Capacitor-inverter absorption method for regenerative braking energy of vehicle
A regenerative braking and inverter technology, which is applied to electrical components, circuit devices, and systems for storing electrical energy, can solve problems such as large equipment space and short service life of capacitors, and achieve the effects of improving power quality and reducing conversion losses
Active Publication Date: 2014-12-10
HUNAN HENGXIN ELECTRIC CO LTD
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Problems solved by technology
[0004] Capacitive energy storage equipment has the advantages of fast charging and discharging speed, no loss conversion, no harmonic influence on the power grid, and high power factor.
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[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0027] The embodiment of the invention discloses a vehicle regenerative braking energy capacitor-inverter absorption method, which is energy-saving and environmentally friendly, reduces conversion loss and improves power quality, and can ensure the relative stability of the DC system power supply voltage.
[0028] Such as figure 1 As shown, a capacitor-inverter absorption method for vehicle regenerative braking energy includes:
[0029] S101. Collect...
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The invention discloses a capacitor-inverter absorption method for regenerative braking energy of a vehicle. The capacitor-inverter absorption method comprises the steps as follows: acquiring a first alternating-current voltage and a first direct-current voltage of a power supply network through a sensor; integrating the first alternating-current voltage with a reference voltage to determine a first judgment voltage and a second judgment voltage of equipment input; comparing the first direct-current voltage with the first judgment voltage, and absorbing energy by using a capacitive energy storage absorption unit when the direct-current voltage is higher than the first judgment voltage; acquiring a second direct-current voltage of the power supply network after energy absorption of the capacitive energy storage absorption unit through the collection of the sensor; and comparing the second direct-current voltage with the second judgment voltage, and absorbing the energy by using an inverter feedback absorption unit when the second direct-current voltage is higher than the second judgment voltage. According to the capacitor-inverter absorption method, the energy is saved and the environment is protected; the conversion loss is reduced and the power quality is improved; and the power supply voltage of a direct-current system can be guaranteed to be relatively stable.
Description
technical field [0001] The invention relates to a method for absorbing regenerative braking energy of a vehicle, and more specifically relates to a method for absorbing regenerative braking energy of a vehicle through a capacitor-inverter. Background technique [0002] Generally, urban rail transit vehicles are equipped with regenerative braking, resistance braking and air braking. When the vehicle brakes, it first adopts the regenerative braking method to convert the mechanical energy into electrical energy and return it to the traction network system. If no other vehicle absorbs the electrical energy from regenerative braking at this time, the vehicle can only use resistance braking to regenerate the vehicle. The kinetic energy is converted into heat energy through resistance. The station environment control professional uses tunnel piston exhaust, station rail top exhaust and station rail bottom exhaust to discharge the heat of vehicle resistance braking outside the stat...
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IPC IPC(8): H02J15/00H02J3/38H02J1/00
Inventor 李根良马持跃
Owner HUNAN HENGXIN ELECTRIC CO LTD