1.Global Energy Interconnection Group Co., Ltd., Beijing 100031, China;2.Department of Electrical Engineering, Tsinghua University, Beijing 100084, China;3.Laboratory of Low Carbon Energy, Tsinghua University, Beijing 100084, China

Energy storage technology provides an important technical means for the new power system to deal with the problem of insufficient system supply adequacy caused by the randomness and volatility of high proportion of renewable energy generation. However, low-probability long-period meteorological events of low wind-speed and low irradiation bring a high-risk impact on the reliable power supply. Considering the spatial complementary characteristics of the event occurrence law, the overall optimization of the renewable energy base location in the planning stage is one of the important technical means to improve the adequacy of renewable energy generation in the receiving area. Based on the high-resolution long-period historical meteorological analysis data set, focusing on the temporal-spatial distribution characteristics of long-period low-wind-speed steady weather events, the definition index of the long-period low-wind-speed steady weather events is proposed, the steady weather screening is completed, and the temporal distribution characteristics of a single geographical grid point are quantitatively analyzed. On this basis, the calculation results of the electric power meteorological region in China based on the spatial morphological characteristics of the event are proposed, and the influence of long-period low-wind-speed steady weather events on the power supply adequacy and the location and layout of renewable energy is quantitatively evaluated .