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Partial discharge behaviour under operational and anomalous conditions in HVDC systems

Azizian Fard, M, Emad Farrag, M, McMeekin, S.G. and Reid, Alistair J. ORCID: 2017. Partial discharge behaviour under operational and anomalous conditions in HVDC systems. IEEE Transactions on DEI 24 (3) , pp. 1494-1502. 10.1109/TDEI.2017.006469

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Power cables undergo various types of overstressing conditions during their operation that influence the integrity of their insulation systems. This causes accelerated ageing and might lead to their premature failure in severe cases. This paper presents an investigation of the impacts of various dynamic electric fields produced by ripples, polarity reversal and transient switching impulses on partial discharge (PD) activity within solid dielectrics with the aim of considering such phenomena in high voltage direct current (HVDC) cable systems. Appropriate terminal voltages of a generic HVDC converter were reproduced - with different harmonic contaminations - and applied to the test samples. The effects of systematic operational polarity reversal and superimposed switching impulses with the possibility of transient polarity reversal were also studied in this investigation. The experimental results show that the PD is greatly affected by the dynamic changes of electric field represented by polarity reversal, ripples and switching. The findings of this study will assist in understanding the behaviour of PDs under HVDC conditions and would be of interest to asset managers considering the effects of such conditions on the insulation diagnostics.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Energy Systems Research Institute (ESURI)
Uncontrolled Keywords: Firing angle, Power conversion harmonics, HVDC transmission, Insulation, Polarity reversal, Power system transients, Partial discharge, Ripples
Additional Information: Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works. This work has been submitted to the IEEE for possible publication. Copyright may be transferred without notice, after which this version may no longer be accessible
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
ISSN: 1070-9878
Date of First Compliant Deposit: 6 June 2017
Date of Acceptance: 13 March 2017
Last Modified: 02 May 2023 17:49

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