Operational Hazards Caused By The Lack Of Self-cleaning Ability Of Insulators

As an indispensable insulating component in power transmission lines and distribution systems, the surface condition of dead end insulators is directly related to the overall operational stability of the power system. Outdoor environmental conditions are complex, and natural factors such as pollutants, water vapor, and dust constantly act on the surface of dead end suspension insulators. When the device lacks self-cleaning ability, the accumulation of pollutants will change the surface electrical characteristics of polymer deadend insulator, thereby significantly affecting the performance of the circuit.

The Impact of Surface Contamination Accumulation on Insulation Performance

During field operation, the porcelain dead end insulators component encounters layered salt spray, dust, and organic pollutant adhesion. These contamination layers can form conductive channels under varying humidity conditions. The thicker the contamination layer, the higher the leakage current and the more uneven the surface electric field distribution, leading to increased risks of electrostatic discharge and partial discharge. Contamination accumulation can also increase the flashover risk of the suspension insulator component, potentially causing tripping or power outages under voltage stress.

Impact of Contamination on Leakage Current and Dielectric Properties

• The contamination layer forms conductive paths under humid conditions, increasing insulator leakage current.

• Surface contamination reduces the surface insulation strength of the insulator, making the device more susceptible to surface corona and discharge.

• In high humidity environments, contamination combines with water films, promoting increased dielectric losses at the insulator interface.

Increased Maintenance Costs and Operational Risks

The lack of self-cleaning capabilities means a greater reliance on the contamination status of insulators. Power maintenance departments must increase the frequency of manual cleaning or adopt mechanical cleaning methods to reduce contamination accumulation; otherwise, insulators that have not been treated for a long time will become a hidden source of system failure. Regular on-site cleaning not only consumes manpower but may also increase dispatch pressure due to power outages, increasing the overall maintenance difficulty.