Quotation and operation optimization of VPP in medium and long term market

Abstract

Due to energy shortage and environmental pollution, distributed energy resource (DER) has been pouring into the grid, but its output is intermittent and fluctuant, which affects the operation of power grid. “Virtual power plant (VPP)” provides a channel to solve this problem. In this paper, VPP including distributed power supply (photovoltaic, wind power and gas turbine) and energy storage system (energy storage battery) is taken as the research object. Based on the uncertain factors such as season-of-use price, light intensity and wind speed, the VPP bidding strategy and operation scheduling strategy in the medium and long term contract market are studied, and the risk value model is applied to risk management. The example testing results show that, when quoting, the maximum loss caused by electricity price is generally within 5%, which is an acceptable risk; in operation, the gas turbine plays a major role in balancing the output deviation, and the VPP operation scheduling strategy has certain economic benefits.