摘要
建立了中点箝位三电平PWM整流器的数学模型,为提高系统直流环节动态响应,设计了基于PI调节的电流内环和滑模变结构的电压外环的双闭环控制器。仿真结果表明:该PWM整流器可以有效抑制谐波,实现网侧单位功率因数控制,与常规PI控制器相比,滑模控制器的应用使得直流环节的动态性能得到明显改善。
In this paper, the mathematical model of three-level rectifier is constructed, and the sliding-mode control strategy is studied. A double closed-loop control system based on current closed-loop of PI regulator and voltage closed-loop of the sliding-mode control regulator had been designed. The results of the emulation and the experiment were present. The experiment showed that the rectifier could effectively restrain the harmonic pollution and the system presents better dynamic and static characters.
出处
《电源世界》
2012年第4期21-24,共4页
The World of Power Supply
关键词
三电平
PWM整流器
滑模控制
动态响应
Three-level, PWM Rectifier, Sliding-mode control, Dynamic response
