Applying Finite Element Method Combined with Particle Swarm Optimization to Optimize Shield Wires for Transmission Line

Erecting shield wires is one of the effective measures to improve power frequency electric field environment around high voltage transmission line, which can reduce the impact of power frequency electric field to surroundings and human activity. There is an unknown multidimensional non-linear relationship among the quantity of shield wires, the suspended positions and shielding effectiveness. Therefore, finite element method combined with particle swarm optimization is proposed to solve this problem in the research. Shielding effectiveness is as optimization objective, the quantity, the diameter and the suspension positions of shield wires are optimization variables. Moreover, an optimization example is demonstrated, and the optimization results are satisfied. The proposed method is not only applicable to optimize shield wires, but also suitable for employing in other aspects of electromagnetic field inverse problems.