Method for controlling uninterruptible power supply
A technology of power supply and power grid, which is applied in the direction of emergency power arrangement, conversion equipment for intermediate conversion to DC conversion, irreversible conversion of AC power input to DC power output, etc.
Pending Publication Date: 2022-03-29
ABB (SCHWEIZ) AG
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- Claims
- Application Information
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Problems solved by technology
In the event of an electrical failure of a load connected to the UPS, the energy storage device and inverter may have to power an overload greater than the rated load for a predetermined period of time
Method used
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Embodiment Construction
[0032] figure 1 An uninterruptible power supply 100 according to an embodiment is schematically shown. The grid connection 102 of the uninterruptible power supply 100 is connected to the grid switch 104 of the uninterruptible power supply 100 . Grid switch 104 is a mechanical switch. The rectifier 106 of the uninterruptible power supply 100 and the inverter 108 of the uninterruptible power supply 100 are interconnected via a DC link 110 . Energy storage device 112 of uninterruptible power supply 100 is connected to DC link 110 . Energy storage device 112 may include a battery converter. The load connection 114 of the uninterruptible power supply 100 is connected to the inverter 108 . A bypass switch 116 of uninterruptible power supply 100 is connected in parallel with rectifier 106 , DC link 110 and inverter 108 between grid switch 104 and load connection 114 . The bypass switch 116 is a semiconductor switch. Grid connection 102 , bypass switch 116 and load connection 11...
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The embodiment of the invention relates to a method for controlling an uninterruptible power supply. The uninterruptible power supply includes a grid connection, a grid switch connected to the grid connection, a rectifier and an inverter connected to each other via a DC link, an energy storage device connected to the DC link, a load connection to which the inverter is connected, and a bypass switch connected in parallel with the rectifier, the DC link and the inverter between the grid switch and the load connection; the power grid switch is a mechanical switch, and the bypass switch is a semiconductor switch; the method includes: in a normal operation mode, operating a rectifier in a rectification mode, operating an inverter to convert a DC current from a DC link to an AC current supplied to a load; receiving the fault signal, sending a disconnection signal to the power grid switch to disconnect the power grid switch, and disconnecting the uninterruptible power supply from the power grid; upon receiving a confirmation signal from the grid switch, a closing signal is transmitted to the bypass switch and a mode change signal is transmitted to the rectifier to operate the rectifier in an inversion mode.
Description
technical field [0001] The invention relates to a method and a corresponding computer program for controlling an uninterruptible power supply. In particular, the present invention relates to a control device for controlling an uninterruptible power supply and an uninterruptible power supply having such a control device. Background technique [0002] In the event of a power failure in the grid connected to the UPS, the UPS's energy storage device and inverter are designed to power the rated load for a predetermined period of time. In the event of an electrical failure of a load connected to the UPS, the energy storage device and inverter may have to power an overload greater than the rated load for a predetermined period of time. The electrical and electronic components of an UPS must be sized larger than required for the rated load in order to withstand the thermal stress caused by the overload. Contents of the invention [0003] It is an object of the present invention ...
Claims
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IPC IPC(8): H02J9/06H02J3/36H02M5/40
CPCH02J9/068H02J9/062H02J3/36H02M5/40H02J2310/10H02H7/1227H02J3/46H02J9/061H02M7/08H02M7/493
Inventor 西尔维奥·克洛比安德里亚·曼努奇尼
Owner ABB (SCHWEIZ) AG