Influence Mechanism of Temperature on Partial Discharge Characteristics of Composite Insulation Interface Under High Frequency Electrical Stress

被引：0
|
作者：
Li Z. [1 ]
Xie Z. [1 ]
Ren H. [1 ]
Dong Z. [1 ]
Li Q. [1 ]
Wang Z. [2 ]
机构：
[1] State Key Lab of Alternate Electrical Power System with Renewable Energy Sources (North China Electric Power University), Changping District, Beijing
[2] College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2023年 / 43卷 / 22期
基金：
中国国家自然科学基金;
关键词：
air gap cavity; composite insulation; partial discharge; solid-state transformer; temperature;
D O I：
10.13334/j.0258-8013.pcsee.221691
中图分类号：
学科分类号：
摘要：
The air gap cavity at interface is an important cause of partial discharge in solid state transformer(STT) composite insulation. In order to clarify the influence mechanism of the temperature on PD characteristics of air gap cavity under high-frequency electric field, a set of composite insulation partial discharge test platform under high frequency voltage is established. The PD characteristics of the epoxy resin-polyimide composite insulation interface are investigated under different temperature. The results show that when the experimental temperature of composite insulation increases from 30℃ to 180℃, the PD inception voltage decreases by 38.9%, the average discharge amplitude and the number of one-cycle discharge increase from 35.2mV and 50 times/s to 171.9mV and 268times/s, respectively, while the discharge repetition rate also increases from 50 times/s to 268 times/s. At the same temperature, the discharge amplitude decreases with the increase of voltage frequency, while the discharge times increase. It is revealed that the influence mechanism of temperature on PD characteristics of composite insulation is as follows: the temperature rise will improve the migration speed of charge at the interface and decrease the synthetic field distortion in the air gap cavity, which increase the number of discharges and the discharge amplitude. This paper provides a basis for the detection of composite insulation state of SST. ©2023 Chin.Soc.for Elec.Eng.
引用
收藏
页码：8965 / 8976
页数：11
相关论文
共 32 条
  • [1] LIU Tao, LI Qingmin, HUANG Xuwei, Frequency-induced inflection point phenomenon and formation mechanism of partial discharge with polyimide films[J], Proceedings of the CSEE, 37, 9, pp. 2750-2758, (2017)
  • [2] HAN Shuai, LI Qingmin, LIU Weijie, Impacts of coupled temperature-frequency effects on partial discharge characteristics of high frequency solid state transformer insulation[J], Transactions of China Electrotechnical Society, 30, 2, pp. 204-210, (2015)
  • [3] ZONG Sheng, HE Xiangning, WU Jiande, Overview of power electronics based electrical energy router [J], Proceedings of the CSEE, 35, 18, pp. 4559-4570, (2015)
  • [4] SUN Qiuye, WANG Bingyu, HUANG Bonan, The optimization control and implementation for the special energy internet[J], Proceedings of the CSEE, 35, 18, pp. 4571-4580, (2015)
  • [5] LI Zixin, GAO Fanqiang, ZHAO Cong, Research review of power electronic transformer technologies [J], Proceedings of the CSEE, 38, 5, pp. 1274-1289, (2018)
  • [6] SHAO Shuai, JIANG Mingming, ZHANG Junming, A capacitor voltage balancing method for a modular multilevel DC transformer for DC distribution system [J], IEEE Transactions on Power Electronics, 33, 4, pp. 3002-3011, (2018)
  • [7] Shi CHEN, CZASZEJKO T．, Partial discharge test circuit as a spark-gap transmitter[J], IEEE Electrical Insulation Magazine, 27, 3, pp. 36-44, (2011)
  • [8] MORSALIN S, PHUNG B T, CAVALLINI A, Measurement and modeling of partial discharge arising from different cavity geometries at very low frequency [J], IEEE Transactions on Dielectrics and Electrical Insulation, 27, 4, pp. 1110-1118, (2020)
  • [9] ILLIAS H, CHEN G, LEWIN P L．, Modeling of partial discharge activity in spherical cavities within a dielectric material[J], IEEE Electrical Insulation Magazine, 27, 1, pp. 38-45, (2011)
  • [10] LIU Tao, DONG Guojing, LI Qingmin, Coupling effect of electrical and thermal stresses on insulation life of polyimide under high frequency impulses[J], High Voltage Engineering, 46, 7, pp. 2504-2510, (2020)
1234