NDLI: Localization of Changes in a Model Winding Based on Terminal Measurements: Experimental Study

Content Provider	IEEE Xplore Digital Library
Author	Ragavan, K. Satish, L.
Copyright Year	1986
Abstract	By using some properties of driving-point functions and adopting an iterative circuit synthesis approach, the location, extent, and type of change introduced in a model winding could be identified, based on terminal measurements. In this study, a model winding was used. From knowledge of its measured short-circuit and open-circuit natural frequencies, and pertinent winding data, an equivalent circuit was synthesized (called reference circuit). Next, changes were introduced at different locations in the model winding and its natural frequencies were measured. Corresponding to every new set of measured natural frequencies, a new circuit was synthesized (with topology remaining unchanged). A comparison of these circuits with the reference circuit revealed that a mapping could be established between changes introduced in the model winding and those predicted by the synthesized circuits. Many case studies are presented by considering continuous-disc and interleaved winding representations. Reasonably good results were obtained. Thus, localization of changes, based on terminal measurements, is shown to be a possibility. So, it is believed that these findings could be of some assistance in addressing the ultimate task of locating mechanical deformations in actual transformer windings.
Sponsorship	IEEE Power Engineering Society
Starting Page	1557
Ending Page	1565
Page Count	9
File Size	365548
File Format	PDF
ISSN	08858977
Volume Number	22
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-07-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Circuit synthesis Frequency synthesizers Equivalent circuits Windings Frequency measurement Iterative methods Circuit topology Predictive models Condition monitoring Impulse testing winding deformation and localization driving-point functions open-circuit and short-circuit natural frequencies
Content Type	Text
Resource Type	Article
Subject	Energy Engineering and Power Technology Electrical and Electronic Engineering

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