Abstract
Zinc oxide arresters have been widely used in high-voltage, ultra-high-voltage and ultra-high-voltage power transmission systems due to their excellent non-linear characteristics. However, because there is no gap between the arrester itself, there is a slight leakage current when the zinc oxide arrester is subjected to normal line voltage, which causes the aging of the zinc oxide resistance valve. The degree of aging and the rate of temperature rise are related to the temperature distribution, so it is of great significance to study the temperature field distribution of the DC arrester. This paper takes multi-column zinc oxide arrester as an example. According to the differential equation of heat transfer and the auxiliary equation, the simulation of time-varying temperature field is carried out. The simulation results are helpful to optimize the structure of multi-column parallel arrester and analyze the aging characteristics of valve.
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