中文摘要：

为深入研究聚合物介质表面电荷聚散的规律,并探索其相关机理,使用闪络及电晕的方法以实验形式对2种情况下产生的表面电荷积聚与消散问题进行了深入分析,重点对实验中出现的异号电荷积聚进行了探究,明确了实验中异号电荷来源于加压结束时已积聚电荷造成的二次放电。实验发现,连续闪络能够使得试品的闪络电压上升并在闪络3~5次后达到饱和。根据对实际实验现象的分析,提出了介质表面双极性电荷积聚观点,认为闪络后试品及高强度电晕处理会导致双极性积聚,而低强度电晕处理则产生单极性积聚。双极性积聚的电荷会在闪络发展过程中与闪络路径等离子通道中的电荷相互作用,从而影响闪络电压。

英文摘要：

In order to further study the accumulation and decay of polymer surface charge and to explore the associated mechanism, surface charge accumulation and decay are analyzed in detail under 2 different circumstances of flashover and corona charging. The appearance of opposite charges is discussed. It is clear that the opposite charge is generated in the secondary discharge which is caused by the accumulated charges during charging process. It is found that consecutive flashovers will lead to the increase of flashover voltage. And the flashover voltage saturates after 3-5 times flashovers. According to the analyses of experimental results, the viewpoint of ambipolar accumulation is proposed. It is found that flashover charging and intense corona charging will result in ambipolar accumulations. Dim corona charging will result in unipolar accumulation. Ambipolar accumulated charges can interact with the charges in the flashover plasma path during the flashover development and influence the flashover voltage.