Urban rail transit active reverse transmission control system and control method

The invention discloses an urban rail transit active reverse transmission control system which comprises a control center, a subway energy feedback device, a main transformer substation and N traction transformer substations, and N is larger than or equal to 2. The control center is located in the main substation, and the subway energy feedback device is located in the traction substation. The active power reverse transmission control method comprises the following steps that a control center monitors active power of buses of a section I and a section II of a main substation respectively; if active reverse transmission occurs in a certain section of bus, a subway energy feedback device is controlled to feed back a starting threshold, feedback power is transferred to another section of bus, and the active reverse transmission phenomenon of the section of bus is restrained. By adopting a feedback power transfer mode, loads of the I-section bus and the II-section bus of the main transformer substation are balanc