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The Electricity Reliability Council of Texas (ERCOT) commissioned this study of the ancillary services requirements for its system to accommodate up to 15,000 MW of wind energy. The Study evaluates and makes recommendations related to the methodology used by ERCOT to determine ancillary service needs; estimates the impacts of wind generation on the costs of ancillary services; and identifies changes to procedures related to severe weather conditions. ERCOT re-evaluated—and largely validated—the results of this study in a 2013 update.
Located in Integration Topics / Grid Integration Studies / Grid Integration Studies folder
This report details case studies of Spain, Germany, Denmark, and several balancing areas in North America and looks at the specific systems operational measures undertaken to integrate variable RE. The case studies examine how systems operators improved their situational awareness, ability to assess real-time reliability and risks, and decision support processes.
Located in Integration Topics / System Operations Improvements / System Operations Improvements folder
Utilities worldwide are concerned about the financial impact of increasing DPV adoption among their retail customers. This report analyzes the impact of DPV deployment on distribution utility revenues and retail electricity tariffs in Thailand. It provides policymakers, utilities, and other energy practitioners a real-world example of how DPV affects certain stakeholders.
Located in Topics & Resources / Regulation & Public Policy / Regulation & Public Policy folder
Utilities worldwide are concerned about the financial impact of increasing distributed PV adoption among their retail customers. This report analyzes the impact of distributed PV deployment on distribution utility revenues and retail electricity tariffs in Thailand. It provides policymakers, utilities, and other energy practitioners a real-world example of how distributed PV affects certain stakeholders.
Located in Integration Topics / Distributed Generation / Distributed Generation folder
These slides describe the Flexibility Assessment Tool (FAST), which can be used to assess the flexibility of a power system. This assessment can help operators address the added variability and uncertainty associated with large-scale variable RE penetration on the grid. The tool specifically enables the examination of flexible generation, interconnection, storage, and demand-side management. Although these slides are intended to describe the FAST tool, they can also be used as a general guide for key steps to assess system flexibility.
Located in Integration Topics / Flexible Generation / Flexible Generation folder
This report discusses the links between weather forecasts and photovoltaic (PV) output, as well as the various methods for conducting forecasting. Also included is an example of “upscaling” in which representative systems are used to develop a forecast for a larger pool of systems. The authors also analyze the accuracy of tools and present a survey of tools used worldwide.
Located in Integration Topics / Forecasting / Forecasting folder
This review examines several wind power forecasting models, including Wind Power Management System, Wind Power Prediction Took, Prediktor, ARMINES, and Previento. These models use physical, statistical, and hybrid methodologies. The authors examine the accuracy of the models and possible causes of error.
Located in Integration Topics / Forecasting / Forecasting folder
This report examines wind forecasting of wind ramp events and possible metrics to evaluate ramps. The authors compare existing methodologies, including event detection and regression, to assess such ramps and find that additional work is needed to develop forecasting methodologies that are more accurate.
Located in Integration Topics / Forecasting / Forecasting folder
This report provides a brief overview of emerging best practices and state-of-the-art methods for variable RE forecasting. The authors differentiate between shortest term (0 – 6 hours), short term (6 – 48 hours) and medium-term (2 – 10 days) applications for solar and wind power forecasting. Topics covered include forecasting techniques (including data requirements, numerical prediction models, conversion of meteorological forecasts to power generation forecasts, ensemble forecasting, forecasting power plant outages and curtailments), forecast accuracy, and various approaches to RE forecasting. Chapter 3 provides examples of how systems around the world are approaching RE forecasting, with examples from Europe, the United States, India, South Africa, Brazil and Uruguay. Additionally, the report discusses general concepts for integrating RE forecasting into system operations.
Located in Integration Topics / Forecasting / Forecasting folder
This report quantifies the value of improved short-term wind power forecasting in the California Independent System Operator market and estimates savings from regulation and flex reserves, as well as production savings. The authors examine both low wind (8% penetration) and high wind (25% penetration) scenarios. Cost savings are estimated to be USD 1.27 to 17.1 million for flex reserves, USD 0.917 to 12.7 million for regulation reserves, and USD 2.87 to 116 million for production costs.
Located in Integration Topics / Forecasting / Forecasting folder
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