Simulation of potential and electric field across faulty ceramic disc insulator string

Reddy, Subba B and Naik, Satish B (2013) Simulation of potential and electric field across faulty ceramic disc insulator string. In: ICACCT–2012 IEEE 6th International Conference on Adv Computing & Communication Technologies, 3rd Nov. 2012, Panipat, Haryana, India.

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Abstract

Ceramic/Porcelain insulators are widely used in power transmission lines to provide mechanical support for High voltage conductors in addition to withstand electrical stresses. As a result of lightning, switching or temporary over voltages that could initiate flashover under worst weather conditions, and to operate within interference limits. Given that the useful life in service of the individual insulator elements making up the insulator strings is hard to predict, they must be verified periodically to ensure that adequate line reliability is maintained at all times. Over the years utilities have adopted few methods to detect defective discs in a string, subsequently replacement of the faulty discs are being carried out for smooth operation. But, if the insulator is found to be defective in a string at some location that may not create any changes in the field configuration, there is no need to replace to avoid manpower and cost of replacement. Due to deficiency of electric field data for the existing string configuration, utilities are forced to replace the discs which may not be essentially required. Hence, effort is made in the present work to simulate the potential and electric field along the normal and with faults induced discs in a string up to 765 kV system voltages using Surface Charge Simulation Method (SCSM). A comparison is made between simulated results, experimental and field data and it was found that the computed results are quite acceptable and useful.

Item Type:	Conference Proceedings
Publisher:	Technia Journal
Additional Information:	Copyright of this article belongs to Technia Journal.
Keywords:	Ceramic/ Porcelain Insulators; Defective insulator Disc; Surface Charge Simulation Method
Department/Centre:	Division of Electrical Sciences > High Voltage Engineering (merged with EE)
Date Deposited:	21 May 2013 11:41
Last Modified:	21 May 2013 11:41
URI:	http://eprints.iisc.ac.in/id/eprint/46376

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