Increasing the efficiency of determining the parameters of trolley busbars based on field simulation

Abstract

Modern systems of shop power supply can be of considerable length. Therefore, their parameters and electrical characteristics have a significant impact on the quality of electricity, operating modes of electrical consumers and the energy efficiency of technological processes. Techniques for calculating the parameters and characteristics of busbars available in engineering practice are based on the methods of circuit modelling. Circuit parameters are usually determined based on generalized equations. These equations are obtained as a result of a number of assumptions, which limits the area of their use. An alternative to methods based on empirical dependencies can be the use of methods for calculating electrical parameters and characteristics based on field modelling. Thus, the work proposed a mathematical model of electromagnetic processes in the active elements of trolleys busbars. This model allows to take into account design parameters, nonlinearity of magnetic properties, the influence of harmonic components of currents and voltage. Based on the implementation of a mathematical model, a method was proposed for determining the parameters and characteristics of busbars trolleys based on field modelling. This allows you to take into account design parameters, nonlinearity of magnetic properties, the influence of harmonic components of currents and voltages. This model has high accuracy and efficiency of numerical implementation. The influence of the steel casing on the electrical parameters and characteristics of the busbar is established. The presence of a steel casing leads to a decrease in the power factor, an increase in voltage drops and distortion of their phases, as well as increase losses by 2 %. An assessment of the impact on active power losses due to harmonic components of currents has been carried out. The presence of harmonic components of currents within the standard leads to an additional increase in losses by 3 %. However, when the standardized values are exceeded, their effect on active power losses increases significantly. The proposed method has high accuracy and efficiency of numerical implementation and can be implemented using software with the status of a free license (for example, FEMM).