The Transactions of the Korean Institute of Electrical Engineers P (전기학회논문지P)

The Korean Institute of Electrical Engineers (대한전기학회)
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Analysis for Pole to Ground Fault Detection in Ungrounded LVDC Distribution Network

비접지 LVDC 배전망의 지락고장 검출을 위한 분석

  • Park, Chul-Won (Dept. of Electrical Engineering, Gangneung-Wonju National University)
  • Received : 2018.07.23
  • Accepted : 2018.08.21
  • Published : 2018.09.01
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Abstract

Recently, LVDC distribution network and DC microgrid with many advantages are being built. However, this LVDC distribution is an IT grounded or ungrounded system, and it is difficult to detect a ground fault because the fault current is small. In this paper, we propose a signal injection method for unipolar LVDC distribution network to detect ground fault in ungrounded LVDC distribution, and various analyzes were performed for ground fault detection.

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References

  1. C. W. Park, K. M. Lee, et al, "Ground Fault Analysis of Ungrounded DC Microgrid," KIEE Summer conference, pp. 482-483, 2018. 7.
  2. J. T. Cho, "Development and implementation of DC distribution," KIIEE Spring conference, LVDC workshop, pp. 133-148, 2018. 5.
  3. T. P. An et al., "Development of high-speed circuit breakers for low-voltage DC distribution system," KEPRI Service proposal, pp. 1-160, 2016. 6.
  4. KapJin, "DC Distribution Technology Overview and Development Examples," pp. 1-59, 2016. 6.
  5. Y. S. Ko, "Examples of power conversion system design and technology development suitable for DC distribution," KapJin, pp. 1-48, 2016. 6.
  6. S. S. Shin, "Establishment and revision of LVDC distribution facility standards," KIIEE Spring conference, LVDC workshop, pp. 167-176, 2018. 5.
  7. S. Y. Chang, "LVDC distribution technology trend," KIIEE Spring conference, LVDC workshop, pp. 151-164, 2018. 5.
  8. Hyosung, "Construction of DC Grid System with Distributed Energy Resources in an island," Service plan, pp. 1-90, 2016. 4.
  9. S. J. Park, S. M. Park, J. H. Lee, "DC power distribution and DC breaker technology trend," The Korean Institute of Electrical Engineers, vol. 67, no. 7, pp. 27-33, 2015. 11.
  10. H. S. Kim, S. Y. Han, H. S. Han, "Development of DC Leakage Current Sensor for Solar Power Generation System," Trans. KIEE, vol. 63, no. 6, pp. 828-833, Jun., 2014.
  11. IEC 60364-1ed5.0, "Low voltage electrical installations," 2005.
  12. Hongjoo Kim, Youngpyo Cho, Jaehan Kim, Jintae Cho, Juyong Kim, "Demonstration of the LVDC distribution system in an island," 24th International Conference & Exhibition on Electricity Distribution (CIRED), IET Journals, pp. 2215-2218, June 2017.
  13. Bender, "ISOMETER iso1685," Manual, pp. 1-39, 2016. 12.
  14. Oliver Schaefer, Karl Schepp, "Method and Device for Monitoring the insulation of ungrounded DC and AC voltage networks," Bender, United States Patent, US9,069,025 B2, pp. 1-19, 2015. 6.
  15. ABB, "Insulation monitoring relays CM-IWN.4/5/6," Data sheet, pp. 1-20.
  16. W. S. Lee, "Selective Ground Fault Protection Algorithm For DC Traction Systems," Myongji University, Master's thesis, pp. 1-27, 2012. 2.
  17. S. H. Kim, "A Study of Leakage Detection Technology for available DC Distribution," Seoul National University of Science and Technology, Master's thesis, pp. 1-48, 2017. 8.
  18. Jae-Do Park, "Ground Fault Detection and Location for Ungrounded DC Traction Power Systems," IEEE Trans. Vechcular Technology, vol. 64, no. 12, pp. 5667-5676, 2015. 12. https://doi.org/10.1109/TVT.2015.2388785
  19. Guan Shaopeng, Nai Changxin, Sun Wenyan, Dong Lu, "Direct Current Circuit model for landfill leakage detection," The Ninth International Conference on Electronic Measurement & Instruments (ICEMI 2009), pp. 2-693-2-696.
  20. Ruijing Yang, "The Study of Locating Ground Faults in DC Microgrid Using Wavelet Transform," University of Wisconsin-Milwaukee Master thesis, pp. 1-75, August 2016.
  21. Piotr Olszowiec, "Insulation Measurement and Supervision in Live AC and DC Unearthed Systems," Second Edition, Springer, pp. 1-180, 2014.
  22. Indra Man Karmacharya, Ramakrishna Gokaraju, "Fault Location in Ungrounded Photovoltaic System Using Wavelets and ANN," IEEE Trans. Power Delivery, vol. 33, no. 2, pp. 549-559, 2018. 4. https://doi.org/10.1109/TPWRD.2017.2721903