电测与仪表2024，Vol.61Issue(10)：144-152,9.DOI:10.19753/j.issn1001-1390.2024.10.019
新型电力系统下低压直流配网的接地故障保护方法
Grounding fault protection method for low-voltage DC distribution network under novel power system
摘要
Abstract
The low-carbon transformation and the construction of novel power system based on a safe,efficient,flexible and reliable distribution network will play a pivotal role in the realization of"carbon peaking and carbon neutrality"goals.This paper takes the low voltage direct current(LVDC)distribution network system as the re-search object,a human body protection method using insulated gate bipolar transistor(IGBT)is proposed to con-struct a switching bypass for the grounding fault problem on the low voltage side of the distribution network.The grounding fault equivalent model is established for theoretical analysis,the switching bypass signal protecting hu-man body is generated through the fault threshold identification criterion,and different types of grounding faults are distinguished.Considering the influence of multi-branch fault conditions on the protection criterion of bypass switc-hing,the fault value range is divided,and the hierarchical protection scheme of bypass switching is further pro-posed.A physical model is built to verify the protection method.The experimental results show that the proposed protection method can protect human safety with the advantages of good sensitivity,safety and controllability,also can significantly improve the operation stability of the distribution network system.关键词
新型电力系统/低压直流配网/旁路投切/分级保护Key words
novel power system/low voltage DC distribution network/bypass switching/hierarchical protection分类
信息技术与安全科学引用本文复制引用
王华昕,刘健,邹龙,麻宁杰,邓祥力..新型电力系统下低压直流配网的接地故障保护方法[J].电测与仪表,2024,61(10):144-152,9.基金项目
国家自然科学基金资助项目(51777119) （51777119）
