电压型PWM整流器预测直接功率控制  

Predictive Direct Power Control for Three-phase Voltage Source PWM Rectifiers

作　　者：杨兴武[1] 姜建国[1] 

机构地区：[1]上海交通大学电气工程系,上海市闵行区200240

出　　处：《中国电机工程学报》2011年第3期34-39,共6页Proceedings of the CSEE

基　　金：国家重点基础研究发展计划项目(973计划)(2005CB221505)~~

摘　　要：将预测直接功率控制用于电压型PWM整流器。该方法基于功率预测模型,在固定时间间隔内以满足功率误差最小为原则来选择电压矢量,从而完成直接功率控制的定频控制。借助于空间矢量调制原理实现开关状态的选择,简化了预测直接功率控制的实现过程。为了消除控制延时引起的功率误差,控制系统设计了控制延时补偿方案。2kW样机的实验结果显示,与传统相电压定向控制相比,预测直接功率控制具有更快的功率响应。另外,对控制延时的补偿显著提高了系统的动态性能。Predictive direct power control（P-DPC） applied to voltage source pulse-width-modulation（PWM） rectifier was introduced in this paper.Based on the model of power prediction,voltage vectors were selected according to minimizing power errors in a fixed time interval,which results in a constant switching frequency control for P-DPC.It simplifies the implementation of P-DPC procedure by selecting switching states based on the principle of space vector modulation（SVM）.In order to eliminate power errors caused by control delay,a detailed control delay compensation scheme was designed.Experimental results based on a 2kW prototype were presented,which showing that P-DPC has a faster power response compared to standard voltage-oriented-control（VOC） techniques.Besides,the dynamic performance of the system is also improved significantly by control delay compensation.

关 键 词：PWM整流器 直接功率控制 预测控制 控制延时补偿 空间矢量调制 

分 类 号：TM46[电气工程—电器]