Ground-Fault Protection of Four-Pole Generators With Two Parallel Branches in Phase Winding

Author

Zielichowski, Mieczyslaw ; Szlezak, Tomasz

Author_Institution

Inst. of Electr. Power Eng., Tech. Univ. Wroclaw

Volume

22

Issue

2

fYear

2007

fDate

4/1/2007 12:00:00 AM

Firstpage

813

Lastpage

819

Abstract

An analysis of the operating conditions of a third harmonic ground-fault protection system for a four-pole generator with two parallel branches in the phase winding was carried out. The voltage exciting the measuring element of the protection system for various neutral grounding configurations was determined. The influence of the neutral grounding configurations on the exciting voltage was examined through simulations. The operating conditions of the protection system were determined taking into account the actual third harmonic distribution along the stator winding, the to-ground capacitances of the generator breakers, and the real ground-fault arc resistance

Keywords

capacitance; earthing; electric generators; electrical faults; machine protection; stators; actual third harmonic distribution; four-pole generators; generator breakers; ground-fault arc resistances; ground-fault protection; neutral grounding configurations; phase winding; stator winding; to-ground capacitances; Capacitance; Circuit faults; Fault location; Grounding; Harmonic analysis; Power generation; Power system harmonics; Power system protection; Stator windings; Voltage measurement; Fault location; power generation protection; turbogenerators; winding;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/TPWRD.2007.893358

Filename

4141182