论文部分内容阅读
随着输电线路电压等级的不断提高,工频电磁场问题越来越受到人们的关注。分析了750 k V输电线路下简化人体模型的电场效应,构建了双手下垂、双手上举、撑伞以及行走的人体模型,比较了不同姿势下人体感应电场的分布情况。以双手下垂模型为例,研究了架空输电线离地高度对人体电场效应的影响。仿真计算结果表明,人体的存在会使其所在空间的电场分布发生畸变,人体姿势的改变会影响感应电场的分布情况,局部场强最大值总是出现在人体轮廓的尖端部位,导线离地高度越大,其下方人体的感应电场值越小。不同姿势下人体模型的局部场强最大值在允许的数值范围之内,750 k V超高压输电线路的工频电场不会对人体健康造成危害。
With the continuous improvement of transmission line voltage levels, the issue of power frequency electromagnetic fields has drawn more and more attention. The electric field effect of simplified human body model under 750 kV transmission line is analyzed. Human body model with hands sagging, hands lifting, umbrella holding and walking is constructed. The distribution of human induced electric field under different postures is compared. Taking the model of hands-drooping as an example, the effect of the height of overhead transmission line on the electric field effect of human body is studied. The simulation results show that the existence of the human body will distort the electric field distribution in the space where the human body is located. The change of the human body posture will affect the distribution of the induced electric field. The maximum of the local field strength always appears at the tip of the human body contour. The larger the human body below the induced electric field value is smaller. The maximum local field strength of the human body model under different postures is within the allowable range, and the commercial electric field of the 750 kv EHV transmission line will not cause harm to human health.