Detection and Location of Ground Faults Using a Discernible Signal

Author

Zhang, H.F. ; Pan, Z.C. ; Tian, Z.G.

Author_Institution

Coll. of Electr. Eng., Shandong Univ., Jinan

fYear

2005

fDate

2005

Firstpage

1

Lastpage

4

Abstract

It is very difficult to correctly detect the faulty line and fault location when a single phase to ground fault (SFG) occurs in distribution system with non-effectively grounded neutral. After analyzing the characteristics of the loop of faulty circuit including the potential transformer (PT), it is found that the faulted phase of PT is idle during a SFG. According to fact described above, an approach for ground fault localization and faulted feeder identification using a discernible signal on non-effectively grounded neutral systems is described. The discernible signal is supplied by a special signal generator and is coupled to the primary distribution system through PT when a fault occurs. After the faulty feeder and fault location are determined, the signal generator will be removed. The feasibility of the approach has been verified in field distribution systems

Keywords

fault location; potential transformers; power distribution faults; signal generators; SFG; discernible signal; distribution system; faulted feeder identification; faulty circuit loop; faulty line detection; feasibility; field distribution systems; ground fault localization; noneffectively grounded neutral; potential transformer; signal generator; single phase-ground fault; Capacitance; Circuit faults; Educational institutions; Electrical fault detection; Fault currents; Fault detection; Fault diagnosis; Fault location; Phase detection; Voltage; Discernible signal; Fault detection; Fault location; Ground faults; Non-effectively grounded neutral system;

fLanguage

English

Publisher

ieee

Conference_Titel

Transmission and Distribution Conference and Exhibition: Asia and Pacific, 2005 IEEE/PES

Conference_Location

Dalian

Print_ISBN

0-7803-9114-4

Type

conf

DOI

10.1109/TDC.2005.1546976

Filename

1546976