高电（High power）.doc

高电（High power） 1. the tower line according to analysis the effects of different classification, application and features. . (1) straight line tower is mainly used for line segments, generally do not bear along the direction line tension under vertical load. (2) strain tower is mainly used for line segments, except under the same load and line tower also bear the tension and can be broken, line break, rechuck accident control in a strain section, convenient construction and maintenance. (3) the angle tower line is mainly used for turning angle, vertical load and wind pressure wire also bear the wire pull force, generally available to balance the unbalanced tension at the corner. (4) the terminal tower is mainly used at the end of the first line, to withstand a unilateral conducting heavy vertical load and wind pressure, and unilateral tension wire tower. (5) special tower generally used when lines cross roads, railways, rivers, valleys, power lines, communication lines etc.. (6) to the same tower tower. Since the line space constraints of the corridor, to the overhead line to be built in the same tower. 2. analysis of the scope and structure of overhead conductors. The general structure of overhead wires can be divided into three categories: single stranded wire, stranded, stranded load material. (1) single stranded conductor due to the manufacturing process, when the cross section increases, the mechanical strength decreased, so the single stranded wire section is generally below 10mm2, the widely used maximum to 6mm2. (2) stranded by multiple strands of wire twisted, multilayer strand adjacent layer twisted in opposite direction, andprevent line rolling twisting, the utility model has the advantages of high mechanical strength, flexibility, suitable for bending, current skin effect is small, the resistance of the same cross section of the single wire. (3) composite stranded refers to the two kinds of materials of stranded conductors, common is ACSR, widely used at