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Short-circuit protection method and device for UPS parallel operation system and UPS

A short-circuit protection and load short-circuit technology, applied in the field of UPS, can solve problems such as damage to uninterruptible power supply devices, and achieve the effect of preventing device damage and protecting devices

Pending Publication Date: 2021-03-16
KEHUA DATA CO LTD +1
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  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the embodiment of the present invention provides a short-circuit protection method, device, and UPS for a UPS parallel system to solve the problem in the prior art that when a load connected to a UPS parallel system is short-circuited, a certain The problem that the uninterruptible power supply bears a current far exceeding its own current limit point for a certain period of time, thereby damaging the components in the uninterruptible power supply

Method used

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  • Short-circuit protection method and device for UPS parallel operation system and UPS
  • Short-circuit protection method and device for UPS parallel operation system and UPS
  • Short-circuit protection method and device for UPS parallel operation system and UPS

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Embodiment Construction

[0019] In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

[0020] In order to illustrate the technical solutions of the present invention, specific examples are used below to illustrate.

[0021] figure 1 It is a schematic flowchart of the realization of the short-circuit protection method of the UPS parallel system provided by an embodiment of the present invention. For the convenience of description, only the parts related to the embodime...

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Abstract

The invention is applicable to the technical field of parallel operation systems, and discloses a short-circuit protection method and device for a UPS parallel operation system and a UPS. The method is applied to any UPS in the UPS parallel operation system, and the method comprises the following steps: when a load short circuit is detected, generating short-circuit protection information, sendingthe short-circuit protection information to other UPSs in the UPS parallel operation system, and conducting short-circuit protection according to the short-circuit protection information, wherein theshort-circuit protection information is used for indicating each UPS in the UPS parallel operation system to perform short-circuit protection at the same time; and when short-circuit protection information sent by other UPSs in the UPS parallel operation system is received, performing short-circuit protection according to the short-circuit protection information. According to the invention, the phenomenon of successive short-circuit protection is avoided, so that the phenomenon that a certain UPS bears current far beyond a current limiting point of the UPS within a certain period of time is avoided, devices in the UPS can be prevented from being damaged, and the purpose of protecting devices in the UPS is achieved.

Description

technical field [0001] The invention belongs to the technical field of parallel systems, and in particular relates to a short-circuit protection method, device and UPS of a UPS parallel system. Background technique [0002] The UPS (Uninterruptible Power Supply, uninterruptible power supply) parallel system includes at least two uninterruptible power supplies connected in parallel, and the output of each uninterruptible power supply is configured to supply power to each load after being configured in a power distribution cabinet. [0003] The UPS parallel system is usually far away from the load. When the load is short-circuited, because each UPS cannot detect the short circuit at the same time, each UPS will perform short-circuit protection successively. In the continuous flow stage of the busbar, there will inevitably be uneven current phenomenon, and because each uninterruptible power supply has been short-circuited successively, the uneven current phenomenon is more obvi...

Claims

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Application Information

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IPC IPC(8): H02H3/08H02H1/00H02J9/06
CPCH02H3/08H02H1/0061H02J9/06
Inventor 陈海飞卢雄伟吴泳斌许永志
Owner KEHUA DATA CO LTD
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