Magnetic Field Measurement and Simulation in the Tower Window of Cup-Tower of Extra-high Voltage AC Transmission Line

doi:10.11930/j.issn.1004-9649.2014.11.59.4

Abstract

Abstract: Currently, cup-tower is the main support structure for extra-high voltage AC transmission lines. Magnetic intensity varies in different locations along the tower window for the running lines. With the development of live working in extra-high voltage AC transmission lines, higher request is put forward for the operator with live working in tower. As ferromagnetic material may distort the distribution of magnetic intensity, in order to identify the magnetic field level around the tower and understand the influence of magnetic intensity on the workers working in tower window, the magnetic intensity of several typical points in the cup-tower’s window of a 500 kV AC line is measured and a similation of the distribution level of magnetic intensity at the same points is conducted. The results show that measured values are well coincided to the simulation results, and the level of distribution of magnetic intensity is far less than the occupational exposed value proposed by ICNIRP. So there is no need to take protective measures against the magnetic field during live working on 500 kV AC transmission lines.

Key words: cup-tower, extra-high voltage transmission line, spatial magnetic field, live working, safety protection, ferromagnetic material, magnetic field distribution

CLC Number:

TM153

TANG Bo, ZHU Jian-xiong, FANG Shu-bo, ZHANG Gong-da, ZHANG Rui. Magnetic Field Measurement and Simulation in the Tower Window of Cup-Tower of Extra-high Voltage AC Transmission Line[J]. Electric Power, 2014, 47(11): 59-63.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2014.11.59.4

https://www.electricpower.com.cn/EN/Y2014/V47/I11/59

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