摘要
对PWM整流器的模型分析表明 ,常规间接电流控制 (亦称幅相控制 )方式在本质上是静态解耦控制 ,过渡过程中超调电流过大 ,直流电流偏移 ,及动态响应慢是其内在缺点。本文提出了一种动态解耦的串联补偿控制方案 ,适当配置补偿器的极点可达到任意期望速度且无过冲的电流响应。仿真表明 ,新型控制方案无需检测交流输出电流 ,又能达到采用电流反馈的直接电流控制方式所具有的动态性能。
Analysis of the mathematical model of PWM rectifier shows that the conventional indirect current control(or phase amplitude control)is steady decoupling in essence.Significant transitional current overshoot,current dc offset and slow response are its inherent drawbacks.A new cascade dynamic decoupling compensator is presented to overcome the defects mentioned above.Expected current respone speed is obtained and current overshoot is eliminated by assigning proper poles of the compensator.Simulation shows that the new scheme neednt measure the input AC current and its dynamic characteristics are comparable with the direct current control scheme.
出处
《电工技术学报》
EI
CSCD
北大核心
2003年第1期57-63,共7页
Transactions of China Electrotechnical Society
