Bidding Strategy of Wind Power and Battery Storage in Power Market Considering the Change of Performance

Abstract

With the increasing proportion of installed capacity of renewable energy such as wind power and photovoltaic in power system, the frequency regulation pressure of power system becomes larger. Renewable energy generators should undertake part of the frequency regulation task. Taking advantage of the complementarity between wind power and battery storage and making them participate in the energy-frequency regulation market has become a hot topic. In the existing studies, when solving the robust optimization model, the frequency regulation performance index is regarded as a constant. However, the index will change with the variation of bidding capacity, real-time reserved capacity and battery storage frequency regulation capacity. In this paper, the performance index is modeled and the prediction function of frequency regulation performance index is adopted in the robust optimization model. By establishing a more accurate model and changing the bidding strategy, the wind power and battery storage can obtain more income. And at the same time, the improvement of frequency regulation performance will encourage wind power and battery storage participating more in frequency regulation market. Finally, an example is given to prove that this method can encourage wind power and battery storage participating in frequency regulation market and obtain more profits.