On-line winding deformation diagnosis method, system and equipment of transformer

A transformer winding and winding deformation technology, applied in transformer testing, electrical winding testing, electrical/magnetic solid deformation measurement, etc., can solve problems such as power outages and achieve the effect of ensuring stability

Inactive Publication Date: 2020-04-14
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0010] The present invention provides a transformer winding deformation diagnosis method, system and equipment on-line, which

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  • On-line winding deformation diagnosis method, system and equipment of transformer
  • On-line winding deformation diagnosis method, system and equipment of transformer
  • On-line winding deformation diagnosis method, system and equipment of transformer

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Embodiment Construction

[0045] Embodiments of the present invention provide a method, system and equipment for on-line transformer winding deformation diagnosis, which are used to solve the technical problem that power failure is required when detecting transformer winding deformation faults in the prior art.

[0046] In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the following The described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0047] By detecting the vibration frequency changes...

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Abstract

The invention discloses an on-line winding deformation diagnosis method, system and device of a transformer. The method comprises the following steps: analyzing vibration characteristics of a transformer; drawing a relation curve of transformer vibration and load currents according to an analysis result of the vibration characteristics; and determining whether the winding deforms or not accordingto the linear degree of the relation curve of the transformer vibration and the load current. According to the embodiment of the invention, vibration characteristics before and after a transformer fault condition are detected and the characteristic change of the vibration frequency of the transformer can be extracted; on-line diagnosis of deformation of the transformer winding is realized throughthe relation curve of transformer vibration and load current. According to the invention, power failure operation does not need to be conducted on the transformer in the diagnosis process of the transformer, the deformation condition of the transformer winding can be detected in real time, and the stability of a power supply network of a power system is guaranteed.

Description

technical field [0001] The invention relates to the technical field of transformer diagnosis, in particular to a transformer online winding deformation diagnosis method, system and equipment. Background technique [0002] At present, as one of the main equipment of the power system, the transformer is responsible for the hub role of grid interconnection and power exchange. When the transformer is subjected to short-circuit impact or transportation collision and other factors, the transformer winding may be deformed under the action of electrodynamic force or mechanical force. There are three main types of deformation: (1) axial deformation, and the damage is mainly caused by magnetic flux leakage in the amplitude direction. Under the action of the axial electromagnetic force of the transformer, the axial deformation of the transformer winding is caused, including the bending deformation of the wire cake up and down, the collapse of the winding or the wire cake, and the lifti...

Claims

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Application Information

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IPC IPC(8): G01B7/16G01B7/24G01H11/04G01R31/00G01R31/62G01R31/72
CPCG01B7/16G01B7/24G01H11/04G01R31/00
Inventor 蔡玲珑孙文星杨贤何宏明马志钦靳宇晖周丹江丹宇刘剑锋向谆潘君镇
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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