短路故障消除后SPWM逆变器输出过压问题研究  

Research on overvoltage output of SPWM inverter after short-circuit fault disappears in a short time

作　　者：徐应年[1] 熊蕊[1] 张永丽[1] 

机构地区：[1]华中科技大学电气与电子工程学院,湖北武汉430070

出　　处：《武汉大学学报（工学版）》2004年第6期77-80,92,共5页Engineering Journal of Wuhan University

摘　　要：分析了由电压均值外环和电压瞬时值内环构成控制系统的SPWM逆变器在负载短路故障短时间消除后输出过压的原因,提出了一种简单实用的减小这种输出过压的方法,即在满足系统稳定的情况下,通过增大瞬时值内环的增益来减小逆变器正常工作时电压均值外环的调节范围,并以实例和试验结果给予了验证.This paper analyses causes of the overvoltage output of the SPWM inverter, of which the control system contains the average-voltage-value outer feedback and the instantaneous-voltage-value inner feedback when the load short-circuit fault disappears in a short time. To solve this problem the paper also puts forward a simple and practical method by augmenting the gain of the instantaneous-value inner feedback to diminish the regulating scope of the average-value outer feedback on the condition of the system stabilization. The method is verified with examples and through experiments.

关 键 词：逆变器 短路故障 过压 平均值反馈 瞬时值反馈 

分 类 号：TM464[电气工程—电器]