I. Introduction
Due to the mature application technology, low development cost and short infrastructure construction period, wind energy, photovoltaic and other renewable energy power generation methods have been greatly developed and used in the past few years. By 2019, the world's installed wind power generation capacity is 650GW, and the wind power generation capacity of China accounts for 32% of the world total. In 2020, the capacity output power of wind in China has increased by 72GW [1]. However, as the installed capacity of wind turbines (WT), photovoltaics, etc. continues to increase, the uncertainty of renewable energy power generation [2] makes a challenge to the reliable power supply, and greatly increases the difficulty of power system scheduling and planning.