李国庆;王威儒;贺之渊;辛业春;谷怀广;

• 1:东北电力大学电气工程学院
• 2:全球能源互联网研究院有限公司

摘要(Abstract)：

直流电网接地故障将引起换流器闭锁,进而扩大故障影响面积,配置直流限流器及直流断路器是解决上述问题的通用方案。运用了2组耦合电感,针对高压直流电网设计了多端口直流限流断路器。该设备包括初级限流器、故障隔离限流器、引流支路3个部分,其中前两者串联在同一直流母线的各条线路中,引流支路是各条直流线路所共用的部分。不同部分的开关器件通过相互配合、互相借用的方式来提高限流断路器的经济性。在PSCAD仿真软件上搭建了张北四端直流电网模型,并与其他几种已有方案进行了比较,结果表明文中所提出的限流断路器能够在6ms内完成电力电子器件相关动作,各开关组所受冲击电压较低,若将其应用于n端口直流母线,则仅需要(26n+502)个开关组,经济性较高。

关键词(KeyWords)： 多端口直流电网;耦合电感;限流断路器;经济性

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(51677023)~~

作者(Author): 李国庆;王威儒;贺之渊;辛业春;谷怀广;

Email:

DOI: 10.13335/j.1000-3673.pst.2019.2197

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