Fast ferroresonance suppression of coupling capacitor voltage transformers

Author

Graovac, Milan ; Iravani, Reza ; Wang, Xiaolin ; McTaggart, Ross D.

Author_Institution

Electr. & Comput. Eng. Dept., Univ. of Toronto, Ont., Canada

Volume

18

Issue

1

fYear

2003

fDate

1/1/2003 12:00:00 AM

Firstpage

158

Lastpage

163

Abstract

This paper describes a procedure for fast suppression of the phenomenon of ferroresonance in coupling capacitor voltage transformers (CCVT) without major change in the CCVT design. It is shown that it is possible to adjust parameters of the secondary overvoltage protection and the filter circuit so that the ferroresonance can be cleared in a very short time interval. The study cases reported in this paper show that ferroresonance is effectively cleared within two cycles. An implementation of metal oxide varistors (MOV) as part of passive ferroresonance protection is also addressed. The Electromagnetic Transients Program (EMTP) is used for modeling transients and fine-tuning the ferroresonance suppressing circuit. The studies are conducted on the Trench TEHMP161A CCVT.

Keywords

EMTP; ferroresonance; overvoltage protection; potential transformers; power system protection; varistors; voltage measurement; EMTP; Electromagnetic Transients Program; Trench TEHMP161A CCVT; coupling capacitor voltage transformers; fast ferroresonance suppression; filter circuit; metal oxide varistors; secondary overvoltage protection; transients modelling; voltage measurement; Capacitors; Coupling circuits; EMTP; Electromagnetic modeling; Ferroresonance; Filters; Protection; Varistors; Voltage control; Voltage transformers;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/TPWRD.2002.803837

Filename

1159912