摘要
分相电流差动保护装置中一般都配置零序差动保护 ,目的是为了提高保护装置的耐过渡电阻能力。经分析表明 ,零序差动保护并不比故障分量差动保护的灵敏度高 ,并且其整定需躲过外部三相短路时的不平衡电流。
Zero sequence current differential protection is expected to improve the performance under high resistance earth fault conditions in phase segregated current differential protection for transmission lines.The results of studies indicate that fault component based differential protection is more sensitive than zero sequence current differential protection.Sets of zero sequence current diifferential protection have to avoid external three phase fault imbalance current. The performance of sensitivity and trip time can not be improved by zero sequence current differential protection.
出处
《继电器》
CSCD
北大核心
2002年第12期42-44,共3页
Relay
关键词
线路保护
电力系统
继电保护
零序电流差动
分相电流差动
故障分量差动
zero sequence current differential protection
phase segregated current differential protection
fault component based differential protection
relay protection
