Abstract
In this study, experiments and theoretical analyses were performed on the partial discharge initiation voltage of the electrode–bound void according to various electrode materials, including the semi-conductive rubber in the joint box of the high voltage power cable. Electrode–bound void specimens using Brass, Al, Cu, SUS and EPDM semiconducting rubber were prepared, and PDIV (partial discharge inception voltage) was measured and analyzed at 25, 60 and 90 °C. As a result, it was found that the PDIV of the electrode–bound void is dependent on the work function of the electrode. It was possible to interpret the measurement results through the calculation of the discharge voltage using Paschen’s law in combination with the thermionic emission of the electrode and thermal expansion of materials. In addition, in the case of the EPDM semiconducting rubber electrode, it was analyzed that the measured PDIV was lower than the calculated value because the void thickness was reduced due to elasticity.
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Yoon, S., Son, H., Kim, J. et al. Characteristics of Partial Discharge Inception Voltage for Electrode-Bound Voids According to Electrode Materials. J. Electr. Eng. Technol. 18, 3083–3090 (2023). https://doi.org/10.1007/s42835-022-01361-3
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DOI: https://doi.org/10.1007/s42835-022-01361-3