Ground energy storage system of motor train unit

The utility model relates to the technical field of energy storage, in particular to a ground energy storage system of a motor train unit, which comprises regenerative braking energy storage systems arranged on an uplink segment and a downlink segment of a train, and each regenerative braking energy storage system comprises a converter and a super-capacitor energy storage device. The alternating current side of the converter is connected with the tail end of the power supply arm and the track; the direct current side of the converter is connected with a converter of the super-capacitor energy storage device; the super-capacitor energy storage device comprises a converter, a converter controller and a super-capacitor bank. When the train runs on a long ramp and goes down the ramp, the super capacitor is controlled to be charged, regenerative braking energy generated by the train is absorbed, and the voltage of the overhead line system is recovered to the normal range; when the train runs on the long ramp, the