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Evaluation and measurement of magnetic field exposure over human body near EHV transmission lines

机译：超高压传输线附近人体磁场暴露的评估和测量

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摘要

Power frequency (50/60 Hz) magnetic field exposure still draws the attention of many researchers worldwide to investigate its harmful effects on living bodies. In light of this attention, as the population increases, the overlap between the power transmission lines and the settlement areas causes a problem (as in the case of exposure in random, residential, commercial and other areas, which lie very near or under the power transmission lines). In this paper, the power frequency magnetic fields, over a human body, at different positions, near extra high voltage (EHV) transmission lines are demonstrated, both analytically and practically. For the analytical part, the human body is approximately simulated as a parallelepiped. Two different positions for a human are selected near 500 and 220 kV power transmission lines. The magnetic field intensity along the vertical center line of the human is calculated. The effects of two different line configurations (for 220 and 500 kV power systems) and human positions, with respect to the transmission line, are considered. The paper also presents the actual practical magnetic field values measured near actual power transmission lines (220 and 500 kV) using a magnetic field measuring instrument. These transmission lines represent parts of the transmission network of the Egyptian united power system, near Cairo and El-Asher of Ramadan, under the actual loads. The results obtained, from the analytical studies and practical measurements, are compared with the international standards of the magnetic field exposures.
机译：暴露于电源频率（50/60 Hz）的磁场仍然吸引了全世界许多研究人员的注意力，以研究其对生物体的有害影响。鉴于这种关注，随着人口的增加，输电线路和居民区之间的重叠会造成问题（例如，在随机，住宅，商业和其他地区暴露的情况下，这些地区位于电力附近或电力之下）传输线）。在本文中，无论是在分析上还是在实践中，都演示了人体上不同位置，超高压（EHV）传输线附近的工频磁场。对于分析部分，人体近似模拟为平行六面体。在500 kV和220 kV输电线附近选择一个人的两个不同位置。计算沿人的垂直中心线的磁场强度。考虑了两种不同的线路配置（对于220 kV和500 kV电力系统）和人体位置（相对于传输线）的影响。本文还介绍了使用磁场测量仪在实际输电线路（220和500 kV）附近测得的实际实际磁场值。这些传输线代表了埃及联合电力系统在实际负荷下靠近开罗和斋月的El-Asher的部分输电网络。通过分析研究和实际测量获得的结果与国际磁场暴露标准进行了比较。

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