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Device and method for comprehensive recovery and utilization of rail transit regenerative braking energy

A technology of regenerative braking and rail transportation, which is applied in the direction of vehicle energy devices, sustainable transportation, transportation and packaging, etc. It can solve problems such as the inability to realize action logic, so as to avoid the automatic failure of regeneration, avoid the decline of power quality, and reduce costs Effect

Active Publication Date: 2019-12-03
DUNSHI MAGNETIC ENERGY TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Therefore, the correct action logic cannot be realized only by determining the action logic of the energy storage unit and the inverter device based on the level of the DC bus voltage.

Method used

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  • Device and method for comprehensive recovery and utilization of rail transit regenerative braking energy
  • Device and method for comprehensive recovery and utilization of rail transit regenerative braking energy
  • Device and method for comprehensive recovery and utilization of rail transit regenerative braking energy

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Embodiment Construction

[0020] The present invention will be further described through the embodiments below in conjunction with the accompanying drawings.

[0021] see figure 1 , a rail transit regenerative braking energy comprehensive recycling device, consisting of 10 / 35KV AC power supply network, AC voltage detection module, 750VDC / 1500VDC traction network DC bus, DC voltage detection module, traction transformer, diode rectifier, logic control unit, Composed of flywheel energy storage system, inverter, grid-connected switch, step-up transformer, and low-voltage AC power supply network, the 10 / 35KV AC power supply network is electrically connected to the DC busbar of the 750VDC / 1500VDC traction network through traction transformers and diode rectifiers, and is the DC bus of the traction network. The busbar provides energy.

[0022] A DC voltage detection module is installed between the DC bus of the 750VDC / 1500VDC traction network and the logic control unit. The DC voltage detection module detec...

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Abstract

The invention relates to a rail-traffic regenerative-braking-energy comprehensive recovery and utilization device and method. The rail-traffic regenerative-braking-energy comprehensive recovery and utilization device is provided with an alternating voltage detecting module, a direct voltage detecting module, a logical control unit, a flywheel energy storage system and an inverter. The flywheel energy storage system conducts action to provide electric energy for or absorb electric energy from a traction network direct current bus according to the magnitude of a traction network direct current bus voltage value and a self SOC value state; and the inverter determines whether traction network direct current bus voltage is absorbed or not by combining the magnitude of the traction network direct current bus voltage value and the SOC state of the flywheel, if the feedback power of the inverter is relatively small, the power is fed back to a low-voltage alternating-current power supply network, and if the feedback power of the inverter is relatively large, the power is fed back to a power distribution network. According to the rail-traffic regenerative-braking-energy comprehensive recovery and utilization device and method, the quality of power-grid electric energy is prevented from being reduced after an inverter feedback device is used, by combining the infinite-capacity continuous working characteristic of the flywheel energy storage system, a part of energy which cannot be absorbed by the flywheel energy storage system after the flywheel energy storage system is fully charged is absorbed, rail-traffic train regeneration is prevented from automatically losing efficacy, and energy conservation is obvious.

Description

technical field [0001] The invention relates to a device and method for comprehensively recovering and utilizing regenerative braking energy of rail transit, and belongs to the technical field of energy saving of rail transit systems. Background technique [0002] The braking energy of a train in the field of rail transit accounts for about 20% to 50% of the traction energy of the train running. In addition to part of the braking energy being absorbed by neighboring vehicles, braking resistors were used to absorb the remaining regenerative braking energy in the early days, so that the energy was wasted, and the temperature rise caused by the resistance energy consumption will increase the temperature of the tunnel and increase the temperature of the inner ring of the subway. The load of the control system. At present, the technology of medium-voltage inverter products tends to be mature and stable, and many domestic subway lines are being applied to the grid. The medium-vol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B61D43/00H02J3/38H02J3/28
CPCB61D43/00H02J3/28H02J3/38Y02T30/00
Inventor 赵思锋唐英伟温海平李胜飞朱文元米海涛张建平于金龙
Owner DUNSHI MAGNETIC ENERGY TECH
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