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Title: GIC mitigation; A neutral blocking/bypass device to prevent the flow of GIC in power systems

Abstract

In this paper the design for a Neutral Blocking/Bypass Device which can be installed in power transformer neutral-ground connections to block the flow of GIC, is described. The device consists of standard distribution capacitors which provide the GIC blocking function. The capacitors are rapidly bypassed by a combination of a sparkgap and circuit breaker to solidly ground the neutral during power system disturbances. The sparkgap provides the fast operating response speed, while the circuit breaker provides a secure metallic bypass of the capacitor. Simulations indicate that the bypass device operation will occur rapidly (on the order of 1 msec or less) and will both prevent ferroresonant overvoltages and preserve proper relay and protective device operation.

Authors:
; ; ;  [1];  [2];  [3];  [4]
  1. Minnesota Power and Light Co., Duluth, MN (United States)
  2. Minnesota Univ., Minneapolis, MN (United States)
  3. ABB, Bloomington, IN (US)
  4. Electric Power Research Inst., Palo Alto, CA (United States)
Publication Date:
OSTI Identifier:
5853441
Resource Type:
Journal Article
Journal Name:
IEEE Transactions on Power Delivery (Institute of Electrical and Electronics Engineers); (United States)
Additional Journal Information:
Journal Volume: 6:3; Journal ID: ISSN 0885-8977
Country of Publication:
United States
Language:
English
Subject:
24 POWER TRANSMISSION AND DISTRIBUTION; POWER DISTRIBUTION SYSTEMS; CIRCUIT BREAKERS; DISTURBANCES; SAFETY; CAPACITORS; EQUIPMENT PROTECTION DEVICES; OVERVOLTAGE; PLANNING; TRANSFORMERS; ELECTRICAL EQUIPMENT; EQUIPMENT; 240100* - Power Systems- (1990-); 240400 - Power Transmission & Distribution- Health & Safety- (1990-)

Citation Formats

Kappenman, J G, Norr, S R, Sweezy, G A, Carlson, D L, Albertson, V D, Harder, J E, and Damsky, B L. GIC mitigation; A neutral blocking/bypass device to prevent the flow of GIC in power systems. United States: N. p., 1991. Web. doi:10.1109/61.85876.
Kappenman, J G, Norr, S R, Sweezy, G A, Carlson, D L, Albertson, V D, Harder, J E, & Damsky, B L. GIC mitigation; A neutral blocking/bypass device to prevent the flow of GIC in power systems. United States. https://doi.org/10.1109/61.85876
Kappenman, J G, Norr, S R, Sweezy, G A, Carlson, D L, Albertson, V D, Harder, J E, and Damsky, B L. 1991. "GIC mitigation; A neutral blocking/bypass device to prevent the flow of GIC in power systems". United States. https://doi.org/10.1109/61.85876.
@article{osti_5853441,
title = {GIC mitigation; A neutral blocking/bypass device to prevent the flow of GIC in power systems},
author = {Kappenman, J G and Norr, S R and Sweezy, G A and Carlson, D L and Albertson, V D and Harder, J E and Damsky, B L},
abstractNote = {In this paper the design for a Neutral Blocking/Bypass Device which can be installed in power transformer neutral-ground connections to block the flow of GIC, is described. The device consists of standard distribution capacitors which provide the GIC blocking function. The capacitors are rapidly bypassed by a combination of a sparkgap and circuit breaker to solidly ground the neutral during power system disturbances. The sparkgap provides the fast operating response speed, while the circuit breaker provides a secure metallic bypass of the capacitor. Simulations indicate that the bypass device operation will occur rapidly (on the order of 1 msec or less) and will both prevent ferroresonant overvoltages and preserve proper relay and protective device operation.},
doi = {10.1109/61.85876},
url = {https://www.osti.gov/biblio/5853441}, journal = {IEEE Transactions on Power Delivery (Institute of Electrical and Electronics Engineers); (United States)},
issn = {0885-8977},
number = ,
volume = 6:3,
place = {United States},
year = {1991},
month = {7}
}