Transformer failure rate calculation method considering temperature

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

Active Publication Date: 2018-10-12
GUANGDONG POWER GRID CO LTD +1
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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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  • Transformer failure rate calculation method considering temperature
  • Transformer failure rate calculation method considering temperature
  • Transformer failure rate calculation method considering temperature

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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; The deterministic transformer partial discharge and the abnormal change characteristic value of the temperature element are clustered, and the calculation function of the transformer failure rate is constructed, including the following steps;

[0035] S1: Transformer partial dis...

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Abstract

The present invention relates to the field of power systems and automation of the power systems, and in particular to a transformer failure rate calculation method considering the temperature. The method comprises: based on the establishment of a large database, using the data clustering principle to process and analyze big data; and processing and analyzing parameters of random and fuzzy uncertainty involved in transformer failure state evaluation by using the theory of a probability fuzzy set. According to the transformer failure rate calculation method considering the temperature proposed by the present invention, the transformer failure state can be evaluated, the uncertainty of the transformer failure state characteristic value is reflected, the theoretical guidance is provided for the transformer failure state evaluation, and the necessary technical support is provided for the maintenance and operation of the distribution network.

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 Applications(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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