Research On The Reactive Power And Voltage Control Strategy Of Large-scale Wind Power Into Jiuquan Grid

The base of large-scale wind power in Jiuquan has been the first million kilowatts of wind power bases in China. After large-scale wind power connected to the grid, the randomness and volatility of its voltage proposed new requirements. In this paper, it focus on the research of the reactive voltage control stragety based on the Jiuquan Grid.Firstly, it introduce the characteristics of diferent wind turbine and different reactive power compensation equipment. According to these basic analysis, the Jiuquan Grid is divided into three layers,which are the grid layer,the cluster layer and the wind farm layer, to research the characteristics of voltage.Secondly,based on the operating characteristics of the Jiuquan Grid, this paper put forward the voltage control mode of the large-scale wind power. Then,it proposes the voltage control stragtegy of large-scale wind power based on the mode,and strive to achieve the accurate and efficient goals, which includes the optimal control strategy based on the reactive power optimization algorithm; the regional control strategy based on the sensitivity algorithm; the control strategy based on the local control.Finally, this paper use the data of Jiuquan Grid in 2015 to verify the accuracy and effectiveness of the proposed control strategy.