Three Winding Transformer Evaluation of K-Factor Value and Harmonic Distortion

It is impossible to completely eliminate harmonics from the electric power supply. Harmonic distortion waves are produced by the nonlinear load. On the other hand, due to the fact that the harmonic current flows through the transformer winding, the presence of harmonics causes an abnormally high increase in temperature inside the transformer. It is possible to utilise the rise in the K-factor value of the transformer as a representation of the increase in heat. In order to reduce harmonic distortion and the transformer K-factor value, the author of this article proposes using a detuned reactor in conjunction with a shunt harmonic passive filter. Three-winding transformer is the one that is being utilised. To compare the reduction in harmonic distortion and the K-factor value, many situations are required. The first case study involves harmonics and assumes that no harmonic filter has been installed. In the second scenario, a shunt harmonic passive filter is used to cut down on the amount of harmonic distortion as well as the K-factor value. The third option combines a detuned reactor with a shunt harmonic passive filter in order to accomplish the same goal as the second scenario. The values of THD_I and THD_V for the first scenario are 20.62 percent and 27.83 percent, respectively. while the value of the K-factor is 4.46. The THD_I and THD_V values for the second scenario are, respectively, 10.66% and 15.39%. In the meanwhile, the value of the K factor is 2.92. Regarding the second scenario, the THD_I and THD_V values come in at 2.82% and 4.91%, respectively. while the value of the K-factor is 1.13. When compared to the other scenarios, the third one achieves the greatest results in terms of reducing harmonic distortion and K-factor to the lowest possible levels. The shunt harmonic passive filter's effectiveness may be enhanced by the presence of a detuned reactor.