基于新颖磁链观测的三电平PWM整流器的模糊PI控制策略研究  

Novel Flux Observer Based on the Three-level PWM Rectifier Fuzzy PI Control Strategy

作　　者：张传金[1] 王志业[1] 徐俊杰[1] 葛云涛[1] 

机构地区：[1]中国矿业大学信息与电气工程学院

出　　处：《变频器世界》2012年第6期79-82,共4页The World of Inverters

基　　金：中国矿业大学中央高校基本科研业务费专项基金(项目编号2010ZDP1A10)

摘　　要：三电平PWM整流器在高压大功率场合有着广泛的应用,但是由于三电平PWM整流器自身的开关器件的非线性和对电路参数的依赖性,使得传统的PI双闭环控制无法更好的提高其动态性能,因此限制了其在更宽负载范围内的运用。本文在建立二极管钳位式PWM整流器数学模型的基础上,针对目前三相PWM整流器动态性能较差的特点,采用一种新型简化虚拟磁链定向,设计了一种模糊PI控制器。仿真实验表明:该控制方法设计简单,提高了PWM整流器的动态性能,而且较好地实现了电流的解耦控制,且使系统鲁棒性增强。Three-level PWM rectifier in high pressure situations has been widely used high-power, but because of its switching devices and circuit parameters of nonlinear dependence, the traditional double loop PI control can not be better to improve Its dynamic performance, thus limiting their use of a wider load range. This diode plamped in the establishment of mathematical model of PWM rectifier based on three-phase PWM rectifier for the current poor dynamic performance characteristics, using a new simplified virtual flux oriented design of a fuzzy PI controller. Simulation results show that： the control method is simple, improve the dynamic performance of PWM rectifier, and better achieved the current decoupling control, and enhance the system robustness.

关 键 词：三电平 PWM整流器 非线性 模糊PI控制 虚拟磁链 

分 类 号：TM464[电气工程—电器]