Double-energy-source uninterruptible power supply device and method thereof

Abstract

The invention discloses a double-energy-source uninterruptible power supply device and a method of the double-energy uninterruptible power supply device. A power grid and a natural gas pipeline in the device are provided with independent public infrastructure facilities, and supply two independent input energy sources to the device. A battery or a super-capacitor serves as an energy storage unit. Meanwhile, the device comprises a static switch, a grid-side rectifier, a fuel gas generator, a fuel gas rectifier, an energy storage unit bidirectional DC converter, an inverter and a load. The power grid and the fuel gas generator serve as standby of each other, and supply energy to the load independently. The power grid serves as the main energy source to supply power to the load when normal. When the power grid breaks down, natural gas serves as the main energy source, and the fuel gas generator supplies power to the load. The reliability of power supply to the load is improved through the two energy sources with the independent public infrastructure facilities. The energy storage unit only needs to supply power to the load for a short time in the starting process of the fuel gas generator, and therefore the capacity of the energy storage unit can be lowered effectively.

Description

technical field [0001] The invention relates to a dual-energy uninterruptible power supply device and a method thereof. The dual-energy uninterruptible power supply device has two independent public infrastructures. Background technique [0002] Uninterruptible power supply devices have been widely used in important loads such as hospitals, data centers, and transportation hubs. The interruption of power supply in these systems will cause major economic losses and even casualties. The traditional uninterruptible power supply device uses the grid as the input energy, and the battery pack as the energy storage unit. When natural disasters such as tsunami and typhoon occur, the power transmission line may fail and be in a state of paralysis for a long time. At this time, due to the singleness of input energy, the traditional uninterruptible power supply device can only rely on the energy storage unit as the load for a short time. Energy supply cannot guarantee continuous and h...

AI Technical Summary

Problems solved by technology

When natural disasters such as tsunami and typhoon occur, the power transmission line may fail and be in a state of paralysis for a long time. At this time, due to the singleness of the input energy, the traditional uninterruptible power supply device can only rely on the energy storage unit as the load for a short time. Energy supply, unable to guarantee continuous and highly reliable power supply for important loads, key departments, etc.

In order to extend the backup power supply time, it is necessary to increase the capacity of the energy storage unit, but at the same time it leads to an increase in investment and maintenance costs

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