Wind Storage System Participates In Black Start Storage Capacity Configuration And Grid Reconfiguration

With the continuous development of human society,people’s demand for electricity is growing,which makes the scale of the power system become more and more massive,and large power outages bring more serious and extensive hazards in the future.Therefore,it is important to study the rapid and effective restoration of the power system after a major power outage,and the unit black start and grid reconfiguration as important stages of grid restoration need to be studied in depth.The power system continues to change to a high proportion of new energy systems,wind power and other new energy will occupy the main position in the grid,while the large-scale application of energy storage makes wind power as a black-start power source possible,and energy storage is the key to play its black-start capability,so it is very necessary to study the wind storage system to participate in black-start energy storage configuration and grid reconfiguration.First,the main processes of power system black start: unit black start,grid reconfiguration and load restoration are analyzed and introduced,and the main structure and process of wind storage system participation in black start are analyzed,and finally the main concerns of wind storage system participation in black start are derived.Then,a new method was proposed to optimize the energy storage capacity of wind farm black start.Using wind power output prediction data,combined with black start minimum output and nonparametric kernel density estimation,the executable inclination of black start is defined,and then the time period for wind storage to participate in black start is determined.At the same time,considering the role of energy storage in the black start operation process of wind farms and its role in normal operation,an energy storage operation plan was proposed,with the objective function of maximizing compensation for vacancies.An energy storage configuration optimization model was established to determine the configured energy storage capacity and power.And the proposed strategy and optimization model were analyzed and validated using a 45 MW wind farm in Inner Mongolia,and compared with relevant literature.Finally,research was conducted on the participation of wind storage systems in grid reconstruction.A recovery path determination method considering line reliability and overvoltage was proposed,and a two-layer optimization model was established based on this method.The upper level aims to maximize power generation capacity and determine the order of unit recovery,while the lower level aims to minimize line reliability and overvoltage risk and determine the unit recovery path.And a case study was conducted on the IEEE24 node system to verify the recovery process with and without wind power participation,as well as the situation of partial line damage,indicating that wind power participation can accelerate power system recovery.