不平衡电网下MMC-SAPF无源性滑模控制策略研究  

Research on Passivity-based Sliding-mode Control Strategy of MMC-SAPF Under Unbalanced Power Grid

作　　者：莫栋成 程启明 周雅婷 MO Dongcheng;CHENG Qiming;ZHOU Yating(Applied Technology College,Soochow University,Suzhou 215325,China;School of Management,University of Shanghai for Science and Technology,Shanghai 200093,China;School of Automation Engineering,Shanghai University of Electric Power,Shanghai 200090,China)

机构地区：[1]苏州大学应用技术学院,江苏苏州215325 [2]上海理工大学管理学院,上海200093 [3]上海电力大学自动化工程学院,上海200090

出　　处：《控制工程》2023年第9期1720-1729,共10页Control Engineering of China

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

摘　　要：模块化多电平换流器(modular multilevel converter,MMC)-并联式有源滤波器(shunt active power filter,SAPF)能够补偿大电压时电能中的电流质量,但若采用单一控制方法难以很好地对电流质量进行补偿。为此,提出了无源性控制(passivity-basedcontrol,PBC)与滑模控制(sliding mode control,SMC)相结合的无源性滑模控制补偿方法,用以提升电流质量。首先,推导出不平衡电网下MMC-SAPF的数学模型,并对电压和电流进行正负序分离;然后,针对单一控制方法存在的问题,提出了基于MMC-SAPF的无源性滑模控制方法;最后,搭建了MMC-SAPF系统实验平台,将无源性滑模控制与PID和PBC 2种控制方法进行比较,结果表明无源性滑模控制的精度更高、鲁棒性更强、响应更快,且能够快速、准确地补偿电流。The modular multilevel converter(MMC)-shunt active power filter(SAPF)can compensate the current quality in electric energy at high voltage.However,it is difficult to use single control method to compensate the current quality.Therefore,a passive sliding mode control compensation method combining passive based control(PBC)and sliding mode control(SMC)is proposed to improve current quality.Firstly,the mathematical model of MMC-SAPF under unbalanced power grid is derived,and the positive and negative sequence separation of voltage and current is performed.Then,for the problems of a single control method,a passive sliding mode control compensation method is proposed for power quality of MMC-SAPF.Finally,the MMC-SAPF system experimental platform is built,and the passive sliding mode control is compared with PID and PBC control methods.The experimental results show that the passive sliding mode control has the characteristics of higher control accuracy,stronger robustness,and faster response,and the system can quickly and accurately compensate the current.

关 键 词：不平衡电网电压 模块化多电平变流器 并联式有源滤波器 无源性控制 滑模控制 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置] TM711[自动化与计算机技术—控制科学与工程]