Journal of Electrical and Electronic Engineering

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Analysis of Short Circuit Fault for 4.6GHz/6MW LHCD High Voltage Power Supply

Received: 25 May 2017    Accepted: 03 June 2017    Published: 17 July 2017
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Abstract

4.6GHz/6MW Lower Hybrid Current Drive (LHCD) is one of plasma current heating methods for Experimental Advanced Superconducting Tokamak (EAST). High Voltage Power Supply (HVPS) is the power supply subsystem of 4.6GHz/6MW LHCD system, which was designed, built and accepted successfully by Chinese National Development and Reform Commission in 2015. Then the new system has been in use for the 2015 EAST campaign. This paper presents the structure of 4.6GHz/6MW LHCD-HVPS and its transient operation state when its klystron load has short circuit fault. In order to protect the klystron and HVPS itself, the short-circuit fault and its transient process are analyzed and calculated in detail. And a three-electrode gas switch has been built to eliminate the short-circuit fault in microseconds. In addition, the effectiveness of the three-electrode gas switch has been verified by simulation and experiment result. The HVPS has been used in 4.6GHz/6MW LHCD system and it has good performance for the entire 2015 EAST campaign.

DOI 10.11648/j.jeee.20170504.12
Published in Journal of Electrical and Electronic Engineering (Volume 5, Issue 4, August 2017)
Page(s) 116-122
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2024. Published by Science Publishing Group

Keywords

Lower Hybrid Current Drive, High Voltage Power Supply, Pulse Step Modulation, Three-Electrode Gas Switch, Short Circuit Fault

References
[1] Y. X. Wan, P. D. Weng, J. G. Li, D. M. Gao, S. T. Wu, and EAST Team. In Progress of the EAST Project in China [C]. 21th International Atomic Energy Agency (IAEA) Fusion Energy Conference, 2004, FT/3-3: 1-8.
[2] Chengyao Peng, Jiafang Shan, et al.. Design of temperature compensating unit for the circulator in 6 MW 4.6 GHz LHCD system [J]. Fusion Engineering and Design, 2016, (112): 198-203.
[3] J. Hillairet, J. Kim, N. Faure, et al.. Design and tests of 500 kW RF windows for the ITER LHCD system [J]. Fusion Engineering and Design, 2015, (94): 22-30.
[4] Francesco Mirizzi. Prolegomena to the RAMI analysis of a conceptual LHCD system for DEMO [J]. Fusion Engineering and Design, 2013, (88): 887-890.
[5] Jun Li, Fukun Liu. Electromagnetic disruption analysis of 2.45 GHz LHW antenna in EAST under different plasma configurations [J]. Fusion Engineering and Design, 2011 (86): 214-219.
[6] Zhigang Yang, Peng Fu, et al.. Analysis of anti-short circuit strength on windings for ITER-PPEN power transformer [J]. Fusion Engineering and Design, 2017, (121): 108-113.
[7] Yiyun. Huang. Reconstruction of -35 kV/200 kW HVPS for test of klystron units in LHCD system [J]. Plasma Science and Technology, 2004, (6): 2224-2227.
[8] Yiyun. Huang. Design and experimental results of feedback control of Ohmic-heating transformer magnetic flux by LHCD power in HT-7 Tokamak [J]. Fusion Engineering and Design , 2006, (81): 2085-2091.
[9] Xu Hao, Yi Yun Huang. The design of high voltage DC power supply of 4.6GHz/500MW LHCD [J]. Applied Mechanics and Materials [J]. 2011, (135): 1027-1036.
[10] Srinivas YSS, Kushwah M, Kulkarni SV, et al.. Results of 10-Joule wire-burn test performed on 70 kV rail-gap crowbar protection system for high power klystrons and gyrotron [C]. 19th Symposium on Fusion Engineering, 2002: 91-94.
[11] Y. Y. Huang, B. H. Liu, W. H. Xu, G. L. Kuang. The Pulse High voltage Power Supply with Star point Modulator and the Mathematics Analysis Simulation [J]. High Voltage Engineering, 2000, (26): 28-30.
[12] William H. Hayt, Jr et al.. engineering electromagnetics (Seventh Edition) [M]. The McGraw-Hill Companies, Inc., 2006.
[13] A. Budak. Circuit theory fundamentals and applications [M]. Prentice-Hall, Inc., 1978.
Author Information
  • Department of Power Supply and Control Engineering, Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China; Science Island Branch of Graduate School, University of Science and Technology of China, Hefei, China

  • Department of Power Supply and Control Engineering, Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China; Science Island Branch of Graduate School, University of Science and Technology of China, Hefei, China

  • Department of Power Supply and Control Engineering, Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China

  • Department of Power Supply and Control Engineering, Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China

  • Department of Power Supply and Control Engineering, Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China

  • Department of Power Supply and Control Engineering, Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China

