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Optimal Phase Arrangements of Underground Transmission Lines Installed by Metropolitan Electricity Authority of Thailand

机译:泰国大都市电力管理局安装地下输电线路的最佳相排列

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摘要

This paper investigates the magnetic field generated by underground transmission lines, which are practically installed by Metropolitan Electricity Authority (MEA) of Thailand. Specifically, various phase arrangements for duck bank (4×6) and pipe-jacking (21 ducts) of the MEA underground transmission lines were analyzed and simulated by analytical approach based on Biot-Savart Law using MA TLAB program. To assure the accuracy of the simulated results, they were compared to the measured results under the same conditions where the test cite was at the tunnel link between Lad-Phrao and Vibhavadi substations, about 8 km, and the tunnel depth was at 15 m from the ground surface. In addition, the magnetic field was simulated from the measured RMS current, recorded every 30 seconds for 16 hrs. By aforementioned setting conditions, the optimal phase arrangements of MEA underground transmission lines in terms of minimized magnetic field for duck bank (4×6) and pipe-jacking (21 ducts) were proposed. Finally, from the simulated results, it shows that the magnetic field generated by underground transmission lines with proposed optimal phase arrangement techniques is not greater than the maximum exposure limits given by the World Health Organization and International Commission on Non-Ionizing Radiation Protection.
机译:本文调查了地下传输线产生的磁场,其实际上由泰国大都市电力管理局(MEA)安装。具体地,通过基于MA TLAB程序的基于Biot-Savart法律的分析方法分析和模拟MEA地下传输线的鸭堤(4×6)和管道(21管道)的各种相布。为了确保模拟结果的准确性,将它们与测量结果进行比较,如在Lad-Phrao和Vibhavadi变电站之间的隧道连接,约8km,隧道深度距离的相同条件下地面。另外,从测量的RMS电流模拟磁场,每30秒记录16小时。通过上述设定条件,提出了在最小化鸭堤(4×6)和管道(21管道)的最小磁场方面的最佳相位布置。最后,从模拟结果中,它表明,由地下传输线产生的具有所提出的最佳相位布置技术的磁场不大于世界卫生组织和国际非电离辐射保护国际委员会给出的最大曝光限制。

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