The stray current of mainline of urban rail transit is collected in the yards and sections after leakage and then flows back to the mainline through unidirectional conduction devices in the yards and sections.The conventional unidirectional conduction device is able to effectively reduce the influence to the buildings and facilities around the track caused by the stray current corrosion,however,its frequent conduction also brings either the mutual interaction of stray current between yard/section and mainline or the equipment ignition.In order to isolate the flow path of stray current,a scheme of responsive intelligent conduction device is put forward and tests are made for it on the actual line for its execution.The test results show that the average conduction time is reduced by 97.8%for the connecting device in throats of yard and section and the path by which the stray current of mainline and rail potential flowing into the yard and section obstructed effectively after execution of responsive intelligent conduction scheme.
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