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A Calculation Method of Transformer Failure Rate Considering Temperature

A transformer fault, transformer technology, applied in computing, computer parts, instruments, etc., can solve problems such as low evaluation accuracy, over-repair or disrepair, etc.

Active Publication Date: 2021-08-20
GUANGDONG POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is used to solve the problems that the traditional method uses experience, a small number of parameters or data, which may easily cause low evaluation accuracy and lead to over-repair or disrepair.

Method used

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  • A Calculation Method of Transformer Failure Rate Considering Temperature
  • A Calculation Method of Transformer Failure Rate Considering Temperature
  • A Calculation Method of Transformer Failure Rate Considering Temperature

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0034] Such as figure 1 As shown, a transformer failure rate calculation method considering temperature, the transformer failure depends on the abnormal change characteristics of transformer partial discharge and temperature elements, and the transformer failure probability is calculated and determined by the abnormal change characteristic values ​​of transformer partial discharge and temperature elements according to the probability principle, Among them, partial discharge elements include: partial discharge, skewness, steepness, cross-correlation coefficient, phase asymmetry number; temperature elements include: hot spot temperature at typical load, hot spot temperature at high load, oil temperature; Deterministic transformer partial discharge and abnormal change characteristic values ​​of temperature elements are clustered to construct a transformer failure rate calculation function, including the following steps;

[0035] S1: Transformer partial discharge data set construc...

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Abstract

The invention relates to the field of electric power system and its automation, in particular to a method for calculating the failure rate of a transformer considering temperature. Based on the establishment of a large database, the principle of data clustering is used to process and analyze the big data; for the parameters of randomness and fuzzy uncertainty involved in the evaluation of the transformer fault state, the theory of probabilistic fuzzy sets is used for processing and analysis. A transformer fault rate calculation method considering temperature proposed by the present invention can evaluate the fault state of the transformer, which reflects the uncertainty of the characteristic value of the fault state of the transformer, provides theoretical guidance for the evaluation of the fault state of the transformer, and contributes to the operation of the distribution network. Provide necessary technical support.

Description

technical field [0001] The invention relates to the field of electric power system and its automation, in particular to a method for calculating the failure rate of a transformer considering temperature. Background technique [0002] There are a large number of transformers, and there will be different degrees of deterioration, deterioration, and defects, which are familial and concealed, and it is difficult to detect and evaluate them in time. Due to the great differences in the operating years, environment, maintenance, etc. and the influence of many factors, the difficulty and complexity of the evaluation of the deterioration state of the transformer operation are increased, and it cannot meet the higher requirements of precise and intelligent evaluation. [0003] Traditionally, the fault status of transformers is mostly evaluated by calculating and analyzing data of a single factor such as dissolved gas in oil. A single parameter or a small amount of data can easily lead...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/62
CPCG06F18/23G06F18/2415
Inventor 曾振达吴杰康陶飞达邹志强张丽平黄智鹏杨夏
Owner GUANGDONG POWER GRID CO LTD
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