纳秒脉冲电压同轴电场下有机玻璃和尼龙的闪络特性
Flashover properties of polymethyl methacrylate and nylon in coaxial electric field under nanosecond pulse voltage
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摘要: 利用基于SOS的SPG200高压脉冲功率装置研究了有机玻璃(PMMA)和尼龙1010在变压器油中的闪络特性。研究结果表明：闪络电压随内电极直径增加近似指数增加，随闪络距离延长近似线性增加，相应的击穿时延也近似线性增加。受实验条件的影响，有机玻璃和尼龙1010的闪络性能略有差异。同轴径向电场降落集中在内电极表面附近一定径向距离内，同轴电场下的闪络电压主要由内电极表面电场与径向电场分布的均匀程度决定。增加内电极直径和延长闪络距离都可以提高闪络电压，而增加内电极直径的效果更显著。Abstract: It is executed to study flashover properties of polymethyl methacrylate and nylon 1010 in transformer oil in coaxial electric field by means of high voltage pulsed power supply SPG200 based on SOS switch. Flashover voltage of both solid dielectrics almost increases according to exponent following the linear growing inner electrode diameter, so do flashover voltage as well as flashover time lag versus flashover length almost linearly. polymethyl methacrylate doesn’t take on higher flashover voltage than nylon 1010 in the experimental condition. Radial stress in coaxial electrodes focuses in the vicinity of inner electrode surface, as a result, flashover voltage under coaxial electric field depends on the electric intensity on the inner electrode surface and uniformity degree of radial elec
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Key words:
- flashover properties /
- nanosecond pulse /
- coaxial electrodes /
- polymethyl methacrylate /
- nylon
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