Analysis of magnetic field distribution in power system using finite element method

In this paper mathematical models for transmission line are expressed in second-order partial differential equations derived by analyzing magnetic field distribution around a 500-kV power transmission line under normal loading and short-circuit conditions. The problem of study is intentionally two-dimensional due to the property of long line field distribution. To verify its use, i) single-circuit and ii) double-circuit, 500-kV power transmission lines have been employed for test. Finite element methods (FEM) for solving wave equations have been exploited. The computer simulation based on the use of the FEM has been developed in MATLAB programming environment. The generalization capability of the designed GRNN network under large number of worker positions has been tested and predicted. From all test cases, the calculation line of 1.0m above the ground level is set to investigate the magnetic fields acting on a human in comparative with ICNIRP standard.