双馈风电机组减载运行的协调控制研究

Research on the coordinated control of load shedding operation by the doubly fed wind turbines

为了使收益和风能利用率最大化,双馈风电机组通常运行于最大功率点追踪模式下,但这样对并网系统来说风力发电机组此时无备用调节容量。在分析双馈风电机组有功功率控制方法的基础上,提出一种通过协调控制风力发电机转子转速和桨距角的策略,来实现双馈风电机组的减载运行,从而获得风力发电机组应有的可调容量。最后通过PSCAD软件建立仿真模型,验证该控制策略的正确性和可行性。

In order to maximize profits and wind energy utilization rate, doubly fed wind turbines usually operate in the mode of maximum power point tracking, but in this scenario the wind turbines have no spare capacity to adjust for the grid-connected system. Based on the control method analysis of the active power of the doubly fed wind turbines, this paper proposed a coordinated control strategy of increasing the wind generator＇ s rotor speed and adjusting the pro- peller pitch angle to accomplish load shedding operation of the doubly fed wind turbines and obtain adjustable capacity for the doubly fed wind turbine. Detailed simulation study ~.erified the correctness and feasibility of the proposed con- trol strategy by establishing the simulation model in PSACD.