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Pre-magnetizing grid-connected power-on method and system for high-voltage transformer

A high-voltage transformer, pre-magnetization technology, applied in the direction of circuits, magnetic objects, wind power generation, etc., can solve the problems of unfavorable ships, cumbersome operation procedures, increased fuel consumption, etc., and achieve the effect of reducing impact, reducing cost, and reducing power consumption

Pending Publication Date: 2022-08-02
JIANGNAN SHIPYARD GRP CO LTD
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  • Claims
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Problems solved by technology

However, if the excitation inrush current generated by the high-voltage transformer is very large, it is necessary to run multiple generators at the same time, or even connect all the generators on board to the grid for power supply. The operation process is cumbersome, and running multiple generators will greatly increase fuel consumption. very bad for

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  • Pre-magnetizing grid-connected power-on method and system for high-voltage transformer

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[0029] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of the present application, but not all of the embodiments. The components of the embodiments of the present application generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

[0030] Thus, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the application as claimed, but is merely representative of selected embodiments of the application. Based on the embodiments in the present application, all other embodiments obtained...

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Abstract

The invention provides a pre-magnetizing grid-connected power-on method and system for a high-voltage transformer. The pre-magnetizing grid-connected power-on method for the high-voltage transformer comprises the following steps that a pre-magnetizing transformer is arranged on the secondary side of a first high-voltage transformer, and the primary side of the pre-magnetizing transformer is communicated with the secondary side of the first high-voltage transformer; the secondary side of the pre-magnetizing transformer is communicated with the secondary side of the second high-voltage transformer according to the pre-magnetizing grid-connected power-on electric signal instruction of the second high-voltage transformer; after pre-magnetizing of the second high-voltage transformer is completed, the secondary side of the pre-magnetizing transformer is disconnected from the secondary side of the second high-voltage transformer; and the primary side of the second high-voltage transformer is communicated with the generator. According to the technical scheme, the excitation current generated when the high-voltage transformer is pre-magnetized and powered on can be effectively reduced.

Description

technical field [0001] The present application relates to the technical field of power supply for ships, and in particular, to a method and system for pre-magnetization and grid-connected power supply for high-voltage transformers. Background technique [0002] When there is residual magnetism in the iron core before the high-voltage transformer of the ship is connected to the grid, and the residual magnetic flux in the iron core is in the same direction as the magnetic flux generated by the working voltage when the transformer is put into operation, the total magnetic flux far exceeds the saturation magnetic flux of the iron core. It saturates the iron cores, so a huge impulse excitation current is generated, which is usually called excitation inrush current. The excitation inrush current will cause the power quality to decline, the harmonics of the power grid to increase, the excessive voltage drop to cause the tripping protection of sensitive loads such as motors, and the...

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Application Information

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IPC IPC(8): H02J3/38H01F13/00
CPCH02J3/38H01F13/003Y02E40/40
Inventor 邹燕龙夏嵘霍春香
Owner JIANGNAN SHIPYARD GRP CO LTD
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