Hayashi N, Isaka K, Yokoi Y
Department of Electrical and Electronic Engineering, Faculty of Engineering, The University of Tokushima, Japan.
Bioelectromagnetics. 1989;10(1):51-64. doi: 10.1002/bem.2250100106.
This paper presents a theoretical analysis of electromagnetic environments in power substations in service. A new analytical method is developed and applied to magnetic field calculations in 187-kV and 66-kV substations. Experimental results verify that the method offers a good prediction of the magnetic field profiles in the substations except for the areas where localized field sources exist. The analytical results show that the magnetic field strength depends to a great extent on how the load powers distribute on individual lines and buses, that the magnetic fields in substations have a three-dimensional characteristic, and that the predominant field component depends on the position of interest. Moreover, it is suggested that objects placed in substations are exposed not only to magnetic fields of high strength in comparison to those in houses or near the distribution networks but also to fields with several percent of harmonic distortion.
本文对运行中的变电站电磁环境进行了理论分析。开发了一种新的分析方法，并将其应用于187 kV和66 kV变电站的磁场计算。实验结果验证了该方法除了在存在局部场源的区域外，能很好地预测变电站内的磁场分布。分析结果表明，磁场强度在很大程度上取决于负载功率在各线路和母线上的分布情况，变电站内的磁场具有三维特性，且主要场分量取决于所关注的位置。此外，研究表明，变电站内放置的物体不仅会受到比房屋或配电网附近更高强度的磁场影响，还会受到含有百分之几谐波畸变的磁场影响。
