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.
出处
《武汉大学学报（工学版）》
CAS
CSCD
北大核心
2004年第6期77-80,92,共5页
Engineering Journal of Wuhan University
关键词
逆变器
短路故障
过压
平均值反馈
瞬时值反馈
inverter
short-circuit fault
overvoltage
average-voltage-value feedback
instantaneous-voltage-value feedback
