基于MMC的直流电网故障分析和保护方案研究

康保林; 高亮; 屈子程

康保林,高亮,屈子程.基于MMC的直流电网故障分析和保护方案研究[J].电测与仪表,2020,57(13):130-136.
Kang Baolin,Gao Liang,Qu Zicheng.DC faults analysis and research on protection scheme of DC power grid[J].Electrical Measurement & Instrumentation,2020,57(13):130-136.

基于MMC的直流电网故障分析和保护方案研究

DC faults analysis and research on protection scheme of DC power grid

DOI：10.19753/j.issn1001-1390.2020.13.021

中文关键词: 直流电网故障分析故障检测方法保护方案

英文关键词:DC grid, fault analysis, fault detection method, protection scheme

基金项目:51777119

作者中文名	作者英文名	单位
康保林	Kang Baolin	上海电力大学电气工程学院
高亮	Gao Liang	上海电力大学电气工程学院
屈子程	Qu Zicheng	上海电力大学电气工程学院

摘要点击次数: 1489

中文摘要:

对MMC型直流输电系统直流侧故障检测方法及保护方案进行了研究。分析直流侧故障特性,提出了一种R-L并联限流结合电流变化率的故障检测方法,提高了故障检测速度。对采用直流断路器的故障处理方式,提出一种可有效解决出口断路器不正确动作时故障隔离问题的后备保护方案。运用PSCAD/EMTDC构建四端直流电网仿真模型,验证了故障检测方法和保护方案的有效性。

英文摘要:

In this paper, the DC-side fault detection and protection scheme of DC system are studied. The DC-side fault characteristics of DC system are analyzed. Then, a fault detection and localization scheme using the rate of change of current measured at the line side with the R-L parallel fault current limitation is proposed to improve the fault detection speed. A backup protection scheme for the fault isolation when the outlet breaker operates incorrectly is proposed for DC system which adopt DC breaker. A four-terminal DC grid simulation model is built based on thePSCAD/EMTDC to verify the effectiveness of the designed fault detection method and protection scheme.

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