Electromagnetic coupling modeling and accuracy verification of non-parallel cable structure

Abstract

Due to the random bundling of the cable bundle, the different conductors within the cable present non-parallel distribution structural features. Such structural feature leads to different cross-sectional structures at different positions along the line. The spacing between different conductors and the height from the ground change, which leads to changes in the distribution parameters. This requires that when solving the electromagnetic coupling of the cable bundle, it is necessary to divide the cable bundle into multiple grid segments along the line, and calculate the distribution parameters according to the cross-sectional geometry information at different grid segment positions.<br>On the basis of the integration of the transmission line model and the distributed parameter model, the calculation of the distribution parameters of different mesh segments according to the cross-sectional structure of different mesh segments of the cable is realized in this paper. When the parameters are brought into the transmission line model, an electromagnetic coupling model suitable for non-parallel cable structures is established. In order to verify the accuracy of the model, a unit cable structure from real cable with non-parallel distribution characteristics was designed. The calculation results with the proposed model were compared with the calculation results of the full-wave algorithm and the experimental results, and shows a good agreement.<br>In order to understand the influence of the cable non-parallel structure characteristics on the response of electromagnetic coupling to cable, the comparison of electromagnetic coupling response results between the parallel cable and non-parallel cable structures were obtained and analyzed, which shows the significant effect of the non-parallel structure characteristics of the cable on the electromagnetic coupling. It is confirmed that the influence of the non-parallel cable structure characteristics must be considered in the electromagnetic coupling simulation of the real cable.