

    2013-01-01T23:59:59.000Z

    Present grids of stellar atmosphere models are the workhorses in interpreting stellar observations, and determining their fundamental parameters. These models rely on greatly simplified models of convection, however, lending less predictive power to such models of late type stars. We present a grid of improved and more reliable stellar atmosphere models of late type stars, based on deep, 3D, convective, stellar atmosphere simulations. This grid is to be used in general for interpreting observations, and improve stellar and asteroseismic modeling. We solve the Navier Stokes equations in 3D and concurrent with the radiative transfer equation, for a range of atmospheric parameters, covering most of stellar evolution with convection at the surface. We emphasize use of the best available atomic physics for quantitative predictions and comparisons with observations. We present granulation size, convective expansion of the acoustic cavity, asymptotic adiabat, as function of atmospheric parameters. These and other re...

  9. ModelCentric Smart Grid Workshop: From Hard Dollar Justification to RealTime Control and the Analytics That Make It Possible

    E-Print Network [OSTI]

    Ohta, Shigemi

    Agenda ModelCentric Smart Grid Workshop: From Hard Dollar Justification to RealTime Control managers and technical personnel involved with smart grid activities. The second day takes a deeper dive:30 p.m. Smart Grid "harddollar" value streams ­ an incremental value approach Efficiency

  10. Models of grid cells and theta oscillations ARISING FROM M. M.Yartsev, M. P. Witter & N. Ulanovsky Nature 479, 103107 (2011)

    E-Print Network [OSTI]

    Burgess, Neil

    2011-01-01T23:59:59.000Z

    Models of grid cells and theta oscillations ARISING FROM M. M.Yartsev, M. P. Witter & N. Ulanovsky Nature 479, 103­107 (2011) Grid cells recorded in the medial entorhinal cortex (MEC) of freely moving of intense interest. Yartsev et al.1 report that the firing of grid cells in crawling bats does not show

  11. A Micro-Grid Simulator Tool (SGridSim) using Effective Node-to-Node Complex Impedance (EN2NCI) Models

    SciTech Connect (OSTI)

    Udhay Ravishankar; Milos manic

    2013-08-01T23:59:59.000Z

    This paper presents a micro-grid simulator tool useful for implementing and testing multi-agent controllers (SGridSim). As a common engineering practice it is important to have a tool that simplifies the modeling of the salient features of a desired system. In electric micro-grids, these salient features are the voltage and power distributions within the micro-grid. Current simplified electric power grid simulator tools such as PowerWorld, PowerSim, Gridlab, etc, model only the power distribution features of a desired micro-grid. Other power grid simulators such as Simulink, Modelica, etc, use detailed modeling to accommodate the voltage distribution features. This paper presents a SGridSim micro-grid simulator tool that simplifies the modeling of both the voltage and power distribution features in a desired micro-grid. The SGridSim tool accomplishes this simplified modeling by using Effective Node-to-Node Complex Impedance (EN2NCI) models of components that typically make-up a micro-grid. The term EN2NCI models means that the impedance based components of a micro-grid are modeled as single impedances tied between their respective voltage nodes on the micro-grid. Hence the benefit of the presented SGridSim tool are 1) simulation of a micro-grid is performed strictly in the complex-domain; 2) faster simulation of a micro-grid by avoiding the simulation of detailed transients. An example micro-grid model was built using the SGridSim tool and tested to simulate both the voltage and power distribution features with a total absolute relative error of less than 6%.

  12. Open source software maturity model based on linear regression and Bayesian analysis

    E-Print Network [OSTI]

    Zhang, Dongmin

    2009-05-15T23:59:59.000Z

    based on Bayesian statistics. More importantly, an updating rule is established through Bayesian analysis to improve the joint distribution, and thus the objectivity of the coefficients in the linear multiple-regression model, according to new incoming...

  13. Grids of stellar models including second harmonic and colours: Solar composition

    E-Print Network [OSTI]

    Yildiz, Mutlu

    2015-01-01T23:59:59.000Z

    Grids of stellar evolution are required in many fields of astronomy/astrophysics, such as planet hosting stars, binaries, clusters, chemically peculiar stars, etc. In this study, a grid of stellar evolution models with updated ingredients and {recently determined solar abundaces} is presented. The solar values for the initial abundances of hydrogen, heavy elements and mixing-length parameter are 0.0172, 0.7024 and 1.98, respectively. The mass step is small enough (0.01 M$_\\odot$) that interpolation for a given star mass is not required. The range of stellar mass is 0.74 to 10.00 M$_\\odot$. We present results in different forms of tables for easy and general application. The second stellar harmonic, required for analysis of apsidal motion of eclipsing binaries, is also listed. We also construct rotating models to determine effect of rotation on stellar structure and derive fitting formula for luminosity, radius and the second stellar harmonic as a function of rotational parameter. We also compute and list colo...

  14. GridMat: Matlab Toolbox for GridLAB-D to Analyse Grid Impact and Validate Residential Microgrid Level

    E-Print Network [OSTI]

    Al Faruque, Mohammad Abdullah

    GridMat: Matlab Toolbox for GridLAB-D to Analyse Grid Impact and Validate Residential Microgrid, in this paper, we present a new Matlab toolbox (GridMat) to integrate the capabilities of domain-specific modeling & simulation tools from power system (GridLAB-D) and control (Matlab). The GridMat tool supports

  15. Method of grid generation

    DOE Patents [OSTI]

    Barnette, Daniel W. (Veguita, NM)

    2002-01-01T23:59:59.000Z

    The present invention provides a method of grid generation that uses the geometry of the problem space and the governing relations to generate a grid. The method can generate a grid with minimized discretization errors, and with minimal user interaction. The method of the present invention comprises assigning grid cell locations so that, when the governing relations are discretized using the grid, at least some of the discretization errors are substantially zero. Conventional grid generation is driven by the problem space geometry; grid generation according to the present invention is driven by problem space geometry and by governing relations. The present invention accordingly can provide two significant benefits: more efficient and accurate modeling since discretization errors are minimized, and reduced cost grid generation since less human interaction is required.

  16. Verification of sub-grid filtered drag models for gas-particle fluidized beds with immersed cylinder arrays

    SciTech Connect (OSTI)

    Sarkar, Avik; Sun, Xin; Sundaresan, Sankaran

    2014-03-01T23:59:59.000Z

    The accuracy of coarse-grid multiphase CFD simulations of fluidized beds may be improved via the inclusion of filtered constitutive models. In our previous study (Sarkar et al., Chem. Eng. Sci., 104, 399-412), we developed such a set of filtered drag relationships for beds with immersed arrays of cooling tubes. Verification of these filtered drag models is addressed in this work. Predictions from coarse-grid simulations with the sub-grid filtered corrections are compared against accurate, highly-resolved simulations of full-scale turbulent and bubbling fluidized beds. The filtered drag models offer a computationally efficient yet accurate alternative for obtaining macroscopic predictions, but the spatial resolution of meso-scale clustering heterogeneities is sacrificed.

  17. Applications (Grid Tools)

    E-Print Network [OSTI]

    Buyya, Rajkumar

    Grid Fabric Software Grid Applications Core Grid Middleware User-Level Middleware (Grid Tools) !"# $ %& ' ( ) * #& + '& ' , - . / # ) ) 0 # * 1 PDB CDB Grid Fabric Hardware &+ '' + ) , '1 '1 ' % - * # ( Grid Fabric Software Grid Applications Core Grid Middleware User-Level Middleware (Grid Tools) !"# $ %& ' ( ) * #& + '& ' , - . / # ) ) 0

  18. A grid of synthetic ionizing spectra for very hot compact stars from NLTE model atmospheres

    E-Print Network [OSTI]

    Thomas Rauch

    2003-03-20T23:59:59.000Z

    The precise analysis of properties of planetary nebulae is strongly dependent on good models for the stellar ionizing spectrum. Observations in the UV - X-ray wavelength range as well as NLTE model atmosphere calculations of spectra of their exciting stars have shown that neither blackbody fluxes nor "standard" NLTE atmosphere models which are composed out of hydrogen and helium only are good approximations. Strong differences between synthetic spectra from these compared to observed spectra at energies higher than 54 eV (He II ground state) can be ascribed to the neglect of metal-line blanketing. Realistic modeling of the emergent fluxes of hot stars in the UV - X-ray wavelength range requires metal-line blanketed NLTE model atmospheres which include all elements from hydrogen up to the iron-group. For this purpose, we present a grid (solar and halo abundance ratios) of metal-line blanketed NLTE model atmosphere fluxes which covers the parameter range of central stars of planetary nebulae.

  19. Sandia National Laboratories: smart-grid technologies

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

    smart-grid technologies New Jersey Transit FutureGrid MOU Signing On October 4, 2013, in Analysis, Energy Surety, Infrastructure Security, Microgrid, Modeling, Modeling & Analysis,...

  20. Sandia National Laboratories: Transmission Grid Integration

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

    Transmission Grid Integration Wind Generator Modeling On June 26, 2014, in Computational Modeling & Simulation, Energy, Energy Surety, Grid Integration, Infrastructure Security,...

  1. An Architectural Model for a Grid based Workflow Management Platform in Scientific Applications

    E-Print Network [OSTI]

    Costan, Alexandru; Stratan, Corina; Dobre, Ciprian; Leordeanu, Catalin; Cristea, Valentin

    2011-01-01T23:59:59.000Z

    With recent increasing computational and data requirements of scientific applications, the use of large clustered systems as well as distributed resources is inevitable. Although executing large applications in these environments brings increased performance, the automation of the process becomes more and more challenging. While the use of complex workflow management systems has been a viable solution for this automation process in business oriented environments, the open source engines available for scientific applications lack some functionalities or are too difficult to use for non-specialists. In this work we propose an architectural model for a grid based workflow management platform providing features like an intuitive way to describe workflows, efficient data handling mechanisms and flexible fault tolerance support. Our integrated solution introduces a workflow engine component based on ActiveBPEL extended with additional functionalities and a scheduling component providing efficient mapping between ta...

  2. A Framework for Modeling Cyber-Physical Switching Attacks in Smart Grid

    E-Print Network [OSTI]

    Liu, Shan; Mashayekh, Salman; Kundur, Deepa; Zourntos, Takis; Butler-Purry, Karen

    2014-01-02T23:59:59.000Z

    and demonstrate how existence of the switching vulnerability is dependent on the local structure of the power grid. We identify and demonstrate how through successful cyber intrusion and local knowledge of the grid an opponent can compute and apply a coordinated... providing opponent(s) opportunities for remotely controlling physical power system components such as modern circuit breakers possibly via illicit security breaches and intrusion. Thus, our vulnerability is applicable to a smart grid system with remotely...

  3. Model Predictive Control of Regulation Services from Commercial Buildings to the Smart Grid

    E-Print Network [OSTI]

    Maasoumy, Mehdi

    2014-01-01T23:59:59.000Z

    Services from Commercial Buildings to the Smart Grid Mehdicommercial building hvac fan as ancillary service for smartbuildings flexibility can be utilized for frequency regulation provision in the smart

  4. Green Energy Workshop Student Posters Semantic Complex Event Processing for Smart Grid Information

    E-Print Network [OSTI]

    Prasanna, Viktor K.

    for Smart Grid Information Integration and Demand Management Qunzhi Zhou, Yogesh of the power grid to a Smart Grid. The benefits of Smart Grid include demand Grid Demonstration Project. We define an ontology model for Smart Grid

  5. Argonne researchers use real-world data to model the effect of more solar on the grid

    E-Print Network [OSTI]

    Kemner, Ken

    Argonne researchers use real-world data to model the effect of more solar on the grid By Louise it right at the moment that we need it. This means that power companies must carefully balance the demand to blackouts. Adding renewable energy sources, like wind and solar, makes the process trickier because

  6. Effect of grid size on runoff and soil moisture for a variable-source-area hydrology model

    E-Print Network [OSTI]

    Walter, M.Todd

    landscapes are dependent on the distribution and pattern of soil moisture and water transport. In this paper for efficient manage- ment of water quality [U.S. Environmental Protection Agency, 1994, 1995, 1996Effect of grid size on runoff and soil moisture for a variable-source-area hydrology model Wen

  7. Scientific uncertainties in atmospheric mercury models III: Boundary and initial conditions, model grid resolution, and Hg(II) reduction mechanism

    SciTech Connect (OSTI)

    Lin, Che-Jen [ORNL; Pongprueksa, Pruek [Lamar University; Lindberg, Steven Eric [ORNL; Jang, Carey [U.S. Environmental Protection Agency, Raleigh, North Carolina; Braverman, Thomas [U.S. Environmental Protection Agency, Raleigh, North Carolina; Bullock, Russell O [NOAA; Ho, Thomas [ORNL; Chu, Hsing-Wei [Lamar University

    2008-03-01T23:59:59.000Z

    In this study, the model response in terms of simulated mercury concentration and deposition to boundary condition (BC), initial condition (IC), model grid resolution (12 km versus 36 km), and two alternative Hg(II) reduction mechanisms, was investigated. The model response to the change of gaseous elemental mercury (GEM) concentration from 0 to 2 ngm3 in IC/BC is found to be very linear (r240.99) based on the results of sensitivity simulations in July 2001. An increase of 1 ngm3 of GEM in BC resulted in an increase of 0.81 ngm3 in the monthly average of total mercury concentration, and 1270 ngm2 in the monthly total deposition. IC has similar but weaker effects compared to those of BC. An increase of 1 ngm3 of GEM in IC resulted in an increase of 0.14 ngm3 in the monthly average of total mercury concentration, and 250 ngm2 in the monthly total deposition. Varying reactive gaseous mercury (RGM) or particulate mercury (PHg) in BC/IC has much less significant impact. Simulation results at different grid resolutions show good agreement (slope 0.950 1.026, r 0.816 0.973) in mercury concentration, dry deposition, and total deposition. The agreement in wet deposition is somewhat weaker (slope 0.770 0.794, r 0.685 0.892) due to the difference in emission dilution and simulated precipitation that subsequently change reaction rates in the aqueous phase. Replacing the aqueous Hg(II)-HO2 reduction by either RGM reduction by CO (51018cm3 molecule1 s1) or photoreduction of RGM (1105 s1) gives significantly better model agreement with the wet deposition measured by Mercury Deposition Network (MDN). Possible ranges of the reduction rates are estimated based on model sensitivity results. The kinetic estimate requires further verification by laboratory studies.

  8. Factored Models for Multiscale Decision-Making in Smart Grid Customers Prashant P. Reddy

    E-Print Network [OSTI]

    Veloso, Manuela M.

    of customers in the management of demand, and renewable energy supply, is a critical goal of the Smart Grid on offering customers financial incentives through variable-price tariffs; we also contribute an ef- fective the past decade (Str- bac 2008). Smart Grid customers are steadily acquiring dis- tributed renewable

  9. Optimisation of an idealised ocean model, stochastic parameterisation of sub-grid eddies

    E-Print Network [OSTI]

    Fenwick C. Cooper; Laure Zanna

    2014-10-21T23:59:59.000Z

    An optimisation scheme is developed to accurately represent the sub-grid scale forcing of a high dimensional chaotic ocean system. Using a simple parameterisation scheme, the velocity components of a 30km resolution shallow water ocean model are optimised to have the same climatological mean and variance as that of a less viscous 7.5km resolution model. The 5 day lag-covariance is also optimised, leading to a more accurate estimate of the high resolution response to forcing using the low resolution model. The system considered is an idealised barotropic double gyre that is chaotic at both resolutions. Using the optimisation scheme, we find and apply the constant in time, but spatially varying, forcing term that is equal to the time integrated forcing of the sub-mesoscale eddies. A linear stochastic term, independent of the large-scale flow, with no spatial correlation but a spatially varying amplitude and time scale is used to represent the transient eddies. The climatological mean, variance and 5 day lag-covariance of the velocity from a single high resolution integration is used to provide an optimisation target. No other high resolution statistics are required. Additional programming effort, for example to build a tangent linear or adjoint model, is not required either. The focus of this paper is on the optimisation scheme and the accuracy of the optimised flow. The method can be applied in future investigations into the physical processes that govern barotropic turbulence and it can perhaps be applied to help understand and correct biases in the mean and variance of a more realistic coarse or eddy-permitting ocean model. The method is complementary to current parameterisations and can be applied at the same time without modification.

  10. Understanding The Smart Grid

    SciTech Connect (OSTI)

    NONE

    2007-11-15T23:59:59.000Z

    The report provides an overview of what the Smart Grid is and what is being done to define and implement it. The electric industry is preparing to undergo a transition from a centralized, producer-controlled network to a decentralized, user-interactive one. Not only will the technology involved in the electric grid change, but the entire business model of the industry will change too. A major objective of the report is to identify the changes that the Smart Grid will bring about so that industry participants can be prepared to face them. A concise overview of the development of the Smart Grid is provided. It presents an understanding of what the Smart Grid is, what new business opportunities or risks might come about due to its introduction, and what activities are already taking place regarding defining or implementing the Smart Grid. This report will be of interest to the utility industry, energy service providers, aggregators, and regulators. It will also be of interest to home/building automation vendors, information technology vendors, academics, consultants, and analysts. The scope of the report includes an overview of the Smart Grid which identifies the main components of the Smart Grid, describes its characteristics, and describes how the Smart Grid differs from the current electric grid. The overview also identifies the key concepts involved in the transition to the Smart Grid and explains why a Smart Grid is needed by identifying the deficiencies of the current grid and the need for new investment. The report also looks at the impact of the Smart Grid, identifying other industries which have gone through a similar transition, identifying the overall benefits of the Smart Grid, and discussing the impact of the Smart Grid on industry participants. Furthermore, the report looks at current activities to implement the Smart Grid including utility projects, industry collaborations, and government initiatives. Finally, the report takes a look at key technology providers involved in the Smart Grid and provides profiles on them including contact information, company overviews, technology reviews, and key Smart Grid activities.

  11. Scientific Final Report: COLLABORATIVE RESEARCH: CONTINUOUS DYNAMIC GRID ADAPTATION IN A GLOBAL ATMOSPHERIC MODEL: APPLICATION AND REFINEMENT

    SciTech Connect (OSTI)

    William J. Gutowski; Joseph M. Prusa, Piotr K. Smolarkiewicz

    2012-04-09T23:59:59.000Z

    This project had goals of advancing the performance capabilities of the numerical general circulation model EULAG and using it to produce a fully operational atmospheric global climate model (AGCM) that can employ either static or dynamic grid stretching for targeted phenomena. The resulting AGCM combined EULAG's advanced dynamics core with the 'physics' of the NCAR Community Atmospheric Model (CAM). Effort discussed below shows how we improved model performance and tested both EULAG and the coupled CAM-EULAG in several ways to demonstrate the grid stretching and ability to simulate very well a wide range of scales, that is, multi-scale capability. We leveraged our effort through interaction with an international EULAG community that has collectively developed new features and applications of EULAG, which we exploited for our own work summarized here. Overall, the work contributed to over 40 peer-reviewed publications and over 70 conference/workshop/seminar presentations, many of them invited.

  12. Oil and Natural Gas Subsector Cybersecurity Capability Maturity...

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

    Oil and Natural Gas Subsector Cybersecurity Capability Maturity Model (ONG-C2M2) The Oil and Natural Gas Subsector Cybersecurity Capability Maturity Model (ONG-C2M2) was...

  13. Modelling the effects of solar activity onto the Greek national electric grid

    E-Print Network [OSTI]

    Zois, Ioannis P

    2013-01-01T23:59:59.000Z

    We study both the short term and long term effects of solar activity on the large transformers (150kV and 400kV) of the Greek national electric grid. We use data analysis and various analytic and statistical methods and models. Contrary to the common belief in PPC Greece, we see that there are considerable both short term (immediate) and long term effects of solar activity onto large transformers in a mid-latitude country like Greece. Our results can be summarized as follows: For the short term effects: During 1989-2010 there were 43 stormy days (namely days with for example Ap larger or equal to 100) and we had 19 failures occurring during a stormy day plus or minus 3 days and 51 failures occurring during a stormy day plus or minus 7 days. All these failures can be directly related to Geomagnetically Induced Currents (GICs). Explicit cases are presented. For the long term effects we have two main results: The maximum number of transformer failures occur 3-4 years after the maximum of solar activity. There is...

  14. Grid Integration

    SciTech Connect (OSTI)

    Not Available

    2008-09-01T23:59:59.000Z

    Summarizes the goals and activities of the DOE Solar Energy Technologies Program efforts within its grid integration subprogram.

  15. An investigation of the sub-grid variability of trace gases and aerosols for global climate modeling

    SciTech Connect (OSTI)

    Qian, Yun; Gustafson, William I.; Fast, Jerome D.

    2010-07-29T23:59:59.000Z

    One fundamental property and limitation of grid based models is their inability to identify spatial details smaller than the grid cell size. While decades of work have gone into developing sub-grid treatments for clouds and land surface processes in climate models, the quantitative understanding of sub-grid processes and variability for aerosols and their precursors is much poorer. In this study, WRF-Chem is used to simulate the trace gases and aerosols over central Mexico during the 2006 MILAGRO field campaign, with multiple spatial resolutions and emission/terrain scenarios. Our analysis focuses on quantifying the sub-grid variability (SGV) of trace gases and aerosols within a typical global climate model grid cell, i.e. 75x75 km2. Our results suggest that a simulation with 3-km horizontal grid spacing adequately reproduces the overall transport and mixing of trace gases and aerosols downwind of Mexico City, while 75-km horizontal grid spacing is insufficient to represent local emission and terrain-induced flows along the mountain ridge, subsequently affecting the transport and mixing of plumes from nearby sources. Therefore, the coarse model grid cell average may not correctly represent aerosol properties measured over polluted areas. Probability density functions (PDFs) for trace gases and aerosols show that secondary trace gases and aerosols, such as O3, sulfate, ammonium, and nitrate, are more likely to have a relatively uniform probability distribution (i.e. smaller SGV) over a narrow range of concentration values. Mostly inert and long-lived trace gases and aerosols, such as CO and BC, are more likely to have broad and skewed distributions (i.e. larger SGV) over polluted regions. Over remote areas, all trace gases and aerosols are more uniformly distributed compared to polluted areas. Both CO and O3 SGV vertical profiles are nearly constant within the PBL during daytime, indicating that trace gases are very efficiently transported and mixed vertically by turbulence. But, simulated horizontal variability indicates that trace gases and aerosols are not well mixed horizontally in the PBL. During nighttime the SGV for trace gases is maximum at the surface, and quickly decreases with height. Unlike the trace gases, the SGV of BC and secondary aerosols reaches a maximum at the PBL top during the day. The SGV decreases with distance away from the polluted urban area, has a more rapid decrease for long-lived trace gases and aerosols than for secondary ones, and is greater during daytime than nighttime. The SGV of trace gases and aerosols is generally larger than for meteorological quantities. Emissions can account for up to 50% of the SGV over urban areas such as Mexico City during daytime for less-reactive trace gases and aerosols, such as CO and BC. The impact of emission spatial variability on SGV decays with altitude in the PBL and is insignificant in the free troposphere. The emission variability affects SGV more significantly during daytime (rather than nighttime) and over urban (rather than rural or remote) areas. The terrain, through its impact on meteorological fields such as wind and the PBL structure, affects dispersion and transport of trace gases and aerosols and their SGV.

  16. Analysis of grid imprinting on geodesic spherical icosahedral grids Pedro S. Peixoto, Saulo R. M. Barros

    E-Print Network [OSTI]

    Analysis of grid imprinting on geodesic spherical icosahedral grids Pedro S. Peixoto, Saulo R. M-090 S~ao Paulo, Brazil Abstract Numerical grid imprinting errors have often been observed in global atmospheric models on icosahedral grids. In this paper we analyse the sources of grid imprinting error related

  17. Grid Security

    E-Print Network [OSTI]

    Sinnott, R.O.

    Sinnott,R.O. National Centre for e-Social Science book, Grid Computing: Technology, Service and Application, CRC Press, November 2008.

  18. A Toolkit for Modelling and Simulation of Data Grids with Integration of Data Storage, Replication and

    E-Print Network [OSTI]

    Buyya, Rajkumar

    Barry St, Carlton VIC 3053 Australia bFaculty of Computer and Information Science The University, such as in the area of astronomy, protein simulation and high energy physics. This is because experiments have developed provides essential building blocks for simulating Data Grid scenarios. It provides

  19. The Virtual Observatory and Grid in Spain

    E-Print Network [OSTI]

    J. D. Santander-Vela

    2008-07-08T23:59:59.000Z

    The Virtual Observatory (VO) is nearing maturity, and in Spain the Spanish VO (SVO) exists since June 2004. There have also been numerous attempts at providing more or less encompassing grid initiatives at the national level, and finally Spain has an official National Grid Initiative (NGI). In this article we will show the VO and Grid development status of nationally funded initiatives in Spain, and we will hint at potential joint VO-Grid use-cases to be developed in Spain in the near future.

  20. Development of multi-hierarchy simulation model with non-uniform space grids for collisionless driven reconnection

    SciTech Connect (OSTI)

    Usami, Shunsuke [Department of Helical Plasma Research, National Institute for Fusion Science, Toki 509-5292 (Japan)] [Department of Helical Plasma Research, National Institute for Fusion Science, Toki 509-5292 (Japan); Horiuchi, Ritoku; Ohtani, Hiroaki [Department of Helical Plasma Research, National Institute for Fusion Science, Toki 509-5292 (Japan) [Department of Helical Plasma Research, National Institute for Fusion Science, Toki 509-5292 (Japan); The Graduate University for Advanced Studies (Soken-dai), Toki 509-5292 (Japan); Den, Mitsue [National Institute of Information and Communications Technology, Koganei 184-8795 (Japan)] [National Institute of Information and Communications Technology, Koganei 184-8795 (Japan)

    2013-06-15T23:59:59.000Z

    A multi-hierarchy simulation model aimed at magnetic reconnection studies has been developed, in which macroscopic and microscopic physics are solved self-consistently and simultaneously. In this work, the previous multi-hierarchy model by these authors is extended to a more realistic one with non-uniform space grids. Based on the domain decomposition method, the multi-hierarchy model consists of three parts: a magnetohydrodynamics algorithm to express the macroscopic global dynamics, a particle-in-cell algorithm to describe the microscopic kinetic physics, and an interface algorithm to interlock macro and micro hierarchies. For its verification, plasma flow injection is simulated in this multi-hierarchy model and it is confirmed that the interlocking method can describe the correct physics. Furthermore, this model is applied to collisionless driven reconnection in an open system. Magnetic reconnection is found to occur in a micro hierarchy by injecting plasma from a macro hierarchy.

  1. Point-trained models in a grid environment: Transforming a potato late blight risk forecast for use with the National Digital Forecast Database

    E-Print Network [OSTI]

    Douches, David S.

