Rail transit flexible power supply device and coordination control method

Abstract

The invention discloses a rail transit flexible power supply device and a coordination control method. The method comprises the steps: respectively collecting the voltage and current of a load at an outlet of a transformer substation at an alternating-current side and a direct-current side, calculating the instantaneous power of the load, and obtaining a system working condition in a corresponding mode, obtaining power values of each link, such as power transmitted from an alternating-current side contact network to an intermediate direct-current link, power transmitted from the intermediate direct-current link to a direct-current side contact network, power of an energy feedback system, power of a hybrid energy storage unit and the like, calculating a reference current of each converter based on each power, and obtaining the reference current of an alternating-current side contact network converter, the reference current of a hybrid energy storage system unit converter, the reference current of a direct-current side contact network converter and the reference current of an energy feedback system side converter, and controlling each converter. According to the invention, the regenerative braking energy is fully utilized, energy between alternating-current power supply and direct-current power supply is directly communicated, and the advantages of being convenient, safe, environmentally friendly, wide in application range, high in response speed and the like are achieved.

Description

technical field [0001] The invention belongs to the technical field of rail transit power supply, and in particular relates to a rail transit flexible power supply device and a coordinated control method. Background technique [0002] At present, the AC and DC dual-system traction power supply mode for urban rail transit is still blank in China, which represents the development direction of interconnection between urban rail transit systems and urban railways, and has a very broad application prospect. Studying the key technologies of AC and DC dual-system traction power supply is not only the core technology necessary to complete the current production tasks, but also represents the key direction of future design and market development, and has important engineering significance and market value. [0003] Taking the Chongqing River Jump Line as an example, the line is located in the southwest of Chongqing City, from east to west, connecting the urban rail transit Line 5, Br...

AI Technical Summary

Problems solved by technology

The application of battery energy storage, supercapacitor energy storage, flywheel energy storage and other technologies in the field of rail transit has been widely studied, but the ground regenerative braking energy utilization system applied to the dual-current traction power supply system is still blank, and due to the dual-current system There is a phase separation section between the DC system and the AC system, and the energy between the DC line and the AC line cannot be directly transmitted, resulting in that the regenerative braking energy on one side cannot be utilized by the other side

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