Uninterrupted switching device and method for 400Hz intermediate-frequency power supply for ship

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 effects of increasing power supply reliability, ensuring safety and reliability, and increasing mechanical bypass switches.

Active Publication Date: 2015-09-09
武汉华海通用电气有限公司
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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 so

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  • Uninterrupted switching device and method for 400Hz intermediate-frequency power supply for ship

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Embodiment Construction

[0024] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

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

[0026] The present invention uses a static switch thyristor, coupled with fast voltage and current detection and power failure judgment method, the switching action can be completed in 2.5...

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Abstract

The invention discloses an uninterrupted switching device and method for a 400Hz intermediate-frequency power supply for a ship, and the device comprises a first voltage sensor, a second voltage sensor, a third voltage sensor, a current sensor, a first full-control power electronic apparatus, a second full-control power electronic apparatus, a first switch, a second switch, and a control circuit. According to the invention, a static switching thyristor is employed, and methods of rapid voltage and current detection and power loss judgment are also employed. Moreover, the switching operation can be completed within 2.5ms, thereby guaranteeing the continuity of power supply. A proper switching strategy and a protection logic are employed, such as no switching during load short circuit, the selection of a switching point, and so on, thereby guaranteeing the safety and reliability of a switching process. A mechanical-type bypass switch is added, and the reliability of power supply is improved.

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 400Hz intermediate frequency power supply for ships. Background technique [0002] In the field of ships, the intermediate frequency 400Hz power supply supplies 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 backup power supply is switched 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 fault occurrence, fault judgment, execution of switching, and switching end. The switching time is too long to ensure the co...

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Application Information

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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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