2MW双馈式风电机组最大功率追踪控制研究

Research on Maximum power Tracking Control of 2MW Doubly-Fed Induction Generator

目前,以双馈感应风力发电机(DFIG)为主的风力发电机组在电力系统中所占比例比较大。本文通过对风力机功率特性和双馈式风电机组最大风能追踪的研究,在分析双馈发电机数学模型和有功、无功功率解耦控制的基础上,应用PSCAD/EMTDC对2MW双馈感应风力发电机进行系统建模,建立了基于发电机定子磁链定向矢量控制的双馈风力发电系统最大功率追踪系统模型,通过变桨距控制与控制有功功率来间接控制DFIG的转速获取最佳输出功率,分析仿真结果,验证控制策略的可行性。

The double-fed induction wind generator （DFIG） has paid a large portion of the wind turbine generator in the electrical power system at present. This paper analyzed the power characteristics and the method of maximum wind energy tracking based on the mathematical model of the DFIG and the decoupling control of active and reactive power. Taking the parameters of 2MW DFIG for example, the simulation model is developed using PSCAD/EMTDC based on the stator-flux-oriented vector control method. Using the action of a variable-pitch control and the active power control to control the rotate speed indirectly and to get a maximum power. The results of simulation prove the feasibility presented in this thesis.