Experimental and Simulation Research on Transient Temperature Distribution of Product-level Oil-Immersed Transformer Winding

The temperature rising and hotspots distribution of transformer winding are essential to the safe operation and service life of transformers. Transformer manufacturers and transportation inspection departments want to obtain and monitor the winding temperature rising, hotspot temperature and distribution, and predict the healthy operation of transformers in advance. In this paper, by establishing a simulation model of a product-level oil-immersed transformer winding, the transient temperature rising of the winding is simulated to predict the transient temperature distribution and hotspots. Compared with the experimental results, the results are basically consistent, but there are still small error. This paper analyzes the error, and has accumulated some experience for the accurate simulation of the transient temperature rising and hotspots of the oil-immersed transformer winding and the prevention of local overheating.