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Comparative study on space charge distribution measurements using PEA and PWP methods on high voltage insulation

Othman, Norasikin and Mohamed Piah, Mohamed Afendi and Adzis, Zuraimy and Ahmad, Noor Azlinda (2013) Comparative study on space charge distribution measurements using PEA and PWP methods on high voltage insulation. Jurnal Teknologi (Sciences and Engineering), 64 (4). pp. 43-47. ISSN 0127-9696

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Official URL: http://dx.doi.org/10.11113/jt.v64.2099

Abstract

Major drawbacks to high voltage insulator especially on electrical aging process have been an issue for decades. The internal electric field distribution due to the presence of local space charge will distort, which in turn may cause the insulating material to degrade and finally can lead to accelerated aging and electrical breakdown. Comprehension of space charge buildup in solid insulator is crucial to determine how aging occurs, thus enabling the prediction of insulator lifetime. Space charge measurement has been extensively researched in recent years and has become a common method of investigating solid insulator properties. Pressure Wave Propagation (PWP) and Pulsed Electro-Acoustic (PEA) are non-destructive dielectric testing methods used to determine the space charge distribution within the insulation. This paper presents the basic principles, typical measurement setup and comparison of results from several published papers on application of PWP and PEA methods to investigate space charge accumulation. The space charge distribution in the sample is measured as current and voltage signals obtained from PWP and PEA methods respectively. Judging from extracted results of other research, both methods show the capability to detect premature aging activities in the insulator, which is necessary for condition monitoring of high voltage insulators

Item Type:Article
Uncontrolled Keywords:aging, breakdown, space charge, PWP, PEA
Subjects:T Technology > TA Engineering (General). Civil engineering (General)
Divisions:Electrical Engineering
ID Code:50079
Deposited By: Siti Nor Hashidah Zakaria
Deposited On:02 Dec 2015 02:09
Last Modified:27 Sep 2018 04:12

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