Regenerative energy recovery system and control method based on flywheel energy storage and resistance braking
A flywheel energy storage and regenerative energy technology, applied in electric braking systems, railway braking systems, brakes for special railway systems, etc., can solve the problem of regenerative braking energy recovery and utilization, low operation and maintenance costs, and achieve Optimum and other issues, to achieve good overall economic and energy-saving effects, improve system economic benefits, and facilitate construction and operation and maintenance
Active Publication Date: 2019-02-19
WEIKONG PHYSICAL ENERGY STORAGE R&D SHENZHEN CO LTD
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Problems solved by technology
The main problem of this method is that it does not save energy, but because of its mature technology, simplicity and reliability, and low cost, it has been applied in many domestic subway lines
In terms of resistance energy-consuming technical solutions, constant-voltage resistance absorbing devices are mainly used in China at present. The disadvantages of this solution are: the regenerative braking energy is dissipated in the form of heat energy, no recycling is performed, and no energy is saved; regenerative braking The energy is concentrated on the absorbing resistor for heat consumption, which leads to an increase in the ambient temperature of the equipment space where the resistor cabinet is placed. Measures must also be taken to ensure sufficient ventilation to dissipate heat, which increases additional energy consumption.
The flywheel energy storage device has a long service life and low operation and maintenance costs; the regenerative energy is directly converted in the DC system without affecting the AC system, with high energy utilization efficiency and good energy-saving effect, but the initial investment cost is relatively high
[0005] In order to solve the problem of recovery and utilization of regenerative braking energy in rail transit, it is difficult to achieve the best technical performance and economic indicators at the same time only by a single product
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[0030] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.
[0031] In order to make the description of the present disclosure more detailed and complete, the following provides an illustrative description for the embodiments and specific examples of the present invention; this is not the only way to implement or use the specific embodiments of the present invention. The implementation manners cover the features of multiple specific embodiments, and the method steps and sequences used to construct and operate these specific embodiments. However, other specific embodiments can also be used to achieve the same or equal functions and sequence of ...
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The invention relates to the technical field of regenerative energy recovery for urban rail transit, in particular to a regenerative energy recovery system based on flywheel energy storage and resistance braking, which comprises at least one flywheel energy storage feedback device, at least one resistance absorption device and a voltage sensor, in this system, the resistance absorption device andthe flywheel energy storage feedback device coordinate with each other, and the flywheel energy storage feedback dominates and the resistance absorption is auxiliary. The regenerative energy can be fully utilized, the energy is saved and the emission is reduced, the overall investment is saved, the economic benefit of the system is improved, the overall economy and energy-saving effect of the system is better than that of a single resistance absorption device or flywheel energy storage feedback device. The invention also provides a control method of the system, the flywheel energy storage feedback device and the resistance absorption device are decoupled in the control, which does not depend on mutual communication, the complexity of the system control is reduced, and the system has the advantages of expansibility, convenient construction and operation and maintenance.
Description
Technical field [0001] The invention relates to the technical field of regenerative energy recovery of urban rail transit, in particular to a regenerative energy recovery system and control method based on flywheel energy storage and resistance braking. Background technique [0002] With the rapid development of my country's urban rail transit construction, rail train transmission control technology has also made significant progress. Basically, urban rail transit has adopted the AC variable frequency voltage regulation (VVVF) speed regulation system and adopts the method of regenerative braking. The biggest advantage of regenerative braking is energy saving. The regenerative braking energy is fed back to the traction grid for use by adjacent trains. The regenerative braking energy produced by trains every year is very considerable. According to statistics, some traction grid regenerative braking energy accounts for about 30% of the total train traction power, but the regenerati...
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IPC IPC(8): B61H9/06B60L7/10B61D43/00
CPCB60L7/10B61D43/00B61H9/06Y02T10/72Y02T30/00Y02T90/16
Inventor 江卫良张庆源陈烨郑琦葛自强
Owner WEIKONG PHYSICAL ENERGY STORAGE R&D SHENZHEN CO LTD