应用模拟电荷法在线检测劣质绝缘子的研究

The Research on the Application of Simulation Charge Method in On-line Detection of Defective Insulators

根据输电线路绝缘子串的标准电压分布采用模拟电荷法计算绝缘子附近的标准电场分布 ,再依次算出绝缘子串内有一片劣质绝缘子在不同位置时的电场分布情况并求出两次电场分布的差值。由现场实测电场值与标准值比较所得差值曲线即可判别是否存在劣质绝缘子。

According to the standard distribution of the insulators in the power lines, the simulation charge method is used to calculate distribution of the electric field near the insulators, and calculate the distributions of the electric field when there is defect in the composite insulators. The difference between these two results is analyzed. The percentage of the error between the practical value of the electric field and the standard value of the electric field is calculated, according to this whether there is defect in the composite insulators can be estimated. The advantage of this method is that there is no need to step on the tower.