电测与仪表2018，Vol.55Issue(5)：51-56,6.
基于电流差动的直流配电网保护方案
Protection scheme of DC distribution network based on differential current
吉兴全 1孙灏 1陈尔奎 1史小雪 1张玉振1
作者信息
摘要
Abstract
Aiming at the problem that the short circuit current rises rapidly and the DC breaker cannot move quickly and cut off the fault in the DC distribution network when the short circuit fault occurs.In this paper,a power source model is built based on DC distribution network by a three-phase two-level voltage source converter (VSC) and supply power.The fault characteristics of the short circuit fault and mono-polar grounding fault to passive network were analyzed,a united protection scheme of the under voltage protection and current differential protection was proved and improved power supply reliability by switching back power supply.Finally,the simulation verification is carried out on the PSCAD/EMTDC platform.The results show that the protection scheme can act quickly and reliably when short circuit fault occurs in DC distribution network,and has good selectivity and sensitivity.关键词
直流配电网/故障分析/无源网络/欠电压保护/电流差动保护Key words
DC distribution network/fault analysis/passive network/under voltage protection/current differential protection分类
信息技术与安全科学引用本文复制引用
吉兴全,孙灏,陈尔奎,史小雪,张玉振..基于电流差动的直流配电网保护方案[J].电测与仪表,2018,55(5):51-56,6.
