Power uninterruptible power supply (UPS) system based on super-capacitor and energy storage method thereof

Abstract

The invention discloses a power UPS system based on a super-capacitor. The power UPS system comprises a rectifier, an inverter, a bidirectional direct current (DC)/DC converter and an energy storage system. The energy storage system is composed of a super-capacitor group, a super-capacitor equalization circuit and a super-capacitor management system (CMS). The rectifier is used for converting input distribution alternating voltages into high-voltage direct voltages and provides a power supply for the inverter; the inverter is used for converting the high-voltage direct voltages at the front end into alternating voltages meeting load use requirements; and the rectifier performs charge or floating charge on the energy storage system through the bidirectional DC/DC converter. The power UPS system based on the super-capacitor uses the super-capacitor as an energy storage unit, and compensates for electrical energy gaps caused by power equipment during the power shaking of power grids through an online parallel hot spare mode. The power UPS system based on the super-capacitor can work normally at a low temperature (an ultimate temperature minus 40 DEG C), has the advantages of being small in size, free of maintain, long in service life, high in power and reliability and the like and can meet instantaneous power supply requirements of large power.

Description

technical field [0001] The invention relates to an on-line power uninterruptible power supply device, in particular to an on-line AC and DC power uninterruptible power supply system. Background technique [0002] Modern industrial production has higher and higher requirements on the quality of electricity, from continuous power supply to stable voltage and frequency power supply, from improving power factor to anti-electromagnetic interference. With the increasing power consumption of users, a large number of modern control methods are constantly being used, such as: frequency conversion speed regulator, IGBT, etc. These modern methods are very sensitive to the state of the instantaneous power grid, and do not allow the power supply voltage to drop significantly. Unexpected termination of some key equipment is fatal to a production enterprise in continuous operation, in addition to causing serious economic losses, and sometimes even causing major safety accidents. For examp...

AI Technical Summary

Problems solved by technology

The energy storage system using the battery as a backup power source can solve the unexpected termination or "shocking" phenomenon of key equipment, but in practical applications, the life of the battery is seriously attenuated, and the maintenance cost is high. In addition, it is greatly affected by the ambient temperature.

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