几种边界条件对节能导线年费用的影响分析

与等外径的普通钢芯铝绞线相比，节能导线直流电阻较小，在不降低机械性能的前提下，可减少输电线路损耗，达到节能效果。结合某典型500kV交流双回路线路工程，以普通钢芯铝绞线为基准对比分析了3种等外径的节能导线方案（钢芯高导电率铝绞线、铝合金芯铝绞线、中强度铝合金绞线）的电能损耗、本体投资，通过分别对比几种不同边界条件（输送容量、电价、导线市价）下的各导线方案的年费用，提出了3种节能导线在各边界条件下的适用范围，为工程中节能导线的选型和推广应用提供了参考。

Influence Analysis of Several Different Boundary Conditions on Annual Cost of Energy-Saving Wires

Compared with common aluminium conductor steel reinforced （ACSR） with equal outside diameter, the DC resistance of energy-saving conductor is lower, which can decrease the power losses of transmission line and achieve energy-saving effect in the premise of without reducing the mechanical properties of wires. Combined with a typical 500 kV AC double-loop transmission lines, this paper comparative analyzed the power loss and ontology investment of three kinds of energy-saving wires （high conductivity ACSR, ACAR, moderate-strength AAAC） with the same outside diameters, by taking common ACSR as reference； and put forward the applicable scopes of three energy-saving wires by contrasting the annual cost of each wire scheme in several different boundary conditions （transmission capacity, electricity price and wire price）, which could provide some references for the selection, popularization and application of energy-saving wires in transmission lines.