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The Selection of Neutral Grounding Method for Stationary Medium Voltage Power Supply System in Nuclear Power Plant

  • Jing Kong
  • Qi Zhang
  • Da-Hu Liu
  • Peng Liu
  • Yan Feng
  • Zi-Xi Chen
Conference paper
  • 564 Downloads
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 455)

Abstract

The rational choice of the neutral-point grounding mode of the medium-voltage system directly influences the reliable operation of the nuclear power plant. The selection of neutral-point grounding mode shall ensure the reliability of power supply and limit the over-voltage, and take into account the influence of system voltage, insulation level, communication, grounding protection and other aspects. Compared with thermal power plants, the preliminary design and protection configuration of the NPP neutral-point grounding mode of the medium-voltage system is similar, but nuclear power plants require higher reliability and safety. At present, the neutral-point grounding mode is different in CPR1000, EPR and AP1000 nuclear power plants. In this paper, the neutral grounding method and its selection basis of the medium voltage system of the NPP are introduced, and the calculation method of the ground fault capacitive current in the different operating modes is proposed, and the proposal to deal with the excessive ground-fault capacitive current is put forward.

Keywords

Nuclear power plant Neutral-point grounding Single-phase grounding fault Over-voltage 

References

  1. 1.
    NB/T20051: Nuclear Power Plant Power System Design Guidelines. Beijing: Atomic Energy Press (2011)Google Scholar
  2. 2.
    Ge, D.F.: Electrical design manual for electric power engineering (electric primary part). China Electric Power Press, BeijingGoogle Scholar
  3. 3.
    GB 50064: AC electrical installations over-voltage protection and insulation coordination design (2014)Google Scholar
  4. 4.
    Yang, S.: Nuclear power plant study on ground fault capacitance current of the ungrounded power system. Nucl. Power Eng. (2014)Google Scholar
  5. 5.
    Fei, Y.Y.: Study on neutral grounding modes of medium voltage power supply system in a domestic nuclear power plant. Technol. Exch. (2014)Google Scholar
  6. 6.
    Xiao, M.N.: Analysis and application of neutral grounding method of auxiliary power system in nuclear power plant. Electr. Worlds (2015)Google Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  • Jing Kong
    • 1
  • Qi Zhang
    • 1
  • Da-Hu Liu
    • 1
  • Peng Liu
    • 1
  • Yan Feng
    • 1
  • Zi-Xi Chen
    • 1
  1. 1.Nuclear and Radiation Safety CenterBeijingChina

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