Energy reversible traction substation, method and system

Abstract

The invention provides an energy reversible traction substation, method and system. The energy reversible traction substation comprises a four-quadrant converter unit, a controller and a direct-current sensor. The four-quadrant converter unit is respectively connected with an alternating-current power grid and a direct-current contact network; the direct-current sensor is connected with the direct-current side of the four-quadrant converter unit and also connected with the controller; the controller is connected with the four-quadrant converter unit. The direct-current sensor is used for measuring and transmitting direct-current side current of the four-quadrant converter unit to the controller; the controller is used for controlling a direct-current voltage given value of the four-quadrant converter unit to change along with the change of the direct-current side current according to specific rules. The energy reversible traction substation, the method and the system provided by the invention have the benefits that a plurality of energy reversible traction substations can commonly absorb train regenerative braking energy, the power impact on the single traction substation is reduced, and the energy utilization rate is improved.

Description

technical field [0001] The invention relates to the technical field of rail transit traction power supply, in particular to an energy reversible traction substation, method and system. Background technique [0002] Urban rail transit has increasingly become the first choice to solve urban congestion problems due to its advantages of safety and comfort, large passenger capacity, fast operation speed, energy saving and environmental protection. Therefore, urban rail transit has developed rapidly in most areas. [0003] figure 1 The structural representation of the existing urban rail transit traction power supply system provided by the present invention, as figure 1 As shown, the urban rail transit traction power supply system includes an AC power grid, a DC catenary, and multiple traction substations. Each traction substation includes a diode rectifier unit. The diode rectifier unit has a simple structure and reliable performance. [0004] However, diode rectifier units ca...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides an energy-reversible traction substation, method and system to solve the problem that train regenerative braking energy is wasted on resistors in the existing urban rail transit traction power supply system, and at the same time ensure that the regenerative braking energy of trains is consumed by multiple Common absorption of traction substations to improve energy utilization

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