Abstract
Due to the low transmission capacity margin of overhead conductors of ACSR type in the existing grid structure, the large-scale grid connection of new energy is greatly limited. However, 60% of IACS heat-resistant conductors have low conductivity and high power loss in the transmission process. Therefore, 61.5% of IACS heat-resistant aluminum alloy conductors with high conductivity are developed for line capacity expansion and reconstruction. The feasibility of 61.5% IACS high conductivity heat-resistant aluminum alloy stranded conductor is analyzed in combination with the example of urban power line capacity expansion and transformation. Under the condition that the call height margin of the original line tower is sufficient, the use of this type of conductor can achieve obvious energy saving effect and effectively improve the transmission capacity and energy utilization rate of the line have been increased. Under the condition that the sag of the conductor and the bearing capacity of the tower do not increase compared with the original line, the capacity of the original line can be increased by at least 1.4 times by using this type of conductor. At the same time, because the conductor uses aluminum clad steel core as the reinforcing core, the corrosion resistance of the conductor is effectively improved to ensure the overhead transmission in coastal areas or heavily polluted areas safe operation reliability of electric lines.
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