绝缘子有憎水性时的交流污闪模型分析

AC Pollution Flashover Model Analysis of Insulator with Hydrophobicity

为了分析外绝缘表面硅橡胶有憎水性时的交流污闪电压,根据憎水性情况下污闪的机理建立了交流污闪模型。分析了水带的截面积、水电导率、电弧数量、泄漏距离、空气中弧长、电弧参数A、n、电弧恢复条件等因素对具有憎水性绝缘子交流污闪电压的影响。结果表明,随着水带截面积和水电导率的增加闪络电压成指数规律下降,随电弧数量、泄漏距离的增加闪络电压线性增大,闪络电压与泄漏距离比值不随泄漏距离的变化而变化,随空气中弧长比例的增加闪络电压略有减少,随电弧参数A、n的增加闪络电压增大,电弧恢复条件对闪络电压有明显影响。所得结果对憎水性时污闪模型的研究具有一定的参考意义。

For analysis of AC pollution flashover voltage of insulator with hydrophobicity,an AC pollution flashover model of insulator with hydrophobicity based on pollution flashover mechanism was established. The influences of water zone sectional area,water conductivity,arc numbers,leakage distance,air arc length,arc parameters A and n and arc recovery condition on pollution flashover voltage of insulator with hydrophobicity were analyzed. The results indicate that the flashover voltage decreases exponentially with the water zone sectional area and water conductivity,the flashover voltage increases linearly with the arc numbers and leakage distance,the ratio of the flashover voltage and the leakage distance has nothing to do with the leakage distance,the flashover voltage decreases slightly with the air arc length,the flashover voltage increases with the arc parameter A and n,and the arc recovery condition has an obvious effect on the flashover voltage.