Abstract
With the increased promotion of integrated energy power systems (IEPS), renewable energy and energy storage systems (ESS) play a more important role. However, the fluctuation and intermittent nature of wind not only results in substantial reliability and stability defects, but it also weakens the competitiveness of wind generation in the electric power market. Meanwhile, the way to further enhance the system reliability effectively improving market profits of wind farms is one of the most important aspects of Wind-ESS joint operational design. In this paper, a market-oriented optimized dispatching strategy for a wind farm with a multiple stage hybrid ESS is proposed. The first stage ESS is designed to improve the profits of wind generation through day-ahead market operations, the real-time market-based second stage ESS is focused on day-ahead forecasting error elimination and wind power fluctuation smoothing, while the backup stage ESS is associated with them to provide the ancillary service. An interval forecasting method is adopted to help to ensure reliable forecast results of day-ahead wind power, electricity prices and loads. With this hybrid ESS design, supply reliability and market profits are simultaneously achieved for wind farms.
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