三相电压型PWM整流器功率控制方法  

Power control scheme for three-phase voltage-type PWM rectifiers

作　　者：刘秀翀[1] 张化光[1] 褚恩辉[1] 闫士杰[1] 

机构地区：[1]东北大学信息科学与工程学院,辽宁沈阳110004

出　　处：《电机与控制学报》2009年第1期47-51,56,共6页Electric Machines and Control

基　　金：国家"八六三"高技术基金项目(2006AA04Z183)

摘　　要：针对三相电压型PWM整流器,提出了一种改进的功率控制方法。以三相整流器在d-q同步旋转坐标系中的数学模型为基础,建立了系统功率关系模型,并通过对系统功率关系的分析,提出了改进的功率控制方法。分别控制瞬时有功功率跟踪动态参考有功功率和控制瞬时无功功率收敛于零,实现了输出电压稳定和高功率因数的目标。根据整流器交直流两侧功率关系,基于系统稳定性分析,设计负载电流补偿,构造出了动态参考有功功率。理论分析表明改进的功率控制方法能够消除直接功率控制策略中构造参考有功功率方法所引入的稳态误差。仿真结果验证了所提出的方法的有效性和实用性。A modified power control scheme is proposed for three-phase voltage-type PWM rectifiers. Based on the mathematical model of three-phase rectifier in synchronous dq coordinates, the model of the system power relation was constructed in this paper, and in consequence the modified power control scheme was proposed by analyzing the power relation of the system. The proposed scheme controlled the instantaneous active power on the track of the dynamical reference active power and the instantaneous reactive power to zero, so that the intent of steady output voltage and high power factor was realized. At same time concerning with the power relation of AC and DC sides and based on the analysis of system stability, the proposed scheme constructed reference active power by designing the compensation for the load current. The theoretical analysis shows that the proposed scheme avoids the output error which is introduced from constructed reference active power in direct power control strategy. The effectiveness and practicability of the proposed method are verified by simulation results.

关 键 词：整流器 正弦脉宽调制 功率控制 

分 类 号：TM461[电气工程—电器]