Research On Reactive Voltage Characteristics And Control Of Grid Based On Large Scale Wind Power Concentrated Access

In recent years, with the rapid development of wind power technology development and National policy support for new energy resources, in our country, the wind power generation enterprise obtained the development by leaps and bounds.But because China’s wind resources distribution characteristics and current situation of the development of the power grid, wind power development in China revealed a mass concentration of the development features, and large wind farms are in the far away from the center of the load in remote areas, the scale of the wind power need through the ultrahigh pressure, distant distance line to load center. High pressure transmission lines produces a large number of Reactive power, and volatility and uncertainty of wind power made large scale wind farm output and the Send out power has strong volatility and instability, Leading to the network voltage changes greatly with the change of wind power output, Serious impact on the system voltage stability, so the study of reactive voltage characteristics and control strategy when large scale wind power concentrated access has the important practical significance.This paper first analyzed the wind farm reactive voltage control technology, Researched and analyzed the principle and features of various reactive voltage control measures. By establishing the mathematical model of the wind generator, analyzed the present three mainstream wind generator and the wind farms reactive voltage characteristic. In our country at present the typical wind farms for the research of model Researched reactive voltage characteristic of wind farms PPC and reactive power loss characteristics of wind farms groups, based on this, Researched and analyzed the power grid voltage adjustment characteristics when the wind power output wave, and the impact on the systemoltage stability.Through the research of reactive voltage control equipment in the basic principle and its pressure regulating characteristics in wind farms, and put forward the coordinated control strategy of wind farm group and regional network, and comprehensive control strategy.of reactive voltage coordination control and reactive voltage emergency control combination.Finally, this paper in hexi corridor in gansu province for grid simulation calculation analysis, it is proved in this paper grid of reactive voltage comprehensive control strategy is correct and effective.