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Flexible uninterrupted power supply device and control method and system thereof

A power supply device and control system technology, applied in the field of power supply, can solve the problem of high cost of uninterruptible power supply

Pending Publication Date: 2020-06-09
西安西电高压开关有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present application provides a flexible uninterruptible power supply device and its control method and system, which are used to solve the problem of high use cost caused by over-discharge of the current uninterruptible power supply

Method used

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  • Flexible uninterrupted power supply device and control method and system thereof
  • Flexible uninterrupted power supply device and control method and system thereof
  • Flexible uninterrupted power supply device and control method and system thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] figure 1 It is a block diagram of a flexible uninterruptible power supply device according to an embodiment of the present application.

[0054] Such as figure 1As shown, the flexible uninterruptible power supply device provided by this embodiment is used to supply power to electric loads by means of battery packs and renewable resource power generation devices when the power supply of the mains network is abnormal. The device specifically includes a first switch k1 and a second switch k2 , a third switch k3 , an AC bus 10 , a DC bus 20 , a DC-AC converter 30 , a first DC-DC converter 40 , at least one second DC-DC converter 50 and a battery pack 60 .

[0055] One end of the first switch is used to connect to the mains network through a cable, and the other end is connected to the AC busbar, so that the AC power of the mains network is output to the AC busbar, and the electric load is connected to the AC busbar through a corresponding cable. connect.

[0056] In addi...

Embodiment 2

[0067] Figure 4 It is a flow chart of a control method in the embodiment of this application.

[0068] Such as Figure 4 As shown, the control method provided by this embodiment is applied to such as figure 1 The specific method of the shown flexible uninterruptible power supply device includes the following steps:

[0069] S1. Obtain the power supply status of the mains network.

[0070] The power supply status here includes normal power supply and abnormal power supply. Normal power supply means that the mains network can normally transmit power to the flexible uninterruptible power supply in the first embodiment, and abnormal power supply means that it fails to supply power due to a power failure. Acquiring the power supply state of the mains network here may be detecting the voltage of the mains network through a corresponding detection device, or obtaining power supply status information of a transformer or substation upstream of the mains network through a data netwo...

Embodiment 3

[0078] Figure 5 It is a flow chart of another control method in the embodiment of the present application.

[0079] Such as Figure 5 As shown, the control method provided by this embodiment is applied to such as figure 1 The specific method of the shown flexible uninterruptible power supply device includes the following steps:

[0080] S1. Obtain the power supply status of the mains network.

[0081] The power supply status here includes normal power supply and abnormal power supply. Normal power supply means that the mains network can normally transmit power to the flexible uninterruptible power supply in the first embodiment, and abnormal power supply means that it fails to supply power due to a power failure. Acquiring the power supply state of the mains network here may be detecting the voltage of the mains network through a corresponding detection device, or obtaining power supply status information of a transformer or substation upstream of the mains network through...

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Abstract

The invention discloses a flexible uninterruptible power supply device, which comprises an AC bus, a DC bus, a first switch, a DC-AC converter, a storage battery pack, a first DC-DC converter, at least one second DC-DC converter, a second switch and a third switch. One end of the first switch is connected with a mains power network, and the other end is connected with the AC bus. Two ends of the DC-AC converter are electrically connected with the DC bus and the AC bus respectively; the input end of the first DC-DC converter is electrically connected with the storage battery pack through the second switch, and the output end is electrically connected with the DC bus; the input end of the second DC-DC converter is used for connecting a renewable resource power generation device, and the output end is electrically connected with the DC bus. One end of the third switch is electrically connected with the AC bus, and the other end is electrically connected with an internal-combustion enginegenerator. And the storage battery pack only supplies power to the electrical load within limited time, so that the purpose of protecting the storage battery pack is achieved, and the use cost is reduced.

Description

technical field [0001] The present application relates to the field of power supply technology, and more specifically, to a flexible uninterruptible power supply device and its control method and system. Background technique [0002] UPS (Uninterruptible Power Supply, uninterruptible power supply), as one of the commonly used devices for backup power supply of important loads, has the characteristics of simple topology and single power supply, and has a wide application market, widely used in data centers, medical equipment, substations Secondary protection equipment, railway core equipment and other important loads. [0003] UPS generally consists of a battery pack, an inverter and a control circuit; one end of it is connected to the distribution network, and the other end is connected to an electrical load. When the grid voltage is normal, the UPS uses the grid power to charge its own battery pack. When the grid is abnormal, The UPS releases the electric energy of the bat...

Claims

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Application Information

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IPC IPC(8): H02J9/08H02J7/00
CPCH02J9/08H02J9/061H02J7/0029H02J7/0068Y02B10/70
Inventor 金猛曾林翠白世军李毅陈凯马亮贾乐孔庆霞
Owner 西安西电高压开关有限责任公司
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