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Backup power supply switch-in method and device

A backup power supply and voltage technology, applied in circuit devices, emergency power supply arrangements, electrical components, etc., can solve problems such as the inability to meet the continuous power supply requirements of chemical enterprises, and achieve the effect of meeting continuous power supply requirements, realizing automatic input, and ensuring normal work.

Active Publication Date: 2019-03-01
CHINA COAL ORDOS ENERGY CHEM COP LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the embodiment of the present application provides a backup power input method and device, which can solve the problem that the prior art cannot meet the continuous power supply requirements of chemical enterprises

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Embodiment Construction

[0055] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0056] For ease of understanding, the following first introduces specific application scenarios of the embodiments of the present application.

[0057] see figure 1 , which is a schematic diagram of an application scenario of the backup power input method and device provided in the embodiment of the present application.

[0058] The backup power input method and ...

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Abstract

The invention discloses a backup power supply switch-in method and device, and the method and device are applied to power supply loops of high-voltage equipment. The method comprises the steps of: detecting voltage of a first power supply bus, voltage of a second power supply bus and current on a power supply branch; when a first branch switch and a first bus switch are switched on and a second branch switch and a second bus switch are switched off, judging whether the voltage of the first power supply bus is smaller than withstand voltage of electric equipment or not, whether the voltage of the second power supply bus is greater than a first threshold value or not and whether the current on the power supply branch is smaller than a second threshold value or not; when the voltage of the first power supply bus is smaller than the withstand voltage, if the voltage of the second power supply bus is greater than the first threshold value and the current on the power supply branch is smaller than the second threshold value, switching off the first branch switch and the first bus switch; and switching on the second bus switch and the first branch switch. According to the method and device, automatic switch-in of backup power supplies is realized, the electric equipment is prevented from halt due to too low voltage of the power supplies, and continuous power supply requirements of chemical enterprises are satisfied.

Description

technical field [0001] The present application relates to the technical field of power electronics, in particular to a backup power input method and device. Background technique [0002] Electricity shock refers to the phenomenon of short-term voltage fluctuations or short-term power outages in the power grid caused by lightning strikes, short circuits or other reasons. The basic types of swaying electricity generated by the power supply system are: voltage sag, swell, short-term power failure, and voltage flicker. Generally, when the effective value of the voltage of the power supply system drops to more than 30% of the nominal value and lasts for a long time (such as 80-200 milliseconds), it will cause the electrical equipment to stop working, or cause the quality of the produced products to decline. [0003] In the transient state of the external power grid or internal short-circuit fault, the traditional automatic input device of the backup power supply can no longer me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J9/06
CPCH02J9/06Y04S20/20Y02B70/30
Inventor 栗进涛李建姚广田
Owner CHINA COAL ORDOS ENERGY CHEM COP LTD
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