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A marine 400hz intermediate frequency power supply uninterrupted switching device and method

An intermediate frequency power supply and switching device technology, applied in the field of ships, can solve problems such as the inability to meet the continuity requirements of the intermediate frequency 400Hz power supply, and achieve the effect of increasing the reliability of power supply, ensuring safety and reliability, and adding mechanical bypass switches.

Active Publication Date: 2018-07-06
武汉华海通用电气有限公司
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  • Abstract
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Problems solved by technology

[0008] Aiming at the defects of the prior art, the object of the present invention is to provide a device and method for uninterrupted switching of a marine 400Hz intermediate frequency power supply, aiming to solve the problem that the switching circuit in the prior art cannot meet the continuous switching requirements of the intermediate frequency 400Hz power supply due to a delay for a period of time. technical issues

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  • A marine 400hz intermediate frequency power supply uninterrupted switching device and method

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Embodiment Construction

[0024] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0025] The switching device provided by the present invention can realize reliable, fast and safe switching of the marine intermediate frequency 400 Hz power supply. When the ship's main intermediate frequency 400Hz power supply fails, within 2.5ms of a sine cycle, cut off the main power circuit and switch on the backup power circuit to ensure the continuity of power supply for the navigation equipment.

[0026] The invention uses static switching thyristors, plus fast voltage and current detection and power failure judgment methods, the switching action can be completed in 2.5ms, which ensures...

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Abstract

The invention discloses an uninterrupted switching device and method for a marine 400Hz intermediate frequency power supply, comprising a first voltage sensor, a second voltage sensor, a third voltage sensor, a current sensor, a first full-control type power electronic device, a second full-control type A power electronic device, a first switch, a second switch and a control circuit. The present invention uses a static switch thyristor, coupled with fast voltage and current detection and a power failure judgment method, the switching action can be completed within 2.5ms, ensuring the continuity of power supply; using suitable switching strategies and protection logic: if the load is short-circuited, do not switch, switch The selection of points, etc., ensures the safety and reliability of the switching process; the addition of a mechanical bypass switch increases the reliability of the power supply.

Description

Technical field [0001] The invention belongs to the technical field of ships, and more specifically, relates to a device and method for uninterrupted switching of a 400 Hz intermediate frequency power supply for ships. Background technique [0002] In the marine field, the intermediate frequency 400Hz power supply provides power for navigation equipment. In order to ensure the reliability of power supply for navigation equipment, two intermediate frequency 400Hz power supplies are generally equipped, one for main use and one for backup. Under normal circumstances, the main power supply is used for power supply. When the main power supply fails, the standby power supply is turned on to ensure the continuity of the power supply of the navigation equipment. [0003] The current switching method mainly relies on manual operation, including four stages of failure occurrence, failure judgment, execution switching, and switching end. The switching time is too long to guarantee the contin...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J9/06
Inventor 曾祥孔陈林柳彬王玮皇丰辉胡丁丁李维徐芬
Owner 武汉华海通用电气有限公司
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