Research on a degradation diagnosis technology for porcelain insulators using infrared thermography
The degradation of porcelain insulators poses a significant threat to the safe and stable operation of transmission lines. How to timely and effectively diagnose degraded insulators becomes a key technical challenge in the power industry. Based on the equivalent circuit model of the insulators and t...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
zhejiang electric power
2025-01-01
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| Series: | Zhejiang dianli |
| Subjects: | |
| Online Access: | https://zjdl.cbpt.cnki.net/WKE3/WebPublication/paperDigest.aspx?paperID=6b5aad1c-f4fb-4958-948a-bab5ede36fe9 |
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| Summary: | The degradation of porcelain insulators poses a significant threat to the safe and stable operation of transmission lines. How to timely and effectively diagnose degraded insulators becomes a key technical challenge in the power industry. Based on the equivalent circuit model of the insulators and temperature rise calculation equations， a simulation analysis is conducted to study the temperature rise patterns of insulators. Temperature discretization is calculated regionally， and temperature thresholds are set to efficiently diagnose the degraded insulators. Simulation and test results indicate that the temperature discretization varies across different regions of the insulator； the temperature rise of any insulator in strings initially increases and then decreases with a reduction in its internal resistance； and the temperature rise caused by degradation at the ends is greater than that at the intermediate voltage end. Through the changes in their temperature and neighboring insulators caused by changes in resistance， degraded insulators can be identified. |
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| ISSN: | 1007-1881 |