Synthesis of combined shielding system for overhead power lines magnetic field normalization in residential building space

Problem. Most studies of power frequency magnetic field reduced to safe level in residential buildings located near overhead power lines carried out based on two-dimensional magnetic field modeling, which does not allow studying of original magnetic field shielding effectiveness in residential building edges. The goal of the work is synthesis of combined active and multi-circuit passive shielding system to improve shielding efficiency of initial magnetic field to sanitary standards level in residential building edges generated by overhead power lines. Methodology. System synthesis methodology based on vector game solution, in which vector payoff calculated based on of Maxwell’s equations solution in a quasi-stationary approximation using the COMSOL Multiphysics software. Vector game solution calculated based on hybrid optimization algorithm, which globally explores synthesis search space using Particle Swarm Optimization and gradient-based Sequential Quadratic Programming to rapidly calculated optimum synthesis point from Pareto optimal solutions taking into account binary preference relations. Results. During combined active and multi-circuit passive shielding system synthesisspatial arrangement coordinates of 16 contours of passive shield and two compensating windings, as well as windings currents and phases of active shield calculated. New scientific results are theoretical and experimental studies of synthesized combined active and multi-circuit passive shielding system efficiency for magnetic field created by overhead power lines. Scientific novelty. For the first time synthesis methodology for combined active and multi-circuit passive shielding system taking into account original field shielding effectiveness decrease in residential building edges for more effective reduction of industrial frequency magnetic field created by overhead power lines developed. Practical value. Practical recommendations for the reasonable choice of the spatial arrangement of a multi-circuit passive shield and two shielding windings of active shielding system for magnetic field created by overhead power lines are given. The possibility of reducing the initial magnetic field induction to the sanitary standards level is shown. References 42, figures 16.