Transmission lines using aluminium cable steel reinforced ground wires nearby power substations

2010 IEEE/PES Transmission and Distribution Conference and Exposition: Latin America (T&D-LA) Pub Date : 2010-11-01 DOI:10.1109/TDC-LA.2010.5762861

S. Sobral, C. Peixoto, J. Amon F., D.S. Rezende, A.A. Menezes

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Abstract

This article shows the advantages of using transmission lines with ACSR (Aluminium Cable Steel Reinforced) ground wires in the neighbourhood of high voltage power substations. The concept of selfneutralized current is reminded in order to explain why the utilization of a double ACSR ground wire 7–20 km from the transmission line terminal substations is able to reduce up to 65% the value of the terminal substation ground mat current. It is also shown that, for power cables with metallic shielding grounded in both terminal substation ground mats, the reduction of mat current can be as large as 99.5%. The article reminds that these procuderes are already successfully used in several high voltage power substations now in operation. Some equivalent circuits are presented in order to allow a simple calculation of the value of the mat current (IM), using ACSR ground wires close to the terminal substations. It is also reminded that Steinmetz Circuit Theory has several advantages over the direct utilization of Maxwell Equations when computing A.C. transmission metallic circuits.

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输电线路在变电站附近采用铝缆钢加固接地线

本文介绍了高压变电站附近使用带ACSR接地线的输电线路的优点。为了解释为什么在距离输电线路终端变电站7-20公里的地方使用双ACSR接地线能够降低终端变电站接地电流高达65%的值，本文提出了自中和电流的概念。采用金属屏蔽的电力电缆在两端变电站地垫中接地，可使地垫电流减小99.5%。文章指出，这些程序已成功地应用于几个正在运行的高压变电站。一些等效电路是为了允许一个简单的计算垫电流(IM)的值，使用ACSR地线靠近终端变电站。在计算交流传输金属电路时，斯坦梅茨电路理论比直接使用麦克斯韦方程组有几个优点。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

2010 IEEE/PES Transmission and Distribution Conference and Exposition: Latin America (T&D-LA)

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