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Method and device for suppressing electromagnetic vibration of inductive filtering converter transformer

A converter transformer and electromagnetic vibration technology, which is applied in transformer/inductance components, harmonic reduction devices, prevention/reduction of unnecessary electric/magnetic effects, etc., can solve the problems of transformer vibration weakening, high cost, etc.

Inactive Publication Date: 2017-01-04
STATE GRID CORP OF CHINA +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the actual engineering experience of the transformer factory, it is relatively expensive to reduce the vibration of the converter transformer by improving the manufacturing method, and it is basically impossible to greatly reduce the vibration of the transformer

Method used

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  • Method and device for suppressing electromagnetic vibration of inductive filtering converter transformer
  • Method and device for suppressing electromagnetic vibration of inductive filtering converter transformer
  • Method and device for suppressing electromagnetic vibration of inductive filtering converter transformer

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] A method for suppressing electromagnetic vibration of an induction filter converter transformer, adding an induction filter three-phase winding to the converter transformer;

[0022] The added induction filter three-phase winding adopts a delta connection mode, and the equivalent impedance is zero;

[0023] The three-phase terminals of the induction filter three-phase winding are connected with the three-phase passive filter.

[0024] The three-phase passive filter is a fully tuned LC filter with 2, 5, 7, 11, and 13 combinations.

[0025] An electromagnetic vibration suppression device for an induction filter converter transformer, comprising a grid-side three-phase winding, a valve-side three-phase winding, and an induction filter three-phase winding;

[0026] The three-phase windings on the grid side are connected in a star shape, and the thr...

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PUM

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Abstract

The invention discloses a method and device for suppressing electromagnetic vibration of an inductive filtering converter transformer. According to the method, a zero impedance path is provided for second harmonic current, fifth harmonic current, seventh harmonic current, eleventh harmonic current and thirteenth harmonic current through a filter winding and a matched all-tunable filter for drainage and filtration. Harmonic waves are filtered off nearby, the path that the harmonic current escapes to a network side from a valve side is cut off and the harmonic current and the harmonic electromagnetic force of a network side winding of the converter transformer and circulating harmonic flux and magnetostriction level in an iron core are effectively reduced in a manner of effectively suppressing the harmonic flux of the iron core of the transformer, thereby achieving the target of suppressing the electromagnetic vibration of a converter transformer body.

Description

technical field [0001] The invention relates to a method and device for suppressing electromagnetic vibration of an induction filter converter transformer. Background technique [0002] The long-term research results show that the main reasons for the electromagnetic vibration of the transformer are: 1) The silicon steel sheets that make up the transformer core are under the action of the alternating magnetic field, due to the magnetostrictive effect, the core is periodically stretched and vibrated with the frequency of the alternating magnetic field; 2) The leakage magnetic field of the transformer acts between the laminations of the silicon steel sheet and the joint position between the iron core and the iron yoke, which will generate a corresponding electromagnetic force, which makes the iron core vibrate; 3) When the load current flows in the winding , The magnetic flux leakage generated by the transformer acts on each winding and transformer oil tank to generate electro...

Claims

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Application Information

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IPC IPC(8): H02J3/24H02J3/01H01F27/38
CPCH01F27/385H02J3/01H02J3/24Y02E40/40
Inventor 陈跃辉周冠东罗隆福张志文
Owner STATE GRID CORP OF CHINA
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