A method and device for backfeed protection of uninterruptible power supply ups circuit and ups

A circuit and power supply technology, applied in the field of uninterruptible power supply, can solve problems such as reducing system design costs, achieve the effect of reducing design costs and reducing the difficulty of device selection

Active Publication Date: 2020-06-26
EMERSON NETWORK POWER CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] The embodiment of the present invention provides an uninterruptible power supply UPS circuit backfeed protection method, device and UPS, which are used to solve the problem that traditional mechanical backfeed protection in the prior art must select backfeed protection devices with distance requirements, and reduce device selection. Type difficulty, reduce system design cost

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  • A method and device for backfeed protection of uninterruptible power supply ups circuit and ups
  • A method and device for backfeed protection of uninterruptible power supply ups circuit and ups
  • A method and device for backfeed protection of uninterruptible power supply ups circuit and ups

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Embodiment Construction

[0029] Embodiments of the present application will be described below in conjunction with the accompanying drawings. It should be understood that the embodiments described here are only used to illustrate and explain the present application, and are not intended to limit the present application.

[0030] In view of the traditional mechanical backfeed protection in the prior art, it is necessary to select a backfeed protection device with a distance requirement, and there is a problem that the selection of the device is difficult and the system design cost is high. The embodiment of the present invention provides a UPS circuit Backfeed protection scheme. In this scheme, by collecting the input voltage at the AC input port of the UPS, it is determined that the input voltage is a DC voltage, and the input voltage value is greater than the preset threshold. connected relays, so as to cut off the input of the battery components, avoiding the danger of electric shock caused by the op...

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Abstract

An embodiment of the invention discloses an uninterruptible power supply UPS circuit backflow protection method, a UPS circuit backflow protection device and a UPS, which are used for solving the problem that a backflow protection device with a distance requirement is bound to be selected for the traditional mechanical backflow protection in the prior art, reduce the difficulty of device model selection, and decrease the system design cost. The UPS circuit backflow protection method comprises the steps of: acquiring an input voltage at an AC input port of the UPS; and controlling to disconnecta relay connected with a battery module in the UPS under the condition of determining that the input voltage is a DC voltage and the input voltage value is greater than a preset threshold value.

Description

technical field [0001] The invention relates to the technical field of uninterruptible power supplies, in particular to a UPS circuit backfeed protection method, device and UPS applied in an uninterruptible power supply UPS. Background technique [0002] A typical online uninterruptible power supply (Uninterruptible Power Supply, UPS) can usually work in three modes: mains power supply mode, battery inverter mode and bypass mode. When the mains is normal and there is no abnormality in the UPS, the UPS works in the mains power supply mode; when the mains is abnormal or the input power is cut off, the UPS switches the working mode to the battery inverter mode to continuously supply power to the load; when the internal inverter of the UPS When a fault occurs or the battery discharge is completed, it can work in bypass mode to provide maximum power to the load. [0003] The so-called battery inverter mode means that the battery components in the UPS are used as input to supply ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J9/06
CPCH02J9/061
Inventor 张建忠岳光辉王莎袁秦海
Owner EMERSON NETWORK POWER CO LTD
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