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Distributed power distribution method for fuel battery-super capacitor hybrid power supply system

A super capacitor and fuel cell technology, applied in the field of hybrid power supply system and hybrid energy storage system, can solve the problems of bus voltage deviation, super capacitor state of charge recovery and other problems

Active Publication Date: 2017-10-24
CHONGQING UNIV
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  • Application Information

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Problems solved by technology

[0009] In view of this, the object of the present invention is a decentralized power distribution method of a fuel cell-supercapacitor hybrid power supply system, to solve the decentralized control of dynamic power optimization distribution and bus voltage deviation in the fuel cell-supercapacitor hybrid power supply system. And technical issues such as supercapacitor state of charge recovery and overcharge and overdischarge protection

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  • Distributed power distribution method for fuel battery-super capacitor hybrid power supply system
  • Distributed power distribution method for fuel battery-super capacitor hybrid power supply system
  • Distributed power distribution method for fuel battery-super capacitor hybrid power supply system

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Embodiment Construction

[0082] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0083] In this embodiment, the simplified circuit of the fuel cell-supercapacitor hybrid power supply system is as follows Figure 8 shown. The rated output power of the fuel cell is 12kW, the rated output voltage is 90V, and the fluctuation range of the output voltage is 74V ~ 130V; the rated voltage of the super capacitor is 96V, and the capacitance value is 100F; the nominal value of the DC bus voltage is 270V; the fuel cell The switching frequency of the DC / DC converter and the supercapacitor DC / DC converter is 10kHz, and the inductance L 1 and L 2 Both are 2mH, capacitance C 1 and C 2 Both are 470uF; the switching frequency of the unloading circuit is 10kHz, and the unloading resistor R 2 is 2Ω. In this embodiment, the high-frequency pulsating component of the load power is required to be provided by the supercapacitor, and the low-frequency ...

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Abstract

The invention discloses a distributed power distribution method for a fuel battery-super capacitor hybrid power supply system. The method comprises the steps of S1, building the fuel battery-super capacitor hybrid power supply system; S2, designing a controller to control the fuel battery-super capacitor hybrid power supply system; and S3, setting a control parameter for the fuel battery-super capacitor hybrid power supply system so as to achieve distributed dynamic power distribution. The distributed power distribution method for the fuel battery-super capacitor hybrid power supply system provided by the invention can achieve dynamic optimized distribution of pulse load power of the fuel battery-super capacitor hybrid power supply system among different power supply units, high frequency power pulse is provided by the super capacitor, and low frequency graded power is provided by the fuel battery; furthermore, automatic recovery of the bus voltage and the charge state of the super capacitor can also be achieved under a steady state. In addition, overcharging and overdischarging protection of the super capacitor can also be achieved to ensure that the super capacitor works in a normal working area.

Description

technical field [0001] The invention relates to the technical fields of hybrid energy storage systems and hybrid power supply systems, in particular to a decentralized power distribution method for hybrid power supply systems. Background technique [0002] With the increasing global energy crisis and increasingly prominent environmental pollution problems, clean, green and efficient renewable energy power generation technologies have been developed rapidly. Because fuel cells have the advantages of cleanliness, high efficiency, high power density, low noise, and flexible configuration, replacing traditional power generation units with fuel cells has become one of the main measures to solve the problems of low efficiency, high fuel consumption, high noise, and high pollution in traditional internal combustion engine power generation systems. one. Since the load curves of a large number of new electrified loads in modern electrical systems (such as multi-electric aircraft, el...

Claims

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Application Information

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IPC IPC(8): H02J3/28H02J3/46
CPCH02J3/28H02J3/46
Inventor 陈家伟宋清超
Owner CHONGQING UNIV
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