An Accuracy Improving of Determining a Inductances of Three-Phase Busbar's Trolleys, Taking into Account Higher Current Harmonics

The paper presents a method, that allows to determine with high accuracy the reactance of trolleys for each
$k-th$
frequency of the harmonics of the current. It allows to take into account the presence of the effect of intimacy, surface effects, skin effect. Also the asymmetry between the phases and the distance between a trolleys. On the basis of research, dependences are obtained, that allow to determine the values of inductance, leakage inductance and mutual inductance. And also take into account the distance between the trolleys, the form of the trolleys, their number, as well as the asymmetry of phase currents, without spending time on modeling the field. According to the results of the study it was found that the inductance of the phase busbar's trolley, when changing the angle of the current vector for its full period in the neighboring trolley, changes with the same initial phase for all
$k-th$
harmonics of the cosine law, a constant component the leakage inductance of the trolley of the corresponding frequency
$k-th$
harmonic current.