基于匀场等效的非匀磁场曝露评估

发布时间：2018-03-09 01:02

本文选题：电磁环境　切入点：曝露评估　出处：《电工技术学报》2015年S1期 　论文类型：期刊论文

【摘要】：过度曝露于电磁场会对人体健康造成不良影响,因此,电磁环境的准确评估是输变电工程建设与维护中的重要问题之一。目前,对工程作业人员实际承受的非匀磁场曝露缺少有效评估方法,现有研究多基于均匀磁场曝露假设展开,存在过评估。针对这一不足,本文以本专业人员熟悉的空心电抗器磁场评估为算例,提出了非匀磁场曝露评估的匀场等效法。搭建了符合中国成人平均身材尺寸的人体模型,结合空心电抗器周围磁场分布特点,计算人体模型位于不同曝露位置时体内感应电场极值与身体承受最大磁场的比值,确定非匀曝露系数。将非匀曝露系数与匀场曝露系数比较,得到空心电抗器周围的等效匀场分布。经计算,匀场等效法确定的曝露危险区域比传统方法小三分之一。本文研究的方法为评估实际输变电工程电磁环境提供了新思路。
[Abstract]:Excessive exposure to electromagnetic fields can have adverse effects on human health. Therefore, accurate assessment of electromagnetic environment is one of the important problems in the construction and maintenance of power transmission and transformation engineering. There is a lack of effective evaluation method for the inhomogeneous magnetic field exposure actually suffered by engineering workers. Most of the existing studies are based on the assumption of uniform magnetic field exposure and have been evaluated. Taking the magnetic field evaluation of hollow reactor which is familiar to the professional as an example, this paper presents a uniform field equivalent method for the exposure assessment of non-uniform magnetic field. A human body model which accords with the average stature size of Chinese adults is set up. Combined with the distribution of magnetic field around the hollow reactor, the ratio of the maximum magnetic field to the maximum magnetic field in the body is calculated when the human body model is located at different exposure positions. By comparing the non-uniform exposure coefficient with the uniform field exposure coefficient, the equivalent uniform field distribution around the hollow reactor is obtained. The exposure risk area determined by the equivalent method of uniform field is 1/3 less than that of the traditional method. The method studied in this paper provides a new idea for evaluating the electromagnetic environment of actual transmission and transformation projects.
【作者单位】：同济大学电子与信息工程学院;
【分类号】：R135.99;TM47

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