Overvoltages on distribution systems

Author

Du, S. Lam ; Tran-Quoc, T. ; Huy, H. Vo V ; Nguyen-Boi, K. ; Nguyen, Q.

Author_Institution

HCM City Electr. Co., Viet Nam

Volume

1

fYear

1998

fDate

18-21 Aug 1998

Firstpage

246

Abstract

In the framework of live working in a MV network, a cable-transformer system can be switched-off or switched-on. The ferroresonance phenomenon can occur during this procedure with very dangerous overvoltages. The metal oxide varistor (MOV) can fail during this phenomenon. The paper investigates the determination of the critical feeder length of cable, which will damage MOVs. A transformer model taking into account both the saturation and the hysteresis is proposed. The digital simulation concerning de-energization of the real configuration of the cable-transformer system is studied and the results obtained are verified by field tests

Keywords

arresters; ferroresonance; overvoltage protection; power cables; power distribution protection; power transformers; varistors; MV network; cable-transformer system; critical feeder cable length; de-energization; digital simulation; distribution system overvoltages; ferroresonance phenomenon; hysteresis; metal oxide varistor; surge arrester; transformer model; Arresters; Circuit breakers; Circuit faults; Cities and towns; Ferroresonance; Power cables; Power transformers; Saturation magnetization; Surges; Switching circuits;

fLanguage

English

Publisher

ieee

Conference_Titel

Power System Technology, 1998. Proceedings. POWERCON '98. 1998 International Conference on

Conference_Location

Beijing

Print_ISBN

0-7803-4754-4

Type

conf

DOI

10.1109/ICPST.1998.728963

Filename

728963