Magnetic field strength calculation for indoor substation

Aiming at plane busbars with large current being generally used from indoor substation, the paper presented the calculational model for the power frequency magnetic field based on dimension and distributed structure factors and so on. Finite element method was used to calculating the magnetic inductive intensity in the space nearby the busbars so as to research shield efficiency. The paper emphasized on discuss on influencing factors of the busbars structure such as their length, spacing and breadth to magnetic inductive intensity. Finally, feasible advises are put forward to reducing magnetic inductive intensity to reduce magnetic pollution surrounding the distribution that reduce electromagnetic interference to electron equipment and human health effect.