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UPS parallel system and counter synchronization signal receiving method

A technology for synchronizing signals and receiving methods, applied in the field of control, can solve the problems of inconsistent output power, the same power-on time, and it is difficult to chop the same count value of the counter, so as to improve the stability of the power supply, improve the consistency, and reduce the high voltage. The effect of frequency circulation

Active Publication Date: 2015-12-02
VERTIV CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practical applications, since it is difficult to ensure that the power-on time of multiple UPSs connected in parallel is the same, it is also difficult to ensure that the counting values ​​of the chopper counters in the control units of multiple UPSs connected in parallel are the same, that is, the inverter unit can It is difficult to realize the synchronization of the turn-on or turn-off of the control device, which makes the output power of multiple parallel UPSs inconsistent, resulting in high-frequency circulating currents between UPSs, affecting the power supply stability of the UPS parallel system

Method used

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  • UPS parallel system and counter synchronization signal receiving method
  • UPS parallel system and counter synchronization signal receiving method
  • UPS parallel system and counter synchronization signal receiving method

Examples

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Effect test

Embodiment 1

[0047] image 3 Shown is the structure diagram of the UPS parallel system provided by Embodiment 1 of the present invention, specifically including UPS1 and UPS2, each UPS includes two sending ports, two receiving ports and two judging ports respectively, Vi is the UPS power input terminal, Vo is the output terminal of UPS power supply, where:

[0048] The first receiving port R311 of UPS1 is connected to its own first sending port T311, and is connected to the first sending port T321 of UPS2; the first judging port J311 of UPS1 is connected to its own first sending port T311, and is connected to the first sending port T311 of UPS2. A sending port T321 is connected; the second receiving port R312 of UPS1 is connected to its own second sending port T312, and is connected to the second sending port T322 of UPS2; the second judgment port J312 of UPS1 is connected to its own second sending port T312 , and connected to the second sending port T322 of UPS2. Correspondingly, the fi...

Embodiment 2

[0062] Figure 4 Shown is the structure diagram of the UPS parallel system provided by Embodiment 2 of the present invention, specifically including UPS1 and UPS2, each UPS includes n sending ports, n receiving ports and n judging ports respectively, n is greater than 2, and Vi is the UPS Power input terminal, Vo is UPS power output terminal, where:

[0063] The first receiving port R411 of UPS1 is connected to its own first sending port T411, and is connected to the first sending port T421 of UPS2; the first judging port J411 of UPS1 is connected to its own first sending port T411, and is connected to the first sending port T411 of UPS2. A sending port T421 is connected; the second receiving port R412 of UPS1 is connected to its own second sending port T412, and is connected to the second sending port T422 of UPS2; the second judgment port J412 of UPS1 is connected to its own second sending port T412 , and connected to the second sending port T422 of UPS2... The nth receivin...

Embodiment 3

[0076] Figure 7 Shown is the structure diagram of the UPS parallel system provided by Embodiment 3 of the present invention, specifically including UPS1 and UPS2, each UPS includes two sending ports and two receiving ports respectively, Vi is the UPS power input terminal, and Vo is the UPS power output end, where:

[0077] The first receiving port R711 of UPS1 is connected to its own first sending port T711, and is connected to the first sending port T721 of UPS2; the second receiving port R712 of UPS1 is connected to its own second sending port T712, and is connected to the first sending port T721 of UPS2. The two sending ports T722 are connected. Correspondingly, the first receiving port R721 of UPS2 is connected to its own first sending port T721, and is connected to the first sending port T711 of UPS1; the second receiving port R722 of UPS2 is connected to its own second sending port T722, and is connected to The second sending port T712 of UPS1 is connected.

[0078] ...

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Abstract

The invention discloses a UPS parallel system and a counter synchronizing signal receiving method thereof. The UPS parallel system includes a plurality of UPSs connected in parallel; a first receiving port of each UPS is connected with a first sending port of itself, and is connected with a first sending port of each of other UPSs; a first judging port of each UPS is connected with a first sending port of itself, and is connected with a first sending port of each of other UPSs; a second receiving port of each UPS is connected with a second sending port of itself, and is connected with a second sending port of each of other UPSs; and a second judging port of each US is connected with a second sending port of itself, and is connected with a second sending port of each of other UPSs. By adoption of the UPS parallel system and the counter synchronizing signal receiving method which are provided by the invention, high-frequency circular current between the UPSs connected in parallel can be reduced.

Description

technical field [0001] The invention relates to the technical field of control, in particular to a UPS parallel system and a counter synchronization signal receiving method thereof. Background technique [0002] UPS (Uninterruptible Power Supply, uninterruptible power supply) refers to a device that can continue to supply power to the load when the AC input power supply (used to be called the mains) is abnormal or cut off, and can ensure the quality of the power supply so that the load power supply is not affected. To ensure the reliability of power supply. In some occasions that require high power supply reliability, multiple UPSs are usually connected in parallel to further improve power supply reliability. [0003] In a UPS, it mainly includes a control unit, a rectification unit, and an inverter unit, etc., wherein the turn-on or turn-off time of the controllable devices in the inverter unit is controlled by the count value of the chopper counter of the control unit. H...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00
Inventor 王丛沈宝山卢军
Owner VERTIV CORP
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