Traction network V/v120-degree single-phase synchronous uninterruptible power supply control system

According to the traction network V/v120-degree single-phase synchronous uninterrupted power supply control system, a national power grid 220kV or 110kV three-phase power frequency synchronous power supply is input to a traction transformer primary and secondary winding single-phase output 27.5 kv to a sliding contact line, a zero potential line, a rail and a stay wire to be connected to serve as a current return line, a plurality of related control configurations are arranged in a system diagram, and the whole network is combined to be synchronously connected in parallel; omnibearing load power of an on-line running train can be changed at will, the three-phase current of a power grid is reflected to be balanced all the time, the efficiency approaches 100%, and various configurations such as split-phase sections do not exist. The sliding contact lines are synchronously connected in parallel in the whole network without complex configurations of AT, AC, DC, AC and the like, the cost-to-price ratio is within A