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.
结合负序电流的通用表达式，讨论了在不同负荷条件下的原边电流不平衡度。
The unbalanced degrees of current in primary winding under different load conditions are discussed, which are based on the general expressions of negative phase sequence current.
但是存在于两组功率级之间的些微差异会造成彼此的电流产生不平衡的状况，使得系统的可靠度降低。
However, the mismatch of two power stages in dual-phase architecture will produce current sharing between them, and system reliability decreases.
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