    Point-trained models in a grid environment: Transforming a potato late blight risk forecast for use have come to expect. Potato late blight risk models were some of the earliest weather-based models. This analysis compares two types of potato late blight risk models that were originally trained on location

  2. Smart Grid Investments Improve Grid Reliability, Resilience,...

    Office of Environmental Management (EM)

    Investments Improve Grid Reliability, Resilience, and Storm Responses (November 2014) Smart Grid Investments Improve Grid Reliability, Resilience, and Storm Responses (November...

  3. Smart Grid | Argonne National Laboratory

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

    Researchers from Argonne National Laboratory modeled several scenarios to add more solar power to the electric grid, using real-world data from the southwestern power...

  4. Sandia National Laboratories: Grid Integration

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

    Sandia-Electric Power Research Institute Partnership Publishes Photovoltaic Reliability Report On January 21, 2014, in Energy, Facilities, Grid Integration, Modeling & Analysis,...

  5. A Framework for Modeling Cyber-Physical Switching Attacks in Smart Grid 

    E-Print Network [OSTI]

    Liu, Shan; Mashayekh, Salman; Kundur, Deepa; Zourntos, Takis; Butler-Purry, Karen

    2014-01-02T23:59:59.000Z

    IEEE TRANSACTIONS ON EMERGING TOPICS IN COMPUTING Received 24 March 2013; revised 8 August 2013 and 14 November 2013; accepted 21 November 2013. Date of publication 2 January 2014; date of current version 21 January 2014. Digital Object Identifier... switching attacks whereby an opponent aims to destabilize the power grid by VOLUME 1, NO. 2, DECEMBER 2013 2168-6750 2014 IEEE. Translations and content mining are permitted for academic research only. Personal use is also permitted, but republication...

  6. Cyber Security & Smart Grid

    E-Print Network [OSTI]

    Shapiro, J.

    2011-01-01T23:59:59.000Z

    of the impacts of long-term power shortages from the destruction of critical electric infrastructure. ? A Hitachi factory north of Tokyo that makes 60% of the world?s supply of airflow sensors was shut down. This caused General Motors to shut a plant... at The University of Texas at Dallas ? Next Generation Control Systems ? Trustworthy Cyber Infrastructure for the Power Grid ? Active Defense Systems ? System Vulnerability Assessments ? Grid Test Bed ? Integrated Risk Analysis ? Modeling and Simulation...

  7. Grid Architecture

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

    Integration of Distributed Generation", John McDonald, et.al. Electrical Transmission and Smart Grids, Springer, 2013. 4.25 Figure 4.17. Common Distribution Looping Arrangements In...

  8. In the OSTI Collections: Keeping Power Grids Stable | OSTI, US...

    Office of Scientific and Technical Information (OSTI)

    -pp. 14-15 (pp. 18-19 of 48), "The Smart Grid: An Introduction"U. S. Department of Energy Figure 2. Test model of a transmission grid. (a) The model grid is composed of 81...

  9. 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)

  10. FUTURE POWER GRID INITIATIVE GridPACK: Grid Parallel Advanced

    E-Print Network [OSTI]

    FUTURE POWER GRID INITIATIVE GridPACK: Grid Parallel Advanced Computational Kernels OBJECTIVE The U of the power grid will also have to evolve to insure accurate and timely simulations. On the other hand, the software tools available for power grid simulation today are primarily sequential single core programs

  11. Multiobjective tuning of Grid-enabled Earth System Models using a Non-dominated Sorting Genetic

    E-Print Network [OSTI]

    A. R. Price; I. I. Voutchkov; G. E. Pound; N. R. Edwards; T. M. Lenton; S. J. Cox; The Genie Team

    -dominated sorting genetic algorithm (NSGA-II) to the GENIE-1 Earth System Model (ESM). Twelve model parameters are

  12. Efficient Algorithm for Locating and Sizing Series Compensation Devices in Large Transmission Grids: Model Implementation (PART 1)

    SciTech Connect (OSTI)

    Frolov, Vladimir [Moscow Inst. of Physics and Technology (MIPT), Moscow (Russian Federation); Backhaus, Scott N. [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Chertkov, Michael [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

    2014-01-14T23:59:59.000Z

    We explore optimization methods for planning the placement, sizing and operations of Flexible Alternating Current Transmission System (FACTS) devices installed to relieve transmission grid congestion. We limit our selection of FACTS devices to Series Compensation (SC) devices that can be represented by modification of the inductance of transmission lines. Our master optimization problem minimizes the l1 norm of the inductance modification subject to the usual line thermal-limit constraints. We develop heuristics that reduce this non-convex optimization to a succession of Linear Programs (LP) which are accelerated further using cutting plane methods. The algorithm solves an instance of the MatPower Polish Grid model (3299 lines and 2746 nodes) in 40 seconds per iteration on a standard laptop—a speed up that allows the sizing and placement of a family of SC devices to correct a large set of anticipated congestions. We observe that our algorithm finds feasible solutions that are always sparse, i.e., SC devices are placed on only a few lines. In a companion manuscript, we demonstrate our approach on realistically-sized networks that suffer congestion from a range of causes including generator retirement. In this manuscript, we focus on the development of our approach, investigate its structure on a small test system subject to congestion from uniform load growth, and demonstrate computational efficiency on a realistically-sized network.

  13. Smart Grid Integration Laboratory

    SciTech Connect (OSTI)

    Wade Troxell

    2011-09-30T23:59:59.000Z

    The initial federal funding for the Colorado State University Smart Grid Integration Laboratory is through a Congressionally Directed Project (CDP), DE-OE0000070 Smart Grid Integration Laboratory. The original program requested in three one-year increments for staff acquisition, curriculum development, and instrumentation â?? all which will benefit the Laboratory. This report focuses on the initial phase of staff acquisition which was directed and administered by DOE NETL/ West Virginia under Project Officer Tom George. Using this CDP funding, we have developed the leadership and intellectual capacity for the SGIC. This was accomplished by investing (hiring) a core team of Smart Grid Systems engineering faculty focused on education, research, and innovation of a secure and smart grid infrastructure. The Smart Grid Integration Laboratory will be housed with the separately funded Integrid Laboratory as part of CSUâ??s overall Smart Grid Integration Center (SGIC). The period of performance of this grant was 10/1/2009 to 9/30/2011 which included one no cost extension due to time delays in faculty hiring. The Smart Grid Integration Laboratoryâ??s focus is to build foundations to help graduate and undergraduates acquire systems engineering knowledge; conduct innovative research; and team externally with grid smart organizations. Using the results of the separately funded Smart Grid Workforce Education Workshop (May 2009) sponsored by the City of Fort Collins, Northern Colorado Clean Energy Cluster, Colorado State University Continuing Education, Spirae, and Siemens has been used to guide the hiring of faculty, program curriculum and education plan. This project develops faculty leaders with the intellectual capacity to inspire its students to become leaders that substantially contribute to the development and maintenance of Smart Grid infrastructure through topics such as: (1) Distributed energy systems modeling and control; (2) Energy and power conversion; (3) Simulation of electrical power distribution system that integrates significant quantities of renewable and distributed energy resources; (4) System dynamic modeling that considers end-user behavior, economics, security and regulatory frameworks; (5) Best practices for energy management IT control solutions for effective distributed energy integration (including security with the underlying physical power systems); (6) Experimental verification of effects of various arrangements of renewable generation, distributed generation and user load types along with conventional generation and transmission. Understanding the core technologies for enabling them to be used in an integrated fashion within a distribution network remains is a benefit to the future energy paradigm and future and present energy engineers.

  14. Emulating maize yields from global gridded crop models using statistical estimates

    E-Print Network [OSTI]

    Blanc, E.

    This study estimates statistical models emulating maize yield responses to changes in temperature and

  15. Collaborative study of GENIEfy Earth System Models using scripted database workflows in a Grid

    E-Print Network [OSTI]

    A. R. Price; Z. Jiao; I. I. Voutchkov; T. M. Lenton; G. Williams; D. J. Lunt; R. Marsh; P. J. Valdes; S. J. Cox; The Genie Team

    algorithms complement the component framework to provide a comprehensive toolset for Earth system modelling

  16. NATL Grid Map 50-Meter Grid

    E-Print Network [OSTI]

    Slatton, Clint

    NATL-east NATL Grid Map 50-Meter Grid Locations in NATL can be specified by reference to a grid intervals. Each gridline intersection ("grid point") is identified by its two gridlines (e.g., E5). Each 50x50-m block formed by the gridlines is identified by the grid point in its northwest corner (e

  17. A SUB-GRID VOLUME-OF-FLUIDS (VOF) MODEL FOR MIXING IN RESOLVED SCALE AND IN UNRESOLVED SCALE COMPUTATIONS

    SciTech Connect (OSTI)

    VOLD, ERIK L. [Los Alamos National Laboratory; SCANNAPIECO, TONY J. [Los Alamos National Laboratory

    2007-10-16T23:59:59.000Z

    A sub-grid mix model based on a volume-of-fluids (VOF) representation is described for computational simulations of the transient mixing between reactive fluids, in which the atomically mixed components enter into the reactivity. The multi-fluid model allows each fluid species to have independent values for density, energy, pressure and temperature, as well as independent velocities and volume fractions. Fluid volume fractions are further divided into mix components to represent their 'mixedness' for more accurate prediction of reactivity. Time dependent conversion from unmixed volume fractions (denoted cf) to atomically mixed (af) fluids by diffusive processes is represented in resolved scale simulations with the volume fractions (cf, af mix). In unresolved scale simulations, the transition to atomically mixed materials begins with a conversion from unmixed material to a sub-grid volume fraction (pf). This fraction represents the unresolved small scales in the fluids, heterogeneously mixed by turbulent or multi-phase mixing processes, and this fraction then proceeds in a second step to the atomically mixed fraction by diffusion (cf, pf, af mix). Species velocities are evaluated with a species drift flux, {rho}{sub i}u{sub di} = {rho}{sub i}(u{sub i}-u), used to describe the fluid mixing sources in several closure options. A simple example of mixing fluids during 'interfacial deceleration mixing with a small amount of diffusion illustrates the generation of atomically mixed fluids in two cases, for resolved scale simulations and for unresolved scale simulations. Application to reactive mixing, including Inertial Confinement Fusion (ICF), is planned for future work.

  18. Selection of coals of different maturities for CO2 Storage by modelling of CH4 and CO2 adsorption isotherms

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    rue de la Férollerie, 45072 Orléans Cedex, France Abstract CO2 injection in unmineable coal seams capacities on various coals for the future modelling of CO2 injection in coal seams. Keywords: CO2 storage is estimated from 3 up to 200 GtCO2 therefore CO2 storage in coal seams is one of the potential types

  19. Computational Needs for the Next Generation Electric Grid Proceedings

    E-Print Network [OSTI]

    Birman, Kenneth

    2012-01-01T23:59:59.000Z

    system planning, renewable energy, smart grids, storage planning projects will become even more critical as the smart grid planning  models.   Some  of  these  objectives  are  not  well  defined,  like  smart?grid 

  20. Nested-grid simulation of mercury over North America

    E-Print Network [OSTI]

    2012-01-01T23:59:59.000Z

    Chemistry and Physics Nested-grid simulation of mercury overY. Zhang et al. : Nested-grid simulation of mercury overand Chen, S. -Y. : Plume-in-grid modeling of atmospheric

  1. Modeling of Plug-in Electric Vehicles Interactions with a Sustainable Community Grid in the Azores

    E-Print Network [OSTI]

    Mendes, Goncalo

    2013-01-01T23:59:59.000Z

    Distributed Generation, Plug-in Electric Vehicles (PEVs), Energy Management, Multi-Building Modeling and Simulation Introduction The Green Islands

  2. NREL Smart Grid Projects

    SciTech Connect (OSTI)

    Hambrick, J.

    2012-01-01T23:59:59.000Z

    Although implementing Smart Grid projects at the distribution level provides many advantages and opportunities for advanced operation and control, a number of significant challenges must be overcome to maintain the high level of safety and reliability that the modern grid must provide. For example, while distributed generation (DG) promises to provide opportunities to increase reliability and efficiency and may provide grid support services such as volt/var control, the presence of DG can impact distribution operation and protection schemes. Additionally, the intermittent nature of many DG energy sources such as photovoltaics (PV) can present a number of challenges to voltage regulation, etc. This presentation provides an overview a number of Smart Grid projects being performed by the National Renewable Energy Laboratory (NREL) along with utility, industry, and academic partners. These projects include modeling and analysis of high penetration PV scenarios (with and without energy storage), development and testing of interconnection and microgrid equipment, as well as the development and implementation of advanced instrumentation and data acquisition used to analyze the impacts of intermittent renewable resources. Additionally, standards development associated with DG interconnection and analysis as well as Smart Grid interoperability will be discussed.

  3. Development of a Sub-Grid Model of a Diesel Particulate Filter...

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

    More Documents & Publications The State of the Science in Diesel Particulate Control fundamental Modeling and Experimental Studies of Acicular Mullite Diesel...

  4. Evaluating North American Electric Grid Reliability Using the Barabasi-Albert Network Model

    E-Print Network [OSTI]

    David P. Chassin; Christian Posse

    2005-03-11T23:59:59.000Z

    The reliability of electric transmission systems is examined using a scale-free model of network structure and failure propagation. The topologies of the North American eastern and western electric networks are analyzed to estimate their reliability based on the Barabasi-Albert network model. A commonly used power system reliability index is computed using a simple failure propagation model. The results are compared to the values of power system reliability indices previously obtained using standard power system reliability analysis methods, and they suggest that scale-free network models are useful for estimating aggregate electric network reliability.

  5. Development and Validation of WECC Variable Speed Wind Turbine Dynamic Models for Grid Integration Studies

    SciTech Connect (OSTI)

    Behnke, M.; Ellis, A.; Kazachkov, Y.; McCoy, T.; Muljadi, E.; Price, W.; Sanchez-Gasca, J.

    2007-09-01T23:59:59.000Z

    This paper describes reduced-order, simplified wind turbine models for analyzing the stability impact of large arrays of wind turbines with a single point of network interconnection.

  6. Chapter 5: Ball Grid Array (BGA) 5.1 Development of the Models

    E-Print Network [OSTI]

    Berlin,Technische Universität

    of these is left to a future sub-model of the solder joints. The top and bottom layers of each ball are 25 micron #12;Thirdly, the unit cell is replicated to form a block of 34 solder balls, which represents one Results The predicted lifetime of each model is based on the strain development within the solder joints

  7. Numerical Modeling of Fractured Shale-Gas and Tight-Gas Reservoirs Using Unstructured Grids

    E-Print Network [OSTI]

    Olorode, Olufemi Morounfopefoluwa

    2012-02-14T23:59:59.000Z

    Various models featuring horizontal wells with multiple induced fractures have been proposed to characterize flow behavior over time in tight gas and shale gas systems. Currently, there is little consensus regarding the effects of non...

  8. Parameterization of urban sub-grid scale processes in global atmospheric chemistry models

    E-Print Network [OSTI]

    Calbó, Josep.; Pan, Wen Wei.; Webster, Mort David.; Prinn, Ronald G.; McRae, Gregory J.

    We have derived a parameterization consisting of a set of analytical expressions that approximate the predictions by the CIT Urban Airshed Model for the net export to the environment (i.e., effective emissions) of several ...

  9. Development of an Atmospheric Climate Model with Self-Adapting Grid and Physics

    SciTech Connect (OSTI)

    Penner, Joyce E. [University of Michigan] University of Michigan

    2013-08-10T23:59:59.000Z

    This project was targeting the development of a computational approach that would allow resolving cloud processes on small-scales within the framework of the most recent version of the NASA/NCAR Finite-Volume Community Atmospheric Model (FVCAM). The FVCAM is based on the multidimensional Flux-Form Semi-Lagrangian (FFSL) dynamical core and uses a ?vertically Lagrangian? finite-volume (FV) representation of the model equations with a mass-conserving re-mapping algorithm. The Lagrangian coordinate requires a remapping of the Lagrangian volume back to Eulerian coordinates to restore the original resolution and keep the mesh from developing distortions such as layers with overlapping interfaces. The main objectives of the project were, first, to develop the 3D library which allows refinement and coarsening of the model domain in spherical coordinates, and second, to develop a non-hydrostatic code for calculation of the model variables within the refined areas that could be seamlessly incorporated with the hydrostatic finite volume dynamical core when higher resolution is wanted. We also updated the aerosol simulation model in CAM in order to ready the model for the treatment of aerosol/cloud interactions.

  10. The accuracy of climate models' simulated season lengths and the effectiveness of grid scale correction factors

    SciTech Connect (OSTI)

    Winterhalter, Wade

    2011-09-01T23:59:59.000Z

    Global climate change is expected to impact biological populations through a variety of mechanisms including increases in the length of their growing season. Climate models are useful tools for predicting how season length might change in the future. However, the accuracy of these models tends to be rather low at regional geographic scales. Here, I determined the ability of several atmosphere and ocean general circulating models (AOGCMs) to accurately simulate historical season lengths for a temperate ectotherm across the continental United States. I also evaluated the effectiveness of regional-scale correction factors to improve the accuracy of these models. I found that both the accuracy of simulated season lengths and the effectiveness of the correction factors to improve the model's accuracy varied geographically and across models. These results suggest that regional specific correction factors do not always adequately remove potential discrepancies between simulated and historically observed environmental parameters. As such, an explicit evaluation of the correction factors' effectiveness should be included in future studies of global climate change's impact on biological populations.

  11. FUTURE POWER GRID INITIATIVE Next Generation Network

    E-Print Network [OSTI]

    designed by PNNL and currently being deployed in the AEP gridSMART Demonstration Project, and » developed that will position PNNL as the leader in modeling and planning power grid data communication networks. External users scenarios and testing of communication requirements with smart grid investments. November 2012 PNNL-SA-90012

  12. Quick evaluation of multiple geostatistical models using upscaling with coarse grids: A practical study

    SciTech Connect (OSTI)

    Lemouzy, P. [Institut Francais du Petrole and ELF/IFP Helios Group, Pau (France)

    1997-08-01T23:59:59.000Z

    In field delineation phase, uncertainty in hydrocarbon reservoir descriptions is large. To quickly examine the impact of this uncertainty on production performance, it is necessary to evaluate a large number of descriptions in relation to possible production methods (well spacing, injection rate, etc.). The method of using coarse upscaled models was first proposed by Ballin. Unlike other methods (connectivity analysis, tracer simulations), it considers parameters such as PVT, well management, etc. After a detailed review of upscaling issues, applications to water-injection cases (either with balance or imbalance of production, with or without aquifer) and to depletion of an oil reservoir with aquifer coning are presented. Much more important than the method of permeability upscaling far from wells, the need of correct upscaling of numerical well representation is pointed out Methods are proposed to accurately represent fluids volumes in coarse models. Simple methods to upscale relative permeabilities, and methods to efficiently correct numerical dispersion are proposed. Good results are obtained for water injection. The coarse upscaling method allows the performance of sensitivity analyses on model parameters at a much lower CPU cost than comprehensive simulations. Models representing extreme behaviors can be easily distinguished. For depletion of an oil reservoir showing aquifer coning, however, the method did not work property. It is our opinion that further research is required for upscaling close to wells. We therefore recombined this method for practical use in the case of water injection.

  13. From the Grid to the Smart Grid, Topologically

    E-Print Network [OSTI]

    Pagani, Giuliano Andrea

    2013-01-01T23:59:59.000Z

    The Smart Grid is not just about the digitalization of the Power Grid. In its more visionary acceptation, it is a model of energy management in which the users are engaged in producing energy as well as consuming it, while having information systems fully aware of the energy demand-response of the network and of dynamically varying prices. A natural question is then: to make the Smart Grid a reality will the Distribution Grid have to be updated? We assume a positive answer to the question and we consider the lower layers of Medium and Low Voltage to be the most affected by the change. In our previous work, we have analyzed samples of the Dutch Distribution Grid in our previous work and we have considered possible evolutions of these using synthetic topologies modeled after studies of complex systems in other technological domains in another previous work. In this paper, we take an extra important further step by defining a methodology for evolving any existing physical Power Grid to a good Smart Grid model th...

  14. Final report for %22High performance computing for advanced national electric power grid modeling and integration of solar generation resources%22, LDRD Project No. 149016.

    SciTech Connect (OSTI)

    Reno, Matthew J.; Riehm, Andrew Charles; Hoekstra, Robert John; Munoz-Ramirez, Karina; Stamp, Jason Edwin; Phillips, Laurence R.; Adams, Brian M.; Russo, Thomas V.; Oldfield, Ron A.; McLendon, William Clarence, III; Nelson, Jeffrey Scott; Hansen, Clifford W.; Richardson, Bryan T.; Stein, Joshua S.; Schoenwald, David Alan; Wolfenbarger, Paul R.

    2011-02-01T23:59:59.000Z

    Design and operation of the electric power grid (EPG) relies heavily on computational models. High-fidelity, full-order models are used to study transient phenomena on only a small part of the network. Reduced-order dynamic and power flow models are used when analysis involving thousands of nodes are required due to the computational demands when simulating large numbers of nodes. The level of complexity of the future EPG will dramatically increase due to large-scale deployment of variable renewable generation, active load and distributed generation resources, adaptive protection and control systems, and price-responsive demand. High-fidelity modeling of this future grid will require significant advances in coupled, multi-scale tools and their use on high performance computing (HPC) platforms. This LDRD report demonstrates SNL's capability to apply HPC resources to these 3 tasks: (1) High-fidelity, large-scale modeling of power system dynamics; (2) Statistical assessment of grid security via Monte-Carlo simulations of cyber attacks; and (3) Development of models to predict variability of solar resources at locations where little or no ground-based measurements are available.

  15. Source rock maturation, San Juan sag

    SciTech Connect (OSTI)

    Gries, R.R.; Clayton, J.L.

    1989-09-01T23:59:59.000Z

    Kinetic modeling for thermal histories was simulated for seven wells in the San Juan sag honoring measured geochemical data. Wells in the area of Del Norte field (Sec. 9, T40N, R5E), where minor production has been established from an igneous sill reservoir, show that the Mancos Shale source rocks are in the mature oil generation window as a combined result of high regional heat flow and burial by approximately 2,700 m of Oligocene volcanic rocks. Maturation was relatively recent for this area and insignificant during Laramide subsidence. In the vicinity of Gramps field (Sec. 24, T33N, R2E) on the southwest flank of the San Juan sag, these same source rocks are exposed due to erosion of the volcanic cover but appear to have undergone a similar maturation history. At the north and south margins of the sag, two wells (Champlin 34A-13, Sec. 13, T35N, R4.5E; and Champlin 24A-1, Sec. 1, T44N, R5E) were analyzed and revealed that although the regional heat flow was probably similar to other wells, the depth of burial was insufficient to cause maturation (except where intruded by thick igneous sills that caused localized maturation). The Meridian Oil 23-17 South Fork well (Sec. 17, T39N, R4E) was drilled in a deeper part of the San Juan sag, and source rocks were intruded by numerous igneous sills creating a complex maturation history that includes overmature rocks in the lowermost Mancos Shale, possible CO{sub 2} generation from the calcareous Niobrara Member of the Mancos Shale, and mature source rocks in the upper Mancos Shale.

  16. AN EXTENDED GRID OF NOVA MODELS. III. VERY LUMINOUS, RED NOVAE

    SciTech Connect (OSTI)

    Shara, Michael M.; Zurek, David [Department of Astrophysics, American Museum of Natural History, Central Park West and 79th Street, New York, NY 10024-5192 (United States); Yaron, Ofer; Prialnik, Dina; Kovetz, Attay [Department of Geophysics and Planetary Sciences, Sackler Faculty of Exact Sciences, Tel Aviv University, Ramat Aviv 69978 (Israel)

    2010-12-10T23:59:59.000Z

    Extremely luminous, red eruptive variables like RV in M31 are being suggested as exemplars of a new class of astrophysical objects. Our greatly extended series of nova simulations shows that classical nova models can produce very red, luminous eruptions. In a poorly studied corner of three-dimensional nova parameter space (very cold, low-mass white dwarfs, accreting at very low rates) we find bona fide classical novae that are very luminous and red because they eject very slowly moving, massive envelopes. A crucial prediction of these nova models-in contrast to the predictions of merging star ('mergeburst') models-is that a hot remnant, the underlying white dwarf, will emerge after the massive ejected envelope has expanded enough to become optically thin. This blue remnant must fade on a timescale of decades-much faster than a 'mergeburst', which must fade on timescales of millennia or longer. Furthermore, the cooling nova white dwarf and its expanding ejecta must become redder in the years after eruption, while a contracting mergeburst must become hotter and bluer. We predict that red novae will always brighten to L {approx} 1000 L{sub sun} for about one year before rising to the maximum luminosity at L {approx} 10{sup 6}-10{sup 7} L{sub sun}. The maximum luminosity attainable by a nova is likely to be L {approx} 10{sup 7} L{sub sun}, corresponding to M {approx} -12. In an accompanying paper, we describe a fading, luminous blue candidate for the remnant of M31-RV; it is observed with the Hubble Space Telescope to be compatible only with the nova model.

  17. Earth resistivity measurement near substation ground grids

    SciTech Connect (OSTI)

    Lodwig, S.G.; Mateja, S.A. [ComEd, Chicago, IL (United States)

    1996-11-01T23:59:59.000Z

    Proper substation grounding grid design requires good, accurate soil resistivity measurements. This data is essential to model the substation ground grid to design a safe ground grid with a satisfactory ground grid resistance at minimum cost. For substations with several decades of service, there is some concern that a grid may have deteriorated, been damaged during equipment installation or excavation, or that initial soil resistivity measurements were lost or may not have been correctly performed. Ground grid conductors change the substation surface voltage distribution. Any voltage measurements taken at the complete substation will also vary from the tests made without conductors present. During testing, current was injected in the soil by probes placed near the ground grid. The current tends to follow the ground grid conductors since copper is a far better conductor than the soil it is placed in. Resistance readings near grids will be lower than readings in undisturbed soil. Since computer models were unavailable for many years, analyzing the effect of the grid conductors on soil resistivity measurements was very difficult. As a result, soil resistivity measurements made close to substations were of little use to the engineer unless some means of correcting the measured values could be developed. This paper will present results of soil resistivity measurements near a substation ground grid before and after a ground grid has been installed and describes a means of calculating the undisturbed soil model.

