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Application of Park's power components to the differential protection of three-phase transformers |
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| Authors: | Luís MR Oliveira AJ Marques Cardoso |
| Affiliation: | a Instituto Superior de Engenharia, Universidade do Algarve, Campus da Penha, P-8005-139 Faro, Portugal b University of Beira Interior, Department of Electromechanical Engineering, Calçada Fonte do Lameiro, P-6200-001 Covilhã, Portugal c Instituto de Telecomunicações, Department of Electrical and Computer Engineering, University of Coimbra, Pole II, P-3030-290 Coimbra, Portugal |
| Abstract: | This paper presents a new scheme for power transformers differential protection, in which the concept of the Park's instantaneous differential powers is introduced. The proposed method is able to detect winding insulation failures and to distinguish them from magnetizing inrush current transients. Experimental and simulation results are presented and discussed. |
| Keywords: | Differential protection Incipient winding faults Inrush currents Park's vector p-q power theory Transformers |
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