摘要
针对三相高功率因数整流器的控制要求和实际工程条件,进行了基于低开关损耗的三相PWM整流器研究,系统采用了负载电流前馈的电流滞环控制策略。该系统不仅改进了传统滞环控制策略带来的高开关频率的问题,更引入了负载电流前馈控制,使得系统对于外环的PI参数有着较传统滞环PWM整流器更低的依赖性,在三相电网不平衡的条件下也表现更好的运行特性。仿真波形和实验数据都验证了该控制方法的有效性以及对PI调节参数的低依赖性。
According to the control requirement and actual project conditions of three-phase high power factor rectifier, the low switching losses three-phase PWM rectifier which adopts hysteresis current control strategy based on load current feed-forward control was researched. The system not only improve the high-frequency switching problem brought by conventional hysteresis control strategy, but also adopts load current feedforward control to make the system has much lower dependence on the PI parameters of the outer voltage regulator than conventional hysteresis current control PWM rectifiers. The system works well even under unbalance power conditions. Simulation and experimental data both confirm the validity of the new control strategy.
出处
《电气传动》
北大核心
2009年第11期28-32,共5页
Electric Drive
基金
天津市自然科学基金(06YFJMJC01800)
天津市科学技术发展基金(2006BA24)
关键词
负载电流前馈
高功率因数
低开关损耗
PI参数
load current feed-forward control
high power factor
low switching losses
PI parameters
