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Article

A Comparison of Partial Discharge Sensors for Natural Gas Insulated High Voltage Equipment

Advanced High Voltage Engineering Research Centre, School of Engineering, Cardiff University, Cardiff CF24 3AA, UK
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Sensors 2020, 20(16), 4443; https://doi.org/10.3390/s20164443
Received: 14 May 2020 / Revised: 21 July 2020 / Accepted: 7 August 2020 / Published: 9 August 2020
The research in this paper consists of practical experimentation on a gas insulated section of high voltage equipment filled with carbon dioxide and technical air as a direct replacement to sulphur hexafluoride (SF6) and analyses the results of PD measurement by way of internal UHF sensors and external HFCTs. The results contribute to ongoing efforts to replace the global warming gas SF6 with an alternative such as pure carbon dioxide or technical air and are applicable to mixtures of electronegative gases that have a high content of buffer gas including carbon dioxide. The experiments undertaken involved filling a full-scale gas insulated line demonstrator with different pressures of CO2 or technical air and applying voltages up to 242 kV in both clean conditions and particle contaminated conditions. The results show that carbon dioxide and technical air can insulate a gas section normally insulated with SF6 at phase-to-earth voltage of 242 kV and that both HFCT and UHF sensors can be used to detect partial discharge with natural gases. The internal UHF sensors show the most accurate PD location results but external HFCTs offer a good compromise and very similar location accuracy. View Full-Text
Keywords: gas insulated transmission lines (GIL); partial discharge (PD); sulphur hexafluoride (SF6); carbon dioxide (CO2); technical air; ultra high frequency (UHF) sensors; high frequency current transformer (HFCT) gas insulated transmission lines (GIL); partial discharge (PD); sulphur hexafluoride (SF6); carbon dioxide (CO2); technical air; ultra high frequency (UHF) sensors; high frequency current transformer (HFCT)
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MDPI and ACS Style

Widger, P.; Carr, D.; Hills, M.; Reid, A. A Comparison of Partial Discharge Sensors for Natural Gas Insulated High Voltage Equipment. Sensors 2020, 20, 4443. https://doi.org/10.3390/s20164443

AMA Style

Widger P, Carr D, Hills M, Reid A. A Comparison of Partial Discharge Sensors for Natural Gas Insulated High Voltage Equipment. Sensors. 2020; 20(16):4443. https://doi.org/10.3390/s20164443

Chicago/Turabian Style

Widger, Phillip, Daniel Carr, Meirion Hills, and Alistair Reid. 2020. "A Comparison of Partial Discharge Sensors for Natural Gas Insulated High Voltage Equipment" Sensors 20, no. 16: 4443. https://doi.org/10.3390/s20164443

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