PWM可逆变流器空间电压矢量控制技术的研究  

STUDY ON A NEW SPACE VOLTAGE VECTOR CONTROL METHOD ABOUT REVERSIBLE PWM CONVERTER

作　　者：张兴[1] 张崇巍[1] 

机构地区：[1]合肥工业大学电气工程学院,安徽合肥230009

出　　处：《中国电机工程学报》2001年第10期102-105,109,共5页Proceedings of the CSEE

摘　　要：为了提高PWM可逆变流器电流跟踪性能 ,提出了以电流偏差微分矢量进行电流跟踪控制的新方案。当电流偏差较大时 ,选择适当的空间电压矢量 ,使其对应的电流偏差微分矢量具有与电流偏差矢量方向相反的最大分量 ,以获得电流的快速响应 ;当电流偏差较小时 ,则选择适当的空间电压矢量 ,使其对应的电流偏差微分矢量具有与电流偏差矢量方向相反的最小分量以抑制电流谐波 ;当电流偏差很小时 ,则不进行空间电压矢量切换 ,以限定开关频率。实验结果表明 :新方案通过简单的空间电压矢量切换 ,在限定开关频率条件下 ,使电流获得快速响应的同时抑制了电流谐波。To enhance the performance of current tracking control to the reversible PWM converter,a new current control method is put forward which realizes current tracking control with the vector of the differential of current error.While the current error is larger,the suitable space voltage vector is selected to obtain fast current response,which corresponding vector of the differential of current error is of the largest partial vector in reverse direction of current error vector.While the current error is lesser,the suitable space voltage vector is selected to restrain the current harmonics,which corresponding vector of the differential of current error is of the least partial vector in reverse direction of current error vector.While the current error is less,the space voltage vector is not switched to limit PWM switching frequency.The experimental results show that with the new scheme,the fast current response is gained and the current harmonic is eliminated in the condition of the limited switching frequency.

关 键 词：可逆变流器 电流跟踪控制 电压矢量控制 PWM 

分 类 号：TM46[电气工程—电器]