Thyristor controlled ground fault current limiting system for ungrounded power distribution systems

Author

Sugimoto, S. ; Neo, S. ; Arita, H. ; Kida, J. ; Matsui, Y. ; Yamagiwa, T.

Author_Institution

Electr. Power Res. & Dev. Center, Chubu Electr. Power Co. Inc., Nagoya, Japan

Volume

11

Issue

2

fYear

1996

fDate

4/1/1996 12:00:00 AM

Firstpage

940

Lastpage

945

Abstract

A thyristor controlled ground fault current limiting system (TGCL) was proposed to prevent one-line ground fault current rises due to increased capacitance to ground. Basic components of the TGCL are a main ground fault current limiter, which rapidly adjusts a compensating reactor level for the capacitance to ground, and the TGCL´s controller. Control is ensured by an in-phase control method for zero-phase sequence voltage and current. The method determines the direction of ground faults and the compensating reactor level. The fast control which can be realized shows the TGCL is a valuable protecting system for high ground fault current distribution systems

Keywords

current limiters; distribution networks; overcurrent protection; power system control; power system protection; thyristor applications; capacitance to ground; compensating reactor level; in-phase control method; one-line ground fault current rises; thyristor controlled ground fault current limiting system; ungrounded power distribution systems; zero-phase sequence current; zero-phase sequence voltage; Capacitance; Circuit faults; Control systems; Fault current limiters; Fault currents; Inductors; Power distribution; Power system reliability; Protection; Substations; Thyristors; Transformers; Voltage control;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.489355

Filename

489355