风力发电励磁系统研究

Study on Wind Power Excitation System

采用具有优良输入、输出特性的双脉宽调制(PWM)控制的交-直-交变频器作为交流励磁发电机的励磁电源。仿真实验表明:基于动态同步坐标轴系的双通道解耦励磁控制策略能够实现交流励磁发电机有功、无功和转速的独立调节。双PWM变换器具有功率双向流动,输入和输出谐波电流小,动态性能优良,功率因数可调等优点,是交流励磁发电机的理想励磁电源。

This article applied dual pulse width modulation （PWM） with the excellent input and the output feature to control AC-DC-AC inverters as the excitation power supply for AC excited generator. Through the simulation experiment, it was proved that dual-channel excitation controlling strategy based on dynamic synchronous shaft decoupling could implement the independent regulation of the AC excited generator active power, reactive power and rotating speed. The dual PWM converter had many advantages such as bidirectional power flow, low harmonics input and output currents, excellent dynamic response and adjustable power factor, it was the ideal excitation power of AC excited generator.