郑涛;吴琼;吕文轩;王兴国;曹虹;

• 1:新能源电力系统国家重点实验室(华北电力大学)
• 2:中国电力科学研究院有限公司

摘要(Abstract)：

直流线路故障的快速、可靠识别,是柔性直流配电网发展在继电保护方面所面临的技术难点之一。针对基于具有直流故障自清除能力换流器的柔性直流配电系统,重点研究系统双极短路故障时的故障特性,并利用其故障电流迅速增大的特点,提出基于直流电流过零检测的保护方案。方案通过识别线路两端出现直流电流过零时刻的异同,确定故障线路并完成故障隔离。该保护方案原理简单且易于实现,能够快速识别故障线路。在PSCAD/EMTDC仿真软件中搭建柔性直流配电系统模型,通过大量仿真验证了该保护方案的可行性。

关键词(KeyWords)： 柔性直流配电网;FBSM-MMC;电流过零;故障识别

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划项目(智能电网技术与装备重点专项)(2016YFB0900600);; 国家电网公司科技项目(521104180002)~~

作者(Author): 郑涛;吴琼;吕文轩;王兴国;曹虹;

Email:

DOI: 10.13335/j.1000-3673.pst.2019.1051

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