Defect Identification Method Based on Casing Internal Temperature Variation

Bushing is an important component of transformers, mainly serving as insulation and mechanical support. Its operating status is of great significance for the normal operation of transformers. This paper judges whether the defect identification method based on the temperature change inside the bushing is feasible by analyzing the temperature change inside the transformer oil paper bushing, the temperature field distribution of the bushing, the influence of the temperature distribution of the bushing conductive rod, and the temperature field distribution of the insulating oil under different defects. The analysis result has reference significance for the safe operation of the oil-paper capacitor bushing.