自激异步发电机电压和频率控制方法的改进

三相自激异步发电机在可再生能源,如风能、水能等方面起到重要作用。但其主要缺点是在不同的负载和速度下,电压和频率不易调节。介绍了一种新的用于三相异步发电机电压和频率控制的方法。该方法采用无直流电容电压调节的恒压恒频脉宽调制器。电容电压随负载和交流侧电压的调节(通过控制调节指数)而改变。此方法减少了一个直流侧辅助开关,降低了成本,同时也减少了流经直流电容器的高频电流分量,延长了使用寿命,最后给出了仿真和实验结果。

The Improved Method for Voltage and Frequency Control of Self-excited Induction Generator

Three-phase self-excited induction generator plays an important role in renewable energy sources such as wind energy and hydraulic energy.Its main disadvantage is poor voltage and frequency regulation under varying load and speed.This article introduces a new and simple method for voltage and frequency control of three-phase induction generators.The method uses a constant voltage constant frequency pulse width modulation converter without regulating the DC capacitor voltage.The capacitor voltage is left changing with the loading conditions,and the AC side voltage is regulated by controlling the modulation index.This eliminates the need for an auxiliary switch in the DC side,reduces the cost and high-frequency current components flowing in the DC capacitor and increasing its lifetime.The simulation and experimental results are given at the end.