The selection of overhead bare conductors requires the comprehensive consideration of several factors. First, regarding electrical performance, conductors must be chosen based on requirements such as the voltage level and power transmission capacity of the line. For instance, lines with higher transmission capacities require conductors with high electrical conductivity to minimize energy loss.
Furthermore, parameters such as electrical resistance and reactance must be evaluated to ensure the conductors meet the operational requirements of the power system. Mechanical performance is equally critical; conductors must possess sufficient strength and flexibility, determined by factors like span length, terrain, and meteorological conditions. For long-distance, large-span lines, conductors with high tensile strength-such as aluminum conductor steel-reinforced (ACSR) cables-are necessary, whereas lines traversing complex terrain that may require frequent bending demand conductors with greater flexibility. Corrosion resistance is also a vital consideration; the chosen conductor must offer a level of corrosion resistance appropriate for its specific environment.
In coastal regions or areas with significant industrial pollution, it is essential to select conductors with high corrosion resistance, such as aluminum-clad steel strands or conductors treated with anti-corrosive coatings. Additionally, economic factors-including the initial price of the conductor, installation expenses, and ongoing maintenance costs-must be taken into account. While ensuring that all electrical and mechanical requirements are met, one should prioritize conductors that offer the best value, thereby reducing both capital investment and operational costs. Finally, the service life of the conductor should be considered; opting for high-quality, durable products helps minimize the frequency and cost of future replacements.