  18. Atmospheric Properties from the 2006 Niamey Deployment and Climate Simulation with a Geodesic Grid Coupled Climate Model Fourth Quarter 2008

    SciTech Connect (OSTI)

    JH Mather; DA Randall; CJ Flynn

    2008-09-30T23:59:59.000Z

    In 2008, the Atmospheric Radiation Measurement (ARM) Program and the Climate Change Prediction Program (CCPP) have been asked to produce joint science metrics. For CCPP, the metrics will deal with a decade-long control simulation using geodesic grid-coupled climate model. For ARM, the metrics will deal with observations associated with the 2006 deployment of the ARM Mobile Facility (AMF) to Niamey, Niger. Specifically, ARM has been asked to deliver data products for Niamey that describe cloud, aerosol, and dust properties. The first quarter milestone was the initial formulation of the algorithm for retrieval of these properties. The second quarter milestone included the time series of ARM-retrieved cloud properties and a year-long CCPP control simulation. The third quarter milestone included the time series of ARM-retrieved aerosol optical depth and a three-year CCPP control simulation. This final fourth quarter milestone includes the time-series of aerosol and dust properties and a decade-long CCPP control simulation.

  19. Modeling and Analysis of the Role of Fast-Response Energy Storage in the Smart Grid

    E-Print Network [OSTI]

    Su, Han-I

    2011-01-01T23:59:59.000Z

    The large short time-scale variability of renewable energy resources presents significant challenges to the reliable operation of power systems. This variability can be mitigated by deploying fast-ramping generators. However, these generators are costly to operate and produce environmentally harmful emissions. Fast-response energy storage devices, such as batteries and flywheels, provide an environmentally friendly alternative, but are expensive and have limited capacity. To study the environmental benefits of storage, we introduce a slotted-time dynamic residual dc power flow model with the prediction error of the difference between the generation (including renewables) and the load as input and the fast-ramping generation and the storage (charging/discharging) operation as the control variables used to ensure that the demand is satisfied (as much as possible) in each time slot. We assume the input prediction error sequence to be i.i.d. zero-mean random variables. The optimal power flow problem is then formu...

  20. Now Available: Smart Grid Investments Improve Grid Reliability...

    Energy Savers [EERE]

    Smart Grid Investments Improve Grid Reliability, Resilience, and Storm Responses (November 2014) Now Available: Smart Grid Investments Improve Grid Reliability, Resilience, and...

  1. Grid artifact reduction for direct digital radiography detectors based on rotated stationary grids with homomorphic filtering

    SciTech Connect (OSTI)

    Kim, Dong Sik [Department of Electronics Engineering, Hankuk University of Foreign Studies, Gyeonggi-do 449-791 (Korea, Republic of); Lee, Sanggyun [R and D Center, DRTECH Co., Gyeonggi-do 463-782 (Korea, Republic of)

    2013-06-15T23:59:59.000Z

    Purpose: Grid artifacts are caused when using the antiscatter grid in obtaining digital x-ray images. In this paper, research on grid artifact reduction techniques is conducted especially for the direct detectors, which are based on amorphous selenium. Methods: In order to analyze and reduce the grid artifacts, the authors consider a multiplicative grid image model and propose a homomorphic filtering technique. For minimal damage due to filters, which are used to suppress the grid artifacts, rotated grids with respect to the sampling direction are employed, and min-max optimization problems for searching optimal grid frequencies and angles for given sampling frequencies are established. The authors then propose algorithms for the grid artifact reduction based on the band-stop filters as well as low-pass filters. Results: The proposed algorithms are experimentally tested for digital x-ray images, which are obtained from direct detectors with the rotated grids, and are compared with other algorithms. It is shown that the proposed algorithms can successfully reduce the grid artifacts for direct detectors. Conclusions: By employing the homomorphic filtering technique, the authors can considerably suppress the strong grid artifacts with relatively narrow-bandwidth filters compared to the normal filtering case. Using rotated grids also significantly reduces the ringing artifact. Furthermore, for specific grid frequencies and angles, the authors can use simple homomorphic low-pass filters in the spatial domain, and thus alleviate the grid artifacts with very low implementation complexity.

  2. Principal Characteristics of a Modern Grid

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

    Some Technical Challenges Symposium on Modeling & Control of Alternative Energy Systems Joe Miller - Modern Grid Team Lead April 2, 2009 1 Conducted by the National Energy...

  3. Sandia National Laboratories: electric grid resilience

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

    Microgrid, Modeling & Analysis, News, News & Events, Partnership, Renewable Energy, SMART Grid, Systems Analysis, Systems Engineering Mayor Says New System Will 'Keep Everyone...

  4. Sandia National Laboratories: electric grid stabilization

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

    Microgrid, Modeling & Analysis, News, News & Events, Partnership, Renewable Energy, SMART Grid, Systems Analysis, Systems Engineering Mayor Says New System Will 'Keep Everyone...

  5. Sandia National Laboratories: modernize the electric grid

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

    Microgrid, Modeling & Analysis, News, News & Events, Partnership, Renewable Energy, SMART Grid, Systems Analysis, Systems Engineering Mayor Says New System Will 'Keep Everyone...

  6. Feasibility Grids for Localization and Mapping in Crowded Urban Scenes

    E-Print Network [OSTI]

    Wang, Chieh-Chih "Bob"

    Feasibility Grids for Localization and Mapping in Crowded Urban Scenes Shao-Wen Yang and Chieh mapping method is the occupancy grid mapping algorithm [1] which represents maps by a collection of fine-grained grid cells that model the occupancy states of the environment. Occupancy grid mapping representation

  7. Multi-scale modeling of Puget Sound using an unstructured-grid coastal ocean model: from tide flats to estuaries and coastal waters

    SciTech Connect (OSTI)

    Yang, Zhaoqing; Khangaonkar, Tarang

    2010-11-19T23:59:59.000Z

    Water circulation in Puget Sound, a large complex estuary system in the Pacific Northwest coastal ocean of the United States, is governed by multiple spatially and temporally varying forcings from tides, atmosphere (wind, heating/cooling, precipitation/evaporation, pressure), and river inflows. In addition, the hydrodynamic response is affected strongly by geomorphic features, such as fjord-like bathymetry and complex shoreline features, resulting in many distinguishing characteristics in its main and sub-basins. To better understand the details of circulation features in Puget Sound and to assist with proposed nearshore restoration actions for improving water quality and the ecological health of Puget Sound, a high-resolution (around 50 m in estuaries and tide flats) hydrodynamic model for the entire Puget Sound was needed. Here, a threedimensional circulation model of Puget Sound using an unstructured-grid finite volume coastal ocean model is presented. The model was constructed with sufficient resolution in the nearshore region to address the complex coastline, multi-tidal channels, and tide flats. Model open boundaries were extended to the entrance of the Strait of Juan de Fuca and the northern end of the Strait of Georgia to account for the influences of ocean water intrusion from the Strait of Juan de Fuca and the Fraser River plume from the Strait of Georgia, respectively. Comparisons of model results, observed data, and associated error statistics for tidal elevation, velocity, temperature, and salinity indicate that the model is capable of simulating the general circulation patterns on the scale of a large estuarine system as well as detailed hydrodynamics in the nearshore tide flats. Tidal characteristics, temperature/salinity stratification, mean circulation, and river plumes in estuaries with tide flats are discussed.

  8. Software Technology Readiness for the Smart Grid

    SciTech Connect (OSTI)

    Tugurlan, Maria C.; Kirkham, Harold; Chassin, David P.

    2011-06-13T23:59:59.000Z

    Abstract Budget and schedule overruns in product development due to the use of immature technologies constitute an important matter for program managers. Moreover, unexpected lack of technology maturity is also a problem for buyers. Both sides of the situation would benefit from an unbiased measure of technology maturity. This paper presents the use of a software maturity metric called Technology Readiness Level (TRL), in the milieu of the smart grid. For most of the time they have been in existence, power utilities have been protected monopolies, guaranteed a return on investment on anything they could justify adding to the rate base. Such a situation did not encourage innovation, and instead led to widespread risk-avoidance behavior in many utilities. The situation changed at the end of the last century, with a series of regulatory measures, beginning with the Public Utility Regulatory Policy Act of 1978. However, some bad experiences have actually served to strengthen the resistance to innovation by some utilities. Some aspects of the smart grid, such as the addition of computer-based control to the power system, face an uphill battle. It is our position that the addition of TRLs to the decision-making process for smart grid power-system projects, will lead to an environment of more confident adoption.

  9. Statistical classification of cascading failures in power grids

    E-Print Network [OSTI]

    Pfitzner, Rene

    We introduce a new microscopic model of the outages in transmission power grids. This model accounts for the automatic response of the grid to load fluctuations that take place on the scale of minutes, when the optimum ...

  10. DEVELOPMENT OF A 3D GRID, FRACTURE AND PROPERTY MODELS FOR THE UPPER FREEPORT COAL AND OVERBURDEN USING 3D

    E-Print Network [OSTI]

    Wilson, Thomas H.

    in unminable coal seams. The pilot test is being conducted by CONSOL Energy Inc. Several site characterization of the Upper Freeport coal seam in southeastern Marshall Co. The site lies within a1km2 area that is outlined dimension. Grid cell thickness in the Pittsburgh and Upper Freeport coal seams was set at 8 feet and 5 feet

  11. Quantifying the Impact of Adverse Events on the Electricity Grid as a Function of Grid Topology

    SciTech Connect (OSTI)

    Coles, Garill A.; Sadovsky, Artyom; Du, Pengwei

    2011-11-30T23:59:59.000Z

    Abstract--Traditional approaches to the study of grid vulnerability have taken an asset based approach, which seeks to identify those assets most likely to result in grid-wide failures or disruptions in the event that they are compromised. We propose an alternative approach to the study of grid vulnerability, one based on the topological structure of the entire grid. We propose a method that will identify topological parameters most closely related to the ability of the grid to withstand an adverse event. We compare these topological parameters in terms of their impact on the vulnerability metric we have defined, referred to as the grid’s “survivability”. Our approach is motivated by Paul Baran’s work on communications networks, which also studied vulnerability in terms of network-wide parameters. Our approach is useful both as a planning model for evaluating proposed changes to a grid and as a risk assessment tool.

  12. Tyrosinase maturation through the mammalian secretory pathway: bringing color to life

    E-Print Network [OSTI]

    Hebert, Daniel N.

    Tyrosinase maturation through the mammalian secretory pathway: bringing color to life Ning Wang-mail: dhebert@biochem.umass.edu Summary Tyrosinase has been extensively utilized as a model substrate to study in the matur- ation of tyrosinase from when it is first synthesized by cytosolic ribosomes until the mature

  13. Sandia National Laboratories: Modeling & Analysis

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

    On September 19, 2013, in Computational Modeling & Simulation, Distribution Grid Integration, Energy, Facilities, Grid Integration, Modeling, Modeling & Analysis, News, News &...

  14. NREL: Transmission Grid Integration - Grid Simulation

    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 Renewable Energy: Grid IntegrationReport AvailableForecasting NREL researchersGrid

  15. Smart Grid Consortium, Response of New York State Smart Grid...

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

    Consortium, Response of New York State Smart Grid Addressing Policy and Logistical Challenges Smart Grid Consortium, Response of New York State Smart Grid Addressing Policy and...

  16. Grid Interaction Tech Team, and International Smart Grid Collaboration...

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

    Team, and International Smart Grid Collaboration Grid Interaction Tech Team, and International Smart Grid Collaboration 2012 DOE Hydrogen and Fuel Cells Program and Vehicle...

  17. 2012 Smart Grid Peer Review Presentations - Day 2 Smart Grid...

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

    Smart Grid Panel Discussion 2012 Smart Grid Peer Review Presentations - Day 2 Smart Grid Panel Discussion The Office of Electricity Delivery and Energy Reliability held its...

  18. FUTURE POWER GRID INITIATIVE GridOPTICSTM

    E-Print Network [OSTI]

    of individual software products November 2012 PNNL-SA-90162 Ian Gorton Pacific Northwest National Laboratory (509) 375-3850 ian.gorton@pnnl.gov ABOUT FPGI The Future Power Grid Initiative (FPGI) will deliver next National Laboratory's (PNNL) national electric grid research facility, the FPGI will advance the science

  19. POWER GRID RELIABILITY AND SECURITY

    SciTech Connect (OSTI)

    Bose, Anjan; Venkatasubramanian, Vaithianathan; Hauser, Carl; Bakken, David; Anderson, David; Zhao, Chuanlin; Liu, Dong; Yang, Tao; Meng, Ming; Zhang, Lin; Ning, Jiawei; Tashman, Zaid

    2014-09-30T23:59:59.000Z

    This project has led to the development of a real-time simulation platform for electric power grids called Grid Simulator or GridSim for simulating the dynamic and information network interactions of large- scale power systems. The platform consists of physical models of power system components including synchronous generators, loads and control, which are simulated using a modified commercial power simulator namely Transient Stability Analysis Tool (TSAT) [1] together with data cleanup components, as well as an emulated substation level and wide-area power analysis components. The platform also includes realistic representations of communication network middleware that can emulate the real-time information flow back and forth between substations and control centers in wide-area power systems. The platform has been validated on a realistic 6000-bus model of the western American power system. The simulator GridSim developed in this project is the first of its kind in its ability to simulate real-time response of large-scale power grids, and serves as a cost effective real-time stability and control simulation platform for power industry.

  20. Sandia National Laboratories: Grid Integration

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

    Grid Integration Energy Supply Transformation Needed On February 20, 2013, in DETL, Distribution Grid Integration, Energy, Energy Assurance, Energy Surety, Grid Integration,...

  1. Sandia National Laboratories: SMART Grid

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

    SMART Grid Mesa del Sol Project Is Finalist for International Smart Grid Action Network 2014 Award of Excellence On July 31, 2014, in Distribution Grid Integration, Energy, Energy...

  2. Grid Logging: Best Practices Guide

    E-Print Network [OSTI]

    Tierney, Brian L

    2008-01-01T23:59:59.000Z

    Revision date: March 1, 2008 Grid Logging: Best Practicesis to help developers of Grid middleware and applicationlog files that will be useful to Grid administrators, users,

  3. Sandia National Laboratories: SMART Grid

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

    Offers Approach to Help Utilities Understand Effects of PV Variability on the Grid On March 7, 2013, in DETL, Distribution Grid Integration, Energy, Energy Surety, Facilities, Grid...

  4. Smart Grid Data Integrity Attack

    E-Print Network [OSTI]

    Poolla, Kameshwar

    2012-01-01T23:59:59.000Z

    Data Injection Attacks on Power Grids”, IEEE Transactionson Smart Grid, vol. 2, no. 2, June [21] O. Kosut, L.Data Attacks on Smart Grid State Estimation: Attack

  5. Sandia National Laboratories: electric grid

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

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

  6. FUTURE POWER GRID INITIATIVE Real-time High-Performance

    E-Print Network [OSTI]

    FUTURE POWER GRID INITIATIVE Real-time High-Performance Computing Infrastructure for Next- Generation Power Grid Analysis OBJECTIVE » We are developing infrastructure, software, formal models for real Infrastructure Operations Center (EIOC), the Pacific Northwest National Laboratory's (PNNL) national electric

  7. Smart Grid Overview

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

    Smart Grid Overview Ben Kroposki, PhD, PE Director, Energy Systems IntegraLon NaLonal Renewable Energy Laboratory What is t he S mart Grid? and DER Source: NISTEPRI Architecture...

  8. Fuel rod support grid

    DOE Patents [OSTI]

    Downs, Robert E. (Monroeville, PA); Schwallie, Ambrose L. (Greensburg, PA)

    1985-01-01T23:59:59.000Z

    A grid for the support of nuclear fuel rods arranged in a triangular array. The grid is formed by concentric rings of strap joined by radially arranged web sections.

  9. The soft grid

    E-Print Network [OSTI]

    Kardasis, Ari (Ari David)

    2011-01-01T23:59:59.000Z

    The grid in architecture is a systematic organization of space. The means that architects use to organize space are, almost by definition, rigid and totalizing. The Cartesian grid, which will serve as the antagonist of the ...

  10. NIST Priority Action Plan 2 Guidelines for Assessing Wireless Standards for Smart Grid

    E-Print Network [OSTI]

    Magee, Joseph W.

    NIST Priority Action Plan 2 Guidelines for Assessing Wireless Standards for Smart Grid Applications ..................................................................................................................................... 8 3 SMART GRID CONCEPTUAL MODEL AND BUSINESS FUNCTIONAL REQUIREMENTS .................. 13 3.1 SMART GRID CONCEPTUAL REFERENCE DIAGRAMS

  11. Evolution of long-lived globular cluster stars I. Grid of stellar models with helium enhancement at [Fe/H] = -1.75

    E-Print Network [OSTI]

    Chantereau, William; Decressin, Thibaut

    2015-01-01T23:59:59.000Z

    Our understanding of the formation and early evolution of globular clusters (GCs) has been totally overthrown with the discovery of the peculiar chemical properties of their long-lived host stars. As a consequence, the interpretation of the observed color-magnitude diagrams and of the properties of the GC stellar populations requires the use of stellar models computed with relevant chemical compositions. We present a grid of 224 stellar evolution for low-mass stars with initial masses between 0.3 and 1.0 Msun and initial helium mass fraction between 0.248 and 0.8 computed for [Fe/H]=-1.75 with the stellar evolution code STAREVOL. This grid is made available to the community. We explore the implications of the assumed initial chemical distribution for the main properties of the stellar models: evolution paths in the Hertzsprung-Russel diagram (HRD), duration and characteristics of the main evolutionary phases, and the chemical nature of the white dwarf remnants. We also provide the ranges in initial stellar ma...

  12. Physics from Angular Projection of Rectangular Grids

    E-Print Network [OSTI]

    Singh, Ashmeet

    2015-01-01T23:59:59.000Z

    In this paper, we present a mathematical model for the angular projection of a rectangular arrangement of points in a grid. This simple, yet interesting problem, has both a scholarly value and applications for data extraction techniques to study the physics of various systems. Our work can interest undergraduate students to understand subtle points in the angular projection of a grid and describes various quantities of interest in the projection with completeness and sufficient rigour. We show that for certain angular ranges, the projection has non-distinctness, and calculate the details of such angles, and correspondingly, the number of distinct points and the total projected length. We focus on interesting trends obtained for the projected length of the grid elements and present a simple application of the model to determine the geometry of an unknown grid whose spatial extensions are known, using measurement of the grid projection at two angles only. Towards the end, our model is shown to have potential ap...

  13. For the Grid and Through the Grid: The Role of Power Line Communications in the Smart Grid

    E-Print Network [OSTI]

    Galli, Stefano; Wang, Zhifang

    2010-01-01T23:59:59.000Z

    Is Power Line Communication (PLC) a good candidate for Smart Grid applications? The objective of this paper is to address this important question. To do so we provide an overview of what PLC can deliver today by surveying its history and describing the most recent technological advances in the area. We then address Smart Grid applications as instances of sensor networking and network control problems and discuss the main conclusion one can draw from the literature on these subjects. The application scenario of PLC within the Smart Grid is then analyzed in detail. Since a necessary ingredient of network planning is modeling, we also discuss two aspects of engineering modeling that relate to our question. The first aspect is modeling the PLC channel through fading models. The second aspect we review is the Smart Grid control and traffic modeling problem which allows us to achieve a better understanding of the communications requirements. Finally, this paper reports recent studies on the electrical and topologic...

  14. Grid Cells and Theta as Oscillatory Interference: Theory and Predictions

    E-Print Network [OSTI]

    Burgess, Neil

    Grid Cells and Theta as Oscillatory Interference: Theory and Predictions Neil Burgess* ABSTRACT: The oscillatory interference model [Burgess et al. (2007) Hippocampus 17:801­802] of grid cell firing is reviewed as an algorith- mic level description of path integration and as an implementation level description of grid

  15. Principal Characteristics of a Modern Grid

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

    decision making by agents vs. operator Moving to a more de-centralized model Office of Electricity Delivery and Energy Reliability MODERN GRID S T R A T E G Y 8 Culture Change A...

  16. Cloud feedback studies with a physics grid

    SciTech Connect (OSTI)

    Dipankar, Anurag [Max Planck Institute for Meteorology Hamburg; Stevens, Bjorn [Max Planck Institute for Meteorology Hamburg

    2013-02-07T23:59:59.000Z

    During this project the investigators implemented a fully parallel version of dual-grid approach in main frame code ICON, implemented a fully conservative first-order interpolation scheme for horizontal remapping, integrated UCLA-LES micro-scale model into ICON to run parallely in selected columns, and did cloud feedback studies on aqua-planet setup to evaluate the classical parameterization on a small domain. The micro-scale model may be run in parallel with the classical parameterization, or it may be run on a "physics grid" independent of the dynamics grid.

  17. Grid Transformation Workshop

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

    3-03-Grid-Transformation-Workshop Sign In About | Careers | Contact | Investors | bpa.gov Search News & Us Expand News & Us Projects & Initiatives Expand Projects &...

  18. Mapping Unstructured Grids to Structured Grids and Multigrid

    E-Print Network [OSTI]

    Chapter 4 Mapping Unstructured Grids to Structured Grids and Multigrid Many problems based solution is to map the unstructured grid onto a structured grid and then apply multigrid to a sequence). We 65 #12; CHAPTER 4. MAPPING UNSTRUCTURED GRIDS 66 show that unless great care is taken

  19. IEEE Smart Grid Series of Standards IEEE 2030 (Interoperability) and IEEE 1547 (Interconnection) Status: Preprint

    SciTech Connect (OSTI)

    Basso, T.; DeBlasio, R.

    2012-04-01T23:59:59.000Z

    The IEEE American National Standards smart grid publications and standards development projects IEEE 2030, which addresses smart grid interoperability, and IEEE 1547TM, which addresses distributed resources interconnection with the grid, have made substantial progress since 2009. The IEEE 2030TM and 1547 standards series focus on systems-level aspects and cover many of the technical integration issues involved in a mature smart grid. The status and highlights of these two IEEE series of standards, which are sponsored by IEEE Standards Coordinating Committee 21 (SCC21), are provided in this paper.

  20. Grid Architecture William E. Johnston

    E-Print Network [OSTI]

    Grid Architecture William E. Johnston Lawrence Berkeley National Lab and NASA Ames Research Center wejohnston@lbl.gov (These slides are available at grid.lbl.gov/~wej/Grids) #12;Distributed Resources Condor Internet optical networks space-based networks Grid Communication Functions Communications BasicGrid

  1. Smart Grid: Transforming the Electric System

    SciTech Connect (OSTI)

    Widergren, Steven E.

    2010-04-13T23:59:59.000Z

    This paper introduces smart grid concepts, summarizes the status of current smart grid related efforts, and explains smart grid priorities.

  2. Sandia Energy - Smart Grid Tools and Technology

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

    Smart Grid Tools and Technology Home Stationary Power Grid Modernization Renewable Energy Integration Smart Grid Tools and Technology Smart Grid Tools and TechnologyTara...

  3. Interoperable PKI Data Distribution in Computational Grids

    SciTech Connect (OSTI)

    Pala, Massimiliano; Cholia, Shreyas; Rea, Scott A.; Smith, Sean W.

    2008-07-25T23:59:59.000Z

    One of the most successful working examples of virtual organizations, computational grids need authentication mechanisms that inter-operate across domain boundaries. Public Key Infrastructures(PKIs) provide sufficient flexibility to allow resource managers to securely grant access to their systems in such distributed environments. However, as PKIs grow and services are added to enhance both security and usability, users and applications must struggle to discover available resources-particularly when the Certification Authority (CA) is alien to the relying party. This article presents how to overcome these limitations of the current grid authentication model by integrating the PKI Resource Query Protocol (PRQP) into the Grid Security Infrastructure (GSI).

  4. Smart Grid Data Integrity Attack

    E-Print Network [OSTI]

    Poolla, Kameshwar

    2012-01-01T23:59:59.000Z

    IEEE Transactions on Smart Grid, vol. 2, no. 2, June [21] O.Malicious Data Attacks on Smart Grid State Estimation:Framework and Roadmap for Smart Grid Interoperability Stan-

  5. Smart Grid Data Integrity Attack

    E-Print Network [OSTI]

    Poolla, Kameshwar

    2012-01-01T23:59:59.000Z

    IEEE Transactions on Smart Grid, vol. 2, no. 2, June [21] O.Malicious Data Attacks on Smart Grid State Estimation:Attack and Detection in Smart Grid,” to appear in IEEE

  6. A Process Reference Model for Reuse in Industrial Engineering: Enhancing the ISO/IEC 15504 Framework to Cope with Organizational Reuse Maturity

    E-Print Network [OSTI]

    Mössenböck, Hanspeter

    A Process Reference Model for Reuse in Industrial Engineering: Enhancing the ISO/IEC 15504 in industrial engineering for solution providers is more and more recognized as a key to economic success for reuse in industrial engineering. Based on an overview and the background of the GDES-Reuse improvement

  7. A Vectorless Framework for Power Grid Electromigration Checking

    E-Print Network [OSTI]

    Najm, Farid N.

    , instead of the traditional series model. Keywords Power grid, Electromigration, Verification, Redundancy, Opti- mization 1. INTRODUCTION Power grid verification has become an essential step in modern ignored when the series model was assumed. As a result, the lifetime predicted by the series system model

  8. Smart Grid | Department of Energy

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

    Meters, Conductor, Surge Protection Devices, Connectors, Lighting Controls, Grid-Scale Battery Storage, Grid-Scale Flywheel Energy for Frequency Regulation, Automation...

  9. Sandia National Laboratories: Grid Integration

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

    News, News & Events, Renewable Energy, SMART Grid, Systems Analysis, Transmission Grid Integration, Wind Energy Sandia finalized and submitted the updated "WECC Wind Power Plant...

  10. Sandia National Laboratories: Grid Integration

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

    IEC 61400-26 Availability Standard On June 12, 2014, in Analysis, Distribution Grid Integration, Energy, Grid Integration, Infrastructure Security, News, News & Events,...

  11. Sandia National Laboratories: grid modernization

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

    grid modernization Renewables, Other Energy Issues To Be Focus of Enhanced Sandia-SINTEF Collaboration On May 28, 2014, in Biofuels, CRF, Distribution Grid Integration, Energy,...

  12. Sandia National Laboratories: SMART Grid

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

    Energy Storage Safety Workshop On April 7, 2014, in Capabilities, CINT, Distribution Grid Integration, Energy, Energy Storage, Energy Storage Systems, Facilities, Grid...

  13. Sandia National Laboratories: Grid Integration

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

    Sandia Offers Approach to Help Utilities Understand Effects of PV Variability on the Grid On March 7, 2013, in DETL, Distribution Grid Integration, Energy, Energy Surety,...

  14. Sandia National Laboratories: SMART Grid

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

    Photovoltaic Specialists (PVSC) Conference On August 14, 2013, in DETL, Distribution Grid Integration, Energy, Facilities, Grid Integration, News, News & Events, Photovoltaic,...

  15. Sandia National Laboratories: Grid Capabilities

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

    InfrastructureEnergy AssuranceGrid Capabilities Grid Capabilities Goal: To develop and implement a comprehensive Sandia program to support the modernization of the U.S. electric...

