Study on Accumulation and Dissipation of Surface Charges of Insulating Materials under Uneven DC Field

被引：0
|
作者：
Xie Q. [1 ]
Zhang C. [1 ]
Yan J. [1 ]
Ren J. [1 ]
Lü F. [1 ]
机构：
[1] State Key Laboratory of Alternate Electrical Power System with Renewable Energy Source, North China Electric Power University, Baoding
来源：
Diangong Jishu Xuebao/Transactions of China Electrotechnical Society | 2019年 / 34卷 / 04期
关键词：
Bipolar accumulation; DC; Dissipation; Finger electrode; Surface charge;
D O I：
10.19595/j.cnki.1000-6753.tces.180914
中图分类号：
学科分类号：
摘要：
In recent years, HVDC transmission has developed rapidly. However, the problems caused by the phenomenon of surface charge accumulation have become increasingly prominent, which has seriously restricted the further development of high-voltage electrical equipment. In this paper, under the inhomogeneous electric field, the surface charge accumulation characteristics of four kinds of polymer dielectric, such as epoxy resin, silicone rubber, polymethylmethacrylate and polytetrafluoroethylene, were studied by means of planar finger electrode charging. The effects of material, voltage action time and amplitude on the surface charge accumulation were investigated. In addition, the surface charge decay rules of the four materials were studied, and the correlation between charge dissipation rate and accumulation ability was analyzed. The results show that for the planar finger electrodes, the surface charge exhibits bipolar accumulation, that is, the positive side accumulates positive charge, and the negative side accumulates negative charge; on both sides of the electrode, the surface charge accumulation ability of insulating material is different. It is also found that when the charge dissipation rate is high, its surface charge accumulation ability near the ground electrode is also strong. The results will help to provide scientific basis for the insulation problem and optimization design of electrical equipment. © 2019, Electrical Technology Press Co. Ltd. All right reserved.
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页码：817 / 830
页数：13
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