Estimation of Series Capacitance of a Transformer Winding Based on Frequency-Response Data: An Indirect Measurement Approach

Pramanik, Saurav and Satish, L (2011) Estimation of Series Capacitance of a Transformer Winding Based on Frequency-Response Data: An Indirect Measurement Approach. In: IEEE Transactions on Power Delivery, 26 (4). pp. 2870-2878.

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Abstract

A novel procedure to determine the series capacitance of a transformer winding, based on frequency-response measurements, is reported. It is based on converting the measured driving-point impedance magnitude response into a rational function and thereafter exploiting the ratio of a specific coefficient in the numerator and denominator polynomial, which leads to the direct estimation of series capacitance. The theoretical formulations are derived for a mutually coupled ladder-network model, followed by sample calculations. The results obtained are accurate and its feasibility is demonstrated by experiments on model-coil and on actual, single, isolated transformer windings (layered, continuous disc, and interleaved disc). The authors believe that the proposed method is the closest one can get to indirectly measuring series capacitance.

Item Type:	Journal Article
Publication:	IEEE Transactions on Power Delivery
Publisher:	IEEE
Additional Information:	Copyright 2011 IEEE. Personal use of this material is permitted.However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Keywords:	Driving-point impedance;frequency response;ladder network; series capacitance;transformer winding
Department/Centre:	Division of Electrical Sciences > Electrical Engineering
Date Deposited:	16 Feb 2012 09:07
Last Modified:	27 Mar 2014 08:26
URI:	http://eprints.iisc.ac.in/id/eprint/43456

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