As there is an inductance, the suspension current of different suspension points of suspension
electromagnets have different perturbation and time lag to a certain extent.
The swing arm length of nether arms is not analyzed as an effect variable in this paper because changing the swing arms of nether arms is equal to changing the suspension hard point which involves the coordination of hard points of suspension
This format of the amplitudes [a.sub.an], [b.sub.an] representation harmonizes well with the design document for TL pylons which regulates coordinates of points of suspension
of its wires with respect to earth surface.
where: s = H - h is the conductor sag, L - distance between the points of suspension
, H - the height of the highest and h - the lowest points above the ground.