Accuracy Improvement for the Determination of Parameters and Voltage Drops in Busbars, Considering the Networks Power Factor

Abstract

The power systems must satisfy the requirements both for high reliability and efficiency. The main component of the shop power supply systems is a busbar. There have been certain engineering techniques for the estimation of parameters, voltage and power losses, characterized by having a high error. Other methods have had a significant calculation efficiency, but without allowing the voltage drop to be determined as a function of the network power factor. Therefore, the aim of this work was to develop an approach that allowed an accurate estimation of the parameters and voltage drop in trolleys, depending on the network power factor. This approach was based on the decomposition of the electromagnetic processes in a trolley busbar by connecting one phase to estimate both the resistance and reactance in the absence of the external field, and two phases to estimate the resistance and reactance in the presence of the external field. The most significant results were the determination of the resistances and reactance, depending on the frequency of the current harmonics and the distance between the phases of the busbar. The dependences were proposed to estimate the resistance and reactance for the corresponding phases and current harmonic. The analytical expression of the ratio between the voltage drop in trolleys and the power factor of the network was obtained. The testing data confirmed the high accuracy of the proposed approach. The significance of the results composed a more precise determination of the parameters and voltage drops in each phase of trolleys, irregardless of their location, number, shape, as well as the phase currents’ non-symmetry, wasting no time for the field simulation