The utility model discloses an unified power flow controller current conversion station series transformer advances line knot to be constructed, including two door type framework, series transformer, arrester and incoming unit that have the upper beam, incoming unit includes: two sets of A, B, C looks GIS entrance bushing, two sets of A, B, C looks support type manage femalely, and trans column pipe is female, a set of A, B, the mutually high cross -line of C, and two sets of A, B, C looks inlet wire, two sets of pipe mothers are lead wire and the female support of two sets of pipe down. The utility model has the advantages of: optimize the size on main variable field ground to can reduce a pin framework and corresponding high cross -line, thereby reduce the construction degree of difficulty and cost that whole change power station structure arranged, and practiced thrift certain design space.