不同污秽度下零值绝缘子串温度场仿真研究

Simulation Study on Temperature Field of Zero-Value Insulator String Under Different Pollution Degree

为研究含零值绝缘子串的温升分布特性,以双伞型瓷质绝缘子为研究对象,建立电-热-流多物理场耦合模型,分析不同污秽度、零值绝缘子位置、温度对绝缘子串温度分布的影响。仿真结果表明,正常绝缘子串的温升变化范围较小,含零值绝缘子串的温升变化范围相对较大,零值绝缘子的温度与其余正常绝缘子相比较低;清洁和干燥污秽条件下零值绝缘子串的温升较小,饱和湿润污秽条件下零值绝缘子串的温升较大,且污秽度越大,零值绝缘子的温度与其余正常绝缘子的差值越大;零值绝缘子位于绝缘子串两端时,与相邻绝缘子温度差较大,位于中间时与相邻绝缘子的温度差较小,随着污秽度的增加,零值绝缘子与相邻绝缘子的温度差有所增大。

In order to study the temperature rising distribution characteristics of zero-value insulator strings,the porcelain insulator with double-umbrella was taken as the research object,an electric-heat-flow multi-physics coupling model was established,and the effects of different contamination degrees,zero-value insulator positions and temperatures on the temperature distribution of insulator strings were analyzed.The simulation results show that the temperature rise change range of the normal insulator string is small,the temperature rise change range of the zero-value insulator string is relatively large,and the temperature of the zero-value insulator is lower than that of the other normal insulators.The temperature rise of the zero-value insulator string under clean and dry dirty conditions is small,and the temperature rise of the zero-value insulator string under saturated wet filth condition is large,and the greater the degree of contamination,the greater the difference between the temperature of the zero-value insulator and the rest of the normal insulators.When the zero-value insulator is located at both ends of the insulator string,the temperature difference with the adjacent insulator is large,and the temperature difference with the adjacent insulator is small when it is in the middle.As the degree of contamination increases,the temperature difference between the zero-value insulator and the adjacent insulator increases.