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This paper is aimed at the study of the influence of the chemical constitution of pollution on dc flashover discharge of high voltage contaminated insulators. It's shown that the type of salt and salt mixture has an influence on the critical currents for both polarities but doesn??t affect significantly the critical voltages whereas the concentration of insoluble matters (Non Soluble Density Deposit,...
Pollution distributes irregularly on the surfaces of traction power supply system insulators as high-speed trains pass through pollution aerosols. This affects the flashover characters. Insulator polluting characteristics were studied in a wind tunnel at speeds up to 100 m/s. The gas-solid aerosol flow around insulator was analyzed and a pollution accumulation model was established after analyzing...
In this work, the electric discharges activity on non-uniformly polluted glass plane insulator model is investigated for increasing applied voltage levels up to flashover. The effect of pollution severity was simulated using pollution solution containing various kaolin concentrations. The polluted sample has a strip that is dry and clean which is parallel to the electrodes planes. Configurations with...
This paper presents an interactive computer package enabling to choose insulators used in polluted conditions. This is accomplished by integrating a self consistent dynamic model we developed in previous works and that includes the successive development of the arc on insulator surface based on an equivalent electrical network model and an analytic arc propagation criterion. This package enables to...
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