  16. Journal of Grid Computing manuscript No. (will be inserted by the editor)

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Journal of Grid Computing manuscript No. (will be inserted by the editor) Optimization of jobs submission on the EGEE production grid: modeling faults using workload. Diane Lingrand1 , Johan Montagnat1 that production grids are inherently unreliable. The aim of this work is to improve grid application performances

  17. IEEE TRANSACTIONS ON SMART GRID, VOL. 4, NO. 2, JUNE 2013 1087 Reliability Modeling and Evaluation of Power

    E-Print Network [OSTI]

    Fu, Yong

    . Based on a multiple-state Markov chain model, the failure and repair rates of power components, power transformers are in particular critical to this mission. Any minor failure, such as a fluid leak on power transformers and concluded that it is necessary to know the winding temperature in order

  18. Finite Volume schemes on unstructured grids for non-local models: Application to the simulation of heat transport in plasmas

    SciTech Connect (OSTI)

    Goudon, Thierry, E-mail: thierry.goudon@inria.fr [Team COFFEE, INRIA Sophia Antipolis Mediterranee (France) [Team COFFEE, INRIA Sophia Antipolis Mediterranee (France); Labo. J.A. Dieudonne CNRS and Univ. Nice-Sophia Antipolis (UMR 7351), Parc Valrose, 06108 Nice cedex 02 (France); Parisot, Martin, E-mail: martin.parisot@gmail.com [Project-Team SIMPAF, INRIA Lille Nord Europe, Park Plazza, 40 avenue Halley, F-59650 Villeneuve d'Ascq cedex (France)] [Project-Team SIMPAF, INRIA Lille Nord Europe, Park Plazza, 40 avenue Halley, F-59650 Villeneuve d'Ascq cedex (France)

    2012-10-15T23:59:59.000Z

    In the so-called Spitzer-Haerm regime, equations of plasma physics reduce to a nonlinear parabolic equation for the electronic temperature. Coming back to the derivation of this limiting equation through hydrodynamic regime arguments, one is led to construct a hierarchy of models where the heat fluxes are defined through a non-local relation which can be reinterpreted as well by introducing coupled diffusion equations. We address the question of designing numerical methods to simulate these equations. The basic requirement for the scheme is to be asymptotically consistent with the Spitzer-Haerm regime. Furthermore, the constraints of physically realistic simulations make the use of unstructured meshes unavoidable. We develop a Finite Volume scheme, based on Vertex-Based discretization, which reaches these objectives. We discuss on numerical grounds the efficiency of the method, and the ability of the generalized models in capturing relevant phenomena missed by the asymptotic problem.

  19. Future Grid: The Environment Future Grid Initiative White Paper

    E-Print Network [OSTI]

    Future Grid: The Environment Future Grid Initiative White Paper Power Systems Engineering Research Center Empowering Minds to Engineer the Future Electric Energy System #12;Future Grid: The Environment Prepared for the Project "The Future Grid to Enable Sustainable Energy Systems" Funded by the U

  20. GridWise Alliance

    Broader source: Energy.gov [DOE]

    Presentation—given at the Spring 2009 Federal Utility Partnership Working Group (FUPWG) meeting—discusses the GRIDWISE ALLIANCE including its mission, today and tomorrow's grid, membership, work groups, and key policy initiatives.

  1. Simulation of annual biogeochemical cycles of nutrient balance, phytoplankton bloom(s), and DO in Puget Sound using an unstructured grid model

    SciTech Connect (OSTI)

    Khangaonkar, Tarang; Sackmann, Brandon S.; Long, Wen; Mohamedali, Teizeen; Roberts, Mindy

    2012-08-14T23:59:59.000Z

    Nutrient pollution from rivers, nonpoint source runoff, and nearly 100 wastewater discharges is a potential threat to the ecological health of Puget Sound with evidence of hypoxia in some basins. However, the relative contributions of loads entering Puget Sound from natural and anthropogenic sources, and the effects of exchange flow from the Pacific Ocean are not well understood. Development of a quantitative model of Puget Sound is thus presented to help improve our understanding of the annual biogeochemical cycles in this system using the unstructured grid Finite Volume Coastal Ocean Model (FVCOM) framework and the Integrated Compartment Model (CE QUAL-ICM) water quality kinetics. Results based on 2006 data show that phytoplankton growth and die-off, succession between two species of algae, nutrient dynamics, and dissolved oxygen in Puget Sound are strongly tied to seasonal variation of temperature, solar radiation, and the annual exchange and flushing induced by upwelled Pacific Ocean waters. Concentrations in the mixed outflow surface layer occupying approximately 5?20 m of the upper water column show strong effects of eutrophication from natural and anthropogenic sources, spring and summer algae blooms, accompanied by depleted nutrients but high dissolved oxygen levels. The bottom layer reflects dissolved oxygen and nutrient concentrations of upwelled Pacific Ocean water modulated by mixing with biologically active surface outflow in the Strait of Juan De Fuca prior to entering Puget Sound over the Admiralty Inlet. The effect of reflux mixing at the Admiralty Inlet sill resulting in lower nutrient and higher dissolved oxygen levels in bottom waters of Puget Sound than the incoming upwelled Pacific Ocean water is reproduced. By late winter, with the reduction in algal activity, water column constituents of interest, were renewed and the system appeared to reset with cooler temperature, higher nutrient, and higher dissolved oxygen waters from the Pacific Ocean.

  2. Random array grid collimator

    DOE Patents [OSTI]

    Fenimore, E.E.

    1980-08-22T23:59:59.000Z

    A hexagonally shaped quasi-random no-two-holes touching grid collimator. The quasi-random array grid collimator eliminates contamination from small angle off-axis rays by using a no-two-holes-touching pattern which simultaneously provides for a self-supporting array increasng throughput by elimination of a substrate. The presentation invention also provides maximum throughput using hexagonally shaped holes in a hexagonal lattice pattern for diffraction limited applications. Mosaicking is also disclosed for reducing fabrication effort.

  3. GridLAB-D: An Agent-Based Simulation Framework for Smart Grids

    SciTech Connect (OSTI)

    Chassin, David P.; Fuller, Jason C.; Djilali, Ned

    2014-06-23T23:59:59.000Z

    Simulation of smart grid technologies requires a fundamentally new approach to integrated modeling of power systems, energy markets, building technologies, and the plethora of other resources and assets that are becoming part of modern electricity production, delivery, and consumption systems. As a result, the US Department of Energy’s Office of Electricity commissioned the development of a new type of power system simulation tool called GridLAB-D that uses an agent-based approach to simulating smart grids. This paper presents the numerical methods and approach to time-series simulation used by GridLAB-D and reviews applications in power system studies, market design, building control system design, and integration of wind power in a smart grid.

  4. GridLAB-D: An Agent-Based Simulation Framework for Smart Grids

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Chassin, David P.; Fuller, Jason C.; Djilali, Ned

    2014-01-01T23:59:59.000Z

    Simulation of smart grid technologies requires a fundamentally new approach to integrated modeling of power systems, energy markets, building technologies, and the plethora of other resources and assets that are becoming part of modern electricity production, delivery, and consumption systems. As a result, the US Department of Energy’s Office of Electricity commissioned the development of a new type of power system simulation tool called GridLAB-D that uses an agent-based approach to simulating smart grids. This paper presents the numerical methods and approach to time-series simulation used by GridLAB-D and reviews applications in power system studies, market design, building control systemmore »design, and integration of wind power in a smart grid.« less

  5. GRIDS: Grid-Scale Rampable Intermittent Dispatchable Storage

    SciTech Connect (OSTI)

    None

    2010-09-01T23:59:59.000Z

    GRIDS Project: The 12 projects that comprise ARPA-E’s GRIDS Project, short for “Grid-Scale Rampable Intermittent Dispatchable Storage,” are developing storage technologies that can store renewable energy for use at any location on the grid at an investment cost less than $100 per kilowatt hour. Flexible, large-scale storage would create a stronger and more robust electric grid by enabling renewables to contribute to reliable power generation.

  6. GridOPTICS(TM) A Novel Software Framework for Integrating Power Grid Data Storage, Management and Analysis

    SciTech Connect (OSTI)

    Gorton, Ian; Yin, Jian; Akyol, Bora A.; Ciraci, Selim; Critchlow, Terence; Liu, Yan; Gibson, Tara D.; Purohit, Sumit; Sharma, Poorva; Vlachopoulou, Maria

    2013-01-09T23:59:59.000Z

    This paper describes the architecture and design of GridOPTICSTM, a novel software framework to integrate a collection of software tools developed by PNNL’s Future Power Grid Initiative (FPGI) into a coherent, powerful operations and planning tool for the power grid of the future. GridOPTICSTM enables plug-and-play of various analysis, modeling and visualization software tools for fast and accurate control of the power grid. To bridge the data access for different control purposes, GridOPTICSTM provides a scalable and thin layer of event processing that hides the complexity of data storage and management. The initial prototype of GridOPTICSTM was demonstrated with several use cases from PNNL’s FPGI.

  7. GridStat – Cyber Security and Regional Deployment Project Report

    SciTech Connect (OSTI)

    Clements, Samuel L.

    2009-02-18T23:59:59.000Z

    GridStat is a developing communication technology to provide real-time data delivery services to the electric power grid. It is being developed in a collaborative effort between the Electrical Power Engineering and Distributed Computing Science Departments at Washington State University. Improving the cyber security of GridStat was the principle focus of this project. A regional network was established to test GridStat’s cyber security mechanisms in a realistic environment. The network consists of nodes at Pacific Northwest National Laboratory, Idaho National Laboratory, and Washington State University. Idaho National Laboratory (INL) was tasked with performing the security assessment, the results of which detailed a number or easily resolvable and previously unknown issues, as well as a number of difficult and previously known issues. Going forward we recommend additional development prior to commercialization of GridStat. The development plan is structured into three domains: Core Development, Cyber Security and Pilot Projects. Each domain contains a number of phased subtasks that build upon each other to increase the robustness and maturity of GridStat.

  8. Real Time Simulation of Power Grid Disruptions

    SciTech Connect (OSTI)

    Chinthavali, Supriya [ORNL; Dimitrovski, Aleksandar D [ORNL; Fernandez, Steven J [ORNL; Groer, Christopher S [ORNL; Nutaro, James J [ORNL; Olama, Mohammed M [ORNL; Omitaomu, Olufemi A [ORNL; Shankar, Mallikarjun [ORNL; Spafford, Kyle L [ORNL; Vacaliuc, Bogdan [ORNL

    2012-11-01T23:59:59.000Z

    DOE-OE and DOE-SC workshops (Reference 1-3) identified the key power grid problem that requires insight addressable by the next generation of exascale computing is coupling of real-time data streams (1-2 TB per hour) as the streams are ingested to dynamic models. These models would then identify predicted disruptions in time (2-4 seconds) to trigger the smart grid s self healing functions. This project attempted to establish the feasibility of this approach and defined the scientific issues, and demonstrated example solutions to important smart grid simulation problems. These objectives were accomplished by 1) using the existing frequency recorders on the national grid to establish a representative and scalable real-time data stream; 2) invoking ORNL signature identification algorithms; 3) modeling dynamically a representative region of the Eastern interconnect using an institutional cluster, measuring the scalability and computational benchmarks for a national capability; and 4) constructing a prototype simulation for the system s concept of smart grid deployment. The delivered ORNL enduring capability included: 1) data processing and simulation metrics to design a national capability justifying exascale applications; 2) Software and intellectual property built around the example solutions; 3) demonstrated dynamic models to design few second self-healing.

  9. EcoGrid EU (Smart Grid Project) | 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 JumpConceptual Model,DOEHazel Crest, Illinois: EnergyEastport, Maine:EauEcoFactor Inc Jump(Smart Grid

  10. Mature weights and lean maturing patterns of diverse breedtypes of cattle

    E-Print Network [OSTI]

    Rajab, Mohammad Hasan

    1983-01-01T23:59:59.000Z

    MATURE WEIGHTS AND LEAN MATURING PATTERNS OF DIVERSE BREEDTYPES OF CATTLE A Thesis by MOHAMMAD HASAN RAJAB Submitted to the Graduate College of Texas ABM University in partial fulfullment of the requirement for the degree of MASTER... OF SCIENCE May 1983 Major Subject: Animal Breeding MATURE WEIGHTS AND LEAN MATURING PATTERNS OF DIVERSE BREEDTYPES OF CATTLE A Thesis by MOHAMMAD HASAN RAJAB Approved as to style and content by: (Co-Chairman of Committee) Gerald M. Smith (Co...

  11. GridPACK Toolkit for Developing Power Grid Simulations on High Performance Computing Platforms

    SciTech Connect (OSTI)

    Palmer, Bruce J.; Perkins, William A.; Glass, Kevin A.; Chen, Yousu; Jin, Shuangshuang; Callahan, Charles D.

    2013-11-30T23:59:59.000Z

    This paper describes the GridPACK™ framework, which is designed to help power grid engineers develop modeling software capable of running on todays high performance computers. The framework contains modules for setting up distributed power grid networks, assigning buses and branches with arbitrary behaviors to the network, creating distributed matrices and vectors, using parallel linear and non-linear solvers to solve algebraic equations, and mapping functionality to create matrices and vectors based on properties of the network. In addition, the framework contains additional functionality to support IO and to manage errors.

  12. Physics from Angular Projection of Rectangular Grids

    E-Print Network [OSTI]

    Ashmeet Singh

    2014-12-08T23:59:59.000Z

    In this paper, we present a mathematical model for the angular projection of a rectangular arrangement of points in a grid. This simple, yet interesting problem, has both a scholarly value and applications for data extraction techniques to study the physics of various systems. Our work can interest undergraduate students to understand subtle points in the angular projection of a grid and describes various quantities of interest in the projection with completeness and sufficient rigour. We show that for certain angular ranges, the projection has non-distinctness, and calculate the details of such angles, and correspondingly, the number of distinct points and the total projected length. We focus on interesting trends obtained for the projected length of the grid elements and present a simple application of the model to determine the geometry of an unknown grid whose spatial extensions are known, using measurement of the grid projection at two angles only. Towards the end, our model is shown to have potential applications in various branches of physical sciences including crystallography, astrophysics and bulk properties of materials.

  13. Cybersecurity Capability Maturity Model - Frequently Asked Questions

    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 1,613PortsmouthBartlesvilleAbout » Contact UsDepartment of Energy Cut| Department

  14. Cybersecurity Capability Maturity Model - Frequently Asked Questions

    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 DataDepartment of Energy Your Density Isn't Your Destiny: Theof"Wave theJuly 30,Crafty Gifts| Department of Energy

  15. Sandia Energy - SMART Grid

    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 Home StationaryFAQs HomeProgramSCADASMART Grid

  16. Essential Grid Workflow Monitoring Elements

    SciTech Connect (OSTI)

    Gunter, Daniel K.; Jackson, Keith R.; Konerding, David E.; Lee,Jason R.; Tierney, Brian L.

    2005-07-01T23:59:59.000Z

    Troubleshooting Grid workflows is difficult. A typicalworkflow involves a large number of components networks, middleware,hosts, etc. that can fail. Even when monitoring data from all thesecomponents is accessible, it is hard to tell whether failures andanomalies in these components are related toa given workflow. For theGrid to be truly usable, much of this uncertainty must be elim- inated.We propose two new Grid monitoring elements, Grid workflow identifiersand consistent component lifecycle events, that will make Gridtroubleshooting easier, and thus make Grids more usable, by simplifyingthe correlation of Grid monitoring data with a particular Gridworkflow.

  17. Unlocking the smart grid

    SciTech Connect (OSTI)

    Rokach, Joshua Z.

    2010-10-15T23:59:59.000Z

    The country has progressed in a relatively short time from rotary dial phones to computers, cell phones, and iPads. With proper planning and orderly policy implementation, the same will happen with the Smart Grid. Here are some suggestions on how to proceed. (author)

  18. APEC Smart Grid Initiative

    SciTech Connect (OSTI)

    Bloyd, Cary N.

    2012-03-01T23:59:59.000Z

    This brief paper describes the activities of the Asia Pacific Economic Cooperation (APEC) Smart Grid Initiative (ASGI) which is being led by the U.S. and developed by the APEC Energy Working Group. In the paper, I describe the origin of the initiative and briefly mention the four major elements of the initiative along with existing APEC projects which support it.

  19. The Identification of Two Maturity Loci Sheds Light on Photoperiodic Flowering in Sorghum

    E-Print Network [OSTI]

    Murphy, Rebecca

    2012-10-19T23:59:59.000Z

    was found to up-regulate floral repressors while down-regulating activators, providing a mechanism of flowering control consistent with the external coincidence model. Maturity Locus 6 (Ma6) also generated interest through its genetic interaction with Ma1...

  20. The Identification of Two Maturity Loci Sheds Light on Photoperiodic Flowering in Sorghum 

    E-Print Network [OSTI]

    Murphy, Rebecca

    2012-10-19T23:59:59.000Z

    was found to up-regulate floral repressors while down-regulating activators, providing a mechanism of flowering control consistent with the external coincidence model. Maturity Locus 6 (Ma6) also generated interest through its genetic interaction with Ma1...

  1. Visual Analytics for Power Grid Contingency Analysis

    SciTech Connect (OSTI)

    Wong, Pak C.; Huang, Zhenyu; Chen, Yousu; Mackey, Patrick S.; Jin, Shuangshuang

    2014-01-20T23:59:59.000Z

    Contingency analysis is the process of employing different measures to model scenarios, analyze them, and then derive the best response to remove the threats. This application paper focuses on a class of contingency analysis problems found in the power grid management system. A power grid is a geographically distributed interconnected transmission network that transmits and delivers electricity from generators to end users. The power grid contingency analysis problem is increasingly important because of both the growing size of the underlying raw data that need to be analyzed and the urgency to deliver working solutions in an aggressive timeframe. Failure to do so may bring significant financial, economic, and security impacts to all parties involved and the society at large. The paper presents a scalable visual analytics pipeline that transforms about 100 million contingency scenarios to a manageable size and form for grid operators to examine different scenarios and come up with preventive or mitigation strategies to address the problems in a predictive and timely manner. Great attention is given to the computational scalability, information scalability, visual scalability, and display scalability issues surrounding the data analytics pipeline. Most of the large-scale computation requirements of our work are conducted on a Cray XMT multi-threaded parallel computer. The paper demonstrates a number of examples using western North American power grid models and data.

  2. Sandia National Laboratories: International Smart Grid Action...

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

    Smart Grid Action Network Mesa del Sol Project Is Finalist for International Smart Grid Action Network 2014 Award of Excellence On July 31, 2014, in Distribution Grid Integration,...

  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. Networked Loads in the Distribution Grid

    E-Print Network [OSTI]

    Wang, Zhifang; Li, Xiao; Muthukumar, Vishak; Scaglione, Anna; Peisert, Sean; McParland, Chuck

    2012-01-01T23:59:59.000Z

    Lu, and Deborah A. Frincke. Smart-Grid Security Issues. IEEELoads in the Distribution Grid Zhifang Wang ? , Xiao Li † ,Transformer   sensors   Grid   Cyber  system   Cooling    

  5. Flexible Transmission in the Smart Grid

    E-Print Network [OSTI]

    Hedman, Kory Walter

    2010-01-01T23:59:59.000Z

    New England Outlook: Smart Grid is About Consumers,” Apr. [Transmission in the Smart Grid By Kory Walter Hedman ATransmission in the Smart Grid by Kory Walter Hedman Doctor

  6. Smart Grid | Department of Energy

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

    Energy Usage Smart Grid Smart Grid October 21, 2014 Line workers get hands-on experience with an electrical pole as part of their training. | Photo courtesy of David Weaver....

  7. Stability of elastic grid shells

    E-Print Network [OSTI]

    Mesnil, Romain, M. Eng. Massachusetts Institute of Technology

    2013-01-01T23:59:59.000Z

    The elastic grid shell is a solution that combines double curvature and ease of mounting. This structural system, based on the deformation of an initially at grid without shear stiffness was invented more than fifty years ...

  8. Modern Grid Initiative Distribution Taxonomy Final Report

    SciTech Connect (OSTI)

    Schneider, Kevin P.; Chen, Yousu; Chassin, David P.; Pratt, Robert G.; Engel, David W.; Thompson, Sandra E.

    2008-11-01T23:59:59.000Z

    This is the final report for the development of a toxonomy of prototypical electrical distribution feeders. Two of the primary goals of the Department of Energy's (DOE) Modern Grid Initiative (MGI) are 'to accelerate the modernization of our nation's electricity grid' and to 'support demonstrations of systems of key technologies that can serve as the foundation for an integrated, modern power grid'. A key component to the realization of these goals is the effective implementation of new, as well as existing, 'smart grid technologies'. Possibly the largest barrier that has been identified in the deployment of smart grid technologies is the inability to evaluate how their deployment will affect the electricity infrastructure, both locally and on a regional scale. The inability to evaluate the impacts of these technologies is primarily due to the lack of detailed electrical distribution feeder information. While detailed distribution feeder information does reside with the various distribution utilities, there is no central repository of information that can be openly accessed. The role of Pacific Northwest National Laboratory (PNNL) in the MGI for FY08 was to collect distribution feeder models, in the SynerGEE{reg_sign} format, from electric utilities around the nation so that they could be analyzed to identify regional differences in feeder design and operation. Based on this analysis PNNL developed a taxonomy of 24 prototypical feeder models in the GridLAB-D simulations environment that contain the fundamental characteristics of non-urban core, radial distribution feeders from the various regions of the U.S. Weighting factors for these feeders are also presented so that they can be used to generate a representative sample for various regions within the United States. The final product presented in this report is a toolset that enables the evaluation of new smart grid technologies, with the ability to aggregate their effects to regional and national levels. The distribution feeder models presented in this report are based on actual utility models but do not contain any proprietary or system specific information. As a result, the models discussed in this report can be openly distributed to industry, academia, or any interested entity, in order to facilitate the ability to evaluate smart grid technologies.

  9. ECE 5332 Communications and Control in Smart Grid Syllabus Instructor

    E-Print Network [OSTI]

    Mohsenian-Rad, Hamed

    Microgrid Architecture o Tackling Intermittency o Stochastic Models and Forecasting o Distributed Storage, distributed storage, vehicle-to-grid systems, wide area measurement, smart grid cyber security, etc. Course Topics: · Basics of Power Systems: o Load and Generation o Power Flow Analysis o Economic Dispatch

  10. ORIGINAL RESEARCH PAPER Gridding heterogeneous bathymetric data sets with stacked

    E-Print Network [OSTI]

    Jakobsson, Martin

    heterogeneous bathymetric data sets for the compilation of Digital bathymetric models (DBMs), poses specific of the most widely used gridding methods, our approach yields superior DBMs based on heterogeneous bathymetric gridding algorithm has been specifically designed to con- struct DBMs from heterogeneous bathymetric source

  11. Replica Management and Optimisation for Data Grids

    E-Print Network [OSTI]

    Glasgow, University of

    - ments. A strategy to optimise data access based on an economic model for #12;le trading is introducedReplica Management and Optimisation for Data Grids David Gordon Cameron Department of Physics-handling requirements of the next generation of high energy physics experiments. This emerging paradigm enables

  12. FUTURE POWER GRID INITIATIVE Future Power Grid

    E-Print Network [OSTI]

    and WECC model » Prototyping proposed control strategy utilizing high performance computing (HPC) APPROACH

  13. Cloud Computing for the Grid: GridControl: A Software Platform to Support the Smart Grid

    SciTech Connect (OSTI)

    None

    2012-02-08T23:59:59.000Z

    GENI Project: Cornell University is creating a new software platform for grid operators called GridControl that will utilize cloud computing to more efficiently control the grid. In a cloud computing system, there are minimal hardware and software demands on users. The user can tap into a network of computers that is housed elsewhere (the cloud) and the network runs computer applications for the user. The user only needs interface software to access all of the cloud’s data resources, which can be as simple as a web browser. Cloud computing can reduce costs, facilitate innovation through sharing, empower users, and improve the overall reliability of a dispersed system. Cornell’s GridControl will focus on 4 elements: delivering the state of the grid to users quickly and reliably; building networked, scalable grid-control software; tailoring services to emerging smart grid uses; and simulating smart grid behavior under various conditions.

  14. Maturing Software Engineering Knowledge through Classifications

    E-Print Network [OSTI]

    Basili, Victor R.

    Maturing Software Engineering Knowledge through Classifications: A Case Study on Unit Testing contribution to advancing knowledge in both science and engineering. It is a way of investigating Engineering knowledge, as classifications constitute an organized structure of knowledge items. Till date

  15. Coordinated learning of grid cell and place cell spatial and temporal properties: Multiple scales, attention, and oscillations

    E-Print Network [OSTI]

    Spence, Harlan Ernest

    self-organizing map mechanisms can learn grid cell and place cell receptive fields; and the learning mechanisms may stabilize map learning, simulates how hippocampal inactivation may disrupt grid cells of grid cell models in light of recent data. Key words: grid cells; place cells; self-organizing map

  16. Principal Characteristics of a Modern Grid

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

    Electricity Initiative GridWise Alliance GridWise Architecture Council European SmartGrid Technology Platform 19 MODERN GRID S T R A T E G Y Questions? Office of Electricity...

  17. Grid Transfer Remark 4.1 Contents of this chapter. Consider a grid with grid size h and the

    E-Print Network [OSTI]

    John, Volker

    Chapter 4 Grid Transfer Remark 4.1 Contents of this chapter. Consider a grid with grid size h that there might be an iterative method for solving this system efficiently, which uses also coarser grids way between the grids. 2 4.1 The Coarse Grid System and the Residual Equa- tion Remark 4.2 Basic idea

  18. Structure, Function and Dynamics in Adenovirus Maturation

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Mangel, Walter F.; San Martin, Carmen

    2014-11-01T23:59:59.000Z

    Here we review the current knowledge on maturation of adenovirus, a non-enveloped icosahedral eukaryotic virus. The adenovirus dsDNA genome fills the capsid in complex with a large amount of histone-like viral proteins, forming the core. Maturation involves proteolytic cleavage of several capsid and core precursor proteins by the viral protease (AVP). AVP uses a peptide cleaved from one of its targets as a “molecular sled” to slide on the viral genome and reach its substrates, in a remarkable example of one-dimensional chemistry. Immature adenovirus containing the precursor proteins lacks infectivity because of its inability to uncoat. The immature core ismore »more compact and stable than the mature one, due to the condensing action of unprocessed core polypeptides; shell precursors underpin the vertex region and the connections between capsid and core. Maturation makes the virion metastable, priming it for stepwise uncoating by facilitating vertex release and loosening the condensed genome and its attachment to the icosahedral shell. The packaging scaffold protein L1 52/55k is also a substrate for AVP. Proteolytic processing of L1 52/55k disrupts its interactions with other virion components, providing a mechanism for its removal during maturation. Finally, possible roles for maturation of the terminal protein are discussed.« less

  19. Structure, Function and Dynamics in Adenovirus Maturation

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Mangel, Walter F. [Brookhaven National Laboratory (BNL), Upton, NY (United States); San Martin, Carmen [Dept. of Macromolecular Structure and NanoBiomedicine Initiative, Centro Nacional de Biotecnología (CNB-CSIC), Madrid (Spain)

    2014-11-01T23:59:59.000Z

    Here we review the current knowledge on maturation of adenovirus, a non-enveloped icosahedral eukaryotic virus. The adenovirus dsDNA genome fills the capsid in complex with a large amount of histone-like viral proteins, forming the core. Maturation involves proteolytic cleavage of several capsid and core precursor proteins by the viral protease (AVP). AVP uses a peptide cleaved from one of its targets as a “molecular sled” to slide on the viral genome and reach its substrates, in a remarkable example of one-dimensional chemistry. Immature adenovirus containing the precursor proteins lacks infectivity because of its inability to uncoat. The immature core is more compact and stable than the mature one, due to the condensing action of unprocessed core polypeptides; shell precursors underpin the vertex region and the connections between capsid and core. Maturation makes the virion metastable, priming it for stepwise uncoating by facilitating vertex release and loosening the condensed genome and its attachment to the icosahedral shell. The packaging scaffold protein L1 52/55k is also a substrate for AVP. Proteolytic processing of L1 52/55k disrupts its interactions with other virion components, providing a mechanism for its removal during maturation. Finally, possible roles for maturation of the terminal protein are discussed.

