Uninterruptible power supply, power system, control device, and control method

The uninterruptible power supply system addresses battery SoC depletion by adjusting charging and discharging based on frequency deviations and battery state, ensuring stable power supply and system stability through multiple charge/discharge patterns and external control integration.

JP7883473B2Active Publication Date: 2026-07-01KK TOSHIBA
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Patent Information

Application Number
JP2023151721
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2023-09-19
Publication Date
2026-07-01
Estimated Expiration
2043-09-19

AI Technical Summary

Technical Problem

Uninterruptible power supply devices face challenges in maintaining stable power supply to load devices during power outages due to the depletion of battery state of charge (SoC) below the required power supply level, leading to instability in the power system.

Method used

An uninterruptible power supply system equipped with a rechargeable battery, monitoring unit, and control unit that adjusts charging and discharging based on frequency deviations and battery SoC, employing multiple charge/discharge patterns to prevent overcharging or over-discharging, and includes a control device for external integration.

Benefits of technology

Ensures stable power supply to load devices by preventing battery depletion while providing frequency regulation support to the power system, enhancing system stability and efficiency.

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Patent Text Reader

Abstract

To supply stable power to a load device that is connected to a power grid.SOLUTION: An uninterruptible power source device according to the present embodiment can be connected to a power line through which power is supplied from a power grid to a load device, and includes a chargeable / dischargeable storage battery, a monitoring unit that monitors the state of charge of the power storage battery, and a control unit that controls charging / discharging from the storage battery to the power line on the basis of the difference between a first frequency which is the frequency of the power grid and a second frequency which serves as reference for the power grid, and the state of charge of the storage battery.SELECTED DRAWING: Figure 1
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Citation Information

Patent Citations

  • Frequency control method, frequency control device, system and power storage device

    JP2016015875A

  • Projector

    JP2016167015A

  • JPP7218453B

  • Frequency regulation in an ac power supply system

    WO2022233457A1