PWM 逆变器双环控制技术研究.pdf

文档介绍：PWM 逆变器双环控制技术研究
Research on dual-loop control technology for PWM Inverters
何俊,彭力,康勇
HE Jun,PENG Li,KANG Yong
(华中科技大学电气与电子工程学院,湖北,武汉 430074,pretenderhj@)
(Department of Electrical and Electronics Engineering,
Huazhong University of Science and Technology, Wuhan 430074,China)

摘要:分析比较了单相 PWM 逆变器电感电流内环电压外环和电容电流内环电压外环两种双环
控制方式,重点研究了电容电流内环电压外环双环控制。依据电流内环所采用调节器的不同,分别
讨论了电流内环采用 P 调节器、电压外环为 PI 调节器和电流内环、电压外环均为 PI 调节器两种双
环控制方式。采用极点配置的方法设计控制器参数,仿真和实验结果表明以上两种双环控制方式均
能达到较好的动、静态特性。
Abstract:The voltage and current dual loop control system is divided into inductor
current feedback and capacitor current feedback. Both of them are analysed pared in
the paper. Depending on the difference of controller for the current loop, the dual loop control
is classified into two methods: current loop using P controller with voltage loop using PI
controller and both current loop and voltage loop using PI controller. Controller parameters
are designed based on pole assignment technique. Simulink and experiment results
demonstrated that both of two schemes could achieve good dynamic and static performance.
关键词:PWM 逆变器双环控制极点配置
Key words: PWM inverter, dual-loop control, pole assignment

1 引言于电感电流内环对负载扰动的抑制作用较差,
瞬时控制方案可以在运行过程中实时地尤其是在非线性负载时输出波形很不理想,所
调控输出电压波形,使得供电质量大大提高。以本文采用电容电流内环电压外环控制方案。
文献研究表明电压外环电流内环的双环控制本文中的逆变器双闭环控制结构由外环电压
方案是高性能逆变电源波形控制的发展方向调节器和内环电流调节器组成