The Physical Mechanism of Frequency-Induced Inflection Point for Oil-Paper Insulation Under High-Frequency Square-Wave Voltage

doi:10.1109/TPS.2022.3182551

	The Physical Mechanism of Frequency-Induced Inflection Point for Oil-Paper Insulation Under High-Frequency Square-Wave Voltage
	Liu, Kai 1; Li, Xiaonan 1,2; Yang, Yan 1; Wu, Zihao 3; Liu, Tong 3; Zhu, Minghui 3; Wu, Guangning 1
	2022-08
发表期刊	IEEE TRANSACTIONS ON PLASMA SCIENCE
ISSN	0093-3813
卷号	50 期号:8 页码:2388-2395
摘要	High-frequency (HF) oil-immersed transformers with small size and light weight have been paid wide attention by researchers. Its oil-paper insulation frequently withstands HF over-voltages at frequencies of several kilohertz and above, resulting in the too early failure of oil-paper insulation. In order to investigate the effect of HF on oil-paper insulation, this article investigates the partial discharge (PD) characteristics of oil-paper insulation under HF stress. The experimental results show that a frequency-induced inflection point is existed near 10 kHz and the PD parameters of HF voltages is much higher than that ac voltages. Besides, the theoretical mechanism is expounded to interpret and understand the formation process of frequency-induced inflection points more easily. It can be found that the change in frequency causes the change in the charge decay time constant and the residual charge on the insulating surface, resulting in the formation of the frequency-induced inflection point at HE These results might contribute to determine the characteristics of PDs between HF voltages and ac voltages. It can provide references for the research and production of HF transformers.
关键词	Frequency-induced inflection point high-frequency (HF) square wave Nomex paper oil-paper insulation partial discharge (PD)
DOI	10.1109/TPS.2022.3182551
收录类别	SCIE ; EI
语种	英语
WOS研究方向	Physics
WOS类目	Physics, Fluids & Plasmas
WOS记录号	WOS:000824752500001
出版者	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
EI入藏号	20222912378544
EI主题词	Partial discharges
EI分类号	413 Insulating Materials ; 701.1 Electricity: Basic Concepts and Phenomena ; 704.2 Electric Equipment ; 706.2 Electric Power Lines and Equipment ; 811.1 Pulp and Paper
来源库	WOS
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/159470
专题	兰州理工大学
通讯作者	Li, Xiaonan
作者单位	1.Southwest Jiaotong Univ, Sch Elect Engn, Chengdu 610032, Peoples R China; 2.Lanzhou Univ Technol, Coll Elect & Informat Engn, Lanzhou 730050, Peoples R China; 3.Elect Power Res Inst, State Grid Shaanxi Elect Power Co, Xian 710000, Peoples R China
通讯作者单位	电气工程与信息工程学院
推荐引用方式 GB/T 7714	Liu, Kai,Li, Xiaonan,Yang, Yan,et al. The Physical Mechanism of Frequency-Induced Inflection Point for Oil-Paper Insulation Under High-Frequency Square-Wave Voltage[J]. IEEE TRANSACTIONS ON PLASMA SCIENCE,2022,50(8):2388-2395.
APA	Liu, Kai.,Li, Xiaonan.,Yang, Yan.,Wu, Zihao.,Liu, Tong.,...&Wu, Guangning.(2022).The Physical Mechanism of Frequency-Induced Inflection Point for Oil-Paper Insulation Under High-Frequency Square-Wave Voltage.IEEE TRANSACTIONS ON PLASMA SCIENCE,50(8),2388-2395.
MLA	Liu, Kai,et al."The Physical Mechanism of Frequency-Induced Inflection Point for Oil-Paper Insulation Under High-Frequency Square-Wave Voltage".IEEE TRANSACTIONS ON PLASMA SCIENCE 50.8(2022):2388-2395.