Journal
IEEE TRANSACTIONS ON SUSTAINABLE ENERGY
Volume 2, Issue 4, Pages 433-442Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TSTE.2011.2159254
Keywords
Energy management system (EMS); flying-brick method; load forecast errors; uncertainty; wind generation; wind generation forecast errors
Categories
Funding
- U.S. Department of Energy Office of Energy Efficiency and Renewable Energy
- California Energy Commission Public Interest Energy Research Program (through the California Institute for Energy and Environment)
- U.S. Department of Energy [DE-AC05-76RL01830]
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An approach to evaluate the uncertainties of the balancing capacity, ramping capability, and ramp duration requirements is proposed. The approach includes three steps: forecast data acquisition, statistical analysis of retrospective information, and prediction of grid balancing requirements for a specified time horizon and a given confidence level. An assessment of the capacity and ramping requirements is performed using a specially developed probabilistic algorithm based on histogram analysis, capable of incorporating multiple sources of uncertainty-both continuous (wind and load forecast errors) and discrete (forced generator outages and startup failures). A new method called the flying-brick technique is developed to evaluate the look-ahead required generation performance envelope for the worst-case scenario within a user-specified confidence level. A self-validation process is used to validate the accuracy of the confidence intervals. To demonstrate the validity of the developed uncertainty assessment methods and its impact on grid operation, a framework for integrating the proposed methods with an energy management system (EMS) is developed. Demonstration through EMS integration illustrates the applicability of the proposed methodology and the developed tool for actual grid operation and paves the road for integration with EMS systems in control rooms.
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