直驱型变速恒频风力发电系统建模及仿真分析

Modeling and Simulation of Direct-driven Variable-speed Constant-frequency Wind Power Generation System

在PSCAD/EMTDC中建立了包含风速、风力机、直驱同步发电机、轴系扭振模块、变流器及其控制部分的并网直驱变速恒频风力发电系统模型,提出了基于最大风能跟踪控制结合变桨距控制的策略,研究了在变风速输入和网侧出现单相短路故障时直驱型变速恒频风力发电系统的动态响应特性,仿真结果表明了并网直驱风力发电系统模型及其控制策略的正确性和可行性。

This paper establishes a grid-connected direct-driven variable-speed constant-frequency wind power generation system model by PSCAD/EMTDC software, which consists of wind speed, wind turbine, direct-drive synchronous generator, multi-mass torsional shaft, converter and its control system. The control strategy based on the maximum wind power tracking combined variable pitch control is proposed. The dynamic response characteristics of the direct-driven wind power system under the variable wind speed and the single-phase ground fault on the grid-side. The simulation result shows that the grid-connected direct-driven variable-speed constant-frequency wind power generation system model and its control strategy are correct and feasible.