Synergistic Effect of Epoxy Resin Dielectric Properties Deterioration Under the Action of High-frequency Square Wave Electric Field-temperature Field

被引：0
|
作者：
Si, Jian [1 ]
Wen, Tao [1 ]
Zhao, Yi [1 ]
Ma, Bo [1 ]
Huang, Xinyi [1 ]
Sun, Xuqian [1 ]
机构：
[1] School of Electrical and Automation Engineering, Hefei University of Technology, Hefei
来源：
Gaodianya Jishu/High Voltage Engineering | 2024年 / 50卷 / 09期
关键词：
dielectric properties; epoxy resin; polarization loss; square wave voltage; synergistic effect;
D O I：
10.13336/j.1003-6520.hve.20240855
中图分类号：
学科分类号：
摘要：
： The epoxy resin sealing insulation in high-frequency transformers has been exposed to prolonged high-frequency square wave voltage stress and thermal stress. The deterioration of the insulation performance within the epoxy resin under these conditions significantly hampers the operational reliability of the transformers. Previous studies primarily focused on analyzing the dielectric properties of epoxy resins under alternating current sinusoidal electric fields and temperature fields, however, the studies on the change of dielectric properties of epoxy resin under the action of high-frequency square-wave electric field and temperature field are rarely available in the literature. In this paper, a high-frequency square-wave voltage and temperature joint aging experimental platform is set up to study the dielectric properties of epoxy resin samples under different aging electric field strengths and temperatures, and the results of the combined electro-thermal aging are compared with the results of the separate thermal aging and electric aging. The experimental results show that the effect of electro-thermal joint aging on the dielectric properties of epoxy resin is more significant and greater than the superimposed effect of electricity and heat, indicating there is a synergistic effect in the process of electro-thermal joint aging. By constructing the polarization loss simulation model of epoxy resin under high-frequency square-wave voltage, it is clarified that the temperature increase of the sample caused by the polarization loss of epoxy resin under the action of high-frequency square-wave electric field is an important reason to aggravate the deterioration of the dielectric properties of epoxy resin. The results of this study can provide a reference for the evaluation of the insulation state of high-frequency transformers. © 2024 Science Press. All rights reserved.
引用
收藏
页码：4007 / 4018
页数：11
相关论文
共 22 条
  • [1] YE Zhijun, LIN Xiaoming, TAN Kaijia, Et al., Review of high frequency transformer technology, Power System Technology, 45, 7, pp. 2856-2870, (2021)
  • [2] WANG Weiwang, LIU Ying, HE Jiefeng, Et al., Research status and development of high frequency transformer used in high voltage and large capacity power electronic transformer, High Voltage Engineering, 46, 10, pp. 3362-3373, (2020)
  • [3] ZHANG Pengning, XIANG Xueyan, LI Wei, Et al., High frequency transformer technology for power electronic transformer, High Voltage Engineering, 48, 12, pp. 4996-5011, (2022)
  • [4] SUN Kai, LU Shilei, YI Zheyuan, Et al., A review of high-power high-frequency transformer technology for power electronic transformer applications, Proceedings of the CSEE, 41, 24, pp. 8531-8545, (2021)
  • [5] SHANG Xingyu, PANG Lei, BU Qinhao, Et al., Research review on insulation issues of high-power high-frequency transformers, Proceedings of the CSEE, 44, 8, pp. 3306-3326, (2024)
  • [6] YANG Jinggang, ZHANG Ke, CHEN Wu, Et al., Review on researches of high-power medium-frequency transformer, Journal of Power Supply, 18, 1, pp. 4-17, (2020)
  • [7] SHANG Xingyu, PANG Lei, BU Qinhao, Et al., Effect of temperature on partial discharge and breakdown characteristics of epoxy resin under square wave voltage, High Voltage Engineering, 49, 8, pp. 3286-3295, (2023)
  • [8] WANG Youyuan, WANG Shiyou, HUANG Yanguang, Et al., Study on thermal aging characteristics of epoxy resin of dry-type transformer, High Voltage Engineering, 44, 1, pp. 187-194, (2018)
  • [9] HUANG Yanguang, YI Lu, Effect of thermal ageing on dielectric property of epoxy resin for dry-type transformer, Insulating Materials, 49, 9, pp. 53-56, (2016)
  • [10] XIE Wei, YANG Zheng, CHENG Xian, Et al., Study on thermo-oxygen aging characteristics of epoxy resin material, Transactions of China Electrotechnical Society, 35, 20, pp. 4397-4404, (2020)
123