The Effects of the Span Configurations and Conductor Sag on the Electric-Field Distribution Under Overhead Transmission Lines

Seeking the optimal arrangements of overhead power line conductors with conductor sagging consideration

“…Shown local discretezation is essential within the analytical calculations, where required time effort should be as low as possible. Obtained results were compared with results presented in [13][14][15][16], where findings are practically identical.…”

“…In case of electric field emissions near the tower defining that method is not appropriate, or 3-D integration techniques [13] should be applied. Near the tower the conductors are at the highest point and the electric field is lower even for 50-60%.…”

“…Since the conductor cross section A is considered as constant, the balance of tensile forces can be expressed with tensile stress. Thus the force balance in the horizontal and vertical direction yields Eqs (12) and (13). Considering Eq.…”

“…Calculation of the magnetic field density and electric field strength [12][13][14][15][16] are performed with the use of equations for static electric and magnetic fields, whilst it is necessary to emphasise that both fields are calculated, when the sagged conductor is considered [16]. In proposed case the multiobjective optimization was transformed into singleobjective optimization instead of pareto-optimization procedure [17,18].…”

“…The main difference between both contributions is that in [12] conductors are straight, while in this work the conductor sagging is considered within the optimization procedure. According to [13,16] the difference between results, at the point of maximal conductor sagging, where conductors are straight at the average height and those where the conductor sagging is considered are approximately 30-40%. Much lower differences (within 1-2%) are obtained where the straight conductors are placed at the point of maximal conductor sagging.…”