Harmonics Performances of Single Phase Transformer due to DC Bias

Abstract:

The investigation of the direct current (dc) bias effect on single phase power transformer through their harmonics performance is present in this paper. The experimental study is done by the dc bias current injected simultaneously with alternating current (ac) source to primary winding of transformer. The input ac voltage to primary winding is maintained constant during investigation and the dc currents increased gradually. Compare to pure ac power applied, the results show that the waveforms distorted when the dc bias exist. The pulsated waveforms are pushed to half cycle in which the bias current is in the same direction as magnetizing current (unsymmetrical pulsated) and even harmonics are significant.

• Periodical: Applied Mechanics and Materials (Volume 793)
• Pages: 202-205
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.793.202
• Online since: September 2015
• Authors: Syafruddin Hasan, Muzammir Isa, M.A. Roslan, M. Hafizi, D. Musdar, Surya Hardi, M. Fitra
• Keywords: DC Bias, Even Harmonics, Half-Cycle, Pulsated Waveforms, Single Phase Transformer

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