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Infrared temperature measurement plays an important role in the live detection of UHV arrester with its advantages of high efficiency and accuracy. However, the surface temperature of arrester will be affected by wind speed, sunlight and other external factors, which brings certain difficulties to infrared temperature measurement and fault diagnosis. Based on the principle of finite element, this paper established a three-dimensional temperature field simulation model of UHV AC arrester coupled with thermoelectricity, so as to use the model to simulate and analyze the temperature distribution of arrester under the influence of different wind speed and sunlight. The results show that the increase of wind speed strengthens the air convection and heat dissipation, which makes the maximum surface temperature decrease and the temperature rise decrease due to the internal defect heating of the arrester; the surface temperature of the arrester increases with the increase of solar radiation intensity, and the temperature of the sunny side is higher than that of the back, but the change of temperature rise is not great. The conclusion can be used as a reference for infrared temperature measurement of arrester in nonideal environment.

Study on the Temperature Distribution of UHV Arrester Considering the Influence of Wind Speed and Sunlight