Tramcar-mounted super capacitor control method
A super capacitor and tram technology, applied in the field of rail transit, can solve problems such as poor safety
Pending Publication Date: 2021-06-01
CRRC QINGDAO SIFANG ROLLING STOCK RES INST
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Problems solved by technology
[0003] The present invention aims at the above-mentioned problems in the prior art, such as the poor safety caused by the pressure difference of different supercapacitor boxes, and provides a method for controlling the on-board supercapacitor of a tram, which can comprehensively consider the pressure difference and fault status of different supercapacitor boxes and other factors, the closed and disconnected control capacitors are charged and discharged under appropriate timing, which improves the safety, comfort and reliability of the train
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[0044] In the following, the present invention will be specifically described through exemplary embodiments. It should be understood, however, that elements, structures and characteristics of one embodiment may be beneficially incorporated in other embodiments without further recitation.
[0045] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner" and "outer" are based on the The positional relationship is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and should not be understood as indicating or implyin...
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The invention relates to a tramcar-mounted super capacitor control method and device. The control method comprises the steps of judging whether a vehicle is in an emergency traction working condition or not according to the real-time detection of the voltages of N (N>=3) capacitor boxes and the switching state of an emergency traction mode, if the vehicle is in a normal working condition, the VCU controls a capacitor contactor of the capacitor box to be connected with the grid to perform grid connection according to whether the difference value between the voltage value of the current capacitor box to be connected with the grid and the grid connection voltage of the capacitor box with the closed capacitor contactor is less than a set voltage difference value Uc or not, and if the vehicle is in an emergency traction mode, the CECU controls the capacitor contactor of the capacitor box to be connected with the grid to perform grid connection according to whether the difference value between the voltage value of the current capacitor box to be connected with the grid and the grid connection voltage of the capacitor box with the closed capacitor contactor is less than a set voltage difference value Uc or not. According to the invention, factors such as voltage differences and fault states of different super capacitor boxes can be comprehensively considered, charging and discharging of the capacitors are controlled by closing and opening under a proper time sequence, and the safety, comfort and reliability of a train are improved.
Description
technical field [0001] The invention belongs to the technical field of rail transit, and relates to a rail vehicle network control technology, in particular to a method for controlling a supercapacitor on board a tram. Background technique [0002] Modern trams have the advantages of low construction cost, short construction period, and low energy consumption. They are currently the main means to solve the problem of medium and low traffic volume in large and medium-sized cities. In addition to the traditional catenary power supply, energy storage trams, as a new type of urban rail transit, generally use supercapacitors as energy storage media. The bow will be powered up. Energy storage-type trams are generally equipped with multiple supercapacitor boxes without a car, and are connected to the grid by controlling the capacitor contactors in the capacitor boxes during operation. In the existing control strategy, because the pressure difference between the capacitor boxes wi...
Claims
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IPC IPC(8): H02J3/38H02J7/34H02H7/16
CPCH02J3/38H02J7/345H02H7/16
Inventor 李然殷培强阎士奇李文正王曙李德祥
Owner CRRC QINGDAO SIFANG ROLLING STOCK RES INST