Study of Quantification of Coupling of Human Body to Power Frequency Electric and Magnetic Fields

人体工频电场、磁场耦合的量化研究

• 批准号: 02452138
• 负责人: ISAKA Katsuo
• 金额: $ 1.79万
• 依托单位: The University of Tokushima
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1991
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-02452138/
• 关键词: Electric field; Magnetic field; Power frequency; Human body; Transmission line; Poynting's vector; Internal induced current; Phase

The quantification of coupling of human body to power frequency electric and magnetic fields is needed to discuss not only about their biological effects, but also the electromagnetic field conditions for the animal exposure tests. This study deals with the phasor analyses of electric and magnetic fields from power lines, and the density analyses of induced currents in human body. The results obtained are as follows :1. Induced current densities have been calculated in the spheroidal human model. It is found that the density of induced current due to electric field is several times as great as that due to magnetic field, both fields being from power lines.2. The Poynting's vector analysis shows that the effective power density near the ground under power lines is on the order of several kw/m*m or more.3. The human brain is shielded by the cerebrospinal liquid covering the brain when the human body is exposed to electric fields.4. Assuming that the biological effects of electric and magnetic fields are based on induced current density, the electric field should be used in animal exposure tests. The magnetic field may act so as to change the direction of induced currents.

需要对人体与工频电场和磁场的耦合进行量化，不仅可以讨论其生物学效应，还可以讨论动物暴露试验的电磁场条件。本研究涉及电力线电场和磁场的相量分析以及人体感应电流的密度分析。得到的结果如下： 1．感应电流密度已在球形人体模型中计算。研究发现，电场产生的感应电流密度是磁场产生的感应电流的数倍，且两个场均来自于电力线。 2．坡印廷矢量分析表明，电力线下近地面的有效功率密度在几kw/m*m量级甚至更高。 3．当人体暴露在电场中时，人脑受到覆盖大脑的脑脊液的屏蔽。4．假设电场和磁场的生物效应是基于感应电流密度，则动物暴露试验中应使用电场。磁场可以起作用以改变感应电流的方向。

项目成果

N. Hayashi, K. Isaka et al.,: "Analysis of 60-Hz Magnetic Fields near Ground Level in 187-KV Switch yard of A 187/66-KV AC Substation" IEEE Transactions on Power Delivery. 7. 237-244 (1992)

N. Hayashi、K. Isaka 等人：“187/66-KV 交流变电站 187-KV 开关场中近地平面 60-Hz 磁场分析”IEEE 电力传输交易。

K. Isaka, N. Hayashi et al.,: "Characterization of Electric and Magnetic Fields at Ground Level under EHV Transmission Lines" Proceedings of 7th International Symposium on High Voltage Engineering. 51-54 (1991)

K. Isaka、N. Hayashi 等人：“超高压输电线路地面电场和磁场的特性”第七届国际高电压工程研讨会论文集。

K.Isaka: "Characterization of Electric and Magnetic Fields at Ground Level under EHV Transmission Lines" Proc.7th International Conference on High voltage Engineering. (1991)

K.Isaka：“超高压输电线路地面电场和磁场的特性”Proc.7th 国际高压工程会议。

N.Hayashi: "Analysis of 60ーHz Magnetic Fields near ground Level in 187ーkV Switchyard of A 187/66ーkV AC Substation" IEEE Transactions on Power Delivery. 7. 237-244 (1992)

N. Hayashi：“187/66 kV 交流变电站 187 kV 开关站中近地平面 60 Hz 磁场的分析”IEEE Transactions on Power Delivery（1992 年）7. 237-244。

N. Hayashi, K. Isaka et al.,: "Development of Magnetic Field Dosimeter for Exposure Application" Proceedings of 7th International Symposium on High Voltage Engineering. 83-86 (1991)

N. Hayashi、K. Isaka 等人，“用于暴露应用的磁场剂量计的开发”第七届国际高电压工程研讨会论文集。