非理想条件下MMC-DVR的PBC和SMC混合控制策略  

PBC and SMC Hybrid Control Strategy of MMC-DVR under Non-ideal Condition

作　　者：林波 楼晓东 程启明 郑伟华 龚淼 宋喆 LIN Bo;LOU Xiao-dong;CHENG Qi-ming;ZHENG Wei-hua;GONG Miao;SONG Zhe(State Grid Shanghai Electric Power Company, Shanghai 200122, China;School of Automation Engineering, Shanghai University of Electric Power, Shanghai 200090, China)

机构地区：[1]国网上海市电力公司,上海200122 [2]上海电力大学自动化工程学院,上海200090

出　　处：《科学技术与工程》2022年第19期8347-8354,共8页Science Technology and Engineering

基　　金：国家自然科学基金(61905139);上海市电站自动化技术重点实验室项目(13Z2273800)。

摘　　要：动态电压调节器(dynamic voltage regulator,DVR)与模块化多电平转换器(modular multi-level converter,MMC)组合的MMC-DVR可用于解决中高电压的动态电压补偿问题。但当电网电压不平衡较大时,采用传统的比例积分微分(proportional integral differential,PID)控制或者单一的无源性控制(passivity-based control,PBC)或单一的滑模控制(sliding mode control,SMC)均难以很好地对动态电压进行补偿控制。为此,提出了PBC+SMC两种控制方法的混合控制方法能够很好地解决电网电压不平衡时动态电压补偿问题。首先,推导出不平衡电网下MMC-DVR的数学模型;接着,针对目前控制方法存在问题,提出了PBC与SMC的混合控制策略用于MMC-DVR的动态电压补偿,解决了单一PBC控制方法的难以精确控制、响应速度慢、补偿效果不佳等问题;最后,在RTDS仿真实验平台上将PBC+SMC控制与PBC、PID两种控制进行实验效果比较,实验结果表明,MMC-DVR混合控制系统能够快速、准确地自动补偿动态电压,且该系统具有鲁棒性强、控制精度高等特点,从而验证了本文混合控制方法的有效性和优越性。The MMC-DVR,which is a combination of a dynamic voltage regulator(DVR)and a modular multilevel converter(MMC),can be used to solve the problem of dynamic voltage compensation for medium and high voltages.However,when the grid voltage imbalance is large,it is difficult to compensate the dynamic voltage well by using traditional proportional integral differential(PID)control or single passivity-based control(PBC)or single sliding mode control(SMC).Therefore,a hybrid control method of PBC+SMC was proposed,which can well solve the problem of dynamic voltage compensation under unbalanced grid voltage.First,the mathematical model of MMC-DVR under unbalanced grid voltage was derived;Then,in view of the problems of current control methods,a hybrid control strategy of PBC and SMC is proposed for dynamic voltage compensation of MMC-DVR,which solves a single PBC control method.Finally,the PBC+SMC control is compared with PBC control and PID control on the RTDS simulative experiment platform.The experimental results show that the MMC-DVR hybrid control system can quickly and accurately compensate the dynamic voltage,and it has the characteristics of strong robustness and high control accuracy,which verifies the effectiveness and superiority of the hybrid control method.

关 键 词：动态电压调节器 模块化多电平变流器 无源性控制 滑模控制 非理想条件 

分 类 号：TM711[电气工程—电力系统及自动化]