Research On Black Start Of Wind-Storage New Energy Power Generation System

With the rapid development of modern society,the demand for power generation has also been greatly increased,which has continuously promoted the rapid development of power supply interconnection technology and long-distance AC-DC transmission technology.In recent years,with the connection of renewable energy to the grid,wind power has gradually become the green energy that people pay attention to.When the power grid operation fault is not handled properly,once the accident leads to a large area of power outage,then the use of wind energy as the black start power of the restoration of the power grid is of great significance.First of all,this paper introduces the basic situation of Liaoning region and Wuniushi wind farm,and analyzes the general process of black start and the general principles of black start from the phases of power start,network structure reconstruction,load recovery,and then analyzes the safety of black start from the perspective of system resonance,power system overvoltage,large auxiliary engine load start.Secondly,the basic principle of air storage and the structure of fan are introduced.And from the converter and inverter control structure,inverter space vector pulse width control,double closed-loop control respectively,the basic principle of the converter and inverter are described,and the air storage unit is modeled.Finally,the simulation model of the combined black start of the wind storage system is constructed,and the starting mode and starting criteria of the black start of the wind storage system are analyzed.This paper uses PSCAD software to build a simulation model of black start of the wind storage system,and conducts modeling and simulation analysis from the power constraints of the black start power supply,the starting time constraints of the auxiliary engine to be started,the constraints of the energy storage,the constraints of the natural conditions of wind speed,and the criteria of whether the wind storage can realize black start.It is also proposed to check the electrical safety of the scheme of black starting of air storage by overvoltage and auxiliary load starting.This paper proposes that the black start scheme of the air storage system has better effect,which has certain theoretical research significance and practical engineering value.