普铁牵引变电所有星三角接线变压器,现普遍采用V/V接线变压器。本文通过对比星三角变压器和等容V/V变压器绕组的过负荷能力及短路阻抗的大小,得出这两种变压器供电能力相差不大,以期对星三角变压器过流保护的整定和牵引变电所变压器的选型提供参考。 Pu lead tractive transformer all star delta wiring transformers, are now widely used V / V wiring transformers. In this paper, by comparing the over-load capacity of the delta-delta transformer and the isovolt V / V transformer windings and the size of the short-circuit impedance, it is concluded that the power supply capacity of these two transformers is not much different, in order to set the over-current protection setting and traction substation Transformer selection for reference.