无刷双馈风力发电机直接转矩控制系统研究

Study on direct torque control of brushless doubly-fed machines used for wind power generation

提出一种基于直接转矩控制的无刷双馈风力发电机的控制方法,建立了包括风力机,机械传动部分和无刷双馈电机的无刷双馈风力发电系统的整体仿真模型。该系统根据风速变化通过直接控制无刷双馈发电机的电磁转矩,以达到风力机运行的最佳叶尖速比,从而实现风力机在低风段的最大风能追踪控制。

A control method based on direct torque control of brushless doubly-fed wind generation system is presented. A model which includes wind turbine, gear-box, and brushless doubly-fed machines for this system is set up. As wind change, by means of controlling the electromagnetic torque of brushless doubly-fed machines, the best tip speed ratio of wind turbine is realized, and eventually the generating operation mode with maximal wind energy capture comes true.