Research on Dynamic Reactive Power Coordinated Control Strategy of Doubly-fed Wind Turbine Based on Improved Genetic Algorithm

Exploiting the reactive voltage regulation capability of a doubly-fed induction wind generator (DFIG) and improving the reactive power response speed of wind turbines are important tasks in enhancing a power system’s voltage stability. This approach determines the reactive power distribution scheme of the two based on the regulation capacity of the stator and grid-side converter of a 1.5MW DFIG in the West Mongolia Power Grid. When the system reactive power demand surpasses the DFIG reactive power output limit, an additional active power control based on the reactive power difference is suggested. The improved genetic algorithm (IGA) is adopted to determine the additional controller parameter values. This control reduces the minimum output active power of the unit while ensuring that the reactive power output limit is increased to meet the reactive power demand of the system. Ultimately, the accuracy of the control strategy is validated through experiments.