Influences of Internal Void Defect Dimension and Position on Partial Discharge Characteristics in the Solid Insulation

被引：0

作者：

Zhang Q. ^{[1
]}

Han X. ^{[1
]}

Zhang Z. ^{[1
]}

Pang P. ^{[1
]}

Sun Z. ^{[1
]}

Li J. ^{[1
]}

机构：

[1] State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an

来源：

Gaodianya Jishu/High Voltage Engineering | 2019年 / 45卷 / 04期

关键词：

Artificial void; Discharge repetition rate; Inception voltage; Internal electric field intensity; Maximum discharge quantity; Partial discharge; Surface charge;

D O I：

10.13336/j.1003-6520.hve.20190329029

中图分类号：

学科分类号：

摘要：

The internal void defect is one of the typical defects of the basin insulators in gas insulated switchgear (GIS), and the change of size and position in the solid insulation will lead to the variation of the partial discharge characteristics. Therefore, taking the circular artificial void inside the epoxy plate model as the research object, we studied the characteristic variation of partial discharge in the void with different di-ameters, heights and positions, such as the inception voltage, maximum discharge quantity, and discharge repetition rate. The research results show that, the increase of void size will influence the characteristic parameters of partial discharge by changing the discharge area and the internal electric field intensity. The increase of the void diameter will decrease the partial discharge inception voltage, but increase the maximum discharge and discharge repetition rate; with the void height increasing, the inception voltage has a minimum value, while the maximum discharge quantity and discharge repetition rate have the maximum value. In addition, the change of the void position will affect the internal electric field, and then have influences on the partial discharge parameters which include the inception voltage, maximum discharge quantity, and discharge repetition rate of partial discharge. Compared with the void wrapped by an insulating medium, the inception voltage is higher when the void is in direct contact with the electrode. Partial discharge characteristic parameters and their change law can effectively reflect the stage of partial discharge development and the severity of the void defect. © 2019, High Voltage Engineering Editorial Department of CEPRI. All right reserved.

引用

页码：1313 / 1322

页数：9

共 25 条

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