Power supply system and power supply method for urban rail vehicles
A technology for urban rail vehicles and power supply systems, applied in the field of rail transit, can solve problems such as low utilization rate of renewable energy consumption, increased operating costs, and weak response capabilities, and achieve high utilization rate of renewable energy consumption, high work reliability, The effect of low running cost
Active Publication Date: 2018-05-29
ZHUZHOU ELECTRIC LOCOMOTIVE CO +1
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Problems solved by technology
[0003] Although the supercapacitor charges and discharges quickly, it has less energy storage. Therefore, the urban rail vehicle powered by a single supercapacitor has poor battery life, and the vehicle's ability to cope with complex road conditions (traffic jams, waiting for red lights, etc.) is not strong, and the work is reliable. low performance; the vehicle cannot fully absorb the regenerative braking energy generated on long downhill slopes, the utilization rate of regenerative energy is low, and the operating cost is increased
Method used
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[0020] Such as figure 1 As shown, the urban rail vehicle power supply system includes a supercapacitor 1, and the voltage input terminal of the supercapacitor 1 is connected to a power supply unit, wherein the power supply unit includes a station charging unit 8 and a traction regenerative braking unit 9, and also includes a DC / DC bidirectional charger 2, Pseudocapacitor 3, the first voltage sensor 4 and the first current sensor 5, the detection terminal of the first voltage sensor 4 and the detection terminal of the first current sensor 5 are all connected with the supercapacitor 1, the output terminal of the first voltage sensor 4 and the first The output terminals of a current sensor 5 are all connected to the bidirectional charger 2, and the power supply unit, the supercapacitor 1, the pseudocapacitor 3, the first voltage sensor 4 and the first current sensor 5 are all connected to the bidirectional charger 2; wherein, the first current The sensor 5 is used to detect the c...
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The invention discloses a power supply system and power supply method for urban rail vehicles. The power supply system comprises a super capacitor, a two-way battery charger, a pseudocapacitor, a first voltage transducer and a first electric current transducer; the super-capacitor is connected with a power supply unit; detecting ends of the first voltage transducer and the first electric current transducer are both connected with the super capacitor; output ends of the first voltage transducer and the first electric current transducer are both connected with the two-way battery charger; the power supply unit, the super capacitor, the pseudocapacitor, the first voltage transducer, and the first electric current transducer are all connected with the two-way battery charger; the super capacitor absorbs electricity or supplies electricity to the vehicles when the two-way battery charger is in standby; the power supply unit charges the pseudocapacitor when the two-way battery charger operates in a buck charging mode; and the super capacitor absorbs the power supplied by the pseudocapacitor when the two-way battery charger works in a boost charging mode. The power supply system and powersupply method for the urban rail vehicles use the super capacitor and the pseudocapacitor for mixed power supply, the cruising ability is high, the working reliability is high, the use ratio of regeneration energy is high, and the running cost is low.
Description
technical field [0001] The invention belongs to the technical field of rail transit, and in particular relates to a power supply system and a power supply method for urban rail vehicles. Background technique [0002] At present, the vast majority of urban rail vehicles at home and abroad are powered by one of catenary, contact rail, lithium battery, super capacitor, and lithium carbonate battery, and the energy storage and power supply forms are relatively simple. For urban rail vehicles powered solely by supercapacitors, the voltage input terminal of supercapacitors is connected to a power supply unit, where the power supply unit includes a station charging unit or a traction regenerative braking unit. When the vehicle enters the station, the platform charging unit is connected to the voltage input terminal of the supercapacitor, and the platform charging unit uses a large current to quickly charge the supercapacitor by using the station stop time of passengers getting on a...
Claims
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Patent Timeline
Login to View More IPC IPC(8): B60L11/18B60L7/10
CPCB60L7/10B60L53/00B60L2200/26Y02T10/70Y02T10/7072Y02T10/92Y02T90/14
Inventor 聂文斌柳晓峰朱伟健张宇尚江傲周利
Owner ZHUZHOU ELECTRIC LOCOMOTIVE CO