Study on Magnetic Field Distribution for the Catenary System

This paper analyzed the physical models of magnetic field around the catenary system with the modes of traction power supply of electrified railway, and got the theory calculation formulas of the magnetic field around the AC catenary system under several traditionally power supply methods. Combined the existing data and the practical test information, verified the correctness of the models brought forward and the corresponding theory calculation formulas. Then, making use of the simulation software self-developed, got the corresponding magnetic field simulation graphics under several kinds of typical power supply modes. This paper can provide some reference of methods for the further research of the magnetic field around the AC catenary system and the relevant foundation of theory; supply some theoretic support with the construction criterion´s formulation of electrified railway.