Study on Variation Characteristics of Leakage Current of Roof Insulators under Different Operating Conditions
The pollution discharge from roof insulators poses a severe threat to the safe and stable operation of E-MUs.Leakage current serves as a comprehensive indicator of the operating state of insulators.This paper aims to study the influencing factors on the variation characteristics of leakage current in roof insulators.Firstly,an experi-mental platform for pollution tests and leakage current detection was established,and insulator samples with different degrees of pollution were prepared.Subsequently,the leakage current of roof insulators was obtained under different pollution levels,voltage ratings,and moisture conditions using a data acquisition device.Finally,the relationships between pollution degree,voltage rating,moisture condition,and leakage current were analyzed,along with their syn-ergistic effects.The results indicate a synergistic relationship between surface moisture and pollution degree,exhibi-ting a proportional effect on leakage current,with the growth rate increasing from 22.76%to 119.35%.The most severe moisture condition on the surface of the composite insulator's umbrella skirt,represented by the moisture con-tent per unit area,was approximately 16mg/cm2,corresponding to the maximum leakage current.The research find-ings have significant implications for the condition monitoring of roof insulators.
万方数据
维普
