抄録
Recently, electric power transmission/substation systems need to be extended and they tend to be more compact From the backgrounds of electromagnetic field environment, especially, magnetic field environment in and around electric power facilities becomes more important However, many factors must be considered to investigate it, such as complicated can conditions, configurations of conductors and ferromagnetic structures, and so on. For more precise investigation of magnetic field environment, we must understand the quantitative influence of conductors and ferromagnetic structures.
In this paper, we describe how the conductive and ferromagnetic materials influence the ELF magnetic field distribution. We carried out the measurement and finite element analysis of magnetic flux density distribution around an aluminum plate, a soft magnetic iron plate and a 1/40 reduced model of an actual transmission tower. From the result, we clarified the influence of conductors and ferromagnetic substances on the magnetic flux density distribution around them. Finally, we showed the effectiveness of finite element analysis to evaluate the magnetic field around actual power facilities.
