Mitigation of Geomagnetically Induced Currents by Neutral Switching

Baris Kovan, Francisco De Leon

Research output: Contribution to journalArticle

Abstract

This paper presents a novel mitigation technique to reduce the effects of geomagnetically induced currents (GICs) on high-voltage power systems. The method consists of connecting switching devices at the neutral grounding connection point of transformer banks. Only one transformer bank needs to be grounded through a switch to reduce GIC in a two-terminal system. For multiterminal systems, n-1 switches are necessary and the operation is independent from each other. The switching frequency and the duty cycle are selected from a tradeoff between the effectiveness of the method and the detection of fault currents. Transient simulations on a two-bus 230/500 kV system show that the proposed switching at the neutral successfully mitigates the GIC. This proposed technique opens the door to a new family of GIC mitigation methods.

Original languageEnglish (US)
Article number7111318
Pages (from-to)1999-2006
Number of pages8
JournalIEEE Transactions on Power Delivery
Volume30
Issue number4
DOIs
StatePublished - Aug 1 2015

Fingerprint

Induced currents
Switches
Electric fault currents
Switching frequency
Electric grounding
Electric potential

Keywords

  • Geomagnetic disturbance (GMD)
  • geomagnetically induced current (GIC)
  • geomagnetism
  • half-cycle saturation

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology

Cite this

Mitigation of Geomagnetically Induced Currents by Neutral Switching. / Kovan, Baris; De Leon, Francisco.

In: IEEE Transactions on Power Delivery, Vol. 30, No. 4, 7111318, 01.08.2015, p. 1999-2006.

Research output: Contribution to journalArticle

@article{71d41c7792584536b0411864280512f7,
title = "Mitigation of Geomagnetically Induced Currents by Neutral Switching",
abstract = "This paper presents a novel mitigation technique to reduce the effects of geomagnetically induced currents (GICs) on high-voltage power systems. The method consists of connecting switching devices at the neutral grounding connection point of transformer banks. Only one transformer bank needs to be grounded through a switch to reduce GIC in a two-terminal system. For multiterminal systems, n-1 switches are necessary and the operation is independent from each other. The switching frequency and the duty cycle are selected from a tradeoff between the effectiveness of the method and the detection of fault currents. Transient simulations on a two-bus 230/500 kV system show that the proposed switching at the neutral successfully mitigates the GIC. This proposed technique opens the door to a new family of GIC mitigation methods.",
keywords = "Geomagnetic disturbance (GMD), geomagnetically induced current (GIC), geomagnetism, half-cycle saturation",
author = "Baris Kovan and {De Leon}, Francisco",
year = "2015",
month = "8",
day = "1",
doi = "10.1109/TPWRD.2015.2434411",
language = "English (US)",
volume = "30",
pages = "1999--2006",
journal = "IEEE Transactions on Power Delivery",
issn = "0885-8977",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "4",

}

TY - JOUR

T1 - Mitigation of Geomagnetically Induced Currents by Neutral Switching

AU - Kovan, Baris

AU - De Leon, Francisco

PY - 2015/8/1

Y1 - 2015/8/1

N2 - This paper presents a novel mitigation technique to reduce the effects of geomagnetically induced currents (GICs) on high-voltage power systems. The method consists of connecting switching devices at the neutral grounding connection point of transformer banks. Only one transformer bank needs to be grounded through a switch to reduce GIC in a two-terminal system. For multiterminal systems, n-1 switches are necessary and the operation is independent from each other. The switching frequency and the duty cycle are selected from a tradeoff between the effectiveness of the method and the detection of fault currents. Transient simulations on a two-bus 230/500 kV system show that the proposed switching at the neutral successfully mitigates the GIC. This proposed technique opens the door to a new family of GIC mitigation methods.

AB - This paper presents a novel mitigation technique to reduce the effects of geomagnetically induced currents (GICs) on high-voltage power systems. The method consists of connecting switching devices at the neutral grounding connection point of transformer banks. Only one transformer bank needs to be grounded through a switch to reduce GIC in a two-terminal system. For multiterminal systems, n-1 switches are necessary and the operation is independent from each other. The switching frequency and the duty cycle are selected from a tradeoff between the effectiveness of the method and the detection of fault currents. Transient simulations on a two-bus 230/500 kV system show that the proposed switching at the neutral successfully mitigates the GIC. This proposed technique opens the door to a new family of GIC mitigation methods.

KW - Geomagnetic disturbance (GMD)

KW - geomagnetically induced current (GIC)

KW - geomagnetism

KW - half-cycle saturation

UR - http://www.scopus.com/inward/record.url?scp=84937864957&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84937864957&partnerID=8YFLogxK

U2 - 10.1109/TPWRD.2015.2434411

DO - 10.1109/TPWRD.2015.2434411

M3 - Article

VL - 30

SP - 1999

EP - 2006

JO - IEEE Transactions on Power Delivery

JF - IEEE Transactions on Power Delivery

SN - 0885-8977

IS - 4

M1 - 7111318

ER -