  20. Sandia Energy - SMART Grid

    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 PossibleRadiationImplementing Nonlinear757Kelley RuehlReportPeter H.Rohit Prasankumar

  1. Optimal response to attacks on the open science grids.

    SciTech Connect (OSTI)

    Altunay, M.; Leyffer, S.; Linderoth, J. T.; Xie, Z. (Mathematics and Computer Science); (FNAL); (Univ. of Wisconsin at Madison)

    2011-01-01T23:59:59.000Z

    Cybersecurity is a growing concern, especially in open grids, where attack propagation is easy because of prevalent collaborations among thousands of users and hundreds of institutions. The collaboration rules that typically govern large science experiments as well as social networks of scientists span across the institutional security boundaries. A common concern is that the increased openness may allow malicious attackers to spread more readily around the grid. We consider how to optimally respond to attacks in open grid environments. To show how and why attacks spread more readily around the grid, we first discuss how collaborations manifest themselves in the grids and form the collaboration network graph, and how this collaboration network graph affects the security threat levels of grid participants. We present two mixed-integer program (MIP) models to find the optimal response to attacks in open grid environments, and also calculate the threat level associated with each grid participant. Given an attack scenario, our optimal response model aims to minimize the threat levels at unaffected participants while maximizing the uninterrupted scientific production (continuing collaborations). By adopting some of the collaboration rules (e.g., suspending a collaboration or shutting down a site), the model finds optimal response to subvert an attack scenario.

  2. Impact of network topology on synchrony of oscillatory power grids

    SciTech Connect (OSTI)

    Rohden, Martin; Sorge, Andreas; Witthaut, Dirk [Network Dynamics, Max Planck Institute for Dynamics and Self-Organization (MPIDS), 37077 Göttingen (Germany)] [Network Dynamics, Max Planck Institute for Dynamics and Self-Organization (MPIDS), 37077 Göttingen (Germany); Timme, Marc [Network Dynamics, Max Planck Institute for Dynamics and Self-Organization (MPIDS), 37077 Göttingen (Germany) [Network Dynamics, Max Planck Institute for Dynamics and Self-Organization (MPIDS), 37077 Göttingen (Germany); Faculty of Physics, Georg August Universität Göttingen, Göttingen (Germany)

    2014-03-15T23:59:59.000Z

    Replacing conventional power sources by renewable sources in current power grids drastically alters their structure and functionality. In particular, power generation in the resulting grid will be far more decentralized, with a distinctly different topology. Here, we analyze the impact of grid topologies on spontaneous synchronization, considering regular, random, and small-world topologies and focusing on the influence of decentralization. We model the consumers and sources of the power grid as second order oscillators. First, we analyze the global dynamics of the simplest non-trivial (two-node) network that exhibit a synchronous (normal operation) state, a limit cycle (power outage), and coexistence of both. Second, we estimate stability thresholds for the collective dynamics of small network motifs, in particular, star-like networks and regular grid motifs. For larger networks, we numerically investigate decentralization scenarios finding that decentralization itself may support power grids in exhibiting a stable state for lower transmission line capacities. Decentralization may thus be beneficial for power grids, regardless of the details of their resulting topology. Regular grids show a specific sharper transition not found for random or small-world grids.

  3. Dealing with Uncertainty in the Smart Grid: A Learning Game Approach

    E-Print Network [OSTI]

    Dealing with Uncertainty in the Smart Grid: A Learning Game Approach Hélène Le Cadre Jean-Sébastien Bedo Abstract In this article, the smart grid is modeled as a decentralized and hierarchical network such as renewables. These predictions will then be used as inputs to optimize the smart grid operations [2

  4. Communication Capacity Requirement for Reliable and Secure State Estimation in Smart Grid

    E-Print Network [OSTI]

    Qiu, Robert Caiming

    1 Communication Capacity Requirement for Reliable and Secure State Estimation in Smart Grid Husheng, Cookeville, TN Abstract-- Secure system state estimation is an important issue in smart grid to assure the information the- oretic perspective. The smart grid is modeled as a linear dynamic system. Then, the channel

  5. False Data Injection Attacks against State Estimation in Electric Power Grids

    E-Print Network [OSTI]

    Qiu, Robert Caiming

    @cs.unc.edu Abstract--A power grid is a complex system connecting electric power generators to consumers through power estimate the power grid state through analysis of meter measure- ments and power system models. Various malicious attacks. I. INTRODUCTION A power grid is a complex system connecting a variety of electric power

  6. Grid Cell Mechanisms and Function: Contributions of Entorhinal Persistent Spiking and Phase Resetting

    E-Print Network [OSTI]

    Hasselmo, Michael

    Grid Cell Mechanisms and Function: Contributions of Entorhinal Persistent Spiking and Phase Resetting Michael E. Hasselmo* ABSTRACT: This article presents a model of grid cell firing based. The convergence of input from different persistent firing neurons causes spiking in a grid cell only when

  7. A high-resolution mapped grid algorithm for compressible multiphase flow problems

    E-Print Network [OSTI]

    Shyue, Keh-Ming

    A high-resolution mapped grid algorithm for compressible multiphase flow problems K.-M. Shyue 18 August 2010 Keywords: Compressible multiphase flow Fluid-mixture model Mapped grids Wave-propagation method Stiffened gas equation of state a b s t r a c t We describe a simple mapped-grid approach

  8. Massive Science with VO and Grids

    E-Print Network [OSTI]

    Robert Nichol; Garry Smith; Christopher Miller; Peter Freeman; Chris Genovese; Larry Wasserman; Brent Bryan; Alexander Gray; Jeff Schneider; Andrew Moore

    2005-10-31T23:59:59.000Z

    There is a growing need for massive computational resources for the analysis of new astronomical datasets. To tackle this problem, we present here our first steps towards marrying two new and emerging technologies; the Virtual Observatory (e.g, AstroGrid) and the computational grid (e.g. TeraGrid, COSMOS etc.). We discuss the construction of VOTechBroker, which is a modular software tool designed to abstract the tasks of submission and management of a large number of computational jobs to a distributed computer system. The broker will also interact with the AstroGrid workflow and MySpace environments. We discuss our planned usages of the VOTechBroker in computing a huge number of n-point correlation functions from the SDSS data and massive model-fitting of millions of CMBfast models to WMAP data. We also discuss other applications including the determination of the XMM Cluster Survey selection function and the construction of new WMAP maps.

  9. Data Management in the GridRPC GridRPC Data Management API

    E-Print Network [OSTI]

    Caniou, Yves

    Data Management in the GridRPC Issues Conclusion GridRPC Data Management API Implementations, Le Mahec, Nakada GridRPC DM API: Implem. and Interop. Issues (1/13) #12;Data Management in the GridRPC Issues Conclusion Goal GridRPC DM types: Reminder 1 Data Management in the GridRPC Goal GridRPC DM types

  10. Grid Interaction Tech Team, and International Smart Grid Collaboration

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

    Provider BAHNHOF POTSDAMER PLATZ Home Area Network (HAN) Grid Operations Coal Natural Gas Nuclear Hydro Renewable Fuel Oil Misc Generation Energy Service Interface (ESI)...

  11. Sandia Energy - Grid Modernization

    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 for4,645 3,625 1,006 492 742EnergyOnItemResearch > TheNuclear Press ReleasesInAppliedEnergyGeothermal HomeGrid

  12. Sandia Energy - Grid Integration

    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 Scienceand RequirementsCoatingsUltra-High-Voltage SiliconEnergyFailureGlobal ClimateGrid

  13. Grid-based Production

    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) Environmental AssessmentsGeoffrey(SC)Graphite ReactorGregGrid-Connected

  14. Sharing Smart Grid Experiences

    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 Our Instagram Secretary Moniz9 SeptemberSetting the StageCanon! Shared Solar:Sharing

  15. Sandia Energy - Grid Integration

    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 PossibleRadiationImplementing Nonlinear757 (1)Tara46EnergyPower SystemsCarbon CaptureBiofuels

  16. Sandia Energy - Grid Integration

    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 PossibleRadiationImplementing Nonlinear757 (1)Tara46EnergyPower SystemsCarbon

  17. Sandia Energy - Grid Integration

    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 PossibleRadiationImplementing Nonlinear757 (1)Tara46EnergyPower SystemsCarbonEnergy Sandia

  18. Sandia Energy - SMART Grid

    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 PossibleRadiationImplementing Nonlinear757Kelley RuehlReportPeter H.Rohit Prasankumar HomeEnergy

  19. GridPV

    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 AdministrationField8,Dist.NewofGeothermal Heaton Armed Services U.S.GregoryGrid6733

  20. GridPV

    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 AdministrationField8,Dist.NewofGeothermal Heaton Armed Services U.S.GregoryGrid6733141

  1. NERSC Grid Certificates

    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 Codes |IsLove Your1AllocationsNOVA Portal: Submit2014 NERSCFranklinGrid

  2. Coordinated Variable Structure Switching Attacks for Smart Grid

    E-Print Network [OSTI]

    Liu, Shan

    2013-02-11T23:59:59.000Z

    or more relays and circuit breakers of a power system to disrupt operation. Existence of this switching vulnerability is dependent on the local structure of the power grid. Variable structure systems theory is employed to effectively model the cyber...

  3. Virtual Private Environments for Multiphysics Code Validation on Computing Grids

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Virtual Private Environments for Multiphysics Code Validation on Computing Grids Toan Nguyen-based computing environments and deploys, tests and analyzes multiphysics codes. A second approach executes model coupling, error correlations, alert definitions, best usage practices, code verification and code

  4. Grid Integration of Robotic Telescopes

    E-Print Network [OSTI]

    F. Breitling; T. Granzer; H. Enke

    2009-03-23T23:59:59.000Z

    Robotic telescopes and grid technology have made significant progress in recent years. Both innovations offer important advantages over conventional technologies, particularly in combination with one another. Here, we introduce robotic telescopes used by the Astrophysical Institute Potsdam as ideal instruments for building a robotic telescope network. We also discuss the grid architecture and protocols facilitating the network integration that is being developed by the German AstroGrid-D project. Finally, we present three user interfaces employed for this purpose.

  5. Cascade Failures from Distributed Generation in Power Grids

    E-Print Network [OSTI]

    Scala, Antonio; Scoglio, Caterina

    2012-01-01T23:59:59.000Z

    Power grids are nowadays experiencing a transformation due to the introduction of Distributed Generation based on Renewable Sources. At difference with classical Distributed Generation, where local power sources mitigate anomalous user consumption peaks, Renewable Sources introduce in the grid intrinsically erratic power inputs. By introducing a simple schematic (but realistic) model for power grids with stochastic distributed generation, we study the effects of erratic sources on the robustness of several IEEE power grid test networks with up to 2000 buses. We find that increasing the penetration of erratic sources causes the grid to fail with a sharp transition. We compare such results with the case of failures caused by the natural increasing power demand.

  6. Smart Grid Enabled EVSE

    SciTech Connect (OSTI)

    None, None

    2014-10-15T23:59:59.000Z

    The combined team of GE Global Research, Federal Express, National Renewable Energy Laboratory, and Consolidated Edison has successfully achieved the established goals contained within the Department of Energy’s Smart Grid Capable Electric Vehicle Supply Equipment funding opportunity. The final program product, shown charging two vehicles in Figure 1, reduces by nearly 50% the total installed system cost of the electric vehicle supply equipment (EVSE) as well as enabling a host of new Smart Grid enabled features. These include bi-directional communications, load control, utility message exchange and transaction management information. Using the new charging system, Utilities or energy service providers will now be able to monitor transportation related electrical loads on their distribution networks, send load control commands or preferences to individual systems, and then see measured responses. Installation owners will be able to authorize usage of the stations, monitor operations, and optimally control their electricity consumption. These features and cost reductions have been developed through a total system design solution.

  7. Sandia Energy - Modeling

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

    Sandia Will Host PV Bankability Workshop at Solar Power International (SPI) 2013 Computational Modeling & Simulation, Distribution Grid Integration, Energy, Facilities, Grid...

  8. LED Lighting Off the Grid

    Energy Savers [EERE]

    D. & Kammen, D. M. Decentralized energy systems for clean electricity access. Nature Climate Change accepted, in press, (2015). Off-Grid Status Quo : Fuel Based Lighting...

  9. 2014 Modern Power Grid Video

    SciTech Connect (OSTI)

    None

    2014-06-02T23:59:59.000Z

    A video from NETL that describes the details of a modern power grid and how it can help our nation save on energy costs.

  10. Buildings to Grid Integration & Interoperability

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

    Buildings to Grid Integration & Interoperability Joe Hagerman, Senior Advisor DOE Building Technologies Office March 11, 2013 EERE: Office of Energy Efficiency and Renewable Energy...

  11. Smart Grid Data Integrity Attack

    E-Print Network [OSTI]

    Poolla, Kameshwar

    2012-01-01T23:59:59.000Z

    Against Data Injection Attacks on Power Grids”, IEEER. Thomas, and L. Tong, “Malicious Data Attacks on SmartState Estimation: Attack Strategies and Countermeasures,”

  12. National Grid Energy Efficiency Plans

    Broader source: Energy.gov [DOE]

    Presentation covers the National Grid Energy Efficiency plans and is given at the Spring 2010 Federal Utility Partnership Working Group (FUPWG) meeting in Providence, Rhode Island.

  13. National Grid Energy Efficiency Programs

    Broader source: Energy.gov [DOE]

    Presentation covers the National Grid Energy Efficiency programs and is given at the Spring 2010 Federal Utility Partnership Working Group (FUPWG) meeting in Providence, Rhode Island.

  14. Environmental Impacts of Smart Grid

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

    a substantial number of pollutants. This paper focuses on the particulate and gaseous emission pollutants that are byproducts of electricity generation, and on how the Smart Grid...

  15. Sandia Energy - Smart Grid Technologies

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

    reliability, efficiency, flexibility, and cost effectiveness. Smart-grid features include demand-response capabilities, advanced controls, DER integration, increased situational...

  16. 2014 Modern Power Grid Video

    ScienceCinema (OSTI)

    None

    2014-07-22T23:59:59.000Z

    A video from NETL that describes the details of a modern power grid and how it can help our nation save on energy costs.

  17. Smart-Grid Security Issues

    SciTech Connect (OSTI)

    Khurana, Himanshu; Hadley, Mark D.; Lu, Ning; Frincke, Deborah A.

    2010-01-29T23:59:59.000Z

    TITLE: Smart-Grid Security Issues (Editorial Material, English) IEEE SECURITY & PRIVACY 8 (1). JAN-FEB 2010. p.81-85 IEEE COMPUTER SOC, LOS ALAMITOS

  18. High-Performance Computing for Advanced Smart Grid Applications

    SciTech Connect (OSTI)

    Huang, Zhenyu; Chen, Yousu

    2012-07-06T23:59:59.000Z

    The power grid is becoming far more complex as a result of the grid evolution meeting an information revolution. Due to the penetration of smart grid technologies, the grid is evolving as an unprecedented speed and the information infrastructure is fundamentally improved with a large number of smart meters and sensors that produce several orders of magnitude larger amounts of data. How to pull data in, perform analysis, and put information out in a real-time manner is a fundamental challenge in smart grid operation and planning. The future power grid requires high performance computing to be one of the foundational technologies in developing the algorithms and tools for the significantly increased complexity. New techniques and computational capabilities are required to meet the demands for higher reliability and better asset utilization, including advanced algorithms and computing hardware for large-scale modeling, simulation, and analysis. This chapter summarizes the computational challenges in smart grid and the need for high performance computing, and present examples of how high performance computing might be used for future smart grid operation and planning.

  19. Sensor Grid: Integration of Wireless Sensor Networks and the Grid

    E-Print Network [OSTI]

    Teo, Yong-Meng

    Sensor Grid: Integration of Wireless Sensor Networks and the Grid Hock Beng Lim1 , Yong Meng Teo1 Microsystems, Inc. E-mail: [limhb, teoym]@comp.nus.edu.sg Abstract Wireless sensor networks have emerged to the sharing of sensor resources in wireless sensor networks. There are several issues and challenges

  20. Enhancing Power Grid Stability through Analytics

    E-Print Network [OSTI]

    Lakoba, Taras I.

    the "Smart" Grid? · Premise #1: the grid has long been pretty smart (Edison, Tesla, Steinmetz et al were of Vermont Seminar October 23, 2013 3 What Drives the "Smart" Grid? · Premise #2: As well operated as grid of Vermont Seminar October 23, 2013 4 What Drives the "Smart" Grid? · Premise #3: new technology is providing

  1. 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.

  2. Case Study of Maturing and Reusing

    E-Print Network [OSTI]

    Christensen, Henrik Bærbak

    Case Study of Maturing and Reusing a Framework COT/3-32-V1.0 C O T * Centre for Object Technology concerned with research, application and implementation of object technology in Danish companies-data, Rambøll, Danfoss, Systematic Software Engineering, Odense Steel Shipyard, A.P. Møller, University

  3. GridWise Alliance: Smart Grid RFI: Addressing Policy and Logistical...

    Office of Environmental Management (EM)

    Challenges More Documents & Publications QER - Comment of GridWise Alliance 1 SmartGrid Consortium: Smart Grid Roadmap for the State of New York Smart Grid: Enabler of the...

  4. Grid Integration and the Carrying Capacity of the U.S. Grid to...

    Energy Savers [EERE]

    Grid Integration and the Carrying Capacity of the U.S. Grid to Incorporate Variable Renewable Energy Grid Integration and the Carrying Capacity of the U.S. Grid to Incorporate...

  5. The Sandia MEMS passive shock sensor : FY07 maturation activities.

    SciTech Connect (OSTI)

    Houston, Jack E.; Blecke, Jill; Mitchell, John Anthony; Wittwer, Jonathan W.; Crowson, Douglas A.; Clemens, Rebecca C.; Walraven, Jeremy Allen; Epp, David S.; Baker, Michael Sean

    2008-08-01T23:59:59.000Z

    This report describes activities conducted in FY07 to mature the MEMS passive shock sensor. The first chapter of the report provides motivation and background on activities that are described in detail in later chapters. The second chapter discusses concepts that are important for integrating the MEMS passive shock sensor into a system. Following these two introductory chapters, the report details modeling and design efforts, packaging, failure analysis and testing and validation. At the end of FY07, the MEMS passive shock sensor was at TRL 4.

  6. Interoperable and Secure Communication for Cyber Physical Systems in the Energy Grid

    E-Print Network [OSTI]

    Lee, Eun Kyu

    2014-01-01T23:59:59.000Z

    twiki-sggrid/bin/view/SmartGrid/ SGIPSemanticModelSGAC. [4]periods [42]. http://www.iec.ch/smartgrid/standards/ http://

  7. INFOGRAPHIC: Understanding the Grid | Department of Energy

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

    can I participate? Send us your questions about how the grid works using GridWeek on Facebook, Twitter and Google+. Join the GridWeek Twitter chat on Thursday, November 20 at 2PM...

  8. Embodied Energy and Off-Grid Lighting

    E-Print Network [OSTI]

    Alstone, Peter

    2012-01-01T23:59:59.000Z

    Life Cycle Assessment of Off-Grid Lighting Applications:Testing for Emerging Off-grid White-LED Illumination SystemsBudget: The Economics of Off-Grid Lighting for Small

  9. Artificial Intelligence for the Smart Grid

    E-Print Network [OSTI]

    Artificial Intelligence for the Smart Grid NICTA is developing technology to automate costs. The Future · Cover more of Smart Grid control (diagnosis, reconfiguration, protection, voltage) products for the Smart Grid. Contact Details: Technical Jussi Rintanen Canberra Research Laboratory Tel

  10. Parametrization-independent elliptic surface grid generation

    E-Print Network [OSTI]

    Rasmussen, Britt Bille

    2009-01-01T23:59:59.000Z

    The generation of computational grids on surfaces of three-dimensional configurations is an important component of many areas of computational research, both as a boundary grid for volume grid generation or to perform ...

  11. Considering Prefabulous and Almost Off the Grid

    E-Print Network [OSTI]

    Grenier, Lotus; Beba, Zoe; Gray, Art

    2013-01-01T23:59:59.000Z

    Prefabulous and Almost Off the Grid Introduction Two recentPrefabulous and Almost Off the Grid by Sheri Koones In herand Almost O?fz‘/Je Grid (Abrams, 2012), Sheri Koones pro?

  12. Design of High-Fidelity Testing Framework for Secure Electric Grid Control

    SciTech Connect (OSTI)

    Yoginath, Srikanth B [ORNL; Perumalla, Kalyan S [ORNL

    2014-01-01T23:59:59.000Z

    A solution methodology and implementation components are presented that can uncover unwanted, unintentional or unanticipated effects on electric grids from changes to actual electric grid control software. A new design is presented to leapfrog over the limitations of current modeling and testing techniques for cyber technologies in electric grids. We design a fully virtualized approach in which actual, unmodified operational software under test is enabled to interact with simulated surrogates of electric grids. It enables the software to influence the (simulated) grid operation and vice versa in a controlled, high fidelity environment. Challenges in achieving such capability include achieving low-overhead time control mechanisms in hypervisor schedulers, network capture and time-stamping, translation of network packets emanating from grid software into discrete events of virtual grid models, translation back from virtual sensors/actuators into data packets to control software, and transplanting the entire system onto an accurately and efficiently maintained virtual-time plane.

  13. Smart Grid Status and Metrics Report

    SciTech Connect (OSTI)

    Balducci, Patrick J.; Weimar, Mark R.; Kirkham, Harold

    2014-07-01T23:59:59.000Z

    To convey progress made in achieving the vision of a smart grid, this report uses a set of six characteristics derived from the National Energy Technology Laboratory Modern Grid Strategy. It measures 21 metrics to provide insight into the grid’s capacity to embody these characteristics. This report looks across a spectrum of smart grid concerns to measure the status of smart grid deployment and impacts.

  14. National Smart Water Grid

    SciTech Connect (OSTI)

    Beaulieu, R A

    2009-07-13T23:59:59.000Z

    The United States repeatedly experiences floods along the Midwest's large rivers and droughts in the arid Western States that cause traumatic environmental conditions with huge economic impact. With an integrated approach and solution these problems can be alleviated. Tapping into the Mississippi River and its tributaries, the world's third largest fresh water river system, during flood events will mitigate the damage of flooding and provide a new source of fresh water to the Western States. The trend of increased flooding on the Midwest's large rivers is supported by a growing body of scientific literature. The Colorado River Basin and the western states are experiencing a protracted multi-year drought. Fresh water can be pumped via pipelines from areas of overabundance/flood to areas of drought or high demand. Calculations document 10 to 60 million acre-feet (maf) of fresh water per flood event can be captured from the Midwest's Rivers and pumped via pipelines to the Colorado River and introduced upstream of Lake Powell, Utah, to destinations near Denver, Colorado, and used in areas along the pipelines. Water users of the Colorado River include the cities in southern Nevada, southern California, northern Arizona, Colorado, Utah, Indian Tribes, and Mexico. The proposed start and end points, and routes of the pipelines are documented, including information on right-of-ways necessary for state and federal permits. A National Smart Water Grid{trademark} (NSWG) Project will create thousands of new jobs for construction, operation, and maintenance and save billions in drought and flood damage reparations tax dollars. The socio-economic benefits of NWSG include decreased flooding in the Midwest; increased agriculture, and recreation and tourism; improved national security, transportation, and fishery and wildlife habitats; mitigated regional climate change and global warming such as increased carbon capture; decreased salinity in Colorado River water crossing the US-Mexico border; and decreased eutrophication (excessive plant growth and decay) in the Gulf of Mexico to name a few. The National Smart Water Grid{trademark} will pay for itself in a single major flood event.

  15. Sandia Energy - Grid Cyber Vulnerability & Assessments

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

    Consequences and Impacts It's important to recognize that adopting these advanced grid-control technologies doesn't just have the potential to increase power grid reliability...

  16. Protecting Intelligent Distributed Power Grids Against Cyber...

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

    will help protect intelligent distributed power grids from cyber attacks. Intelligent power grids are interdependent energy management systems-encompassing generation,...

  17. Sandia National Laboratories: energy resilient smart grid

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

    resilient smart grid Hoboken Hopes To Reduce Power Outages With New 'Smart Grid' System On June 20, 2013, in Energy, Energy Assurance, Energy Storage, Energy Storage Systems,...

  18. Conference Proceedings Available - The Smart Grid Experience...

    Energy Savers [EERE]

    the Grid Through Integration Conservation and Optimization via VoltVar Control Systems Driving the Integrated Grid - Including DMS, DA, DERMS, DRMS Communications and Cyber...

  19. Tribal Renewable Energy Foundational Course: Electricity Grid...

    Office of Environmental Management (EM)

    Electricity Grid Basics Tribal Renewable Energy Foundational Course: Electricity Grid Basics Watch the U.S. Department of Energy Office of Indian Energy foundational course webinar...

  20. Principal Characteristics of a Modern Grid

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

    Self heals - acts as the grid's "immune system" Supports grid reliability, security, and power quality Today Tomorrow Protects assets following disruption (e.g. trip relay)...

  1. Principal Characteristics of a Modern Grid

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

    Modern Grid Wisconsin Public Utility Institute and UW Energy Institute Joe Miller, Steve Pullins, Steve Bossart - Modern Grid Team April 29, 2008 1 Conducted by the National Energy...

