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Voltage sag prevention device

A technology for preventing electricity and power grids, which is applied in circuit devices, harmonic reduction devices, electrical components, etc., and can solve problems such as economic losses and potential safety hazards.

Pending Publication Date: 2021-12-10
UPC BLUE SKY PETROLEUM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an anti-shaking device to solve the problem that the AC contactor will be released when the power grid shakes, resulting in economic losses and potential safety hazards

Method used

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  • Voltage sag prevention device

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Embodiment Construction

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0024] The object of the present invention is to provide an anti-swaying device to solve the problem that the AC contactor will be released when there is a swaying electricity in the power grid, resulting in economic losses and potential safety hazards.

[0025] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompan...

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Abstract

The invention relates to a voltage sag prevention device, which comprises a voltage acquisition unit, a controller, a converter, an inverter, an energy storage unit, a change-over switch, a storage unit and a data communication interface, wherein the voltage acquisition unit is connected with a power grid, the inverter is connected with the power grid, the energy storage unit is connected with the inverter, the converter is connected with the energy storage unit, the storage unit is connected with the controller, the data communication interface is connected with the controller, the receiving end of the controller is connected with the output end of the voltage acquisition unit, the control end of the controller is connected with one end of the change-over switch, and the other end of the change-over switch is connected with the converter and the power grid; and the controller is used for switching connection between an alternating current contactor and the converter and connection between the alternating current contactor and the power grid according to the power grid voltage acquired by the voltage acquisition unit. According to the invention, the problems of economic loss and potential safety hazards caused by the release of the AC contactor when the power grid is subjected to voltage sag can be solved.

Description

technical field [0001] The invention relates to the technical field of electric equipment protection, in particular to an anti-shaking device. Background technique [0002] In modern enterprises with continuous production such as petroleum, chemical industry, metallurgy, and papermaking, the reliability of power supply is extremely important, because most of the low-voltage motors are controlled by AC contactors. Due to the characteristics of the working principle of AC contactors, When the power grid appears "shocking electricity", it will cause short-term power failure or low voltage of the working coil of the AC contactor, which will cause the release of the AC contactor and cause the equipment to be powered off and shut down. Moreover, in the power supply systems of petroleum, chemical industry, metallurgy, and papermaking, the production process control precision is high, and it is sensitive to grid disturbance. Once the sloshing electricity occurs, it will seriously i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J9/06H02J3/28H02J3/01
CPCH02J9/062H02J3/28H02J3/01Y02E40/40
Inventor 韦志浩李凯凯徐恩方卢惠东于英超严川赵寿元王昌锋王海辉王浩祺孙振华李新然韦伟中
Owner UPC BLUE SKY PETROLEUM TECH CO LTD
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