Energy feedback type traction power supply device with reactive compensation function and control method thereof

Abstract

The invention discloses an energy feedback type traction power supply device with a reactive compensation function and a control method thereof. The device comprises a dual-split transformer, two high-power bidirectional converters, a direct-current filter inductor and a central control unit, wherein each vice-side winding of the dual-split transformer is connected with one high-power bidirectional converter; direct-current output sides of the two high-power bidirectional converters are connected in series, and the direct-current filter inductor is connected in series between a direct-current positive output and a direct-current contact network of the first high-power bidirectional converter; and the central control unit is connected mutually with the two high-power bidirectional converters through a controller area network (CAN). In the control method, the hierarchical control is adopted, the central control unit is used for calculating an active current instruction and a reactive current instruction, and the two high-power bidirectional converters perform closed loop control on alternating current of the two high-power bidirectional converters according to the active current instruction and the reactive current instruction. The device not only can meet the requirements of traction power supply and braking energy feedback of subway trains, but also has a reactive compensation function used for improving power factors at incoming wires of master substations.

Description

technical field [0001] The invention relates to a traction power supply device and control method for urban rail transit, in particular to a high-power bidirectional converter, which can simultaneously satisfy the traction power supply and regenerative braking energy absorption of trains, and has the reactive power compensation function of the AC medium-voltage power grid A traction power supply device and a control method thereof. Background technique [0002] Urban rail transit can alleviate the increasing congestion of urban traffic, reduce the consumption of fossil fuels, reduce air pollution from vehicle exhaust, achieve energy saving and emission reduction, and promote sustainable urban development. [0003] At present, the traction power supply of urban rail transit still adopts the diode-based power supply device. It is characterized by simple structure and low cost, but the DC voltage is uncontrollable and has a large fluctuation range, which is not conducive to th...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing traction power supply device that the DC voltage fluctuation range is large and the braking energy cannot be fed back, and to provide a system that can feed the braking energy back to the AC grid and has a certain reactive power compensation capability. Feed-type traction power supply device and control method

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