Stability Analysis Of Wind Power Grid Connection And Operation Optimization Of Virtual Power Plant

In order to solve the problem of stable grid connection of power supply,especially the stability of wind power Grid-connected stability and short-circuit fault,as well as the optimization dispatching and cost saving of virtual power plants,effectively reduce the risk of grid stability caused by the randomness of wind power,improve the utilization of wind power,effectively reduce the impact of short-circuit fault on the stable operation of power grid,and effectively optimize the dispatcher of virtual power plants,and save operation cost,this paper studies the wind power stable grid-connected mode,short-circuit fault comparison and virtual power plant power dispatching mode.This paper uses MATLAB/Simulink to model power system,construct simulation,analyze the influence of wind power Grid-connected on grid stability,summarize the conditions of wind power grid-connected,provide the basis for wind power stable grid connection,and analyze the stable grid-connected characteristics of other distributed generations according to the law of wind power grid-connected.Then by setting short-circuit fault,the simulation analyzed the load stability of the user side under single-phase short-circuit,two-phase short-circuit and three-phase short-circuit faults,and put forward reasonable suggestions according to the situation.Finally,this simulation will increase the controllable load in the power system through particle swarm optimization,optimize the system by using energy storage system,realize the reasonable distribution of power in virtual power plant,improve the dispatching ability of power system,and further analyze the combined effect of controllable load and energy storage system on the operation cost of the system based on this model.The simulation analysis shows that the combination of stable power supply and wind power can effectively reduce the risk of wind power grid connection.When short-circuit fault occurs,the three-phase short-circuit fault is the most destructive and will directly cut off the terminal circuit.Under the action of controllable load and energy storage system,the virtual power plant can effectively improve the dispatching capacity of the grid and save the operation cost of the system.