基于MMC的同相供电潮流控制器控制策略研究  

Study on the control strategy of power flow controller based on MMC in co-phase power supply system

作　　者：肖刚 张译文[2] 郭育华[2] 王莉[2] XIAO Gang ZHANG Yiwen GUO Yuhua WANG Li(Sichuan Aerospace Polytechnic, Chengdu 610100, China Key Laboratory of Magnetic Suspension Technology and Maglev Vehicle, Southwest Jiaotong University, Chengdu 610031, China)

机构地区：[1]四川航天职业技术学院,四川成都610100 [2]西南交通大学磁浮技术与磁浮列车教育部重点实验室,四川成都610031

出　　处：《电力系统保护与控制》2017年第14期79-84,共6页Power System Protection and Control

基　　金：中国铁路总公司重点科技项目(2015J005-A)

摘　　要：模块化多电平换流器(MMC)与平衡变压器相结合的潮流控制器(PFC),可节省传统牵引供电系统中的匹配变压器,满足高压大功率的应用。首先介绍了系统工作原理,重点研究了其中单相MMC背靠背换流器两端的补偿电流。提出了一种综合控制策略,包括变流器两端补偿电流的提取算法,子模块电容电压均衡控制,环流抑制策略以及PWM调制方法。最后在Matlab/Simulink中搭建了系统模型,分别对交直交型电力机车的牵引和再生制动工况进行仿真,验证了所提控制策略的有效性。A novel power flow controller（PFC）, which combines modular multilevel converter（MMC） with balancing transformer, can save the matching transformer in traditional traction power supply system and meet the requirement in high-voltage and high-power application. Firstly, this paper introduces the operating principle of the system, especially the desired compensating currents of single-phase back-to-back converter. Then it puts forward an integrated control strategy, which includes the algorithm of extracting the compensation current, the control of the capacitor voltage of the sub module, circulating current suppression strategy, and the PWM method. Finally, a simulation model is constructed in Matlab/Simulink, AC-DC-AC electric locomotive at traction/braking mode are simulated respectively. The simulation results verify its effectiveness.

关 键 词：同相供电 模块化多电平换流器 潮流控制器 控制策略 

分 类 号：U223.6[交通运输工程—道路与铁道工程]