NDLI: Study on FDS characteristics of oil-immersed paper insulation bushing under non-uniform moisture content

Content Provider	IET Digital Library
Author	Zhang, Daning Zhao, Haoxiang Yun, Hao Liu, Xiaowei Han, Yanhua Mu, Haibao Zhang, Guan jun
Abstract	Capacitive high-voltage bushing is one of the typical oil-immersed paper insulation equipment, which is an indispensable external connection component for power transformers. In order to evaluate the effectiveness of frequency domain spectroscopy (FDS) for diagnosing moisture content of oil-immersed paper insulation bushing, this article studied the frequency-domain dielectric characteristics of oil-immersed paper insulation samples and field bushing. At the same time, the basic principle of interfacial polarisation is used to analyse the samples and field bushing with non-uniform moisture content. The results show that the moisture content affects the whole frequency band of the FDS curve. When the distribution of moisture content is non-uniform, the paper with high moisture content has a great influence on the whole FDS curve of oil-immersed paper insulation. In addition, the FDS curves will show a significant loss peak. The frequency of the peak point gradually moves towards the high frequency as the non-uniformity of the moisture content distribution increases. The experimental results show that the variation law of oil-immersed paper insulation can be used to quantitatively evaluate the moisture content and moisture type of oil–paper insulation power equipment.
Starting Page	691
Ending Page	697
Page Count	7
ISSN	17518822
Volume Number	12
e-ISSN	17518830
Issue Number	Issue 5, Aug (2018)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-smt/12/5
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-smt.2017.0595
Journal	IET Science, Measurement & Technology
Publisher Date	2018-03-26
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Bushings Capacitive High-voltage Bushing Dielectric Measurement Dielectric Variables Measurement FDS Characteristic Frequency Domain Analysis Frequency Domain Spectroscopy Frequency-domain Dielectric Characteristic Humidity Measurement Hygrometry Interfacial Polarisation Mathematical Analysis Measurement of Basic Electric And Magnetic Variables Moisture Measurement Nonuniform Moisture Content Diagnosis Oil-immersed Paper Insulation Bushing Oil-immersed Paper Insulation Equipment Oil-paper Insulation Power Equipment Organic Insulation Paper Power Transformer Power Transformer Insulation Transformer And Reactors Transformer Oil
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Electrical and Electronic Engineering

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