节点文献
MMC拓扑结构对直流侧故障的分析研究
Analysis of MMC- HVDC topology for fault in DC system
【Author】 ZHOU Zhen;XIA Xiangyang;ZHOU Yun;College of Electrical and Information Engineering,Changsha University of Science and Technology;
【机构】 长沙理工大学电气学院；
【摘要】 电压源换流器的拓扑结构对柔性直流输电系统直流侧故障恢复能力有着很大的影响,本文对模块化多电平换流器(modular multilevel converter,MMC)的两种典型子模块结构——半桥子模块和箝位双子模块进行直流侧故障处理机制研究分析,通过比较两种拓扑下的系统故障暂态工况,得出箝位双子模块使系统直流暂时性故障的恢复更快、电气波动更小,且更容易实现。最后,通过PSCAD/EMTDC仿真对比实验,采用箝位双子模块的MMC-HVDC系统拓扑结构对于提高系统的暂态性能及故障恢复能力更有利。
【Abstract】 The topology of the voltage source converter has a great influence to flexible HVDC system fault recovery capability. In this paper, we analyzed the fault mechanisms of two different converter topology, one is modular multilevel converter(MMC) based HVDC which based on half bridge sub-module(HBSM), and the other one is a new type of bipolar MMC-HVDC which based on clamp double sub-module(CDSM). We compared the fault characteristics of DC transmission system based on HBSM-MMC with CDSM-MMC through PSCAD,find out with the topology of CDSM-MMC made the system dc temporary failure recovery faster, smaller electric wave, and easier to implement.As a conclusion,we proposed use the topology of CDSM-MMC to improve the system transient performance and fault recovery capability.
【Key words】 modular multilevel converter； half bridge sub-module； clamp double sub-module； dc fault； topology；
- 【会议录名称】 中国电工技术学会学术年会——新能源发电技术论坛论文集
- 【会议名称】中国电工技术学会学术年会——新能源发电技术论坛
- 【会议时间】2013-10-19
- 【会议地点】中国山东威海
- 【分类号】TM721.1
- 【主办单位】中国电工技术学会