Arranging Overhead Power Transmission Line Conductors Using Swarm Intelligence Technique to Minimize Electromagnetic Fields

Abstract

Abstract-Although there is no certain known mechanism of how the electromagnetic fields (EMFs) at power frequency (50/60 Hz) can affect human health, it has been epidemiologically shown that they have many hazards on human health. Also the power frequency fields may interfere with the nearby electrical and electronic equipment. In response to the precautionary principle, it might be needed in some situations to reduce the magnetic and electric fields of a high voltage line segment when it passes in close proximity to a populated area or may interfere with sensitive equipment. In other words, new arrangements of high voltage "green lines" are needed. This paper introduces a numerical solution based on Particle Swarm Optimization (PSO) technique, to reduce both magnetic and electric fields of high voltage overhead transmission line by rearranging the conductors. The horizontal, vertical, and triangular configurations of both single circuit and double circuit transmission lines were investigated. The examples presented in this paper show that the rearranged line configurations can introduce up to 81% reduction in magnetic field and up to 84% in electric field when the effects of ice and wind are considered, and up to 97% reduction in both magnetic and electric fields when these effects are neglected. A comparison is made between the cost of reducing EMFs of a line segment in a suburban area in Amman in Jordan, and the cost of not-reducing EMFs, where it is found that the cost of reducing the fields is outweighed by the "possible health costs" otherwise.

Accurate Calculation of the Right-of-Waywidth for Power Line Magnetic Field Impact Assessment

“…This compact expression still provides an exact representation of the magnetic field intensity around a three-phase line and, in turn, makes it possible to assess the dependence of the field intensity on electrical and geometrical line parameters which is of primary importance for determining an estimate of the ROW width. It is worth noting that (3) can be used for optimizing conductor placement when designing compact line arrangements to mitigate the field intensity in proximity of overhead lines as described in [15,16].…”

EMF Estimation of Over Head Transmission Line Using CS Algorithm with Aid of NFC

“…The magnetic field around a three-phase line can be computed by superimposing the individual contribution of the current of each phase conductor and taking into consideration the return currents through the earth. The magnetic field intensity at the point 'j' is achieved by taking into account the contribution of all 'N' conductors, presuming parallel lines over a flat earth [26]. A line conductor is located at (…”

Novel multi-objective optimization method of electric and magnetic field emissions from double-circuit overhead power line

“…Typically, optimization methods combine EMF objective functions into a single fitness function. The following different optimization techniques aimed to determine optimal solutions are generally applied: genetic algorithm (GA) -based techniques [10], differential evolution stochastic search algorithm [11] and particle swarm optimization method [12]. The single fitness function for all the said optimization techniques is obtained by scaling electric field strength and magnetic field strength (or magnetic flux density) with weight or utility function.…”