A Distinguish Method of Overload and Transmission Line Fault Based on Ucos(φ) in Voltage Plane

摘要：

　　In allusion to the malfunction of distance protection caused by overload during large-scale blackout, a distinguish method of overload and transmission line fault based on Ucos(φ) in voltage plane is proposed.Characteristics of overload and transmission line faults are analyzed in voltage plane.For overload, Ucos(φ) is larger and for transmission line faults, Ucos(φ) is smaller.Different Ucos(φ)s are used to identify overload and transmission line faults.Simulation system is built in RTDS (Real Time Digital System), different overload and faults are simulated to verify the performance of scheme.The simulation results show that the scheme opens distance protection quickly in fault conditions and blocks it in overload conditions.The malfunction of distance protection due to the overload can be avoided.

关键词： Distance protection Overload current Transmission lined Voltage plane Ucos(φ)

作者: Huangzhang Liu Zexin Zhou Xingguo Wang

作者单位: Central China Grid Company Limited, Wuhan,Hubei Province, 430077 China China Electric Power Research Institute, Haidian District,Beijing, 100192 China

会议类型: 国际会议

会议名称: 第六届现代电力系统自动化和保护国际会议

会议地点: 南京

会议语种:英文

页码: 2-5

在线出版日期: 2015-09-21（万方平台首次上网日期，不代表论文的发表时间）