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Correlation Characteristics Comparison of SF 6 Decomposition versus Gas Pressure under Negative DC Partial Discharge Initiated by Two Typical Defects

Author

Listed:
  • Dong Yang

    (School of Electrical Engineering, Wuhan University, Wuhan 430072, China)

  • Ju Tang

    (School of Electrical Engineering, Wuhan University, Wuhan 430072, China)

  • Xu Yang

    (School of Electrical Engineering, Wuhan University, Wuhan 430072, China)

  • Ke Li

    (School of Electrical Engineering, Wuhan University, Wuhan 430072, China)

  • Fuping Zeng

    (School of Electrical Engineering, Wuhan University, Wuhan 430072, China)

  • Qiang Yao

    (Electric Power Research Institute, Chongqing Power Company, Chongqing 401123, China)

  • Yulong Miao

    (Electric Power Research Institute, Chongqing Power Company, Chongqing 401123, China)

  • Lincong Chen

    (Electric Power Research Institute, Hainan Power Grid Co., Ltd. Haikou 570100, China)

Abstract

Aimed to clarify the correlation characteristics between the internal partial discharge (PD) in negative direct current (DC) gas insulated system (GIS) and gas pressure initiated by two typical defects (i.e., free-metal particles and metal protrusion), this study on PD decomposition of sulfur hexafluoride (SF 6 ) was investigated under different pressures on the basis of constructing a SF 6 decomposition experimental platform with DC PD. Free-metal particles and metal protrusion in a GIS were simulated using a spherical-bowl electrode and a needle-plate electrode, respectively. Trends and differences in the performance of SF 6 decomposition components SOF 2 , SO 2 F 2 , CO 2, and SO 2 at different pressures were compared and analyzed by experiments under different defects. Based on gas microscopic ionization theory, the relationship between the decomposition component and gas pressure was deduced and verified. The concentrations of different decomposition components were found to vary with the change in gas pressure under different defects, whereas the characteristic ratios of decomposition components versus gas pressure showed a similar trend.

Suggested Citation

  • Dong Yang & Ju Tang & Xu Yang & Ke Li & Fuping Zeng & Qiang Yao & Yulong Miao & Lincong Chen, 2017. "Correlation Characteristics Comparison of SF 6 Decomposition versus Gas Pressure under Negative DC Partial Discharge Initiated by Two Typical Defects," Energies, MDPI, vol. 10(8), pages 1-12, July.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:8:p:1085-:d:105783
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    Cited by:

    1. Gaoyang Li & Xiaohua Wang & Aijun Yang & Mingzhe Rong & Kang Yang, 2017. "Failure Prognosis of High Voltage Circuit Breakers with Temporal Latent Dirichlet Allocation," Energies, MDPI, vol. 10(11), pages 1-20, November.

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