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ABSTRACT: The significant increase in power demand, with the resulting saturation of electrical transmission and distribution lines, has made Iberdrola to review its strategy to increase the ampacity of existing lines. Traditionally, line upgrading techniques have been applied (change from single conductor to twin bundle, increase in conductor cross section, increase in voltage level or the use of double circuits).
Electricity Distribution, 2005. CIRED 2005. 18th International Conference and Exhibition on; 07/2005
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ABSTRACT: The technological development experienced by industrialized countries has brought about a huge increase of demand for electric power. As a result, the utilities in charge of electric power transmission and distribution have noticed that the high-voltage overhead lines are reaching critical values of ampacity and sag. In order to tackle this issue, we have undertaken the analysis of the eventual replacement of traditional aluminum conductor steel reinforced (ACSR) conductors with other conductors of better thermal properties. In the present paper, we report on the results obtained about how well the suspension strings of the ACSR conductors perform with the gap-type aluminum conductor steel reinforced (GTACSR) conductors. This study has been achieved using a multipurpose finite-element analysis (FEM) software package for both design and simulation.
IEEE Transactions on Power Delivery 08/2004; · 1.35 Impact Factor
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ABSTRACT: The unstoppable rise in electricity demand is causing the saturation of the power transmission network to such an extent that supply problems are arising in some areas due to overheated conductors sagging above security distance limits. An approach to solve this problem is the replacement of actual conductors by new conductors with high temperature and low sag characteristics. This type of conductors is able to transmit more power than traditional ACSR conductors, as they can work at higher temperatures while keeping their sag under actual security margins. However, the higher temperature in the conductors can affect the correct performance of the traditional clamps. To develop an analysis on this subject software tools have been used, consisting on CAD programs for the design and modeling of the clamps and FEM programs for the simulation of the models. This work shows the results of the study describing the characteristics of the simulation.
Power Tech Conference Proceedings, 2003 IEEE Bologna; 07/2003