  2. Sandia National Laboratories: Distribution Grid Integration

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

    Energy Supply Transformation Needed On February 20, 2013, in DETL, Distribution Grid Integration, Energy, Energy Assurance, Energy Surety, Grid Integration, Infrastructure...

  3. Sandia National Laboratories: Distribution Grid Integration

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

    Its Phase 1 Operational Demonstration in Late January On April 5, 2013, in Distribution Grid Integration, Energy Assurance, Energy Assurance, Energy Surety, Grid Integration,...

  4. Sandia National Laboratories: Distribution Grid Integration

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

    Distribution Grid Integration Recent Sandia Secure, Scalable Microgrid Advanced Controls Research Accomplishments On March 3, 2015, in Capabilities, Distribution Grid Integration,...

  5. National Grid (Gas)- Commercial Energy Efficiency Programs

    Broader source: Energy.gov [DOE]

    National Grid’s Commercial Energy Efficiency Program provides support services and incentives to commercial customers who install energy efficient natural gas related measures. Prescriptive...

  6. Sandia National Laboratories: Distribution Grid Integration

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

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

  7. Smart Grid | 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:Energy: Grid Integration Redefining What'sis Taking Over Our Instagram Secretary Moniz9MorganYou are here HomeSmart Grid Smart Grid Smart

  8. Trinity College, The university of Dublin Mature Student

    E-Print Network [OSTI]

    O'Mahony, Donal E.

    Trinity College, The university of Dublin Mature Student GUIDE www.tcd.ie #12;#12;Peer Support Email: disab@tcd.ie Trinity Access Programme: Foundation Course for Higher Education Mature Students Web: www.tcd.ie/Trinity_Access/courses/mature_students.php Email: iboydell@tcd.ie Phone: (01) 896 2754

  9. Introduction to FireGrid 

    E-Print Network [OSTI]

    Welch, Stephen; Usmani, Asif; Upadhyay, Rochan; Berry, Dave; Potter, Stephen; Torero, Jose L

    2007-11-14T23:59:59.000Z

    FireGrid is an ambitious and innovative project, seeking to develop the technology to support a new way of managing emergency response in the modern built environment. Specific novel aspects include the integration of ...

  10. Grid Pricing of Fed Cattle

    E-Print Network [OSTI]

    Schroeder, Ted C.; Hogan, Robert J.; Anderson, David P.

    2009-03-02T23:59:59.000Z

    There are several value-based fed cattle pricing systems, including formula pricing, price grids and alliances. This publication describes the different cattle pricing methods and helps you decide which is best for you....

  11. Sandia National Laboratories: Grid Integration

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

    grid relies on power transmission from the production source-be it a coal-fired plant, solar array, or wind farm-to the consumer. Long-distance transmission results in sizeable...

  12. Software-Based Challenges of Developing the Future Distribution Grid

    SciTech Connect (OSTI)

    Stewart, Emma; Kiliccote, Sila; McParland, Charles

    2014-06-01T23:59:59.000Z

    The software that the utility industry currently uses may be insufficient to analyze the distribution grid as it rapidly modernizes to include active resources such as distributed generation, switch and voltage control, automation, and increasingly complex loads. Although planners and operators have traditionally viewed the distribution grid as a passive load, utilities and consultants increasingly need enhanced analysis that incorporates active distribution grid loads in order to ensure grid reliability. Numerous commercial and open-source tools are available for analyzing distribution grid systems. These tools vary in complexity from providing basic load-flow and capacity analysis under steady-state conditions to time-series analysis and even geographical representations of dynamic and transient events. The need for each type of analysis is not well understood in the industry, nor are the reasons that distribution analysis requires different techniques and tools both from those now available and from those used for transmission analysis. In addition, there is limited understanding of basic capability of the tools and how they should be practically applied to the evolving distribution system. The study reviews the features and state of the art capability of current tools, including usability and visualization, basic analysis functionality, advanced analysis including inverters, and renewable generation and load modeling. We also discuss the need for each type of distribution grid system analysis. In addition to reviewing basic functionality current models, we discuss dynamics and transient simulation in detail and draw conclusions about existing software?s ability to address the needs of the future distribution grid as well as the barriers to modernization of the distribution grid that are posed by the current state of software and model development. Among our conclusions are that accuracy, data transfer, and data processing abilities are key to future distribution grid modeling, and measured data sources are a key missing element . Modeling tools need to be calibrated based on measured grid data to validate their output in varied conditions such as high renewables penetration and rapidly changing topology. In addition, establishing a standardized data modeling format would enable users to transfer data among tools to take advantage of different analysis features. ?

  13. Reinventing Batteries for Grid Storage

    ScienceCinema (OSTI)

    Banerjee, Sanjoy

    2013-05-29T23:59:59.000Z

    The City University of New York's Energy Institute, with the help of ARPA-E funding, is creating safe, low cost, rechargeable, long lifecycle batteries that could be used as modular distributed storage for the electrical grid. The batteries could be used at the building level or the utility level to offer benefits such as capture of renewable energy, peak shaving and microgridding, for a safer, cheaper, and more secure electrical grid.

  14. Smart Wire Grid: Resisting Expectations

    ScienceCinema (OSTI)

    Ramsay, Stewart; Lowe, DeJim

    2014-04-09T23:59:59.000Z

    Smart Wire Grid's DSR technology (Discrete Series Reactor) can be quickly deployed on electrical transmission lines to create intelligent mesh networks capable of quickly rerouting electricity to get power where and when it's needed the most. With their recent ARPA-E funding, Smart Wire Grid has been able to move from prototype and field testing to building out a US manufacturing operation in just under a year.

  15. Smart Wire Grid: Resisting Expectations

    SciTech Connect (OSTI)

    Ramsay, Stewart; Lowe, DeJim

    2014-03-03T23:59:59.000Z

    Smart Wire Grid's DSR technology (Discrete Series Reactor) can be quickly deployed on electrical transmission lines to create intelligent mesh networks capable of quickly rerouting electricity to get power where and when it's needed the most. With their recent ARPA-E funding, Smart Wire Grid has been able to move from prototype and field testing to building out a US manufacturing operation in just under a year.

  16. Reinventing Batteries for Grid Storage

    SciTech Connect (OSTI)

    Banerjee, Sanjoy

    2012-01-01T23:59:59.000Z

    The City University of New York's Energy Institute, with the help of ARPA-E funding, is creating safe, low cost, rechargeable, long lifecycle batteries that could be used as modular distributed storage for the electrical grid. The batteries could be used at the building level or the utility level to offer benefits such as capture of renewable energy, peak shaving and microgridding, for a safer, cheaper, and more secure electrical grid.

  17. NREL: Transmission Grid Integration - Forecasting

    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 Renewable Energy: Grid IntegrationReport AvailableForecasting NREL researchers use

  18. NREL: Transmission Grid Integration - 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:Energy: Grid Integration Redefining What's Possible for Renewable Energy: Grid IntegrationReport AvailableForecastingNews The following news

  19. NREL: Transmission Grid Integration - Projects

    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 Renewable Energy: Grid IntegrationReport AvailableForecastingNews The

  20. NREL: Transmission Grid Integration - 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:Energy: Grid Integration Redefining What's Possible for Renewable Energy: Grid IntegrationReport AvailableForecastingNews ThePublications

  1. NREL: Transmission Grid Integration - Webinars

    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 Renewable Energy: Grid IntegrationReportTransmission Planning and Analysis

  2. NREL: Transmission Grid Integration - Webmaster

    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 Renewable Energy: Grid IntegrationReportTransmission Planning and AnalysisWebmaster

  3. NWTC Controllable Grid Interface (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2012-02-01T23:59:59.000Z

    NREL's Controllable Grid Interface tests wind turbines off-line from the grid, verifies compliance with standards, and provides grid operators with the performance information they need for a faction of the time and cost it would take to test the turbine in the field. To understand the behavior of wind turbines during grid disturbances, manufacturers and utility grid operators need to perform a series of tests and accurate transient simulation studies. The latest edition of the IEC 61400-21 standard describes methods for such tests that include low voltage ride-through (LVRT), active power set-point control, ramp rate limitations, and reactive power capability tests. The IEC methods are being widely adopted on both national and international levels by wind turbine manufacturers, certification authorities, and utilities. Utility operators also need to estimate how much power wind turbines might be able provide to help regulate grid frequency during situations when they need additional energy quickly, and after design modifications or changes are made to control software, manufacturers may be required to retest their turbines. But testing wind turbines in the field can be a lengthy and expensive process often requiring manufacturers and utility operators to send equipment and personnel to remote locations for long periods of time. NREL's National Wind Technology Center (NWTC) has developed a new Controllable Grid Interface (CGI) test system that can significantly reduce the time and cost required to conduct these tests. The CGI is first test facility in the United States that has fault simulation capabilities and allows manufacturers and system operators to conduct the tests required for certification in a controlled laboratory environment. It is the only system in the world that is fully integrated with two dynamometers and has the capacity to extend that integration to turbines in the field and to a matrix of electronic and mechanical storage devices, all of which are located within close proximity on the same site. NREL's 7.5 MVA CGI tests wind turbines off-line from the grid, verifies compliance with standards, and provides grid operators with the performance information they need for a fraction of the time and cost it would take to test the turbine in the field. The system combines hardware and real-time control software and is designed to operate with the NWTC's 2.5-MW dynamometer as well as the center's new 5-MW dynamometer test facilities. It is designed to work with four types of wind turbines, photovoltaic systems, and energy storage inverters. Results from the dynamometer tests can also be used to fine tune and validate the dynamic models used in integration studies and help industry improve turbine performance and develop test standards for renewable technologies and energy storage.

  4. Sandia Energy - Systems Modeling

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

    Simulation Model Energy, Power & Water Simulation Model SunCity Model Water, Energy and Carbon Sequestration Model Gila Basin-Az Water Settlement Model Electrical Grid Storage...

  5. Grid Computing in the Collider Detector at Fermilab (CDF) scientific experiment

    E-Print Network [OSTI]

    Douglas P. Benjamin

    2008-10-20T23:59:59.000Z

    The computing model for the Collider Detector at Fermilab (CDF) scientific experiment has evolved since the beginning of the experiment. Initially CDF computing was comprised of dedicated resources located in computer farms around the world. With the wide spread acceptance of grid computing in High Energy Physics, CDF computing has migrated to using grid computing extensively. CDF uses computing grids around the world. Each computing grid has required different solutions. The use of portals as interfaces to the collaboration computing resources has proven to be an extremely useful technique allowing the CDF physicists transparently migrate from using dedicated computer farm to using computing located in grid farms often away from Fermilab. Grid computing at CDF continues to evolve as the grid standards and practices change.

  6. The pilot way to Grid resources using glideinWMS

    SciTech Connect (OSTI)

    Sfiligoi, Igor; /Fermilab; Bradley, Daniel C.; /Wisconsin U., Madison; Holzman, Burt; Mhashilkar, Parag; /Fermilab; Padhi, Sanjay; Wurthwrin, Frank; /UC, San Diego

    2010-09-01T23:59:59.000Z

    Grid computing has become very popular in big and widespread scientific communities with high computing demands, like high energy physics. Computing resources are being distributed over many independent sites with only a thin layer of Grid middleware shared between them. This deployment model has proven to be very convenient for computing resource providers, but has introduced several problems for the users of the system, the three major being the complexity of job scheduling, the nonuniformity of computer resources, and the lack of good job monitoring. Pilot jobs address all the above problems by creating a virtual private computing pool on top of Grid resources. This paper presents both the general pilot concept, as well as a concrete implementation, called glideinWMS, deployed in the Open Science Grid.

  7. Market-Based Indian Grid Integration Study Options: Preprint

    SciTech Connect (OSTI)

    Stoltenberg, B.; Clark, K.; Negi, S. K.

    2012-03-01T23:59:59.000Z

    The Indian state of Gujarat is forecasting solar and wind generation expansion from 16% to 32% of installed generation capacity by 2015. Some states in India are already experiencing heavy wind power curtailment. Understanding how to integrate variable generation (VG) into the grid is of great interest to local transmission companies and India's Ministry of New and Renewable Energy. This paper describes the nature of a market-based integration study and how this approach, while new to Indian grid operation and planning, is necessary to understand how to operate and expand the grid to best accommodate the expansion of VG. Second, it discusses options in defining a study's scope, such as data granularity, generation modeling, and geographic scope. The paper also explores how Gujarat's method of grid operation and current system reliability will affect how an integration study can be performed.

  8. Benchmarking Grid Information Systems Laurence Field1

    E-Print Network [OSTI]

    Sakellariou, Rizos

    Benchmarking Grid Information Systems Laurence Field1 and Rizos Sakellariou2 1 CERN, Geneva. Grid information systems play a central role in today's pro- duction Grid infrastructures, enabling the discovery of a range of in- formation about the Grid services that exist in an infrastructure. As the number

  9. Grid Architecture Release 2.3

    E-Print Network [OSTI]

    Draft Grid Architecture Release 2.3 November 2014 Draft #12;Grid Architecture Release 2.3 November..................................................................................................... 2.1 3.0 Brief Introduction to Grid Architecture........................................................................................ 3.2 3.1 How Grid Architecture Can Be Used

  10. Evidential Grids Information Management in Dynamic Environments

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    of Compiègne CNRS Heudiasyc UMR 7253, France Email: surname.name@utc.fr Abstract--An occupancy grid map conditions. The perception strategy involves map and scan grids [9], [10]. Indeed, an instantaneous scan grid-detections. The map grid acts as a filter that accumulate information and allows to detect moving objects. In dynamic

  11. Smart Grid - Transforming Power System Operations

    SciTech Connect (OSTI)

    Widergren, Steven E.; Kirkham, Harold

    2010-04-28T23:59:59.000Z

    Abstract—Electric power systems are entering a new realm of operations. Large amounts of variable generation tax our ability to reliably operate the system. Couple this with a greater reliance on the electricity network to serve consumer demand that is likely to rise significantly even as we drive for greater efficiency. Trade-offs between energy and environmental needs will be constantly negotiated, while a reliable supply of electricity needs even greater assurance in a world where threats of disruption have risen. Smart grid capabilities are being proposed to help address the challenges confronting system operations. This paper reviews the impact of smart grid functionality on transforming power system operations. It explores models for distributed energy resources (DER – generation, storage, and load) that are appearing on the system. It reviews the evolving nature of electricity markets to deal with this complexity and a change of emphasis on signals from these markets to affect power system control. Smart grid capabilities will also impact reliable operations, while cyber security issues must be addressed as a culture change that influences all system design, implementation, and maintenance. Lastly, the paper explores significant questions for further research and the need for a simulation environment that supports such investigation and informs deployments to mitigate operational issues as they arise.

  12. Power Grid Defense Against Malicious Cascading Failure

    E-Print Network [OSTI]

    Shakarian, Paulo; Lindelauf, Roy

    2014-01-01T23:59:59.000Z

    An adversary looking to disrupt a power grid may look to target certain substations and sources of power generation to initiate a cascading failure that maximizes the number of customers without electricity. This is particularly an important concern when the enemy has the capability to launch cyber-attacks as practical concerns (i.e. avoiding disruption of service, presence of legacy systems, etc.) may hinder security. Hence, a defender can harden the security posture at certain power stations but may lack the time and resources to do this for the entire power grid. We model a power grid as a graph and introduce the cascading failure game in which both the defender and attacker choose a subset of power stations such as to minimize (maximize) the number of consumers having access to producers of power. We formalize problems for identifying both mixed and deterministic strategies for both players, prove complexity results under a variety of different scenarios, identify tractable cases, and develop algorithms f...

  13. Smart Grid e-Forum | Department of Energy

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

    Federal Smart Grid Task Force Smart Grid e-Forum Smart Grid e-Forum DOE conducted a series of Smart Grid E-Forums to discuss various issues surrounding Smart Grid including...

  14. Topic 3: Smart Grid Communications A.H. MohsenianRad (U of T) 1Networking and Distributed Systems

    E-Print Network [OSTI]

    Mohsenian-Rad, Hamed

    Aggregator PLC IP WMN ZigBee (Home Area Network) Substations Operation Sensors PLC IP/IEC #12;Smart GridTopic 3: Smart Grid Communications A.H. MohsenianRad (U of T) 1Networking and Distributed Systems Reference Model for Smart Grid Dr. Hamed Mohsenian-Rad Texas Tech UniversityCommunications and Control

  15. Smart Grid Information Security (IS) Functional Requirement

    E-Print Network [OSTI]

    Ling, Amy Poh Ai

    2011-01-01T23:59:59.000Z

    It is important to implement safe smart grid environment to enhance people's lives and livelihoods. This paper provides information on smart grid IS functional requirement by illustrating some discussion points to the sixteen identified requirements. This paper introduces the smart grid potential hazards that can be referred as a triggering factor to improve the system and security of the entire grid. The background of smart information infrastructure and the needs for smart grid IS is described with the adoption of hermeneutic circle as methodology. Grid information technology and security-s session discusses that grid provides the chance of a simple and transparent access to different information sources. In addition, the transformation between traditional versus smart grid networking trend and the IS importance on the communication field reflects the criticality of grid IS functional requirement identification is introduces. The smart grid IS functional requirements described in this paper are general and ...

  16. A Core Grid Ontology for the Semantic Grid Wei Xing Marios D. Dikaiakos

    E-Print Network [OSTI]

    Pallis, George

    A Core Grid Ontology for the Semantic Grid Wei Xing Marios D. Dikaiakos Department of Computer, we propose a Core Grid Ontology (CGO) that defines fundamental Grid-specific concepts, and the re- lationships between them. One of the key goals is to make this Core Grid Ontology general enough and easily

  17. What is a Grid? Grid Today, AUGUST 12, 2002: VOL. 1 NO. 9

    E-Print Network [OSTI]

    What is a Grid? Grid Today, AUGUST 12, 2002: VOL. 1 NO. 9 (http://www.gridtoday.com/02/0812/020812.html) I would like to provide perspective on the question of what is a Grid - a perspective derived from several years of building production Grids. For a significant segment of the Grid community, most

  18. Voltage grid support of DFIG wind turbines during grid faults Anca D. Hansen1

    E-Print Network [OSTI]

    Voltage grid support of DFIG wind turbines during grid faults Anca D. Hansen1 , Gabriele Michalke2 Abstract The fault ride-through and grid support capabilities of the doubly fed induction generator (DFIG and their contribution to support the grid, i.e. to the voltage control in the power system, during grid faults

  19. International Journal of Smart Grid and Clean Energy Smart Grid Security: Threats, Vulnerabilities and Solutions

    E-Print Network [OSTI]

    Aloul, Fadi

    to be able to communicate with smart meters via a Home Area Network (HAN) facilitating efficient powerInternational Journal of Smart Grid and Clean Energy Smart Grid Security: Threats, Vulnerabilities is currently evolving into the smart grid. Smart grid integrates the traditional electrical power grid

  20. On the Role of Power-Grid and Communication-System Interdependencies on Cascading Failures

    E-Print Network [OSTI]

    Hayat, Majeed M.

    the fact that today's power grids are reliable and the control and communication systems have been deployed involved in the modeling of interactions between interdependent systems, modeling the coupled powerOn the Role of Power-Grid and Communication- System Interdependencies on Cascading Failures Mahshid

  1. GRID-Launcher v.1.0

    E-Print Network [OSTI]

    N. Deniskina; M. Brescia; S. Cavuoti; G. d'Angelo; O. Laurino; G. Longo

    2008-06-06T23:59:59.000Z

    GRID-launcher-1.0 was built within the VO-Tech framework, as a software interface between the UK-ASTROGRID and a generic GRID infrastructures in order to allow any ASTROGRID user to launch on the GRID computing intensive tasks from the ASTROGRID Workbench or Desktop. Even though of general application, so far the Grid-Launcher has been tested on a few selected softwares (VONeural-MLP, VONeural-SVM, Sextractor and SWARP) and on the SCOPE-GRID.

  2. In Proc. of Intl. Conf. on Discrete Global Grids, Santa Barbara, CA, March 2000. Augmenting SAND with a Spherical Data Model

    E-Print Network [OSTI]

    Samet, Hanan

    is on the issues that arise in adding a spherical data model to a database that has been built on the basis with a spatial and non-spatial database engine. It supports queries on spatial and non-spatial data with a Spherical Data Model (EXTENDED ABSTRACT) Houman Alborzi and Hanan Samet Department of Computer Science

  3. Modelling pre-rRNA 

    E-Print Network [OSTI]

    Axt, Konstantin

    2013-06-29T23:59:59.000Z

    In this project rRNA maturation was investigated with the help of mathematical models of processing pathways from pre-rRNA to mature rRNA species. Previously described models were transferred from Excel to Mathematica. ...

  4. Smart Grid Information Clearinghouse (SGIC)

    SciTech Connect (OSTI)

    Rahman, Saifur

    2014-08-31T23:59:59.000Z

    Since the Energy Independence and Security Act of 2007 was enacted, there has been a large number of websites that discusses smart grid and relevant information, including those from government, academia, industry, private sector and regulatory. These websites collect information independently. Therefore, smart grid information was quite scattered and dispersed. The objective of this work was to develop, populate, manage and maintain the public Smart Grid Information Clearinghouse (SGIC) web portal. The information in the SGIC website is comprehensive that includes smart grid information, research & development, demonstration projects, technical standards, costs & benefit analyses, business cases, legislation, policy & regulation, and other information on lesson learned and best practices. The content in the SGIC website is logically grouped to allow easily browse, search and sort. In addition to providing the browse and search feature, the SGIC web portal also allow users to share their smart grid information with others though our online content submission platform. The Clearinghouse web portal, therefore, serves as the first stop shop for smart grid information that collects smart grid information in a non-bias, non-promotional manner and can provide a missing link from information sources to end users and better serve users’ needs. The web portal is available at www.sgiclearinghouse.org. This report summarizes the work performed during the course of the project (September 2009 – August 2014). Section 2.0 lists SGIC Advisory Committee and User Group members. Section 3.0 discusses SGIC information architecture and web-based database application functionalities. Section 4.0 summarizes SGIC features and functionalities, including its search, browse and sort capabilities, web portal social networking, online content submission platform and security measures implemented. Section 5.0 discusses SGIC web portal contents, including smart grid 101, smart grid projects, deployment experience (i.e., use cases, lessons learned, cost-benefit analyses and business cases), in-depth information (i.e., standards, technology, cyber security, legislation, education and training and demand response), as well as international information. Section 6.0 summarizes SGIC statistics from the launch of the portal on July 07, 2010 to August 31, 2014. Section 7.0 summarizes publicly available information as a result of this work.

  5. Thermal maturity of the Upper Triassic-Middle Jurassic Shemshak Group (Alborz Range, Northern Iran)

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Iran) based on organic petrography, geochemistry and basin modelling: implications for source rock1 Thermal maturity of the Upper Triassic-Middle Jurassic Shemshak Group (Alborz Range, Northern Iran. Organic matter (OM) has been investigated using Rock-Eval pyrolysis, elemental analysis

  6. Sandia Energy - Grid Cyber Vulnerability & Assessments

    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 Scienceand RequirementsCoatingsUltra-High-Voltage SiliconEnergyFailureGlobal Climate ModelsGrid

  7. The Vermont-Sandia Smart Grid Partnership Powering the Future: The Vermont Smart Grid and Beyond

    E-Print Network [OSTI]

    Hayden, Nancy J.

    The Vermont-Sandia Smart Grid Partnership Powering the Future: The Vermont Smart Grid and Beyond BURLINGTON SHERATON HOTEL & CONFERENCE CENTER MAY Laboratories 9:10-10:15 a.m. Opening Plenary: The Vermont-Sandia Smart Grid

  8. Considerations for sensitivity analysis, uncertainty quantification, and data assimilation for grid-to-rod fretting

    SciTech Connect (OSTI)

    Michael Pernice

    2012-10-01T23:59:59.000Z

    Grid-to-rod fretting is the leading cause of fuel failures in pressurized water reactors, and is one of the challenge problems being addressed by the Consortium for Advanced Simulation of Light Water Reactors to guide its efforts to develop a virtual reactor environment. Prior and current efforts in modeling and simulation of grid-to-rod fretting are discussed. Sources of uncertainty in grid-to-rod fretting are also described.

  9. GENI: Grid Hardware and Software

    SciTech Connect (OSTI)

    None

    2012-01-09T23:59:59.000Z

    GENI Project: The 15 projects in ARPA-E’s GENI program, short for “Green Electricity Network Integration,” aim to modernize the way electricity is transmitted in the U.S. through advances in hardware and software for the electric grid. These advances will improve the efficiency and reliability of electricity transmission, increase the amount of renewable energy the grid can utilize, and provide energy suppliers and consumers with greater control over their power flows in order to better manage peak power demand and cost.

  10. Convectively cooled electrical grid structure

    DOE Patents [OSTI]

    Paterson, J.A.; Koehler, G.W.

    1980-11-10T23:59:59.000Z

    Undesirable distortions of electrical grid conductors from thermal cycling are minimized and related problems such as unwanted thermionic emission and structural failure from overheating are avoided by providing for a flow of fluid coolant within each conductor. The conductors are secured at each end to separate flexible support elements which accommodate to individual longitudinal expansion and contraction of each conductor while resisting lateral displacements, the coolant flow preferably being directed into and out of each conductor through passages in the flexible support elements. The grid may have a modular or divided construction which facilitates manufacture and repairs.

  11. Sandia Energy - Transmission Grid Integration

    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 GridDocumentsInstituteThree-DimensionalTransmission Grid

  12. Sandia Energy - Grid Modernization Consortium

    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 Scienceand RequirementsCoatingsUltra-High-Voltage SiliconEnergyFailureGlobal ClimateGridGrid

  13. Aerosol Indirect Effect on the Grid-scale Clouds in the Two-way Coupled WRF-CMAQ: Model Description, Development, Evaluation and Regional Analysis

    SciTech Connect (OSTI)

    Yu, Shaocai; Mathur, Rohit; Pleim, Jonathan; Wong, David; Gilliam, R.; Alapaty, Kiran; Zhao, Chun; Liu, Xiaohong

    2014-10-24T23:59:59.000Z

    This study implemented first, second and glaciations aerosol indirect effects (AIE) on resolved clouds in the two-way coupled WRF-CMAQ modeling system by including parameterizations for both cloud drop and ice number concentrations on the basis of CMAQpredicted aerosol distributions and WRF meteorological conditions. The performance of the newly-developed WRF-CMAQ model, with alternate CAM and RRTMG radiation schemes, was evaluated with the observations from the CERES satellite and surface monitoring networks (AQS, IMPROVE, CASTNet, STN, and PRISM) over the continental U.S. (CONUS) (12-km resolution) and eastern Texas (4-km resolution) during August and September of 2006. The results at the AQS surface sites show that in August, the NMB values for PM2.5 over the eastern/western U.S (EUS/WUS) and western U.S. (WUS) are 5.3% (?0.1%) and 0.4% (-5.2%) for WRF-CMAQ/CAM (WRF-CMAQ/RRTMG), respectively. The evaluation of PM2.5 chemical composition reveals that in August, WRF-CMAQ/CAM (WRF-CMAQ/RRTMG) consistently underestimated the observed SO4 2? by -23.0% (-27.7%), -12.5% (-18.9%) and -7.9% (-14.8%) over the EUS at the CASTNet, IMPROVE and STN sites, respectively. Both models (WRF-CMAQ/CAM, WRF-CMAQ/RRTMG) overestimated the observed mean OC, EC and TC concentrations over the EUS in August at the IMPROVE sites. Both models generally underestimated the cloud field (SWCF) over the CONUS in August due to the fact that the AIE on the subgrid convective clouds was not considered when the model simulations were run at the 12 km resolution. This is in agreement with the fact that both models captured SWCF and LWCF very well for the 4-km simulation over the eastern Texas when all clouds were resolved by the finer domain. Both models generally overestimated the observed precipitation by more than 40% mainly because of significant overestimation in the southern part of the CONUS in August. The simulations of WRF-CMAQ/CAM and WRF-CMAQ/RRTMG show dramatic improvements for SWCF, LWCF, COD, cloud fractions and precipitation over the ocean relative to those of WRF default cases in August. The model performance in September is similar to that in August except for greater overestimation of PM2.5 due to the overestimations of SO4 2-, NH4 +, NO3 -, and TC over the EUS, less underestimation of clouds (SWCF) over the land areas due to about 10% lower SWCF values and less convective clouds in September.

