Regenerative braking energy storage coordination control method and system

Abstract

The invention discloses a regenerative braking energy storage coordination control method. The method comprises the steps: acquiring a coordination control request of a regenerative braking energy capacitor energy storage device in a traction station to be subjected to coordination control; judging the capacitance state of a regenerative braking energy capacitance energy storage device in a traction station adjacent to a traction station to be coordinated and controlled, and carrying out power support on the traction station to be coordinated and controlled according to the capacitance energy storage state of the regenerative braking energy capacitance energy storage device. When a regenerative braking energy capacitor energy storage device of a certain station is out of operation or reaches the maximum absorption power due to faults and maintenance, the control system of the capacitance energy storage device of the station transmits the quit or full power information of the device to the capacitance energy storage device of the adjacent station through the inter-station connection optical fiber, power support is carried out, the direct current network voltage is stabilized to the maximum extent, and the starting probability of a vehicle-mounted resistor and a brake shoe is reduced.

Description

technical field [0001] The invention belongs to the technical field of regenerative braking, and in particular relates to a regenerative braking energy storage coordination control method and system. Background technique [0002] During the operation of urban rail transit, due to its heavy weight and fast driving speed, frequent braking will generate a large amount of braking energy. If this part of braking energy is not absorbed and utilized, it will cause a rapid increase in the DC catenary voltage , threatening the safety of rail transit operation. At present, urban rail transit at home and abroad mostly consumes braking energy by installing resistance absorbing devices. This scheme converts braking energy into heat energy and consumes it, and the energy has not been effectively utilized. The braking energy capacitor energy storage device can increase or decrease the DC voltage to a controllable range through the converter and store it in the super capacitor, so as to ab...

AI Technical Summary

Problems solved by technology

[0003] In the actual operation of urban rail transit lines, since the braking energy is affected by parameters such as vehicle running speed, passenger capacity and row density, the braking energy that different traction stations can absorb is not the same, but most of the actual engineering design configurations Capacitive energy storage devices with the same capacity, so the power output of the devices of different traction stations is unbalanced and uncoordinated, that is, some devices have insufficient capacity to absorb braking energy, and some devices still have remaining capacity

On the other hand, since the energy storage device used in the braking energy capacitive energy storage device is a supercapacitor (electric double layer capacitor), if only the magnitude of the braking energy is obtained through simulation in the design stage and the equipment capacity is configured accordingly, the redundant capacity larger

In addition, if the up and down trains enter the station at the same time or the equipment of a certain station is out of operation due to failure or maintenance, the cost of equipment configuration will be higher

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