Power grid stability protection against GIC using a capacitive grounding circuit

Author

Rajapakse, A.D. ; Perera, N. ; Faxvog, F.R. ; Jensen, W. ; Nordling, G. ; Fuchs, G. ; Jackson, D.B. ; Volkmann, T.L. ; Ruehl, N. ; Groh, B.

Author_Institution

Univ. of Manitoba, Winnipeg, MB, Canada

fYear

2012

fDate

7-10 May 2012

Firstpage

1

Lastpage

6

Abstract

This paper investigates a method to minimize the flow of geo-magnetically induced currents (GIC) through power transformers. The solution examined was an AC grounding path provided by a capacitor between the earth ground and the neutral point of a power transformer only when GIC was detected. The effectiveness and problems of this approach were investigated through simulation of a 765 kV transmission system in an electromagnetic transient (EMT) simulation program.

Keywords

earthing; geomagnetism; power capacitors; power grids; power system stability; power transformer protection; power transmission protection; AC grounding path; EMT simulation program; GIC; capacitive grounding circuit; capacitor; earth ground; electromagnetic transient simulation program; geomagnetically induced current flow; power grid stability protection; power transformers; transmission system; voltage 765 kV; Assembly; Capacitors; Circuit faults; Grounding; Harmonic analysis; Surges; Switches; GIC; MOV; SolidGround™; capacitor; grounding circuit; harmonics; operational stability; power grid; transformer protection;

fLanguage

English

Publisher

ieee

Conference_Titel

Transmission and Distribution Conference and Exposition (T&D), 2012 IEEE PES

Conference_Location

Orlando, FL

ISSN

2160-8555

Print_ISBN

978-1-4673-1934-8

Electronic_ISBN

2160-8555

Type

conf

DOI

10.1109/TDC.2012.6281589

Filename

6281589