Analysis of internal winding short circuit faults in power transformers using transient finite element method coupling with external circuit equations

作者: Vahid Behjat , Abolfazl Vahedi

DOI: 10.1002/JNM.1868

关键词: Isolation transformerRotary variable differential transformerLinear variable differential transformerDistribution transformerLeakage inductanceDelta-wye transformerElectrical engineeringEnergy efficient transformerEngineeringCurrent transformer

摘要: SUMMARY Interturn short circuit faults are the leading cause of power transformer failures. If not quickly detected, these usually develop into more serious faults, which would result in irreversible damage to transformer, unexpected outages, and consequential costs. The aim this research is obtain a better understanding physical behavior transformers presence interturn as well discover best indicators for detection faults. To end, time stepping finite element model has been developed analyze transient real when working under winding fault conditions. model, coupled with external equations, allows us simulate dynamic supply loads connections. FEM computations show ability electromagnetic flux inside terminal currents, circulating current shorted turns useful monitoring parameters detection. Copyright © 2013 John Wiley & Sons, Ltd.

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