  14. Towering Cumulus Stage Mature Stage Dissipating Stage

    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 ofTopo II:7.1 7.0Coupled Earth

  15. Smart Grid Newsletter ? The Regulators Role in Grid Modernization...

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

    Title: "The Regulator's Role in Grid Modernization" Sponsor: The Modern Grid Strategy is a DOE-funded project conducted by the National Energy Technology Laboratory Leadership from...

  16. DRAFT NISTIR 7628 Revision 1 Guidelines for Smart Grid Cybersecurity

    E-Print Network [OSTI]

    DRAFT NISTIR 7628 Revision 1 Guidelines for Smart Grid Cybersecurity: Vol. 2, Privacy and the Smart Grid The Smart Grid Interoperability Panel ­ Smart Grid Cybersecurity Committee #12;DRAFT NISTIR 7628 Revision 1 Guidelines for Smart Grid Cybersecurity: Vol. 2, Privacy and the Smart Grid The Smart Grid

  17. LANL physicists discuss electrical grid in journal article

    E-Print Network [OSTI]

    - 1 - LANL physicists discuss electrical grid in journal article October 17, 2013 Electrical grids of distribution grids. Revolutionary changes to the electric grid will lead to grids that are more random that could make a major impact on the future grid: · probabilistic measures of electrical grid reliability

  18. Numerical solution of plasma fluid equations using locally refined grids

    SciTech Connect (OSTI)

    Colella, P., LLNL

    1997-01-26T23:59:59.000Z

    This paper describes a numerical method for the solution of plasma fluid equations on block-structured, locally refined grids. The plasma under consideration is typical of those used for the processing of semiconductors. The governing equations consist of a drift-diffusion model of the electrons and an isothermal model of the ions coupled by Poisson's equation. A discretization of the equations is given for a uniform spatial grid, and a time-split integration scheme is developed. The algorithm is then extended to accommodate locally refined grids. This extension involves the advancement of the discrete system on a hierarchy of levels, each of which represents a degree of refinement, together with synchronization steps to ensure consistency across levels. A brief discussion of a software implementation is followed by a presentation of numerical results.

  19. Technology Readiness Assessment (TRA)/Technology Maturation Plan...

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

    is a guide for those involved in conducting TRAs and developing TMPs for DOE-EM. Technology Readiness Assessment (TRA)Technology Maturation Plan (TMP) Process Guide More...

  20. Aramco gears for mature saudi production

    SciTech Connect (OSTI)

    Bleakley, W.B.

    1983-07-01T23:59:59.000Z

    Aramco is encountering the condition of maturing production in some of its prolific fields. A new Exploration and Petroleum Engineering Center and other modern facilities will assist Aramco engineers in solving problems of water production, artificial lift, fluid injection, and others associated with normal reservoir depletion. The Aramco producing operation in Saudi Arabia is in 2 main parts--northern and southern. Reservoirs in the northern part (largely off shore) are generally sandstone, while those to the south are carbonate. The current trend is to produce fields according to reserves, which still gives Ghawar field a huge edge. However, offshore fields are being developed to increase production of medium to heavy crude to replace light from Ghawar to reach the goal of balanced production and reserves. Most of the older fields are under water injection to increase oil recovery. Permeabilities are high, and peripheral patterns are used, with injection wells safely outside the oil-water contacts.

  1. Grid Applications Dr Gabrielle Allen

    E-Print Network [OSTI]

    Allen, Gabrielle

    of chemistry and other codes (www.gridchem.org) ! Petroleum Engineering " UCoMS: Grid-enabling reservoir ! Requires incredible mix of technologies & expertise! ! Many scientific/engineering components " Physics? Finite elements? " Elliptic equations: multigrid, Krylov subspace,... " Mesh refinement ! Many different

  2. ELECTRIC GRID PROTECTION THE INTERNATIONAL

    E-Print Network [OSTI]

    Schrijver, Karel

    interference, Electromagnetic Pulse (EMP), or Intentional Electromagnetic Interference (IEMI). See below the status of national electric grid evaluation and protection against electromagnetic threats in 11 counties sensitivity to the full range of electromagnetic threats1 . This historic and ongoing situation has resulted

  3. Grid Logging: Best Practices Guide

    SciTech Connect (OSTI)

    Tierney, Brian L; Tierney, Brian L; Gunter, Dan

    2008-04-01T23:59:59.000Z

    The purpose of this document is to help developers of Grid middleware and application software generate log files that will be useful to Grid administrators, users, developers and Grid middleware itself. Currently, most of the currently generated log files are only useful to the author of the program. Good logging practices are instrumental to performance analysis, problem diagnosis, and security auditing tasks such as incident tracing and damage assessment. This document does not discuss the issue of a logging API. It is assumed that a standard log API such as syslog (C), log4j (Java), or logger (Python) is being used. Other custom logging API or even printf could be used. The key point is that the logs must contain the required information in the required format. At a high level of abstraction, the best practices for Grid logging are: (1) Consistently structured, typed, log events; (2) A standard high-resolution timestamp; (3) Use of logging levels and categories to separate logs by detail and purpose; (4) Consistent use of global and local identifiers; and (5) Use of some regular, newline-delimited ASCII text format. The rest of this document describes each of these recommendations in detail.

  4. FermiGrid - experience and future plans

    SciTech Connect (OSTI)

    Chadwick, K.; Berman, E.; Canal, P.; Hesselroth, T.; Garzoglio, G.; Levshina, T.; Sergeev, V.; Sfiligoi, I.; Timm, S.; Yocum, D.; /Fermilab

    2007-09-01T23:59:59.000Z

    Fermilab supports a scientific program that includes experiments and scientists located across the globe. In order to better serve this community, Fermilab has placed its production computer resources in a Campus Grid infrastructure called 'FermiGrid'. The FermiGrid infrastructure allows the large experiments at Fermilab to have priority access to their own resources, enables sharing of these resources in an opportunistic fashion, and movement of work (jobs, data) between the Campus Grid and National Grids such as Open Science Grid and the WLCG. FermiGrid resources support multiple Virtual Organizations (VOs), including VOs from the Open Science Grid (OSG), EGEE and the Worldwide LHC Computing Grid Collaboration (WLCG). Fermilab also makes leading contributions to the Open Science Grid in the areas of accounting, batch computing, grid security, job management, resource selection, site infrastructure, storage management, and VO services. Through the FermiGrid interfaces, authenticated and authorized VOs and individuals may access our core grid services, the 10,000+ Fermilab resident CPUs, near-petabyte (including CMS) online disk pools and the multi-petabyte Fermilab Mass Storage System. These core grid services include a site wide Globus gatekeeper, VO management services for several VOs, Fermilab site authorization services, grid user mapping services, as well as job accounting and monitoring, resource selection and data movement services. Access to these services is via standard and well-supported grid interfaces. We will report on the user experience of using the FermiGrid campus infrastructure interfaced to a national cyberinfrastructure--the successes and the problems.

  5. EV-Smart Grid Research & Interoperability Activities 2014 DOE...

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

    - Codes & Standards Support, Grid Connectivity R&D, International Cooperation and EV-Smart Grid Interoperability Center (funding began in FY 2013) Grid Integration * PEV J1772...

  6. Product Quality Assurance for Off-Grid Lighting in Africa

    E-Print Network [OSTI]

    Mills, Evan; World Bank

    2008-01-01T23:59:59.000Z

    services in many off-grid applications, come with first costassurance for off- grid applications in developing countriesand design for off-grid applications. • Train laboratory

  7. alloy battery grid: Topics by E-print Network

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

    power supply challenges Adverse trends associated with the grid- Costs, reliability, peak loads, asset underutilization, TLRs, grid divorce The benefits of a modernized grid...

  8. Computational Needs for the Next Generation Electric Grid Proceedings

    E-Print Network [OSTI]

    Birman, Kenneth

    2012-01-01T23:59:59.000Z

    data  integration  for  Smart  Grid”,  B 2010  3rd  IEEE simulation  integration,  the  next generation smart grid the Smart Grid vision requires the efficient integration of 

  9. Enhancing the Smart Grid: Integrating Clean Distributed and Renewable...

    Energy Savers [EERE]

    Enhancing the Smart Grid: Integrating Clean Distributed and Renewable Generation Enhancing the Smart Grid: Integrating Clean Distributed and Renewable Generation Imagine a grid...

  10. Okaloosa Gas District Smart Grid RFI: Addressing Policy and Logistical...

    Energy Savers [EERE]

    Okaloosa Gas District Smart Grid RFI: Addressing Policy and Logistical Challenges to Smart Grid Implementation Okaloosa Gas District Smart Grid RFI: Addressing Policy and...

  11. OPNET/Simulink Based Testbed for Disturbance Detection in the Smart Grid

    SciTech Connect (OSTI)

    Sadi, Mohammad A. H. [University of Memphis; Dasgupta, Dipankar [ORNL; Ali, Mohammad Hassan [University of Memphis; Abercrombie, Robert K [ORNL

    2015-01-01T23:59:59.000Z

    The important backbone of the smart grid is the cyber/information infrastructure, which is primarily used to communicate with different grid components. A smart grid is a complex cyber physical system containing a numerous and variety number of sources, devices, controllers and loads. Therefore, the smart grid is vulnerable to grid related disturbances. For such dynamic system, disturbance and intrusion detection is a paramount issue. This paper presents a Simulink and Opnet based co-simulated platform to carry out a cyber-intrusion in cyber network for modern power systems and the smart grid. The IEEE 30 bus power system model is used to demonstrate the effectiveness of the simulated testbed. The experiments were performed by disturbing the circuit breakers reclosing time through a cyber-attack. Different disturbance situations in the considered test system are considered and the results indicate the effectiveness of the proposed co-simulated scheme.

  12. Articles about Grid Integration and Transmission | Department...

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

    grid integration and transmission featured by the U.S. Department of Energy (DOE) Wind Program. May 18, 2015 New Report Says Western Grid Can Weather Disturbances with High Wind,...

  13. Structural Vulnerability Assessment of Electric Power Grids

    E-Print Network [OSTI]

    Koç, Yakup; Kooij, Robert E; Brazier, Frances M T

    2013-01-01T23:59:59.000Z

    Cascading failures are the typical reasons of black- outs in power grids. The grid topology plays an important role in determining the dynamics of cascading failures in power grids. Measures for vulnerability analysis are crucial to assure a higher level of robustness of power grids. Metrics from Complex Networks are widely used to investigate the grid vulnerability. Yet, these purely topological metrics fail to capture the real behaviour of power grids. This paper proposes a metric, the effective graph resistance, as a vulnerability measure to de- termine the critical components in a power grid. Differently than the existing purely topological measures, the effective graph resistance accounts for the electrical properties of power grids such as power flow allocation according to Kirchoff laws. To demonstrate the applicability of the effective graph resistance, a quantitative vulnerability assessment of the IEEE 118 buses power system is performed. The simulation results verify the effectiveness of the effect...

  14. Cybersecurity and the Smarter Grid (2014)

    Broader source: Energy.gov [DOE]

    An article by OE’s Carol Hawk and Akhlesh Kaushiva in The Electricity Journal discusses cybersecurity for the power grid and how DOE and the energy sector are partnering to keep the smart grid reliable and secure.

  15. Principal Characteristics of a Modern Grid

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

    Self heals - acts as the grid's "immune system" Supports grid reliability, security, and power quality The blackout of August 2003 took hours to build up. Once it breached the...

  16. Assistant Secretary Hoffman Discusses Grid Modernization with...

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

    Assistant Secretary Hoffman Discusses Grid Modernization with the New York Times and E&E TV Assistant Secretary Hoffman Discusses Grid Modernization with the New York Times and E&E...

  17. Vids4Grids- Controls, Connectors & Surge Protectors

    Broader source: Energy.gov [DOE]

    Modernizing our grid means exciting new devices in the power sector. Find out how new lighting controls, connectors and surge protection will bring out electric grid to the next level.

  18. Past and future of grid shell structures

    E-Print Network [OSTI]

    Paoli, Céline (Céline Aude)

    2007-01-01T23:59:59.000Z

    Because of their original organic shape and the column free space that they provide, the design of grid shell structures challenges architects and structural engineers in more than one way. Very few grid shell building ...

  19. Software Based Barriers To Integration Of Renewables To The Future Distribution Grid

    SciTech Connect (OSTI)

    Stewart, Emma; Kiliccote, Sila

    2014-06-01T23:59:59.000Z

    The future distribution grid has complex analysis needs, which may not be met with the existing processes and tools. In addition there is a growing number of measured and grid model data sources becoming available. For these sources to be useful they must be accurate, and interpreted correctly. Data accuracy is a key barrier to the growth of the future distribution grid. A key goal for California, and the United States, is increasing the renewable penetration on the distribution grid. To increase this penetration measured and modeled representations of generation must be accurate and validated, giving distribution planners and operators confidence in their performance. This study will review the current state of these software and modeling barriers and opportunities for the future distribution grid.

  20. Embodied Energy and Off-Grid Lighting

    E-Print Network [OSTI]

    Alstone, Peter

    2012-01-01T23:59:59.000Z

    as a point of comparison with LED lighting product embodieda fairer comparison between off- grid LED lighting and other

  1. Articles about Grid Integration and Transmission

    Broader source: Energy.gov [DOE]

    Stories about grid integration and transmission featured by the U.S. Department of Energy (DOE) Wind Program.

  2. Flexible Transmission in the Smart Grid

    E-Print Network [OSTI]

    Hedman, Kory Walter

    2010-01-01T23:59:59.000Z

    Planning . 102 vi Transmission Line Maintenance Scheduling 103 Just-in-time Transmission 103 Flexible Transmission in the Smart Grid

  3. 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...

  4. Advanced Demand Side Management for the Future Smart Grid Using Mechanism Design

    E-Print Network [OSTI]

    Wong, Vincent

    meter. All smart meters are connected to not only the power grid but also a communication infrastructure. This allows two-way communication among smart meters and the utility company. We analytically model each user1 Advanced Demand Side Management for the Future Smart Grid Using Mechanism Design Pedram Samadi

  5. Index Terms --Smart grid; power engineering education; power engineering curriculum; power engineering re-

    E-Print Network [OSTI]

    OF THE INTERNET Modern society is migrating to an Internet based business and societal model. As an example: expansion of the grid infrastructure to accommodate renewable resources and microgrids; penetration and operating efficiently. These seven elements may be viewed more generically as making the grid: · Efficient

  6. Where is the ideal location for a US East Coast offshore grid? Michael J. Dvorak,1

    E-Print Network [OSTI]

    weather model data from 2006­2010 were used to approximate wind farm output. The offshore grid was located%, and the combined capacity factor was 48% (gross). By interconnecting offshore wind energy farms 450 km apart of no and full-power events. Offshore grids to connect offshore wind energy (OWE) farms have been proposed

  7. Validating and scaling the microgrid: A scientific instrument for grid dynamics

    E-Print Network [OSTI]

    Xin Liu; Huaxia Xia; Andrew A. Chien

    depends on coordinated and accurate modeling of all four of these elements simultaneously. We have designed and implemented a tool called the MicroGrid which enables accurate and comprehensive study of the dynamic interaction of applications, middleware, resource, and networks. The MicroGrid creates a

  8. An Optimal Approximate Dynamic Programming Algorithm for the Energy Dispatch Problem with Grid-

    E-Print Network [OSTI]

    Powell, Warren B.

    dispatch and energy allocation decisions in the presence of grid-level storage. The model makes it possible the economic behavior of energy allocation and electric power dispatch. Linear pro- gramming has been usedAn Optimal Approximate Dynamic Programming Algorithm for the Energy Dispatch Problem with Grid

  9. Power Grid Correction Using Sensitivity Analysis Under an Pamela Al Haddad

    E-Print Network [OSTI]

    Najm, Farid N.

    by the underlying circuit. A linear program (LP) is then formulated using these constraints, to check if the voltagePower Grid Correction Using Sensitivity Analysis Under an RC Model Pamela Al Haddad Department it as a function of the metal widths on the grid. A non-linear optimization problem is then formulated

  10. A Unified Relational Approach to Grid Information Services Peter A. Dinda Beth Plale

    E-Print Network [OSTI]

    Plale, Beth

    that map them to the Grid make the most de- mands of the GIS. Consider mapping a data-parallel ap--We propose an approach to Grid information services (GIS) that is based on the relational data model involve constraints on compositions of information, queries that map naturally into joins within the re

  11. Criticality of the European Electricity Grid Network

    E-Print Network [OSTI]

    Arrowsmith, David

    1 Criticality of the European Electricity Grid Network MANMADE EU NEST FUNDING D.K. Arrowsmith (catastrophic failure of network components), functional (electricity grid blackouts, supply chain), volatility the qualitative characteristics of power disruptions from a large synchronously-connected electricity grid

  12. Cyber Security in Smart Grid Substations

    E-Print Network [OSTI]

    Utrecht, Universiteit

    Cyber Security in Smart Grid Substations Thijs Baars Lucas van den Bemd Michail Theuns Robin van.089 3508 TB Utrecht The Netherlands #12;CYBER SECURITY IN SMART GRID SUBSTATIONS Thijs Baars T.Brinkkemper@uu.nl Abstract. This report describes the state of smart grid security in Europe, specifically the Netherlands

  13. Power Grid Vulnerability to Geographically Correlated Failures

    E-Print Network [OSTI]

    Shepard, Kenneth

    Power Grid Vulnerability to Geographically Correlated Failures ­ Analysis and Control Implications such as telecommunications networks [14]. The power grid is vulnerable to natural disasters, such as earthquakes, hurricanes [17], [34]. Thus, we focus on the vulnerability of the power grid to an outage of several lines

  14. "Reliability, Resiliency, and Restoration for Smarter Grid

    E-Print Network [OSTI]

    Ohta, Shigemi

    "Reliability, Resiliency, and Restoration for Smarter Grid Workshop" Save the Date April 3 and 4 at mohlsen@bnl.gov "The Resilient Smart Grid" to be held at Brookhaven National Laboratory Upton, Long Island://www.bnl.gov/maps/. This is the 5th workshop that BNL is hosting on the Smart Grid. This Workshop will build on the previous

  15. Grid adaptation for multiscale plasma simulations

    E-Print Network [OSTI]

    Ito, Atsushi

    Grid adaptation for multiscale plasma simulations Gian Luca Delzanno Los Alamos National Laboratory In collaboration with L. Chacon and J.M. Finn #12;delzanno@lanl.gov Outline · Introduction and motivation · Grid tests · New directions · Conclusions #12;delzanno@lanl.gov Outline · Introduction and motivation · Grid

  16. GRID Technologies => `Education' = `Distance Michalis Xenos

    E-Print Network [OSTI]

    Boyer, Edmond

    GRID Technologies => `Education' = `Distance Education' Michalis Xenos 1,2 , Bill Vassiliadis 1 possibilities that Grid technologies create in education, presents current learning paradigms and makes a prediction about the way in which Grid technologies may affect the future of education. The case

  17. Distributing MCell Simulations on the Grid

    E-Print Network [OSTI]

    Sejnowski, Terrence J.

    Distributing MCell Simulations on the Grid Henri Casanova casanova@cs.ucsd.edu Tom Bartol The Computational Grid [21] is a promising platform for the deployment of large-scale scientific and engineering that structure, PSAs are particularly well suited to the Grid infrastructure and can be deployed on very large

  18. Programming, Composing, Deploying for the Grid

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Programming, Composing, Deploying for the Grid Laurent Baduel, Fran¸coise Baude, Denis Caromel FirstName.LastName@sophia.inria.fr Abstract. Grids raise new challenges in the following way: heterogene objects and components. We especially target Grid computing, but our approach also applies to application

  19. Anisotropic Grid Adaptation for Multiple Aerodynamic Outputs

    E-Print Network [OSTI]

    Peraire, Jaime

    Anisotropic Grid Adaptation for Multiple Aerodynamic Outputs David A. Venditti and David L Anisotropic grid­adaptive strategies are presented for viscous flow simulations in which the accurate estimation and Hessian-based anisotropic grid adaptation. Airfoil test cases are presented to demonstrate

  20. Multiprocessor computer overset grid method and apparatus

    DOE Patents [OSTI]

    Barnette, Daniel W. (Veguita, NM); Ober, Curtis C. (Los Lunas, NM)

    2003-01-01T23:59:59.000Z

    A multiprocessor computer overset grid method and apparatus comprises associating points in each overset grid with processors and using mapped interpolation transformations to communicate intermediate values between processors assigned base and target points of the interpolation transformations. The method allows a multiprocessor computer to operate with effective load balance on overset grid applications.

  1. Algorithms in grid classes Ruth Hoffmann

    E-Print Network [OSTI]

    St Andrews, University of

    signs c1, . . . , cs and row signs, r1, . . . , rt and let = {(k, ) : Mk, = 0}. The map : GridAlgorithms in grid classes Ruth Hoffmann University of St Andrews, School of Computer Science Permutation Patterns 2013 Universit´e Paris Diderot 2nd July 2013 Ruth Hoffmann Algorithms in grid classes 1

  2. Smart Grids: Fact or Fiction? A Discussion of Smart Grids in New Zealand

    E-Print Network [OSTI]

    Hickman, Mark

    May 2013 1 Smart Grids: Fact or Fiction? A Discussion of Smart Grids in New Zealand Dr Allan Miller. Introduction The term `smart grid' is used extensively today, even though there are diverse opinions on what to some extent, and the key questions should not be about what constitutes a `smart grid', but what

  3. EL Program: Smart Grid Program Manager: David Wollman, Smart Grid and Cyber-Physical Systems

    E-Print Network [OSTI]

    EL Program: Smart Grid Program Manager: David Wollman, Smart Grid and Cyber-Physical Systems Program Office, Associate Program Manager: Dean Prochaska, Smart Grid and Cyber- Physical Systems Program [updated August 23, 2013] Summary: This program develops and demonstrates smart grid measurement science

  4. Smart Grids: Sectores y actividades clave | 1 Smart Grids: Sectores y actividades clave

    E-Print Network [OSTI]

    Politècnica de Catalunya, Universitat

    Smart Grids: Sectores y actividades clave | 1 Smart Grids: Sectores y actividades clave INFORME para la Sostenibilidad Energética y Ambiental, FUNSEAM. #12;Smart Grids: Sectores y actividades clave eléctrica y los diferentes sectores que forman la smart grid. 6 Figura 2. Evolución y previsión de

  5. 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

  6. The Adjustable Grid: A Grid-Based Cursor Control Solution using Speech Recognition

    E-Print Network [OSTI]

    Gray, Jeffrey G.

    The Adjustable Grid: A Grid-Based Cursor Control Solution using Speech Recognition Tarif Haque1 of grid-based cursor control systems using speech recognition have been developed. These systems typically overlay a numbered 3x3 grid on the screen and allow the user to recursively drill the cursor down

  7. Information GRID in the Corporate World Information GRID in the Corporate World

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Information GRID in the Corporate World Information GRID in the Corporate World .Bogonikolos Zeus Ontology Grid) project, an EU project funded under the Information Society Technologies programme and EAI Tools is discussed. The COG (Corporate Ontology Grid) project addresses the problem of accessing

  8. GridBank: A Grid Accounting Services Architecture (GASA) for Distributed Systems Sharing and Integration

    E-Print Network [OSTI]

    Buyya, Rajkumar

    GridBank: A Grid Accounting Services Architecture (GASA) for Distributed Systems Sharing Australia Nedlands, Western Australia, 6009 barmouta@csse.uwa.edu.au Rajkumar Buyya Grid Computing and Distributed Systems (GRIDS) Lab Dept. of Computer Science and Software Engineering The University of Melbourne

  9. GRID superscalar and SAGA: forming a high-level and platform-independent Grid

    E-Print Network [OSTI]

    Kielmann, Thilo

    GRID superscalar and SAGA: forming a high-level and platform-independent Grid programming Universiteit, Amsterdam, The Netherlands {merzky|kielmann}@cs.vu.nl Abstract. The Simple API for Grid Applications (SAGA), as currently standardized within GGF, aims to provide a simple yet powerful Grid API; its

  10. A Multi-solver Scheme for Viscous Flows Using Adaptive Cartesian Grids and Meshless Grid

    E-Print Network [OSTI]

    Jameson, Antony

    A Multi-solver Scheme for Viscous Flows Using Adaptive Cartesian Grids and Meshless Grid of an adaptive multi-solver approach for CFD sim- ulation of viscous flows. Curvilinear grids are used near solid bodies to capture boundary layers, and stuctured adaptive Cartesian grids are used away from the body

  11. Semantic-based Grid Resource Discovery and its Integration with the Grid Service Broker

    E-Print Network [OSTI]

    Melbourne, University of

    1 Semantic-based Grid Resource Discovery and its Integration with the Grid Service Broker Thamarai Chromepet, Chennai ­ 600044, India Email : stselvi@annauniv.edu 2 Grid Computing and Distributed Systems :mohanram@cdacb.ernet.in Abstract: This paper addresses the need of semantic component in the grid

  12. Using the GridSim Toolkit for Enabling Grid Computing Education Manzur Murshed

    E-Print Network [OSTI]

    Melbourne, University of

    with (Grid-enabled) resources or their agents using middleware services, map tasks to resources (schedulingUsing the GridSim Toolkit for Enabling Grid Computing Education Manzur Murshed Gippsland School: Grid Simulation; Education; Scheduling; Resource Management. Abstract Numerous research groups

  13. Orientation finding using a grid based visual compass

    E-Print Network [OSTI]

    Visser, Arnoud

    Orientation finding using a grid based visual compass Georgios Methenitis Patrick M. de Kok Sander an extension of the model-based visual compass is presented, which can be updated contin- uously, allowing, a visual compass can be used [1, 4, 5]. Such a method estimates the robot's heading by comparing

  14. FutureGrid User Support Gregory Pike, Andrew Younge,

    E-Print Network [OSTI]

    FutureGrid User Support Gregory Pike, Andrew Younge, Gregor von Laszewski, Fugang Wang, Javier Diaz, Archit Kulshrestha, Geoffrey Fox Indiana University #12;Tiered Support Model Knowledge Base Manuals Documentation Knowledge Base, Manuals, Tutorials, Ticket System, Inca, GNOC status Tier 1: Support through

  15. Grid Technology Overview and Status Geoffrey Fox1,2

    E-Print Network [OSTI]

    Grid Technology Overview and Status Geoffrey Fox1,2 , Alex Ho2 , Marlon Pierce1 1 Community Grids...................................................................................................................... 1 2 What is a Grid? ................................................................................................................ 1 3 Grid Technologies and Capabilities

  16. Statistical analysis of cascading failures in power grids

    SciTech Connect (OSTI)

    Chertkov, Michael [Los Alamos National Laboratory; Pfitzner, Rene [Los Alamos National Laboratory; Turitsyn, Konstantin [Los Alamos National Laboratory

    2010-12-01T23:59:59.000Z

    We introduce a new microscopic model of cascading failures in transmission power grids. This model accounts for automatic response of the grid to load fluctuations that take place on the scale of minutes, when optimum power flow adjustments and load shedding controls are unavailable. We describe extreme events, caused by load fluctuations, which cause cascading failures of loads, generators and lines. Our model is quasi-static in the causal, discrete time and sequential resolution of individual failures. The model, in its simplest realization based on the Directed Current description of the power flow problem, is tested on three standard IEEE systems consisting of 30, 39 and 118 buses. Our statistical analysis suggests a straightforward classification of cascading and islanding phases in terms of the ratios between average number of removed loads, generators and links. The analysis also demonstrates sensitivity to variations in line capacities. Future research challenges in modeling and control of cascading outages over real-world power networks are discussed.

