Journal of Advanced Marine Engineering and Technology

The Korean Society of Marine Engineering (한국마린엔지니어링학회)
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Analysis on How to Locate the Maximum Line Voltage to Hull in Steady State on the Vector Diagram Onboard Vessels

  • Choi, Soon-Man (Korea Institute of Maritime and Fisheries Technology)
  • Received : 2011.11.16
  • Accepted : 2011.11.28
  • Published : 2011.11.30
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Abstract

Power distribution onboard vessel is typically configured as ungrounded system due to the ability to continuously supply electric power even when an earth fault occurs. The impedance connections between 3 phase power lines and hull cause the line-to-hull voltages to become unstable and increased in case the impedances are unbalanced, bringing the situation susceptible to electric shock and deterioration of insulation material. Also the line-to-hull voltage can reach to a certain maximum value in the steady state depending on the distributed capacitances and grounding resistances between lines and hull. This study suggests how to find and calculate the maximum line-to-hull voltage in view of magnitude and phase angle based on the vector diagram.

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References

  1. G.O. Watson, "Marine Electrical Practice", 5th edition, Butterworth & Co Ltd, 1981.
  2. M.O. Durham and R. Durham, "Grounding system design for isolated locations and plant systems", IEEE Trans. Ind. Applications., vol. 33, pp. 374-382, 1997. https://doi.org/10.1109/28.567998
  3. Kingrey, L.J., Painter, R.D., Locker, A.S., "Applying high resistance neutral grounding in medium voltage systems", IEEE transactions on industry applications, vol. 47, no. 3, pp. 1220-1231, 2011. https://doi.org/10.1109/TIA.2011.2126553
  4. S. Hanninen, M. Lehtonen, E. Antila, "A method for detection and location of high resistance earth faults", International conference on energy management and power delivery (EMPD'98), Singapore, Proceedings IEEE catalogue no. 98EX137, pp. 495-500, 1988.
  5. D. Dalasta, B. G. Bailey, and N. Peach, "Ground fault protection", Proceedings IEEE Industry and General Applications Group, Industrial and commercial Power Systems conf., pp. 111-129, 1971.
  6. B. Bridger, "High‐resistance grounding". IEEE Transactions on Industry Applications, vol. IA‐ 19, no. 1, pp. 15-21, 1983. https://doi.org/10.1109/TIA.1983.4504149
  7. Giuseppe Parise, "A summary of IEC protection against electric shock", IEEE Transactions on industry applications, vol. 34, no. 5, pp. 911-922, 1998. https://doi.org/10.1109/28.720429