Reactive Power Control of Wind Farm Adopting Doubly-Fed Induction Generators

By means of detailed analysis on both reactive power limit of doubly-fed induction generator (DFIG) and impact of stator output reactive power on generator loss,two methods to determine reactive power reference value of DFIG set are proposed. On this basis,adopting parallel connection of generator sets a precise wind farm model is constructed and reactive power distribution scheme of this wind farm is given. Simulative analysis on a wind farm with capacity of 6 MW which consists of a commercial 1.5 MW DFIG set and four other DFIG sets is carried out and the simulation results show that the proposed strategies are correct and effective.