Reactive Power Control Strategy of Multi-reactive Power Source Cooperative Wind Farm and Grid

Abstract

In view of the insufficiency of reactive power during the operation of the main grid, a reactive power shortage is issued to the feeder where the wind farm is located, a wind farm reactive power voltage distribution characteristic model is established, which reveals the dynamic voltage distribution characteristics and change rules of the wind farm, and clarifies that the wind turbine has no power. Work limit and main influencing factors. On this basis, a wind farm reactive voltage control strategy based on the dynamic coordination of multiple reactive power sources such as wind farm static reactive power generators, fixed capacitor banks and wind turbines is proposed. According to the different reactive power requirements of the main grid, priority is given to using wind turbines Dynamic reactive power capacity, followed by static reactive power generators, and finally fixed capacitor banks. While meeting the reactive power requirements of the main grid, it improves the wind farm voltage qualification rate and dynamic reactive power margin. The model of wind farm and delivery system is built in PSCAD, and the simulation proves the accuracy of theoretical analysis and the effectiveness of control strategy.