Optimum Spacing Between Parallel Transmission Lines in Egyptian Grid Based on Metaheuristic Optimization Mechanisms

The essential target of this research work is to obtain the optimum distance among equivalent high and extra high voltage power lines in Egyptian utility. Three equivalent extra high voltage power lines are introduced in this work. The first two lines are the selfsame geometry with a voltage of 220 kV. The third line is a single circuit flat arrangement, three bundles, and a voltage of 500 kV. The electric field at the ground surface for those lines is estimated using the COMSOL computer package and verified applying a numerical technique called Charge Emulation Mechanism (CEM). Three optimization algorithms were applied to obtain the optimal distance among the proposed transmission lines, these are Particulate Swarm Optimization (PSO), Firefly Algorithm (FA), and Harmony Search Algorithm (HSA). The ultimate field values of the presented lines are influenced by modifying the phase sequence of each circuit and the distance among the lines. The effect of sag changing is considered for optimal spacings is also studied.