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http://dx.doi.org/10.5762/KAIS.2018.19.5.689

Characteristics on the Neutral Point Potential of Line-to-Ground Voltage according to Line-to-Ground Fault in Resistance Ground System for Ships  

Lee, Yun-Hyung (Education Management Team, Korea Institute of Maritime and Fisheries Technology)
Ryu, Ki-Tak (Offshore Training Team, Korea Institute of Maritime and Fisheries Technology)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.19, no.5, 2018 , pp. 689-696 More about this Journal
Abstract
System grounding is applied to the neutral point of a power source to secure the from any abnormal voltage and/or grounding fault. System grounding, which is applied mainly in ships is an ungrounded and resistance grounded system. Vessels using the MV power system with 3.3kV, 6.6kV, and 11kV mainly adopt a high resistance grounding system among the resistance grounding systems. The ground fault accounts for 95% of all faults occurring in the electrical system and when a fault occurs, the line-to-ground voltage of the power system is increased excessively, which adversely affects the onboard insulation system. This study analyzed the variation characteristics of the line-to-ground voltage neutral point according to the degree of ground fault in a resistance ground system applied in vessels. For this purpose, the characteristics of the grounding system were first explained, and the modeling of the neutral point potential of the line-to-ground voltage of the resistance grounding system in the vessels was derived. Finally, this study examined how the line-to-ground voltage, line voltage, and neutral point change according to various variable environments through MATLAB simulations.
Keywords
Ground Fault; Line-to-Ground Voltage; Medium Voltage System; Neutral Point; Resistance Grounding System;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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1 IEEE Recommended Practice for Grounding of Industrial and Commercial Power Systems, IEEE std. 142-2007.
2 D. Paul and S. I. Venugopalan, "Low-Resistance Grounding Method for Medium-Voltage Power Systems", in Conf. Rec. IEEE IAS Annu. Meeting, pp. 1571-1579, 1991. DOI: https://doi.org/10.1109/IAS.1991.178070
3 L. J. Kingrey, R. D. Painter, and A. S. Locker, "Applying High Resistance Neutral Grounding in Mmedium Voltage Systems," IEEE Transactions on Industry Application, vol. 47, no. 3, pp. 1220-1231, 2011. DOI: https://doi.org/10.1109/TIA.2011.2126553   DOI
4 J. R. Dunki-Jacobs, F. J. Shields, and C. St. Pierre, Industrial Power System Grounding Design Handbook. Dexter, MI: Thomson-Shore, 2007.
5 B. Bridger, "High Resistance Grounding," IEEE Transactions on Industry Applications, vol. IA-19, no. 1, pp. 15-21, Jan./Feb. 1983. DOI: https://doi.org/10.1109/TIA.1983.4504149   DOI
6 NEMA WC5-1992/ICEA S-61-402, Thermal Plastic Insulated Wire and Cable for the Transmission and Distribution of Electrical Energy.
7 System Grounding for Low-voltage Power Systems, Catalog GET-3548(11-1975), Industrial Power System Engineering Operations, General Electric Company, Schenectady, NY 12345.
8 2008 National Electrical Code Handbook, 11th ed., Nat. Fire Protection Assoc., Quincy, MA, 2008.
9 D. D. Shipp, and F. J. Angelini, "Characteristics of Different Power Systems Grounding Techniques: Fact & Fiction," IEEE Trans. Ind. Appl. Ann. Mtg. Conf. Rec.,vol. 2, pp.1535-1544, 1988. DOI: https://doi.org/10.1109/IAS.1988.25261
10 B. Bridger, "What To Nnow about High Resistance Grounding," EC&M, pp. 37-46, Jul. 1994.
11 S. M. Choi, "Characteristics of Neutral Point Loci on Line Voltage to Hull When Insulation Resistance Collapses by Earthing Faults at 3 Phase Power Distribution Systems Onboard Vessels," Journal of the Korean Society of Marine Engineering, vol. 35, no. 8, pp. 1117-1123, 2011(in Korean). DOI: https://doi.org/10.5916/jkosme.2011.35.8.1117   DOI