Abstract In order to make full use of the ESDD test data on-site bell insulators evaluate area pollution level, a new calculation method insulator double-shed contamination ratio is proposed, which based on principle minimizing misjudgment level. Natural was carried out in Taizhou, Zhejiang province, and calculated data. According probability distribution model data, 10,000 sample are randomly ...

DOI: 10.5281/zenodo.60115 ABSTRACT In order to improve the reliability of power transmission lines, one of the key issues is to reduce the hazard of contamination flashovers. At the present time, the most efficient way is to clean (or replace) the heavily polluted insulators. This study laboratory based tests were carried out on the model under ac voltage at different pollution levels. A new mo...

The outdoor insulators in service are exposed to marine, agricultural waste and industrial pollution. These pollutants get deposited on the insulator surface lead flashovers under fog conditions. There has been an abnormal increase pollution levels due rapid industrialization past two decades. This exponential causes frequent of insulators, leading tripping transmission lines consecutively may ...

Silicone rubber insulators are replacing the conventional ceramic and porcelain insulators rapidly in power transmission and distribution industry. Very limited field knowledge is available about the performance of silicone rubber insulators in polluted and contaminated environments and therefore need further investigation. A comprehensive analysis of silicone rubber sheets (intended for coatin...

The performances of outdoor polymeric insulators are influenced by environmental conditions. The use of polymeric materials in a particular composition can be produced insulators that are resistant to environmental influences. This paper presents the effect of artificial tropical climate on the hydrophobicity, equivalent salt deposit density (ESDD), surface leakage current, flashover voltage, a...

This paper introduces a new geometry for the study of dry band formation. Firstly, thermoelectric simulation 69 kV uniformly polluted composite insulator was performed. The results obtained show that thermal stress is greater at rod surface where current density maximum. In order to experimentally reproduce constriction lines on surface, which cause formation, development simple geometric setup...

Anti-pollution flashover of insulator is important for power systems. In recent years, haze-fog weather occurs frequently, which makes discharge occurs easily on the insulator surface and accelerates insulation aging of insulator. In order to study the influence of haze-fog on the surface discharge of room temperature vulcanized silicone rubber, an artificial haze-fog lab was established. Based...