非理想条件下MMC-SAPF的无源控制策略研究  

Research on Passive Control Strategy of MMC-SAPF Under Non-ideal Conditions

作　　者：程启明 王玉娇 程尹曼[2] 沈磊 魏霖 CHENG Qiming;WANG Yujiao;CHENG Yinman;SHEN Lei;WEI Lin(Shanghai Key Laboratory Power Station Automation Technology Laboratory(College of Automation Engineering,Shanghai University of Electric Power),Yangpu District,Shanghai 200090,China;College of Electronics and Information Engineering,Tongji University,Yangpu District,Shanghai 201804,China)

机构地区：[1]上海市电站自动化技术重点实验室(上海电力大学自动化工程学院),上海市杨浦区200090 [2]同济大学电子与信息工程学院,上海市杨浦区201804

出　　处：《中国电机工程学报》2019年第23期7023-7032,共10页Proceedings of the CSEE

基　　金：国家自然科学基金项目(61573239);上海市电站自动化技术重点实验室资助项目(13DZ2273800)~~

摘　　要：为了提高传统有源电力滤波器耐压水平和等效开关频率,将电平数目较多的模块化多电平变流器(modular multilevel converter,MMC)应用于并联型有源滤波器(shunt active power filter,SAPF)。针对三线制电力系统的非理想运行状态,提出基于正负序分离的无源控制器(passivity-based control,PBC)策略,可根据有源滤波器的容量,灵活的选择补偿信号。首先,根据基于模块化多电平变流器型有源滤波器的数学模型,论证其无源性,采用阻尼注入法设计动态性能较高的正负序无源控制规律;其次,加入适用于电网非理想条件下的准PR环流控制、电容电压控制器,以提高系统性能;最后,在电网平衡、负荷投切、负荷不平衡及电网电压跌落状态下,通过Matlab/Simulink软件仿真和硬件实验,验证提出的无源控制系统用于非理想条件下基于模块化多电平变流器型有源滤波器的有效性和优越性。In order to improve withstand voltage level and equivalent switching frequency,the modular multilevel converter(MMC)with a large number of levels was applied to shunt active power filter(SAPF).In view of the non-ideal operation state of three-wire power system,a passivity-based control(PBC)strategy of MMC-SAPF based on the separation of positive and negative sequence was proposed to selected needed compensating signals flexibly according to the capacity of the active filter.Firstly,based on the mathematical model of MMC-SAPF,demonstrated its passivity and designed the passive control law of positive and negative sequence with high dynamic performance by using the damping injection method.Then,added quasi-PR circulation control strategy under the non-ideal condition and capacitive voltage controller to improve system performance.Finally,the effectiveness and superiority of this control strategy applied to active power filter under the conditions of power grid balance,load switching,load imbalance and voltage drop are verified by Matlab/Simulink software simulation and hardware experiment.

关 键 词：非理想条件 模块化多电平变流器 并联型有源滤波器 无源控制 正负序分离 

分 类 号：TM46[电气工程—电器]