NDLI: Experimental investigations of improved dielectric condition monitoring methods on transformer oil-paper insulation system

Content Provider	IEEE Xplore Digital Library
Author	Yang, X. Nielsen, S. Ledwich, G.
Copyright Year	2014
Description	Author affiliation: Sch. of Electr. Eng. & Comput. Sci., Queensland Univ. of Technol., Brisbane, QLD, Australia (Yang, X.; Nielsen, S.; Ledwich, G.)
Abstract	Frequency Domain Spectroscopy (FDS) is successfully being used to assess the insulation condition of oil filled power transformers. However, it has to date only been implemented on de-energized transformers, which requires the transformers to be shut down for an extended period which can result in significant costs. To solve this issue, a method of implementing FDS under energized condition is proposed here. A chirp excitation waveform is used to replace the conventional sinusoidal waveform to reduce the measurement time in this method. Investigation of the dielectric response under the influence of a high voltage stress at power frequency is reported based on experimental results. To further understand the insulation ageing process, the geometric capacitance effect is removed to enhance the detection of the ageing signature. This enhancement enables the imaginary part of admittance to be used as a new indicator to assess the ageing status of the insulation.
Starting Page	1
Ending Page	4
File Size	1310360
Page Count	4
File Format	PDF
ISBN	9781479920631
DOI	10.1109/ICDL.2014.6893101
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-06-29
Publisher Place	Slovenia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Chirp Frequency measurement Insulation Power transformer insulation MATLAB Legged locomotion Computers Geometric effects component Dielectric measurement FDS Energized insulation system Imaginary admittance
Content Type	Text
Resource Type	Article

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