一种可阻断直流故障电流的双逆阻型MMC研究  

A dual reverse blocking sub-module based MMC with DC fault current blocking capability

作　　者：杨波 庄俊 姚运昌 景妍妍 姚良忠 曲小慧[1] 陈武[1] YANG Bo;ZHUANG Jun;YAO Yunchang;JING Yanyan;YAO Liangzhong;QU Xiaohui;CHEN Wu(School of Electrical Engineering,Southeast University,Nanjing 210096,China;Jiangsu Engineering Technology Research Center for Energy Storage Conversion and Application,China Electric Power Research Institute Co.,Ltd.,Nanjing 210003,China)

机构地区：[1]东南大学电气工程学院,江苏南京210096 [2]江苏省储能变流及应用工程技术研究中心(中国电力科学研究院有限公司),江苏南京210003

出　　处：《电力系统保护与控制》2019年第24期39-46,共8页Power System Protection and Control

基　　金：国家电网公司科技项目资助(5500-201918249A-0-0-00);中国电科院创新基金项目资助(NY83-18-007);国家自然科学基金项目资助(51677028)~~

摘　　要：可阻断直流故障电流的模块化多电平变换器(Modular Multilevel Converter, MMC)在高压直流输电工程中具有广泛的应用前景。提出一种可阻断故障电流的基于新型双逆阻型子模块(DualReverseBlockingSub-Module,DRBSM)的MMC拓扑结构。在输出相同电平数的前提下,与现有拓扑相比,DRBSM型MMC具有较强的直流故障电流阻断能力和更低的功率损耗,且DRBSM型MMC可直接移植半桥子模块(HBSM)型MMC拓扑的控制和调制策略。亦对该子模块结构的拓扑构成、运行原理及故障电流阻断机理进行分析。最后,采用PSCAD/EMTDC仿真验证了该拓扑结构的可行性和有效性。The Modular Multilevel Converter(MMC) with DC fault current blocking capacity has broad application prospects in High Voltage Direct Current(HVDC) transmission applications. This paper proposes a novel Dual Reverse Blocking Sub-Module(DRBSM) based MMC with DC fault current blocking capability. Under the same output voltage level, the DRBSM based MMC has a strong DC fault current blocking capability and less power losses compared with existing topologies. Moreover, the DRBSM based MMC can adopt the simple control and modulation strategy of the HBSM based MMC directly. This paper also analyzes the DRBSM structure, operation principle and DC fault current blocking mechanism. Finally, the feasibility and validity of the topological structure is verified by PSCAD/EMTDC simulation.

关 键 词：高压直流输电 模块化多电平换流器 双逆阻型子模块 故障电流阻断能力 功率损耗 

分 类 号：TM721.1[电气工程—电力系统及自动化] TM46