Analysis on the Impact of Locational Marginal Price of Wind-Thermal and Pumped-Storage Complementary Power Generation System

Consider the availability of remaining reservoir resources to pumped-storage reserve ancillary services, and establish a day-ahead market clearing model for the wind-thermal and pumped-storage complementary power generation system. Based on the optimality conditions, the energy service price and reserve ancillary service price are decomposed into shadow price components and water value components. The scarcity of reservoir and installed resources is reflected through the shadow price. The influence of pumped-storage constraints on the water value was analyzed from the perspective of power supply and load. The cross-time relationship between water value and shadow price is derived, and the impact of reservoir capacity on water value and remaining reservoir resource value is analyzed. Taking the modified IEEE-39 system as an example, different cases are designed to analyze the changing characteristics of various resource values in different periods, as well as the impact of scarcity of remaining resources on reserve auxiliary service price. Analyze the impact of pumped-storage installed capacity, reservoir capacity, and wind power penetration rate on clearing electricity price and its main components.