Study on Electric Field Variety of Composite Insulator with a Variable Micro-gap
For the composite insulator in the long run or technology and other reasons may exist micro gap,and the micro gap will make the local electric field distortion,so that the micro gap ionization occurs,further for the possible development of partial discharge,when the discharge occurs between the mandrel and the hardware fittings will directly reduce mechanical properties,then make corrosion and crack thereby causing a major blackout.This article on the composite insulator umbrella skirt micro gap exists on electric field to undertake preliminary discuss.The results showed that: the micro gap existence makes the local field intensity distribution which is seriously distort,and have influence on the strong values where is in the hardware fittings,as the gap increases,its local distortion amplitude is bigger,at the same time have a greater impact on the internal field of micro-gap near the sheds.While the micro gap exists or not,the umbrella skirt on the electric potential and electric field distribution is not so obvious.
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