Reactive Power Coordinated Control Strategy Based on PSO for Wind Farms Cluster

In order to realize the benefit maximization of power generation, doubly fed induction generator (DFIG) actually do not participate in reactive power regulation. Meanwhile, the wind power fluctuation leads to a great variety of reactive power shortage of wind farms. Therefore it is hard to satisfy the requirements of reactive compensation by using the reactive compensation device fixed in each wind farm independently. Currently reactive power compensation strategies of wind farms in a wind farms cluster are mainly controlled by every farm independently, and there is a lack of coordinated controlling between them. In view of all these, this thesis presents a reactive power coordinated control strategy which is suitable for multiple wind farms region. To improve voltage quality and realize the economical operation, we establish a multi-objective optimization model according to the operation information of power grid, and take a research on period-decoupled compensation technology as wind power fluctuate strongly. In this model, PSO algorithm is introduced to calculate the minimization problem of the reactive compensation. Finally, the simulation system testing by actual production data, show the control strategy is available and has perfect accuracy.