三相PWM整流器间接电流控制动态性能的改进  

Improvement in Dynamic Performance of Indirect Current Control Strategy on Three Phase Voltage Source PWM Rectifier

作　　者：王晓晨[1] 

机构地区：[1]合肥工业大学,安徽合肥230009

出　　处：《电力电子技术》2007年第10期110-112,共3页Power Electronics

摘　　要：三相电压型PWM整流器的间接电流控制I(ndirect Current Control,简称ICC)方案具有稳态性能好,控制简单,成本低的优点,若能克服动态性能差的弱点,仍有很大的使用价值。现从三相电压型PWM整流器在同步旋转坐标系下的数学模型入手,深入分析常规ICC方案,指出其动态性能差的根源在于电流响应性差。由此提出了增加串联补偿校正的改进方案,以改善电流特性。此外,还增加了输出直流电压微分负反馈环节,以抑制电压超调。对控制系统的软硬件进行了设计。实验结果表明,改进后的控制方案,大大提高了动态性能,并兼备ICC和直接电流控制(Direct Current Control,简称DCC)的优点。Three phase voltage source PWM Rectifier＇s indirect current control strategy has good static performance, simple control and low cost.If its weakness of bad dynamic performance is overcome,it is still valued.In this article normal indirect current control is deeply studied beginning with its mathematical model under synchronous rotating coordinate.It is indicated that its bad dynamic performance originates from bad current response.So an improving scheme adding compensation in series is brought out.Additionally a differential negative feedback loop of DC output voltage is added to limit the voltage overshoot.The control system＇s hardware and software are designed and the experiment results prove that improved control scheme makes great process in dynamic performance and has advantages of both indirect and direct current control.

关 键 词：整流器 脉宽调制 控制 补偿 

分 类 号：TM461[电气工程—电器]