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Home > Archive>Volume 46, Issue 5, 2023 >40-49. DOI:10.11835/j.issn.1000-582X.2021.217
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Ground wire energy extraction method for overhead transmission lines
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1.Electric Power Research Institute of Guizhou Power Grid Co., Ltd., Guiyang 550002, P. R. China;2.Electrical Engineering, Chongqing University, Chongqing 400044, P. R. China

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Supported by Supporting Project of the Key Laboratory of Anti-ice and Disaster Mitigation of China Southern Power Grid Co., Ltd. (GZKJXM20190748).

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    Abstract:

    Taking energy from the ground wire is a way of supplying energy for all kinds of sensing and monitoring equipment in the power system transmission network. In this paper, firstly, the principle of taking electricity of a typical overhead ground wire was examined. Next, its equivalent parameter model was established. Finally, the equivalent voltage and equivalent impedance of the electricity taking port were mathematically derives. Simulation of a 220 kV line with ATP-EMTP software was carried out. The influence of the energy load on the distribution of ground wire current and the influence of factors including wire current, ground resistance, span range, energy load on the electricity parameters were analyzed. The results show that limited by the induced potential and ground wire self-impedance, the ground wire current did not exceed 10 A. The voltage showed an increasing trend with the increase of impedance, and finally stabilized at about 27 V. When the energy extraction load was 2.5 Ω, the maximum energy extraction power obtained was 175.03 W. These results provide a data basis for the design of subsequent energy takers.

    Reference
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黄欢,邓钰龙,马晓红,蒋兴良,吴建蓉,胡琴,杨旗,吕乾勇,杨柳青.架空输电线路地线取能方法[J].重庆大学学报,2023,46(5):40~49

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  • Received:May 23,2021
  • Online: May 31,2023
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