Uninterrupted power supply system and method with mixture of fuel cell and super capacitor

A technology of supercapacitors and fuel cells, applied in battery circuit devices, power network operating system integration, collectors, etc., can solve problems such as high cost, many power tubes and diodes, and complex control methods, and achieve low cost and high energy The effect of better output characteristics than

Inactive Publication Date: 2018-10-19
KUNMING UNIV OF SCI & TECH
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  • Claims
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Problems solved by technology

[0003] The most common backup power supply for uninterruptible power supply (UPS) is generally battery. The main circuit of current uninterruptible power supply (UPS) has many power tubes and diodes, the cost is high, and the control method is relatively complicated.

Method used

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  • Uninterrupted power supply system and method with mixture of fuel cell and super capacitor
  • Uninterrupted power supply system and method with mixture of fuel cell and super capacitor

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Embodiment 1

[0025] Embodiment 1: An uninterruptible power supply system (UPS) and method for mixing fuel cells and supercapacitors, suitable for uninterruptible power supply systems, providing uninterrupted power for special equipment or systems that require safe, reliable, and continuous power.

[0026] like figure 1 As shown, the uninterruptible power supply system of the hybrid fuel cell and supercapacitor includes mains power 1, power conversion system 2, backup power supply 3 and load 4;

[0027] The power conversion system 2 includes a power factor correction circuit 21, an inverter 22, a battery charger 23 and a DC converter 24; the backup power supply 3 includes a supercapacitor 31, a fuel cell 32 and a switch 33; 1. The output terminals of the power conversion system 2 are respectively connected to the input terminals of the power factor correction circuit 21 and the input terminals of the battery charger 23. The input terminals of the inverter 22 are respectively connected to th...

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Abstract

The invention discloses an uninterrupted power supply system and method with the mixture of a fuel cell and a super capacitor. The system comprises mains supply, a power conversion system, a backup power supply and a load. The fuel cell and the super capacitor are used as a backup power supply, when the mains supply is cut off, the small-capacity long-life supercapacitor can instantaneously supplypower to the load, a condition that the fuel cell directly drives the load to carry out cold start is avoided, the response time of the uninterrupted power supply system is reduced, and the safety and life of the fuel cell are improved. A mature average current mode, constant frequency control and voltage outer loop current inner loop double-closed-loop control are used by an active power factorcorrection circuit, the system has the advantages of a small volume, low power consumption, high efficiency, a high power factor, small total harmonic distortion an high safety and reliability, the uninterrupted power supply for a long time can be ensured, the control of a power tube of the invention is simple to realize, the numbers of diodes and power tubes are small, the cost is low, the efficiency is high, and the safety and reliability are high.

Description

technical field [0001] The invention relates to an uninterrupted power supply system, in particular to an uninterrupted power supply system using a hybrid fuel cell and a supercapacitor as a backup power supply, and belongs to the research field of uninterrupted power supply. Background technique [0002] UPS (Uninterruptable Power System) is called an uninterruptible power supply system. It is an uninterruptible power supply with constant voltage and constant frequency composed of energy storage devices and power converters such as inverters. In the application of various industries, UPS has developed rapidly. The working principle of the uninterruptible power supply (UPS) is: when the mains power supply is normal, the uninterruptible power supply (UPS) supplies the load after the mains voltage is stabilized, and charges the backup power battery in the uninterruptible power supply to keep the backup power supply Sufficient power; when the mains power is cut off or the volt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J9/06H02J7/34
CPCH02J7/345H02J9/062H02J2300/30Y02B70/30Y04S20/20
Inventor 詹跃东朱小清李莉
Owner KUNMING UNIV OF SCI & TECH
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