Title :
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
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;
Conference_Titel :
Transmission and Distribution Conference and Exhibition: Asia and Pacific, 2005 IEEE/PES
Conference_Location :
Dalian
Print_ISBN :
0-7803-9114-4
DOI :
10.1109/TDC.2005.1546976
