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2024-05-06
Research on Induced Electrical Characteristics of Agricultural Machinery Operating Under Ultra High Voltage ac Transmission Lines in Agricultural Area
By
Progress In Electromagnetics Research C, Vol. 143, 99-107, 2024
Abstract
In plain areas, the majority of the ultra-high voltage(UHV) transmission corridors are located in farmland. The induced voltage is generated on the metal casing of the machinery when agricultural machines are working on the ground near the transmission line. If the human body touches, transient electric shock(TES) may occur, causing displeasure and alarm to workers. Therefore, it is crucial to study the induced electrical characteristics in such scenarios. In this article, the finite element method (FEM) was employed to establish a model integrating a 1000 kV transmission line, tractor, and human body, and the induced voltage of the tractor and human body under the transmission line was calculated. Subsequently, a TES model was developed to calculate the current when an electric shock occurs. Finally, an experimental system was constructed in the area beneath the 1000 kV UHV AC line to measure the current characteristics of the human body during the TES. The results demonstrate that the induced voltage is contingent upon the position of research object and whether it is insulated from the ground. Additionally, ground conditions significantly influence the TES current induced by the voltage. Due to the electromagnetic shielding effect of the tractor's metal casing, the TES current experienced by the driver inside the machine is minimized. For ground staff, when the human body is insulated from the ground, the transient electric shock current they bear is smaller than that of the human body grounded.
Citation
Bin Hu, Meng Zhang, Xiaohe Zhao, Bingchen Hou, and Zhongqing He, "Research on Induced Electrical Characteristics of Agricultural Machinery Operating Under Ultra High Voltage ac Transmission Lines in Agricultural Area," Progress In Electromagnetics Research C, Vol. 143, 99-107, 2024.
doi:10.2528/PIERC24031602
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