Investigation on combined effect of humidity–temperature on partial discharge through dielectric performance evaluation
Abstract The humidity role in the partial discharge (PD) inception mechanism is quite challenging, especially when considering the environmental temperature. Indeed, there is no general rule to explain the humidity effect on the PD phenomenon. In this paper, the PD activity in inter‐turn insulation...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2023-01-01
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| Series: | IET Science, Measurement & Technology |
| Online Access: | https://doi.org/10.1049/smt2.12128 |
| _version_ | 1797962128605315072 |
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| author | Yatai Ji Paolo Giangrande Weiduo Zhao Vincenzo Madonna He Zhang Jing Li Michael Galea |
| author_facet | Yatai Ji Paolo Giangrande Weiduo Zhao Vincenzo Madonna He Zhang Jing Li Michael Galea |
| author_sort | Yatai Ji |
| collection | DOAJ |
| description | Abstract The humidity role in the partial discharge (PD) inception mechanism is quite challenging, especially when considering the environmental temperature. Indeed, there is no general rule to explain the humidity effect on the PD phenomenon. In this paper, the PD activity in inter‐turn insulation is experimentally investigated for different relative humidity (RH) conditions at three different ambient temperatures, that is, 30°C, 60°C, and 90°C. Partial discharge inception voltage (PDIV) is directly measured through a photomultiplier tube (PMT), whereas the tip‐up tests are performed aiming at monitoring both dissipation factor (tanδ) and insulation capacitance (IC). These extra measurements (diagnostic dielectric markers) allow better assessing the insulation status. The adoption of the tip‐up test enables the insulation properties measurement. Based on the tip‐up tests’ findings, the interfacial polarization process starts at 75% RH under 60°C, while the high conductivity area is already formed at 75% RH when the ambient temperature is 90°C. The water film formation deduced from the tip‐up test is then used to explain the trend of PDIV, and the validity is further proved by finite element analysis (FEA). |
| first_indexed | 2024-04-11T01:08:27Z |
| format | Article |
| id | doaj.art-458490f949b54a8fa26f9eee394f7865 |
| institution | Directory Open Access Journal |
| issn | 1751-8822 1751-8830 |
| language | English |
| last_indexed | 2024-04-11T01:08:27Z |
| publishDate | 2023-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | IET Science, Measurement & Technology |
| spelling | doaj.art-458490f949b54a8fa26f9eee394f78652023-01-04T09:44:17ZengWileyIET Science, Measurement & Technology1751-88221751-88302023-01-01171374610.1049/smt2.12128Investigation on combined effect of humidity–temperature on partial discharge through dielectric performance evaluationYatai Ji0Paolo Giangrande1Weiduo Zhao2Vincenzo Madonna3He Zhang4Jing Li5Michael Galea6Key Laboratory of More Electric Aircraft Technology of Zhejiang Province University of Nottingham Ningbo China Ningbo ChinaDepartment of Engineering and Applied Sciences University of Bergamo Dalmine (BG) ItalyKey Laboratory of More Electric Aircraft Technology of Zhejiang Province University of Nottingham Ningbo China Ningbo ChinaAdvanced Engineering PUNCH Torino S.p.A. Turin ItalyKey Laboratory of More Electric Aircraft Technology of Zhejiang Province University of Nottingham Ningbo China Ningbo ChinaKey Laboratory of More Electric Aircraft Technology of Zhejiang Province University of Nottingham Ningbo China Ningbo ChinaDepartment of Industrial Electrical Power Conversion University of Malta Msida MaltaAbstract The humidity role in the partial discharge (PD) inception mechanism is quite challenging, especially when considering the environmental temperature. Indeed, there is no general rule to explain the humidity effect on the PD phenomenon. In this paper, the PD activity in inter‐turn insulation is experimentally investigated for different relative humidity (RH) conditions at three different ambient temperatures, that is, 30°C, 60°C, and 90°C. Partial discharge inception voltage (PDIV) is directly measured through a photomultiplier tube (PMT), whereas the tip‐up tests are performed aiming at monitoring both dissipation factor (tanδ) and insulation capacitance (IC). These extra measurements (diagnostic dielectric markers) allow better assessing the insulation status. The adoption of the tip‐up test enables the insulation properties measurement. Based on the tip‐up tests’ findings, the interfacial polarization process starts at 75% RH under 60°C, while the high conductivity area is already formed at 75% RH when the ambient temperature is 90°C. The water film formation deduced from the tip‐up test is then used to explain the trend of PDIV, and the validity is further proved by finite element analysis (FEA).https://doi.org/10.1049/smt2.12128 |
| spellingShingle | Yatai Ji Paolo Giangrande Weiduo Zhao Vincenzo Madonna He Zhang Jing Li Michael Galea Investigation on combined effect of humidity–temperature on partial discharge through dielectric performance evaluation IET Science, Measurement & Technology |
| title | Investigation on combined effect of humidity–temperature on partial discharge through dielectric performance evaluation |
| title_full | Investigation on combined effect of humidity–temperature on partial discharge through dielectric performance evaluation |
| title_fullStr | Investigation on combined effect of humidity–temperature on partial discharge through dielectric performance evaluation |
| title_full_unstemmed | Investigation on combined effect of humidity–temperature on partial discharge through dielectric performance evaluation |
| title_short | Investigation on combined effect of humidity–temperature on partial discharge through dielectric performance evaluation |
| title_sort | investigation on combined effect of humidity temperature on partial discharge through dielectric performance evaluation |
| url | https://doi.org/10.1049/smt2.12128 |
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