[Oral Presentation]Breakdown Characteristics of the Insulating Medium in Foil-film Capacitors Under DC Superimposed Harmonic Voltage at Different Temperatures

Breakdown Characteristics of the Insulating Medium in Foil-film Capacitors Under DC Superimposed Harmonic Voltage at Different Temperatures

ID：106 Submission ID：1494 View Protection：ATTENDEE Updated Time：2020-10-15 18:47:04 Hits：271 Oral Presentation

Start Time：2020-11-03 11:15 （Asia/Shanghai）

Duration：15min

Session：[D] High Voltage and Insulation Technology » [D2] Session 14 and Session 19

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Abstract

With the increasing application of nonlinear electrical equipment in the industrial field, the harmonic content in the power grid is gradually increasing, which brings great harm to the foil-film capacitors used in the system. In order to study the breakdown characteristics of the dielectric in the foil-film capacitor under DC superimposed harmonic voltage at different temperatures, a breakdown test platform is established for the foil-film capacitor immersed in benzyl toluene and the foil-film capacitor elements are subjected to DC voltage, DC superimposed 3rd harmonic voltage, DC superimposed 5th harmonic voltage at 40℃, 55℃, 70℃ and 85℃ respectively. The results show that under the same type of voltage, the breakdown strength of the insulating medium in the foil-film capacitors decreases with the increasing temperature. Besides, in the temperature range of 40℃~85℃, the breakdown strength of the insulating medium of the foil-film capacitors decreases with the increase of the harmonic order of the harmonic voltage at the same temperature.

Keywords

breakdown characteristics; foil-film capacitor; harmonic content; insulating medium; temperature

Speaker

Tian Fang

student Huazhong University of Science and Technology

Submission Author

Tian Fang Huazhong University of Science and Technology

Hua Li Huazhong University of Science and Technology；School of Electrical and Electronic Engineering

Letian Tang Huazhong University of Science and Technology；School of Electrical and Electronic Engineering

Jiang Guo China Electric Power Research Institute；China Electric Power Research Institute Co., Ltd. Wu Han

Qingdong Zhu State Grid；State Grid Shandong Electric Power Company Electric Power Research Institute