会议专题

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

  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.

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

Huangzhang Liu Zexin Zhou Xingguo Wang

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

国际会议

第六届现代电力系统自动化和保护国际会议

南京

英文

2-5

2015-09-21(万方平台首次上网日期,不代表论文的发表时间)