双馈风力发电机组低电压穿越试验与分析

在分析双馈风力发电机组主控系统、变流器、变桨机构协同控制的基础上，提出了通过调整叶片的桨距角，减少风能的捕获，防止机组超速的变桨机构控制策略及电网电压恢复后快速、稳定恢复有功功率输出的功率给定策略。110 kW小功率试验台模拟试验及2MW双馈风电机组低电压穿越测试说明，控制策略能够满足不同风况下，双馈风电机组低电压穿越过程中转速及功率恢复的控制。

Test and Analysis on Low Voltage Ride Through Control for Doubly-Fed Wind Turbine

On the basis of analyzing the cooperative control of the main control system,the converter and the pitch system for doubly-fed wind turbine units,this paper proposed the pitch control strategy of preventing turbine over-speed and the power preset strategy of fast and stable active power output after grid voltage recovery.Through the mini-watt （1 10kW）bench test and 2MW doubly-fed wind turbine onsite operation test,it indicates that this control strategy is capable to meet the control requirement of speed and power recovery for the doubly-fed wind turbine during low voltage ride through（LVRT）under different wind conditions.