220kV同塔双回紧凑型线路导线排列优化研究

Optimization of Conductor Configuration for 220 kV Compact Double Circuit Transmission Lines on the Same Tower

由于同塔双回紧凑型输电线路很难换相,而其导线和避雷线的排列是三相电荷平衡的主要影响因素,因此研究导线的优化排列很有必要。采用面电荷密度法,计算各个导线的电荷和系统的部分电容,以此为基础,以导线的位置坐标为变量进行优化,使三相的电荷达到基本平衡。计算结果表明,优化后部分电容、每相最大电荷、电荷分布等都比优化前均匀得多。

Because the compact double transmission lines on the same tower is hard to exchange phases, and the configuration of conductors and lightning shield conductors has great influence on three phases＇ charge balance, so the optimization of conductor configuration is necessary. Based on the calculation of charge and system partial capacity of each conductor by surface charge density method, all conductors＇ position coordinates were treated as variables and were optimized to the basic balance of three phases＇ charge. The calculation result shows that the partial capacity, the max capacity of per phase and the charge distribution after optimization are more equal than before.