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Device and method for protection against deformation of top cover of converter transformer on-load tap changer

A voltage regulating switch, converter transformer technology, applied in the direction of transformers, electric switches, variable transformers, etc., can solve the problems of severe economic losses, transformer equipment damage, etc., and achieve the effects of fast response, reliable start-up, and easy realization

Active Publication Date: 2022-05-20
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since 2017, there have been a number of major converter transformer fire accidents in China. The accidents caused the destruction of some transformer equipment, causing adverse effects and major economic losses.

Method used

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  • Device and method for protection against deformation of top cover of converter transformer on-load tap changer
  • Device and method for protection against deformation of top cover of converter transformer on-load tap changer

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Experimental program
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Embodiment Construction

[0026] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0027] see figure 1 , the deformation protection device for the top cover of the on-load voltage regulating switch of the converter transformer, including the vibration oil pressure starting unit 5 and the strain protection unit 6 provided on the top cover 3 on the voltage regulating switch 2 of the converter transformer 1, and the oil pressure starting unit 5 includes The high-frequency dynamic oil pressure sensor, the strain protection unit 6 includes a strain sensor, the strain protection unit 6 is also connected with a trip unit 7 , and an oil conservator 4 is arranged on one side of the converter transformer 1 . Top cover 3 is a metal top cover. The pressure regulating switch 2 is arranged on the oil chamber of the pressure regulating switch.

[0028] see figure 2 , the method for protecting the deformation of the top cover of the on-load tap changer of the ...

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Abstract

The invention discloses a deformation protection device and method for a top cover of a converter transformer on-load voltage regulating switch, including an oil pressure starting unit and a strain protection unit arranged on the top cover of a converter transformer voltage regulating switch. The oil pressure starting unit includes a high-frequency dynamic The oil pressure sensor, the strain protection unit includes a strain sensor, and the strain monitoring unit is also connected with a trip unit. The application of the present invention has an irreplaceable protective effect on the reliable and fast screening of the plastic deformation of the top cover. The device of the invention can operate reliably for a long time without being affected by strong electromagnetic and oil pollution environments, has the advantages of fast response rate and high measurement frequency, does not inject harmonics into the power system during operation, and does not affect the normal operation of the primary and secondary equipment in the substation run.

Description

technical field [0001] The invention belongs to the field of electric equipment protection, and relates to a converter transformer on-load tap changer top cover deformation protection device and method, which are used for monitoring, analyzing and recording the deformation state characteristics of the converter transformer tap changer top cover, and realizing fault discrimination and removal. Background technique [0002] The safe operation of the power grid is the basis for ensuring continuous and stable power supply, and it is also the guarantee for the safety of the power grid itself. With the rapid development of UHV DC transmission projects, the operation of power grids puts forward higher requirements for the safety and reliability of power transmission and transformation equipment. Different from the AC components in the system, the failure of key DC equipment will generally lead to partial loss of DC power, and the power imbalance will cause fluctuations in frequency...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H11/00H01H71/12H01H9/00H01F29/04H01F27/40
CPCH01H11/0062H01H71/12H01H9/0044H01F29/04H01F27/402H01F2027/404Y02E60/60
Inventor 闫晨光朱述友刘苏梅丁凯席旺旺罗博文
Owner XI AN JIAOTONG UNIV
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