DFIG三相四开关网侧变流器预测功率控制策略  

Predictive Power Control Strategy for Three-Phase Four-Switch Grid-Side Converter of the DFIG

作　　者：竺兴妹 刘琳琳 ZHU Xingmei;LIU Linlin(Electronic Engineering Department,Jiangsu Nanjing Engineering Vocational College,Nanjing 211135,Jiangsu,China;School of Information Engineering,Wuhan Huaxia University of Technology,Wuhan 430000,Hubei,China)

机构地区：[1]江苏省南京工程高等职业学校电子工程系,江苏南京211135 [2]武汉华夏理工学院信息工程学院,湖北武汉430000

出　　处：《电网与清洁能源》2022年第3期24-31,41,共9页Power System and Clean Energy

基　　金：湖北省自然科学基金项目(ZRMS2017000444)。

摘　　要：针对双馈感应发电机(DFIG)网侧变流器(GSC)采用三相四开关拓扑时的运行控制问题,设计了一种新型预测功率控制器。新型控制方案中采用了三个电压矢量来确保GSC开关频率保持恒定,同时使GSC有功和无功功率纹波最小化。同时,控制器可计算出补偿功率以消除直流侧中点电位波动,无需使用低通滤波器。利用DFIG测试平台开展了实验,结果表明新型预测控制能有效抑制直流母线电压失衡,并具有快速动态响应特性,且GSC电流总谐波失真较低。For the operation control of the doubly fed induction generator(DFIG)grid-side converter(GSC)which adopts the three-phase four-switch topology,a novel predictive power controller is designed.Three voltage vectors are used in the new control scheme to ensure that the GSC switching frequency remains constant,while minimizing GSC active and reactive power ripples.At the same time,the controller can calculate the compensation power to eliminate the neutral-point potential fluctuations without the low-pass filters.Experiments were carried out using the DGIF test platform,and the results showed that the new predictive control can effectively suppress the DC-link voltage imbalance,has fast dynamic response characteristics,and the total harmonic distortion of the GSC current is low.

关 键 词：双馈感应发电机 网侧变流器 三相四开关 预测功率控制 

分 类 号：TM614[电气工程—电力系统及自动化]