Research On The Influence Of High-permeability Wind Power Generation On Voltage Stability Of Regional Grid

In recent years,wind energy attracts extensive attention from scholars at home and abroad due to its own cleanliness and unique social and economic benefits.However,the blind large-scale wind power grid connection will seriously damage the stability of the power grid.Therefore,considering the impact of wind power grid connection on grid stability is a necessary condition for large-scale development of wind power.In this paper,based on the existing modeling of doubly-fed wind generators,the equivalent modeling of wind farms is first performed,and then the influence of grid-connected wind power on grid stability is studied.This article mainly deals with the following two parts:(1)Model the doubly-fed wind generator on the DIgSILENT/Power Factory software and complete the simulation platform required for subsequent simulation.(2)Analyze the equivalent modeling method of traditional wind farms.This paper introduces the existing monkey swarm algorithm,analyzes its insufficiency and combines it with the chaos theory of convenience and search performance,and applies the combined chaos monkey algorithm to wind farm equivalent modeling.Taking the difference of the active output before and after the model equivalence as the objective function,the numerical simulation of the wind farm equivalent modeling problem is performed.Simulation results demonstrate the effectiveness of the chaos monkey algorithm in equivalent modeling of wind farms.(3)Based on the IEEE14 node model and 4M2 A model,the three factors of wind farm output characteristics,access location and power factor are simulated and analyzed.The simulation results show that these factors are related to the stability of the regional power grid.Then,the simulation analysis of the wind power permeability is carried out on the IEEE39 node model.The analysis includes the analysis of the stability of the whole regional power grid when the wind power is not connected to the grid,the electrical permeability of the power grid is gradually increased and the wind farm is deformed because of the big disturbance.The simulation results show that there is a close relationship between the permeability of wind power and the stability of the power grid.