  17. Vehicle to Grid Demonstration Project

    SciTech Connect (OSTI)

    Willett Kempton; Meryl Gardner; Michael Hidrue; Fouad Kamilev; Sachin Kamboj; Jon Lilley; Rodney McGee; George Parsons; Nat Pearre; Keith Trnka

    2010-12-31T23:59:59.000Z

    This report summarizes the activities and accomplishments of a two-year DOE-funded project on Grid-Integrated Vehicles (GIV) with vehicle to grid power (V2G). The project included several research and development components: an analysis of US driving patterns; an analysis of the market for EVs and V2G-capable EVs; development and testing of GIV components (in-car and in-EVSE); interconnect law and policy; and development and filing of patents. In addition, development activities included GIV manufacturing and licensing of technologies developed under this grant. Also, five vehicles were built and deployed, four for the fleet of the State of Delaware, plus one for the University of Delaware fleet.

  18. Eastern Seaboard Electric Grid Fragility Maps Supporting Persistent Availability

    SciTech Connect (OSTI)

    Walker, Kimberly A [ORNL; Weigand, Gilbert G [ORNL; Fernandez, Steven J [ORNL

    2012-11-01T23:59:59.000Z

    Persistently available power transmission can be disrupted by weather causing power outages with economic and social consequences. This research investigated the effects on the national power grid from a specific weather event, Hurricane Irene, that caused approximately 5.7 million customer power outages along the Eastern Seaboard in August of 2011. The objective was to describe the geographic differences in the grid s vulnerability to these events. Individual factors, such as wind speed or precipitation, were correlated with the number of outages to determine the greatest mechanism of power failure in hopes of strengthening the future power grid. The resulting fragility maps not only depicted 18 counties that were less robust than the design-standard robustness model and three counties that were more robust, but also drew new damage contours with correlated wind speeds and county features.

  19. Transdisciplinary electric power grid science

    E-Print Network [OSTI]

    Brummitt, Charles D; Dobson, Ian; Moore, Cristopher; D'Souza, Raissa M

    2013-01-01T23:59:59.000Z

    The 20th-century engineering feat that most improved the quality of human life, the electric power system, now faces discipline-spanning challenges that threaten that distinction. So multilayered and complex that they resemble ecosystems, power grids face risks from their interdependent cyber, physical, social and economic layers. Only with a holistic understanding of the dynamics of electricity infrastructure and human operators, automatic controls, electricity markets, weather, climate and policy can we fortify worldwide access to electricity.

  20. Sandia Energy - Distribution Grid Integration

    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 PossibleRadiation Protection245C Unlimited ReleaseWelcomeLongEnergy StorageB.

  1. Sandia Energy - Transmission Grid Integration

    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 PossibleRadiationImplementing Nonlinear757KelleyEffectsonSandia's Stan AtcittyRenewables

  2. Sandia Energy » Grid Integration

    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 PossibleRadiationImplementingnpitche Home About npitche This authorEnergy &EC,Team

  3. Sandia Energy » SMART Grid

    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 PossibleRadiationImplementingnpitche Home About npitche ThisStrategicThird AnnualSandia

  4. Building the International Lattice Data Grid

    E-Print Network [OSTI]

    G. Beckett; B. Joo; C. M. Maynard; D. Pleiter; O. Tatebe; T. Yoshie

    2009-10-09T23:59:59.000Z

    We present the International Lattice Data Grid (ILDG), a loosely federated grid of grids for sharing data from Lattice Quantum Chromodynamics (LQCD) simulations. The ILDG comprises of metadata, file format and web-service standards, which can be used to wrap regional data-grid interfaces, allowing seamless access to catalogues and data in a diverse set of collaborating regional grids. We discuss the technological underpinnings of the ILDG, primarily the metadata and the middleware, and offer a critique of its various aspects with the hindsight of the design work and the first full year of production.

  5. Spacer grid assembly and locking mechanism

    DOE Patents [OSTI]

    Snyder, Jr., Harold J. (Rancho Santa Fe, CA); Veca, Anthony R. (San Diego, CA); Donck, Harry A. (San Diego, CA)

    1982-01-01T23:59:59.000Z

    A spacer grid assembly is disclosed for retaining a plurality of fuel rods in substantially parallel spaced relation, the spacer grids being formed with rhombic openings defining contact means for engaging from one to four fuel rods arranged in each opening, the spacer grids being of symmetric configuration with their rhombic openings being asymmetrically offset to permit inversion and relative rotation of the similar spacer grids for improved support of the fuel rods. An improved locking mechanism includes tie bars having chordal surfaces to facilitate their installation in slotted circular openings of the spacer grids, the tie rods being rotatable into locking engagement with the slotted openings.

  6. Fact Sheet: Protecting Intelligent Distributed Power Grids Against...

    Office of Environmental Management (EM)

    and hierarchical security layer specific to intelligent grid design Intelligent power grids are interdependent energy management systems- encompassing generation,...

  7. Deploying Systems Interoperability and Customer Choice within Smart Grid

    E-Print Network [OSTI]

    Ghatikar, Girish

    2014-01-01T23:59:59.000Z

    twiki- sggrid/bin/view/SmartGrid/PriorityActionPlanssggrid/bin/view/SmartGrid/TTMeetingOnPriceCommunications The

  8. Integration of Computing and Information on Grids Geoffrey Fox

    E-Print Network [OSTI]

    by Fran Berman, Tony Hey and myself. (http://www.grid2002.org/ ) · Grids support e-Science representing

  9. New Report Characterizes Existing Offshore Wind Grid Interconnection...

    Office of Environmental Management (EM)

    New Report Characterizes Existing Offshore Wind Grid Interconnection Capabilities New Report Characterizes Existing Offshore Wind Grid Interconnection Capabilities September 3,...

  10. North RTL grid scan'' studies

    SciTech Connect (OSTI)

    Emma, P.

    1990-10-17T23:59:59.000Z

    This study was made in response to screen measurements which indicated an emittance growth of nearly a factor of two within the North RTL or linac girder-1. Betatron oscillations are induced at the beginning of the North RTL to search for gross geometric aberrations arising within the RTL or sector-2 of the linac. The oscillations are induced horizontally and vertically with two X or two Y dipole correctors stepped in a nested loop fashion. In both cases the full set of RTL and first girder sector-2 linac beam position monitors (BPMs) are sampled in X and Y for each corrector setting. Horizontal (or vertical) data from pairs of BPMs are then transformed to phase space coordinates by the linear transformation constructed assuming the transport optics between the BPMs is known. A second transformation is then made to normalized phase space coordinates by using Twiss parameters consistent with the assumed transport optics. By careful choice of initial Twiss parameters the initial grid can be made square for convenience in graphical interpretation. A linear grid'' is then fitted to the transformed data points for each pair of BPMs. The area of each grid is calculated and linearity qualitatively evaluated. Furthermore, although not the focus of this study, the beta match at each BPM can be quantified. 6 figs.

  11. The CMS integration grid testbed

    SciTech Connect (OSTI)

    Graham, Gregory E.

    2004-08-26T23:59:59.000Z

    The CMS Integration Grid Testbed (IGT) comprises USCMS Tier-1 and Tier-2 hardware at the following sites: the California Institute of Technology, Fermi National Accelerator Laboratory, the University of California at San Diego, and the University of Florida at Gainesville. The IGT runs jobs using the Globus Toolkit with a DAGMan and Condor-G front end. The virtual organization (VO) is managed using VO management scripts from the European Data Grid (EDG). Gridwide monitoring is accomplished using local tools such as Ganglia interfaced into the Globus Metadata Directory Service (MDS) and the agent based Mona Lisa. Domain specific software is packaged and installed using the Distribution After Release (DAR) tool of CMS, while middleware under the auspices of the Virtual Data Toolkit (VDT) is distributed using Pacman. During a continuous two month span in Fall of 2002, over 1 million official CMS GEANT based Monte Carlo events were generated and returned to CERN for analysis while being demonstrated at SC2002. In this paper, we describe the process that led to one of the world's first continuously available, functioning grids.

  12. Smart Grid Status and Metrics Report Appendices

    SciTech Connect (OSTI)

    Balducci, Patrick J.; Antonopoulos, Chrissi A.; Clements, Samuel L.; Gorrissen, Willy J.; Kirkham, Harold; Ruiz, Kathleen A.; Smith, David L.; Weimar, Mark R.; Gardner, Chris; Varney, Jeff

    2014-07-01T23:59:59.000Z

    A smart grid uses digital power control and communication technology to improve the reliability, security, flexibility, and efficiency of the electric system, from large generation through the delivery systems to electricity consumers and a growing number of distributed generation and storage resources. To convey progress made in achieving the vision of a smart grid, this report uses a set of six characteristics derived from the National Energy Technology Laboratory Modern Grid Strategy. The Smart Grid Status and Metrics Report defines and examines 21 metrics that collectively provide insight into the grid’s capacity to embody these characteristics. This appendix presents papers covering each of the 21 metrics identified in Section 2.1 of the Smart Grid Status and Metrics Report. These metric papers were prepared in advance of the main body of the report and collectively form its informational backbone.

  13. Solving Partial Differential Equations on Overlapping Grids

    SciTech Connect (OSTI)

    Henshaw, W D

    2008-09-22T23:59:59.000Z

    We discuss the solution of partial differential equations (PDEs) on overlapping grids. This is a powerful technique for efficiently solving problems in complex, possibly moving, geometry. An overlapping grid consists of a set of structured grids that overlap and cover the computational domain. By allowing the grids to overlap, grids for complex geometries can be more easily constructed. The overlapping grid approach can also be used to remove coordinate singularities by, for example, covering a sphere with two or more patches. We describe the application of the overlapping grid approach to a variety of different problems. These include the solution of incompressible fluid flows with moving and deforming geometry, the solution of high-speed compressible reactive flow with rigid bodies using adaptive mesh refinement (AMR), and the solution of the time-domain Maxwell's equations of electromagnetism.

  14. High-Performance Computing for Real-Time Grid Analysis and Operation

    SciTech Connect (OSTI)

    Huang, Zhenyu; Chen, Yousu; Chavarría-Miranda, Daniel

    2013-10-31T23:59:59.000Z

    Power grids worldwide are undergoing an unprecedented transition as a result of grid evolution meeting information revolution. The grid evolution is largely driven by the desire for green energy. Emerging grid technologies such as renewable generation, smart loads, plug-in hybrid vehicles, and distributed generation provide opportunities to generate energy from green sources and to manage energy use for better system efficiency. With utility companies actively deploying these technologies, a high level of penetration of these new technologies is expected in the next 5-10 years, bringing in a level of intermittency, uncertainties, and complexity that the grid did not see nor design for. On the other hand, the information infrastructure in the power grid is being revolutionized with large-scale deployment of sensors and meters in both the transmission and distribution networks. The future grid will have two-way flows of both electrons and information. The challenge is how to take advantage of the information revolution: pull the large amount of data in, process it in real time, and put information out to manage grid evolution. Without addressing this challenge, the opportunities in grid evolution will remain unfulfilled. This transition poses grand challenges in grid modeling, simulation, and information presentation. The computational complexity of underlying power grid modeling and simulation will significantly increase in the next decade due to an increased model size and a decreased time window allowed to compute model solutions. High-performance computing is essential to enable this transition. The essential technical barrier is to vastly increase the computational speed so operation response time can be reduced from minutes to seconds and sub-seconds. The speed at which key functions such as state estimation and contingency analysis are conducted (typically every 3-5 minutes) needs to be dramatically increased so that the analysis of contingencies is both comprehensive and real time. An even bigger challenge is how to incorporate dynamic information into real-time grid operation. Today’s online grid operation is based on a static grid model and can only provide a static snapshot of current system operation status, while dynamic analysis is conducted offline because of low computational efficiency. The offline analysis uses a worst-case scenario to determine transmission limits, resulting in under-utilization of grid assets. This conservative approach does not necessarily lead to reliability. Many times, actual power grid scenarios are not studied, and they will push the grid over the edge and resulting in outages and blackouts. This chapter addresses the HPC needs in power grid analysis and operations. Example applications such as state estimation and contingency analysis are given to demonstrate the value of HPC in power grid applications. Future research directions are suggested for high performance computing applications in power grids to improve the transparency, efficiency, and reliability of power grids.

  15. Buildings-to-Grid Technical Opportunities: From the Grid Perspective

    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 DataDepartment of Energy Your Density Isn't Your Destiny: Theof Energy FutureDepartment ofBUILDING-TO-GRID TECHNICAL OPPORTUNITIES From

  16. Smart Grid Week: Working to Modernize the Nation's Electric Grid |

    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.pdfBreakingMayDepartment of Energy Ready,Smart Grid RFI PublicDepartmentDepartment

  17. Smart Grid Primer (Smart Grid Books) | 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:Energy: Grid Integration Redefining What'sis Taking Over Our Instagram Secretary Moniz9MorganYou are here Home »SmallNew

  18. Grid Interaction Tech Team, and International Smart Grid Collaboration |

    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 DataDepartment of Energy Your Density Isn't YourTransport(Fact Sheet), GeothermalGrid Integration and the Carrying Capacity of the

  19. Smart Grid Savings and Grid Integration of Renewables in Idaho

    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,Zaleski - PolicyWork Force withNonprofit---5---12DOESmartthe 1 Smart Grid

  20. Energy System Development inAfrica: The case of grid and off-grid power inKenya

    E-Print Network [OSTI]

    de Weck, Olivier L.

    Energy System Development inAfrica: The case of grid and off-grid power inKenya By Katherine Deaton Development inAfrica: The case of grid and off-grid power inKenya Energy System Development inAfrica: The case of grid and off-grid power in Kenya by Katherine Steel Submitted to the Engineering Systems Division

  1. Mastering Uncertainty and Risk at Multiple Time Scales in the Future Electrical Grid

    SciTech Connect (OSTI)

    Chertkov, Michael [Los Alamos National Laboratory; Bent, Russell W. [Los Alamos National Laboratory; Backhaus, Scott N. [Los Alamos National Laboratory

    2012-07-10T23:59:59.000Z

    Today's electrical grids enjoy a relatively clean separation of spatio-temporal scales yielding a compartmentalization of grid design, optimization, control and risk assessment allowing for the use of conventional mathematical tools within each area. In contrast, the future grid will incorporate time-intermittent renewable generation, operate via faster electrical markets, and tap the latent control capability at finer grid modeling scales; creating a fundamentally new set of couplings across spatiotemporal scales and requiring revolutionary advances in mathematics techniques to bridge these scales. One example is found in decade-scale grid expansion planning in which today's algorithms assume accurate load forecasts and well-controlled generation. Incorporating intermittent renewable generation creates fluctuating network flows at the hourly time scale, inherently linking the ability of a transmission line to deliver electrical power to hourly operational decisions. New operations-based planning algorithms are required, creating new mathematical challenges. Spatio-temporal scales are also crossed when the future grid's minute-scale fluctuations in network flows (due to intermittent generation) create a disordered state upon which second-scale transient grid dynamics propagate effectively invalidating today's on-line dynamic stability analyses. Addressing this challenge requires new on-line algorithms that use large data streams from new grid sensing technologies to physically aggregate across many spatial scales to create responsive, data-driven dynamic models. Here, we sketch the mathematical foundations of these problems and potential solutions.

  2. Networks, smart grids: new model for synchronization

    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 VisitSilverNepheline

  3. From: Numerical Grid Generation in Computational Fluid Dynamics and Related Fields, ed. B. K. Soni, J. F. Thompson, H. Hausser and P. R.

    E-Print Network [OSTI]

    Gable, Carl W.

    From: Numerical Grid Generation in Computational Fluid Dynamics and Related Fields, ed. B. K. Soni. Press, 1996. 3-Dimensional Wells and Tunnels for Finite Element Grids 1 3-Dimensional Wells and Tunnels for Finite Element Grids Terry A. Cherry1 Carl W. Gable1 Harold Trease2 ABSTRACT Modeling fluid, vapor

  4. arXiv:1003.2138v1[cs.IT]10Mar2010 1 Need-based Communication for Smart Grid: When

    E-Print Network [OSTI]

    Qiu, Robert Caiming

    Price? Husheng Li and Robert C. Qiu Abstract-- In smart grid, a home appliance can adjust its power, communications and networking. In a smart grid, power is delivered from power suppliers to home appliances-0901425. Power / Price Price Inquiry Power Source Home Fig. 1: The simplified model of smart grid. slowly

  5. VoxMorph: 3-Scale Freeform Deformation of Large Voxel Grids Noura Faraj, Jean-Marc Thiery and Tamy Boubekeur

    E-Print Network [OSTI]

    Boubekeur, Tamy

    for high resolution voxel grids. Our system exploits cages for high-level deformation control. We tackle embedding the voxel model. This cage acts as the unique deformation control interface and is cla the interactive session, resulting in a high resolution voxel grid containing the deformed model. We tested our

  6. Delay Components of Job Processing in a Grid: Statistical Analysis and K. Christodoulopoulos, V. Gkamas, E. A. Varvarigos

    E-Print Network [OSTI]

    Varvarigo, Emmanouel "Manos"

    Delay Components of Job Processing in a Grid: Statistical Analysis and Modeling K}@ceid.upatras.gr Abstract The existence of good probabilistic models for the job arrival process and the delay components introduced at the different stages of job processing in a Grid environment is important for the improved

  7. Insightful Workflow For Grid Computing

    SciTech Connect (OSTI)

    Dr. Charles Earl

    2008-10-09T23:59:59.000Z

    We developed a workflow adaptation and scheduling system for Grid workflow. The system currently interfaces with and uses the Karajan workflow system. We developed machine learning agents that provide the planner/scheduler with information needed to make decisions about when and how to replan. The Kubrick restructures workflow at runtime, making it unique among workflow scheduling systems. The existing Kubrick system provides a platform on which to integrate additional quality of service constraints and in which to explore the use of an ensemble of scheduling and planning algorithms. This will be the principle thrust of our Phase II work.

  8. Mapping on the HEALPix grid

    E-Print Network [OSTI]

    M. R. Calabretta

    2004-12-23T23:59:59.000Z

    The natural spherical projection associated with the Hierarchical Equal Area and isoLatitude Pixelisation, HEALPix, is described and shown to be one of an infinite class not previously documented in the cartographic literature. Projection equations are derived for the class in general and it is shown that the HEALPix projection suggests a simple method (a) of storing, and (b) visualising data sampled on the grid of the HEALPix pixelisation, and also suggests an extension of the pixelisation that is better suited for these purposes. Potentially useful properties of other members of the class are described. Finally, the formalism is defined for representing any member of the class in the FITS data format.

  9. Grid Integration | 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 1,006 492 742 33Frequently20,000 RussianBy: Thomas P. D'Agostino,Glen WattmanInvestigationsandGrid Integration The

  10. Sandia Energy - Distribution Grid Integration

    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 PossibleRadiation Protection245C Unlimited ReleaseWelcomeLongEnergy StorageB.DETL Permalink

  11. Sandia Energy - Smart Grid Technologies

    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 GridDocumentsInstitute ofSiting and Barrier MitigationSmart

  12. Sandia Energy - Transmission Grid Integration

    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 GridDocumentsInstituteThree-Dimensional

  13. Sandia Energy - Distribution Grid Integration

    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 Scienceand RequirementsCoatings Initiated at PNNL's SequimReactors ToDecisionDistribution Grid

  14. Smart Grid | 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 1,397 125EnergyIdaho | Department of Energy SmallSmart Grid

  15. Early maturation processes in coal. Part 1: Pyrolysis mass balances and structural evolution of coalified wood from the Morwell Brown Coal seam

    E-Print Network [OSTI]

    Salmon, Elodie; Lorant, François; Hatcher, Patrick G; Marquaire, Paul-Marie; 10.1016/j.orggeochem.2009.01.004

    2009-01-01T23:59:59.000Z

    In this work, we develop a theoretical approach to evaluate maturation process of kerogen-like material, involving molecular dynamic reactive modeling with a reactive force field to simulate the thermal stress. The Morwell coal has been selected to study the thermal evolution of terrestrial organic matter. To achieve this, a structural model is first constructed based on models from the literature and analytical characterization of our samples by modern 1-and 2-D NMR, FTIR, and elemental analysis. Then, artificial maturation of the Morwell coal is performed at low conversions in order to obtain, quantitative and qualitative, detailed evidences of structural evolution of the kerogen upon maturation. The observed chemical changes are a defunctionalization of the carboxyl, carbonyl and methoxy functional groups coupling with an increase of cross linking in the residual mature kerogen. Gaseous and liquids hydrocarbons, essentially CH4, C4H8 and C14+ liquid hydrocarbons, are generated in low amount, merely by clea...

  16. ARPA-E: Advancing the Electric Grid

    ScienceCinema (OSTI)

    Lemmon, John; Ruiz, Pablo; Sommerer, Tim; Aziz, Michael

    2014-03-13T23:59:59.000Z

    The electric grid was designed with the assumption that all energy generation sources would be relatively controllable, and grid operators would always be able to predict when and where those sources would be located. With the addition of renewable energy sources like wind and solar, which can be installed faster than traditional generation technologies, this is no longer the case. Furthermore, the fact that renewable energy sources are imperfectly predictable means that the grid has to adapt in real-time to changing patterns of power flow. We need a dynamic grid that is far more flexible. This video highlights three ARPA-E-funded approaches to improving the grid's flexibility: topology control software from Boston University that optimizes power flow, gas tube switches from General Electric that provide efficient power conversion, and flow batteries from Harvard University that offer grid-scale energy storage.

  17. ARPA-E: Advancing the Electric Grid

    SciTech Connect (OSTI)

    Lemmon, John; Ruiz, Pablo; Sommerer, Tim; Aziz, Michael

    2014-02-24T23:59:59.000Z

    The electric grid was designed with the assumption that all energy generation sources would be relatively controllable, and grid operators would always be able to predict when and where those sources would be located. With the addition of renewable energy sources like wind and solar, which can be installed faster than traditional generation technologies, this is no longer the case. Furthermore, the fact that renewable energy sources are imperfectly predictable means that the grid has to adapt in real-time to changing patterns of power flow. We need a dynamic grid that is far more flexible. This video highlights three ARPA-E-funded approaches to improving the grid's flexibility: topology control software from Boston University that optimizes power flow, gas tube switches from General Electric that provide efficient power conversion, and flow batteries from Harvard University that offer grid-scale energy storage.

  18. Thermal maturation and petroleum source rocks in Forest City and Salina basins, mid-continent, U. S. A

    SciTech Connect (OSTI)

    Newell, K.D.; Watney, W.L.; Hatch, J.R.; Xiaozhong, G.

    1986-05-01T23:59:59.000Z

    Shales in the Middle Ordovician Simpson Group are probably the source rocks for a geochemically distinct group of lower pristane and low phytane oils produced along the axis of the Forest City basin, a shallow cratonic Paleozoic basin. These oils, termed Ordovician-type oils, occur in some fields in the southern portion of the adjacent Salina basin. Maturation modeling by time-temperature index (TTI) calculations indicate that maturation of both basins was minimal during the early Paleozoic. The rate of maturation significantly increased during the Pennsylvanian because of rapid regional subsidence in response to the downwarping of the nearby Anadarko basin. When estimated thicknesses of eroded Pennsylvanian, Permian, and Cretaceous strata are considered, both basins remain relatively shallow, with maximum basement burial probably not exceeding 2 km. According to maturation modeling and regional structure mapping, the axes of both basins should contain Simpson rocks in the early stages of oil generation. The probability of finding commercial accumulations of Ordovician-type oil along the northwest-southeast trending axis of the Salina basin will decrease in a northwestward direction because of (1) westward thinning of the Simpson Group, and (2) lesser maturation due to lower geothermal gradients and shallower paleoburial depths. The optimum localities for finding fields of Ordovician-type oil in the southern Salina basin will be in down-plunge closures on anticlines that have drainage areas near the basin axis.

  19. Research on feline in vitro maturation and the cell cycle 

    E-Print Network [OSTI]

    Cox, Ashley Michelle

    2013-02-22T23:59:59.000Z

    The feline meiotic cycle is poorly understood. In order to elucidate the events occurring during meiosis in the cat oocyte, a study of the levels of Maturation Promoting Factor (MPF) and MAP Kinase (MAPK), enzymes thought ...

  20. A reservoir management study of a mature oil field

    E-Print Network [OSTI]

    Peruzzi, Tave

    1995-01-01T23:59:59.000Z

    to other mature oil fields to make sound engineering and business decisions. I interpreted the geological structure and stratigaphy of the salt dome oil field. Structure, isopach and cross-sectional maps were constructed. Depositional environments...