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A Study on Fault Current Calculation of ±750[V] DC Distribution Grid

±750[V] 직류배전망의 고장전류 산정에 관한 연구

  • Lee, Kyung-Min (Dept. of Electrical Engineering, Gangneung-Wonju National University) ;
  • Park, Chul-Won (Dept. of Electrical Engineering, Gangneung-Wonju National University)
  • Received : 2018.04.12
  • Accepted : 2018.09.12
  • Published : 2018.10.01

Abstract

In recent years, the proliferation of DER (distributed energy resources) is progressing rapidly. In particular, research on LVDC distribution grid with various advantages has begun. In order to commercialize this LVDC grid, direct current protection method should be established by analysis of DC faults. Recently, the development of HSCB (high-speed circuit breaker) for new ${\pm}750[V]$ LVDC grid has been researched. This paper deals with the calculation of the maximum short-circuit fault current of the HSCB as a part of the development of HSCB for the LVDC distribution grid. First, modeling using PSCAD was carried out for PV array with BESS on the Gochang Power Test Center system. Next, to calculate the rated capacity of HSCB, fault currents were calculated and the characteristics were analyzed through fault simulations. Thus, this study results can help to establish short-circuit capacity calculation of HSCB and protection plan for DC protection relay system.

Keywords

References

  1. K.M. Lee, C.W Park et al., "Fault Current Calculation for Low Voltage DC Distribution Protection", 2017 KIEE PES autumn conference, pp. 539-540, 2017. 11.
  2. D.J. Lee, I.B. Kim, N.H. Park, B.I. Kim, Y.B. Lee, "DC Distribution Application K-MEG Open Test Bed Construction", Korea Energy Technology Evaluation Institute, Final report, pp. 1-144, 2014. 10.
  3. J.H. Lee, H.D, Jung, J.M. Lee, J.Y. Kim, J.T. Cho, "DC distribution development status and plan of KEPCO for introduction of high-efficiency distribution networks in the future", 2016 KIEE Summer Conference, pp. 313-314, 2016. 7.
  4. J.C. Hwang, "Modeling of Full Speed Wind-Diesel-Bess-PV Hybrid Generation Systems", CNU Master Thesis, pp. 1-82, 2013. 2.
  5. J.H. Ryu, "A Voltage-Controlled Over-Current Relaying Algorithm for Distributed generators Producing Variable Outputs", Myongji Univ. Master Thesis, pp. 1-33, 2017. 2.
  6. J. M. Ahn, J. C. Jeon et al., "Analysis on the Short Circuit Current of a Low Voltage Direct Current(DC) Distribution System using PSCAD/EMTDC", Trans. KIEE, Vol. P59, No. 4, pp. 473-476, 2010. 12.
  7. H. Akagi, E.H. Watanabe, M. Aredes, "Instantaneous Power Theory and Applications to Power Conditioning", IEEE Press A John Wiley & Sons, INC. Publication, pp. 1-379, 2007.
  8. Jin Yang, "Short-Circuit and Grounding Fault Analyses and Location in VSC-Based DC Network Cables", IEEE Trans. on Industrial Electronics, Vol. 59, No. 10, pp. 3827-3837, 2012. 10. https://doi.org/10.1109/TIE.2011.2162712
  9. Jin Yang, "Fault Analysis and Protection for Wind Power Generation Systems", Ph.D's Thesis, pp. 1-194, 2011. 3.
  10. IEC 61660-1, "Short-Circuit Currents in DC Auxiliary Installations in Power Plants and Substations - Part l : Calculation of short circuit currents", pp. 165-224, 1997.
  11. M.M.Xu et al., "A Prony-based Method of Locating Short-Circuit Fault in DC Distribution System", 2nd IET Renewable Power Generation Conference, pp. 1-4, 2013.
  12. Ali Hooshyar, Reza Iravani, "Microgrid Protection", Proceedings of the IEEE, Vol. 105, No. 7, pp. 1332-1352, July 2017. https://doi.org/10.1109/JPROC.2017.2669342
  13. T.P. An et al., "Development of high-speed circuit breakers for low-voltage DC distribution system", Service proposal, pp. 1-160, 2016. 06.
  14. K.M. LEE, "A Study on Modeling and Fault Analysis of Low Voltage Direct Current Grid", GWNU Master Thesis, pp. 1-52, 2017. 8.
  15. PSCAD User's Guide", January, pp. 1-160, 2003.
  16. K.M. Lee, C.W Park et al., "Performance Verification of the Interconnection Distribution System by PV and BESS", KIEE Electrical Machinery and Energy Conversion Systems, Spring Conference, pp. 152-154, 2018. 4.