非理想电网电压下MMC-UPQC的PBC-SMC控制策略研究  

PBC-SMC control strategy of MMC-UPQC under non-ideal grid voltage

作　　者：朱纯 龚波涛 程启明 蒋谦 王晓锋 黄志豪 ZHU Chun;GONG Botao;CHENG Qiming;JIANG Qian;WANG Xiaofeng;HUANG Zhihao(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：《电机与控制学报》2023年第11期192-202,共11页Electric Machines and Control

基　　金：国家自然科学基金(61905139)。

摘　　要：针对非理想电网电压时模块化多电平换流器(MMC)和统一电能质量控制器(UPQC)组合而成的MMC-UPQC,采用单一的PID控制、无源性控制(PBC)、滑模控制(SMC)的电能质量不够理想问题,提出了PBC与SMC组合的无源性滑模控制(PBC-SMC)策略来提高电能质量。首先,推导出电网电压不平衡时MMC-UPQC的总体数学模型,并对电压与电流进行正序与负序分离;然后,针对当前单一的控制方法的补偿效果存在的问题,提出了MMC-UPQC的PBC-SMC控制策略来提高电压电流电能质量;最后,通过MATLAB/Simulink仿真验证了所提控制策略的正确性和可行性,基于PBC-SMC控制的MMC-UPQC系统能够很好地补偿电压电流,提升电能质量,且相比于PID和PBC控制,还有抗扰性更强、精确度更高、响应更快特点。A passivity-based control-sliding-mode control(PBC-SMC)strategy combining passivity-based control(PBC)and sliding-mode control(SMC)was proposed to improve the power quality of MMC-UP-QC,which is a combination of modular multi-level converters(MMC)and unified power quality control-lers(UPQC)under non ideal grid voltage conditions.The power quality of MMC-UPQC was not ideal due to the use of a single PID control,PBC control,and SMC control.Firstly,the overall mathematical model of MMC-UPQC is derived when the voltage of the power grid was unbalanced,and the positive and negative sequence of voltage and current were separated;Then,in response to the existing problems in the compensation effect of the current single control method,a PBC-SMC control strategy of MMC-UPQC was proposed to improve the voltage,current,and power quality;Finally,correctness and feasibility of the proposed PBC-SMC control strategy was verified on MATLAB/Simulink simulation.The MMC-UPQC system based on PBC-SMC control can effectively compensate for voltage and current,improve power quality,and has stronger anti-interference,higher accuracy,and faster response characteristics compared to PID control and PBC control.

关 键 词：统一电能质量控制器 模块化多电平换流器 无源性控制 滑模控制 非理想电网电压 

分 类 号：TM711[电气工程—电力系统及自动化]