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Experimental Investigation on Propagation Characteristics of PD Radiated UHF Signal in Actual 252 kV GIS

Author

Listed:
  • Tianhui Li

    (State Grid Hebei Electric Power Research Institute, Shijiazhuang 050021, China)

  • Mingzhe Rong

    (State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China)

  • Xiaohua Wang

    (State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China)

  • Jin Pan

    (State Grid Hebei Electric Power Research Institute, Shijiazhuang 050021, China)

Abstract

For partial discharge (PD) diagnostics in gas insulated switchgears (GISs) based on the ultra-high-frequency (UHF) method, it is essential to study the attenuation characteristics of UHF signals so as to improve the application of the UHF technique. Currently, the performance of UHF has not been adequately considered in most experimental research, while the constructive conclusions about the installation and position of UHF sensors are relatively rare. In this research, by using a previously-designed broadband sensor, the output signal is detected and analyzed experimentally in a 252 kV GIS with L-shaped structure and disconnecting switch. Since the relative position of the sensor and the defect is usually fixed by prior research, three circumferential angle positions of the defect in cross section are performed. The results are studied by time, statistics and frequency analyses. This identifies that the discontinuity conductor of DS will lead to a rise of both the peak to peak value ( Vpp ) and the transmission rate of the UHF signal. Then, the frequency analysis indicates that the reason for the distinction of signal amplitude and transmission rate is that the mode components of the PD signal are distinctively affected by the special structure of GIS. Finally, the optimal circumferential angle position of the UHF Sensor is given based on the comparison of transmission rates.

Suggested Citation

  • Tianhui Li & Mingzhe Rong & Xiaohua Wang & Jin Pan, 2017. "Experimental Investigation on Propagation Characteristics of PD Radiated UHF Signal in Actual 252 kV GIS," Energies, MDPI, vol. 10(7), pages 1-12, July.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:7:p:942-:d:103968
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    References listed on IDEAS

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    1. Ju Tang & Jiabin Zhou & Xiaoxing Zhang & Fan Liu, 2012. "A Transformer Partial Discharge Measurement System Based on Fluorescent Fiber," Energies, MDPI, vol. 5(5), pages 1-13, May.
    2. Tianyan Jiang & Jian Li & Yuanbing Zheng & Caixin Sun, 2011. "Improved Bagging Algorithm for Pattern Recognition in UHF Signals of Partial Discharges," Energies, MDPI, vol. 4(7), pages 1-15, July.
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    Cited by:

    1. Łukasz Nagi & Michał Kozioł & Jarosław Zygarlicki, 2020. "Optical Radiation from an Electric Arc at Different Frequencies," Energies, MDPI, vol. 13(7), pages 1-9, April.
    2. Tianhui Li & Xianhai Pang & Boyan Jia & Yanwei Xia & Siming Zeng & Hongliang Liu & Hao Tian & Fen Lin & Dan Wang, 2020. "Detection and Diagnosis of Defect in GIS Based on X-ray Digital Imaging Technology," Energies, MDPI, vol. 13(3), pages 1-18, February.

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