  • Department of Power Supply and Control Engineering, Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China

  • Department of Power Supply and Control Engineering, Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China

Cite This Article
  • APA Style

    Zhigang Yang, Peng Fu, Fei Guo, Haozhang Sun, Jian Zhang, et al. (2017). Analysis of Short Circuit Fault for 4.6GHz/6MW LHCD High Voltage Power Supply. Journal of Electrical and Electronic Engineering, 5(4), 116-122. https://doi.org/10.11648/j.jeee.20170504.12

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    ACS Style

    Zhigang Yang; Peng Fu; Fei Guo; Haozhang Sun; Jian Zhang, et al. Analysis of Short Circuit Fault for 4.6GHz/6MW LHCD High Voltage Power Supply. J. Electr. Electron. Eng. 2017, 5(4), 116-122. doi: 10.11648/j.jeee.20170504.12

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    AMA Style

    Zhigang Yang, Peng Fu, Fei Guo, Haozhang Sun, Jian Zhang, et al. Analysis of Short Circuit Fault for 4.6GHz/6MW LHCD High Voltage Power Supply. J Electr Electron Eng. 2017;5(4):116-122. doi: 10.11648/j.jeee.20170504.12

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  • @article{10.11648/j.jeee.20170504.12,
      author = {Zhigang Yang and Peng Fu and Fei Guo and Haozhang Sun and Jian Zhang and Mao Wang and Fukun Liu and Yiyun Huang},
      title = {Analysis of Short Circuit Fault for 4.6GHz/6MW LHCD High Voltage Power Supply},
      journal = {Journal of Electrical and Electronic Engineering},
      volume = {5},
      number = {4},
      pages = {116-122},
      doi = {10.11648/j.jeee.20170504.12},
      url = {https://doi.org/10.11648/j.jeee.20170504.12},
      eprint = {https://download.sciencepg.com/pdf/10.11648.j.jeee.20170504.12},
      abstract = {4.6GHz/6MW Lower Hybrid Current Drive (LHCD) is one of plasma current heating methods for Experimental Advanced Superconducting Tokamak (EAST). High Voltage Power Supply (HVPS) is the power supply subsystem of 4.6GHz/6MW LHCD system, which was designed, built and accepted successfully by Chinese National Development and Reform Commission in 2015. Then the new system has been in use for the 2015 EAST campaign. This paper presents the structure of 4.6GHz/6MW LHCD-HVPS and its transient operation state when its klystron load has short circuit fault. In order to protect the klystron and HVPS itself, the short-circuit fault and its transient process are analyzed and calculated in detail. And a three-electrode gas switch has been built to eliminate the short-circuit fault in microseconds. In addition, the effectiveness of the three-electrode gas switch has been verified by simulation and experiment result. The HVPS has been used in 4.6GHz/6MW LHCD system and it has good performance for the entire 2015 EAST campaign.},
     year = {2017}
    }
    

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  • TY  - JOUR
    T1  - Analysis of Short Circuit Fault for 4.6GHz/6MW LHCD High Voltage Power Supply
    AU  - Zhigang Yang
    AU  - Peng Fu
    AU  - Fei Guo
    AU  - Haozhang Sun
    AU  - Jian Zhang
    AU  - Mao Wang
    AU  - Fukun Liu
    AU  - Yiyun Huang
    Y1  - 2017/07/17
    PY  - 2017
    N1  - https://doi.org/10.11648/j.jeee.20170504.12
    DO  - 10.11648/j.jeee.20170504.12
    T2  - Journal of Electrical and Electronic Engineering
    JF  - Journal of Electrical and Electronic Engineering
    JO  - Journal of Electrical and Electronic Engineering
    SP  - 116
    EP  - 122
    PB  - Science Publishing Group
    SN  - 2329-1605
    UR  - https://doi.org/10.11648/j.jeee.20170504.12
    AB  - 4.6GHz/6MW Lower Hybrid Current Drive (LHCD) is one of plasma current heating methods for Experimental Advanced Superconducting Tokamak (EAST). High Voltage Power Supply (HVPS) is the power supply subsystem of 4.6GHz/6MW LHCD system, which was designed, built and accepted successfully by Chinese National Development and Reform Commission in 2015. Then the new system has been in use for the 2015 EAST campaign. This paper presents the structure of 4.6GHz/6MW LHCD-HVPS and its transient operation state when its klystron load has short circuit fault. In order to protect the klystron and HVPS itself, the short-circuit fault and its transient process are analyzed and calculated in detail. And a three-electrode gas switch has been built to eliminate the short-circuit fault in microseconds. In addition, the effectiveness of the three-electrode gas switch has been verified by simulation and experiment result. The HVPS has been used in 4.6GHz/6MW LHCD system and it has good performance for the entire 2015 EAST campaign.
    VL  - 5
    IS  - 4
    ER  - 

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