An online interactive ups circuit

Abstract

The invention relates to an online interactive UPS circuit, and belongs to the field of power supplies. The online interactive UPS circuit comprises an energy storage unit, an isolation transformer, an alternative current input / output switch, a smart rapid switch, an input electric reactor, a static / maintenance bypass switch and a central control system; the static bypass switch is connected in parallel with the maintenance bypass switch, and one end is connected to a power grid, the other end is connected with a load; the smart rapid switch input end is connected to the power grid through thealternative-current input switch; one end of the input electric reactor is connected with the smart rapid switch, and the other end is connected to the load through the output switch; a high-voltageend of the isolation transformer is connected to the power grid between the electric reactor and the output switch; a low-voltage end of the isolation transformer is connected with an energy storage unit; a central control system is used for controlling the power grid event, and disconnecting the load and the failure alternative-current input. Through adoption of the online interactive UPS circuit, grid-connection working condition and off-grid working condition can be switched seamlessly, the load is supplied with power continuously, so that the integral efficiency of the UPS device is improved.

Description

technical field [0001] The invention belongs to the field of power supply and relates to an online interactive UPS circuit. Background technique [0002] Nowadays, due to the vigorous construction and use of key industries such as data centers and chip factories, the power quality of the public grid cannot fully guarantee the stable and uninterrupted operation of its important loads. Once the power supply system fails, it will cause immeasurable economic losses. Therefore, the industry urgently seeks a stable, high-performance uninterruptible power supply (UPS). [0003] Most of the traditional UPS circuits on the market are online or backup topology. The rectification and inverter links of the online UPS are always connected in series between the power grid and the load to run at full power. The overall efficiency of the system is low, resulting in a certain degree of energy waste. The environment is not friendly; and the backup UPS cannot provide uninterrupted power suppl...

AI Technical Summary

Problems solved by technology

[0003] Most of the traditional UPS circuits on the market are online or backup topology. The rectification and inverter links of the online UPS are always connected in series between the power grid and the load to run at full power. The overall efficiency of the system is low, resulting in a certain degree of energy waste. The environment is not friendly; and the backup UPS cannot provide uninterrupted power supply for the load

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