There exit various connection modes of differential protection of substationtransformer in the electrified railway traction in China.
我国电气化铁道中牵引变压器采用差动保护接线形式各不一样。
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However, at the distribution level, 'tie switches are used to switch feeders or feeder sections between transformers in the same station, or to adjacent substations for substationtransformer load.
It is because of the transformersubstation working content so important, the substation project construction quality should be cause extensive attention.