Transient electric field analysis for polluted composite insulators under HVDC stress

Nandi, S and Reddy, BS (2021) Transient electric field analysis for polluted composite insulators under HVDC stress. In: IEEE Transactions on Power Delivery, 36 (2). pp. 607-617.

PDF iee_tra_pow_36-2-607-617-2021.pdf - Published Version Restricted to Registered users only Download (3MB) | Request a copy

Abstract

The present investigation highlights simulation study performed considering the temporal transformation of the electric field from capacitive to resistive. The effect of uniform pollution, single dry-band, multiple dry-bands and non-uniform pollution are studied in detail. The simulation results indicate the effect of surface current can literally decrease the voltage withstand capability of the insulator. The simulations are carried out under time domain so that the simplicity and the physical integrity of the problem is retained. Experimental investigations are conducted to verify the obtained theoretical results. Investigations show that there is substantial decrement of scintillation inception voltage with time, further experimental observations are explained based on the theoretical results that have been derived. Based on the theoretical and experimental observations, it is thought that proper insulation design and optimal creepage should be provided under DC, as field distribution can change over a period with increasing surface conductivity.

Item Type:	Journal Article
Publication:	IEEE Transactions on Power Delivery
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The copyright for this article belongs to Institute of Electrical and Electronics Engineers Inc.
Keywords:	Electric fields; Excitons; HVDC power transmission; Pollution; Transients, Composite insulators; Experimental investigations; Field distribution; Non-uniform pollutions; Physical integrity; Surface conductivity; Temporal transformations; Transient electric fields, Insulator contamination
Department/Centre:	Division of Electrical Sciences > Electrical Engineering
Date Deposited:	13 Apr 2023 09:45
Last Modified:	13 Apr 2023 09:45
URI:	https://eprints.iisc.ac.in/id/eprint/80615

Actions (login required)

View Item