所以线路换位的目的是要使每相导线感应阻抗和每相的电容相等，以减少三相线路参数的不平衡。
It analyzed the unbalance of both single-circuit line and double-circuit lines in same tower, made a summary of their transposition methods.
为降低长输电线路的电流不平衡度，需要进行导线换位。
Conductor transposition is necessary to reduce unbalanced current in long transmission lines.
为了减少电力系统正常运行时电流和电压的不对称性，原则上高压架空线路应采用换位措施。
In order to decrease the asymmetry of current and voltage of the power system, the high voltage transmission lines should be transposed in principle.
因此必须利用导线换位，并且采用适当的相序排列方式以及换位方向来减小线路的不平衡度。
Therefore, to minimize line imbalance, conductor transposition, as well as proper phase sequence and transposition orientation have to be used.
但设计和运行经验证明，高压线路完全换位会减弱线路的机械强度，并增加其建造和运行的费用。
Design and operation experience has shown that, the transposition of high voltage transmission lines would weaken the mechanical strength and increase the cost of its construction and operation.
但设计和运行经验证明，高压线路完全换位会减弱线路的机械强度，并增加其建造和运行的费用。
Design and operation experience has shown that, the transposition of high voltage transmission lines would weaken the mechanical strength and increase the cost of its construction and operation.
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