Journal of Radiation Research and Radiation Proces ›› 2016, Vol. 34 ›› Issue (5): 50501-050501.doi: 10.11889/j.1000-3436.2016.rrj.34.050501

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Analysis of electromagnetic dosimetry by ultra high voltage AC transmission line with belt sag

ZHANG Lihang1, LU Mai2, CHEN Xiaoqiang1, HOU Liwei2   

  1. 1 College of Automation and Electrical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China;
    2 Key Laboratory of Opto-electronic Technology and Intelligent Control, Lanzhou Jiaotong University, Lanzhou 730070, China
  • Received:2016-05-05 Revised:2016-05-30 Online:2016-10-20 Published:2016-10-14
  • Supported by:

    Supported by National Nature Science Foundation of China (51267010, 51567015), Gansu Science Fund for Distinguished Young Scholars (1308RJDA013)

Abstract:

The aim is to investigate the electric field effect produced by the ultra high voltage (UHV) AC transmission lines with belt sag on the human body. A simulation software named Comsol and a human body model were used to calculate and analyze the electric field effect caused by the nabla UHV AC transmission lines closely to the reality, and then the result was compared with the one produced by ideal straight lines. The results indicated that in the human and the near-field region, the distribution of electric field and induced current was nonuniform. The maximum electric field focused on the above region of human head surface. The value of electric field intensity and induced current density in the joints of the body were high. Below the actual and ideal straight UHV transmission lines, the electric field intensity and induced current density produced by the belt sag wire in all tissues including central nervous system of human was 17% to 19% or so higher than the ideal straight. Compared with the guidelines of International Commission on Non-ionizing Radiation Protection(ICNIRP), the electric field intensity did not exceed the threshold value for both occupational exposure and general public exposure. In the aspect of induced current density, except that the value in the lower legs and lower scalp exceeded the limitation of general public exposure slightly, that of the other parts did not exceed the limits of ICNIRP. The conclusion shows that the electromagnetic radiation caused by the two kinds of UHV AC transmission lines is safe for the occupational people. As to the general public, some proper protection must be taken.

Key words: Ultra high voltage AC, Belt sag, Ideal straight lines, Electric field, Induced current density

CLC Number: 

  • TL72