In the last years there has been a considerable increase in electricity consumption and\udgeneration from renewable sources, especially wind and solar photovoltaic. This phenomenon has\udincreased the risk of line saturation with the consequent need of increasing the capacity of some power\udlines. Considering the high cost and the time involved in installing new power lines, the difficulty in\udacquiring tower sites and the related environmental impacts, some countries are considering to replace\udconventional conductors with HTLS (High-Temperature Low-Sag) conductors. This is a feasible and\udeconomical solution. In this paper a numerical-FEM (Finite Element Method) approach to simulate the\udtemperature rise test in both conventional and high-capacity substation connectors compatible with HTLS\udtechnology is presented. The proposed coupled electric-thermal 3D-FEM transient analysis allows\udcalculating the temperature distribution in both the connector and the conductors for a given current profile.\udThe temperature distribution in conductors and connectors for both transient and steady state conditions\udprovided by the proposed simulation method shows good agreement with experimental data.
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