A Study on AC Resistance Calculation of Single Rectangular Conductors

This paper presents a study on calculating the ac resistance of single rectangular conductors using finite element method (FEM), considering a quasi-static approximation. Different analytical approximations for ac resistance of rectangular conductors are also presented, and their accuracy with different conductor thicknesses are examined by comparison with FEM results. Two examples are considered: a very thin rectangular conductor, and a square conductor. A transient simulation is performed using the square conductor to investigate the effect of different ac resistant calculations on damping in the time domain simulation. This work would help in appropriate selection of analytical approximation of ac resistance of rectangular conductors for engineering applications depending on the thickness of conductors.