A Building Block to the Design of Partial Discharge Free HV and MV Cables: Modeling Defects and Discharge Inception Voltage
It is well assessed that partial discharges, PD, are one of the major causes of MV and HV cable system breakdown, thus investigating partial discharge phenomenology and harmfulness is a key topic in relation to electric asset component reliability. Defects, which are able to generate partial dischar...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
IEEE
2025-01-01
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| Series: | IEEE Access |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/10909073/ |
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| Summary: | It is well assessed that partial discharges, PD, are one of the major causes of MV and HV cable system breakdown, thus investigating partial discharge phenomenology and harmfulness is a key topic in relation to electric asset component reliability. Defects, which are able to generate partial discharges can be ineludible in cable systems, from manufacturing to on-field assembly, but they can also be structural, as in impregnated EHV cables. Associating defect type and size with partial discharge inception voltage at the design stage could allow cable systems free of partial discharges to be designed, for given type and size of defects, at nominal voltage. This paper shows how to model successfully internal and surface defects in cables providing an accurate estimate of the PD inception voltage. Such an estimate is validated through innovative and automatic PD measurement software which can be able, automatically, to acquire and identify the type of partial discharges generated by defects, rejecting efficiently noise. |
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| ISSN: | 2169-3536 |