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- Application of Park's power components to the differential protection of three-phase transformersPublication . Oliveira, L. M. R.; Cardoso, A. J. MarquesThis 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.
- Power transformers differential protection using the p-q power theoryPublication . Oliveira, L. M. R.; Cardoso, A. J. MarquesThis paper describes the application of the p-q power theory to the differential protection of power transformers. The information provided by the harmonic content of the differential active and reactive power components is used to detect winding insulation failures and to distinguish them from magnetizing inrush current transients. A variety of test cases is presented in the paper, demonstrating the effectiveness of the protection strategy.