摘要
三相电压型PWM整流器的控制已趋于成熟,其中以滞环控制方法最为经典。针对传统滞环控制策略存在的开关频率不固定从而造成谐波畸变较大的问题,分别通过网侧电压叠加、固定开关频率及不对称环宽等3种方法对传统滞环控制策略进行改进,实现滞环宽度按控制规律可变,从而固定开关频率,减小谐波畸变,最后通过仿真和实验验证了改进方法的优越性。
Three-phase voltage source PWM rectifier control has already become mature,among them with hysteresis control method is the most classical.According to unstable switch frequency result in high harmonic distortion which existed in traditional hysteresis control strategy used by three-phase voltage source PWM rectifier,some improved methods of hysteresis control strategy are introduced.Through the net side voltage overlay,fixed switching frequency and asymmetric bandwidth to improve the traditional hysteresis control strategy,can realize the variable hysteresis bandwidth.According to control rules,switching frequency and reduce harmonic distortion can be fixed.The simulation and experimental results verify the advantages of these method.
出处
《电力电子技术》
CSCD
北大核心
2011年第9期114-116,共3页
Power Electronics
基金
国家自然科学基金项目(50977063)
国家863高技术研究发展计划项目(2008AA11A145)
天津市科技支撑重点项目(09ZCKFGX01800)~~
关键词
整流器
滞环控制
变环宽控制
不对称环宽
rectifier
hysteresis control
variable bandwidth control
asymmetric bandwidth
