Surface charge accumulation of post insulator: Dominant charge transition under different conditions

An insulator surface charge may be responsible for flashover along the surface. In this study, experimental investigations of post are performed using a variety voltage, gas type, and pressure conditions. Combining model transport, dominant transition is revealed considering partial discharge. The results show that hetero-polar accumulates near high voltage electrodes on at one atmospheric with an applied DC ranging from −10 to −60 kV. area ratio increases 23% 53%. It also generates reversed polarity charges. Under −20 kV, grounded electrode gradually becomes homo-polar charges decrease SF6 in 0.5 MPa SF6/N2 mixtures. case, most pathway accumulation through insulation rather than insulator. For 20%SF6/80%N2 mixtures, speckles appear plate when mixtures decreases 0.1 MPa. This means discharge occurs side under lower pressure. Refer presenting findings, insulators provided as important reference.