负载电流前馈双闭环控制逆变器的研究  

Research on Double Closed-loop Controlled Inverter with Load Current Feedback

作　　者：马海啸[1] 龚春英[2] 

机构地区：[1]南京邮电大学自动化学院,江苏南京210046 [2]南京航空航天大学自动化学院,江苏南京210016

出　　处：《南京邮电大学学报（自然科学版）》2012年第3期30-35,共6页Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition

基　　金：国家自然科学基金(51107057);南京邮电大学引进人才基金(NY208047)资助项目

摘　　要：电压环为PI调节器、电流环为滞环控制的瞬时电压电流双闭环控制策略以其易于实现,动态响应速度快等优点,在逆变器中得到了广泛应用。但在大功率的逆变场合,这种双闭环的控制策略无法提高逆变器的外特性。文中基于双降压式逆变器这种拓扑结构,分析了采用双闭环控制策略无法提高逆变器外特性的原因。研究了一种负载电流前馈双闭环控制策略,该控制策略在双闭环控制策略的基础上增加了负载电流补偿,提高了逆变器的外特性。研制了一台单相6kVA双降压式逆变器的原理样机,实验结果验证了理论分析的正确性。Instantaneous voltage and current double closed-loop controlled strategy which has PI voltage regulator and Hysteresis current controller had been widely used in inverters for the reason of the advanta- ges of simple implementation and rapid dynamic response. It is proved that this controlled strategy could not to provide the inverter＇ s static characteristics in high power inverters, and the reason was analyzed in this paper. A Double closed-loop controlled strategy with load current feedback had been researched. Based on double closed-loop controlled strategy, this controlled strategy adds a load current compensation. So the inverter＇ s static characteristics could be provided. A single phase 6kVA high power inverter proto- type was designed. The results of the experiment verified the correctness of the theoretic analysis.

关 键 词：瞬时电压电流 负载电流反馈 双降压式逆变器 外特性 传递函数 

分 类 号：TM464[电气工程—电器]