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The sensor of traveling-wave for fault location in power systems

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4 Author(s)
Zeng Xiangjun ; Coll. of Electr. & Inf. Eng., Changsha Univ. of Sci. & Technol., China ; Zhou Yanling ; Liu Zhengyi ; Lin Gan

The fault-generated high frequency signals contain much information which can be used to accurately locate the fault point in power systems. For capturing the high frequency signals, two specially designed traveling-wave sensors are developed in the paper. One is the current sensor installed on the earth line of capacitive equipment (such as: CVT, capacitive CT, transformer bushing, wall bushing) to capture the current traveling-waves flowing from the equipment to earth. The other is the voltage sensor installed at the zero sequence winding of a voltage transformer to capture the voltage traveling waves in three-phase generated by faults. The fault location system with the traveling wave sensors is also developed simply. The sensors and the fault location system have been tested on an 110 kV power system. Results show that the sensors have good performance to capture traveling-waves and the error of fault location is no more than 120 m.

Published in:

Power System Technology, 2004. PowerCon 2004. 2004 International Conference on  (Volume:2 )

Date of Conference:

21-24 Nov. 2004