A method and system for detecting fault types of transformer windings

A technology of transformer windings and fault types, which is applied in the direction of measuring electrical variables, instruments, measuring electricity, etc., can solve the problem of inability to determine the fault type of transformer windings.

Active Publication Date: 2018-07-20
STATE GRID CORP OF CHINA +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] In view of this, the embodiments of the present invention provide a method and system for detecting fault types of transformer windings, so as to solve the problem in the prior art that using the short-circuit impedance method for transformers cannot effectively determine the fault types of transformer windings

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  • A method and system for detecting fault types of transformer windings
  • A method and system for detecting fault types of transformer windings
  • A method and system for detecting fault types of transformer windings

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Embodiment Construction

[0053]The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, 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.

[0054] figure 1 The flow chart of the method for detecting the fault type of transformer winding provided by the embodiment of the present invention, based on the relationship between the state of the transformer winding and the leakage reactance parameter, the method can effectively determine the fault type of the transformer winding, so that it is beneficial for field workers to understand the transformer The internal deformation of the winding is conducive t...

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Abstract

The embodiment of the invention provides a method for detecting the fault type of a transformer winding. Based on a preset corresponding relation between fault states of the transformer winding and leakage reactance parameter numerical values, the method includes the steps that a leakage reactance parameter numerical value after a transformer with a winding fault is short-circuited is obtained; according to the preset corresponding relation between the fault states of the transformer winding and the leakage reactance parameter numerical values, the fault state, corresponding to the obtained leakage reactance parameter numerical value, of the transformer winding is determined; according to the determined fault state of the transformer winding, the fault type of the detected transformer winding is determined. The embodiment of the invention further provides a system for detecting the fault type of the transformer winding.

Description

technical field [0001] The invention relates to the field of transformer estimation and detection, in particular to a method and system for detecting fault types of transformer windings. Background technique [0002] As an integral part of the power transmission and distribution system, the safety and stability of the transformer is of great significance to the development of the national economy. Today, as the voltage level continues to increase, power system failures caused by transformer accidents are becoming more frequent, which is not only detrimental to the rapid economic development, but also seriously affects the normal life of residents. [0003] According to statistics, from 1995 to 1999, there were 284 accidents of 110kV and above power transformers in the country, and the total accident capacity was 21360MVA. The number accounts for 71.1% of the total number of accidents caused by all transformer faults, and the possibility of transformer winding faults occurri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/06
Inventor 孙翔何文林姚晖刘浩军胡文堂董雪松梅冰笑董建洋邱炜邹国平于淼金祖龙
Owner STATE GRID CORP OF CHINA
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