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.
出处
《南京邮电大学学报（自然科学版）》
北大核心
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
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
instantaneous voltage and current
load current feedback
dual brick inverter
static charac-teristics
transfer function
