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An Efficient Method to Compute Transfer Function of a Transformer from its Equivalent Circuit

Ragavan, K and Satish, L (2005) An Efficient Method to Compute Transfer Function of a Transformer from its Equivalent Circuit. In: IEEE Transactions on Power Delivery, 20 (2). 780 -788.


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The dynamics of an electrical network can completely be described from the knowledge of its poles and zeros. Computation of poles and zeros of the transfer function (TF) of a transformer winding, represented as acoupled ladder network, involves solution of a large-sized equivalent circuit. This paper presents a novel solution based on state space analysis approach. It is shown, how the linearly transformed state space formulation, together with algebraic manipulations, can become useful. In the proposed formulation, symbolic variables (i.e., Laplacevariable, s) are suitably manipulated, so as to render computations purely numerical. With this feature, there is practically no limit on the size of networks and topologies (including resistances to modellosses) that can be represented. So, virtually any number of windings of a. transformer can be considered, permitting a comprehensive analysis of winding behavior and its interactions, that was until now severely limited, by the simplifying assumptions imposed by existing methods.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to Institute of Electrical and Electronics Engineers Inc.
Keywords: Eigenvalues and diagonalization;poles and zeros;state space analysis;transfer function;transformer
Department/Centre: Division of Electrical Sciences > High Voltage Engineering (merged with EE)
Depositing User: B.S Priyanka
Date Deposited: 17 May 2005
Last Modified: 19 Sep 2010 04:18
URI: http://eprints.iisc.ac.in/id/eprint/3189

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