摘要
三相脉宽调制(PWM)整流器通常采用直流电压外环、交流电流内环的双闭环结构,两个控制环一般都采用传统的PI调节器,但传统的PI调节器在负载大范围突变的情况下,很难同时兼顾系统的静态特性和动态特性,难以取得很好的控制效果。针对传统PI调节器在控制上的不足,结合传统PI控制和自适应控制的思想,提出一种简单易行的新型控制方法,以改善PWM整流器的动、静态特性。仿真和实验结果表明:采用该控制方法可大幅度改善PWM整流器的动、静态特性,提高系统的抗扰动能力和鲁棒性,且设计简单,易于实现。
The most common control scheme for the three-phase pulse width modulation （PWM） rectifier is the double close loops, with AC side current loop as the inner-loop and the DC side voltage regulated as the outer-loop.Howev- er, when the load changes considerably, the traditional PI-controller can＇t handle well between its static and dynamic characteristics,so the performance is not good enough.In order to improve the static and dynamic characteristics of the traditional proportion-integral （PI） adjuster, a novel and simple method has been proposed through combining the traditional PI-control and the self-adaptive control.Simulation and experimental results show that the proposed method can signifieantly optimize the static and dynamic eharacteristies of the rectifier, improve its robustness and anti-inter- ference quality, and it is easily designed.
出处
《电力电子技术》
CSCD
北大核心
2013年第4期93-95,共3页
Power Electronics
关键词
整流器
自适应
负载突变
单位功率因数
rectifier
self-adaptive
load changing
unity power factor
