MMC均压控制参数优化研究  

Research on optimization of MMC parameters for voltage balancing

作　　者：陈波[1] 杨帆[1] 黄凯成 朱坤 陈浩 Chen Bo;Yang Fan;Huang Kaicheng;Zhu Kun;Chen Hao(School of Electrical Engineering and Automation,Hefei University of Technology Hefei 230009,China;State Grid Luan Power Supply Lu'an 237006,China)

机构地区：[1]合肥工业大学电气与自动化工程学院,合肥230009 [2]国家电网六安供电公司,六安237006

出　　处：《电子测量与仪器学报》2019年第12期19-24,共6页Journal of Electronic Measurement and Instrumentation

基　　金：国家重点研发计划(2017YFB0903504)资助项目。

摘　　要：模块化多电平换流器(MMC)因特殊的级联拓扑导致了子模块电容电压均衡和以二倍频负序为主的环流问题,使桥臂正弦特性电流波形发生畸变,危害换流器安全运行。在现有的MMC电容电压均衡控制系统的基础上,研究了基于蚁群算法的分数阶PI控制在MMC电容电压均衡中的应用,以绝对误差积分准则作为目标函数,通过分数阶PI的引入增强了控制器对输入指令的追踪能力,利用蚁群算法的最短路径寻优能力对控制器参数进行优化整定,增强了电容电压均衡能力与环流抑制能力。通过MATLAB/Simulink仿真验证了所提策略的有效性,波形THD从44.25%下降至12.28%。The sinusoidal current in the bridge arm is distorted by the double frequency current of negative sequence in modular multilevel converter(MMC), which endangers the safe running of the converter. The application of fractional order PI(FOPI) control based on ant colony optimization(ACO) in MMC circulation suppression is studied, ACO is used to optimize the PI parameters, and the integrated time absolute error criterion(ITAE) is used as the objective function, the ability of reference tracking and voltage balancing for this system is enhanced. The result of this paper is validated in Matlab/Simulink, the THD decreased from 44.25% to 12.28%.

关 键 词：模块化多电平换流器 蚁群算法 分数阶 ITAE 

分 类 号：TM64[电气工程—电力系统及自动化]