Improved power transformer fault diagnosis method

A power transformer and fault diagnosis technology, which is applied in transformer testing, reasoning methods, and measurement of electrical variables, can solve the problems of inability to quickly locate transformer faults and high time costs

Inactive Publication Date: 2018-02-09
STATE GRID LIAONING ELECTRIC POWER RES INST +2
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  • Application Information

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Problems solved by technology

[0003] The research objective of the present invention is: through comparative analysis of the case to be diagnosed (target case) and the historical case (source case), select the case with high similarity as the diagnosis conclusion of the target case, which can effectively avoid complicated mathem...

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Embodiment Construction

[0033] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0034] In an improved power transformer fault diagnosis method of the present invention, such as figure 1 Including the following steps:

[0035] Step 1 obtains electronic transformer state information;

[0036] Step 2 According to the relevant state information of the power transformer, search the case library and match the relevant state information of the current power transformer, combine figure 2 Execute step 2. When executing step 2, match the information and data such as inspection information, basic information, fault information, operating conditions, chemical experiments, live detection, electrical experiments, and internal inspections. When the matching degree reaches 100%, execute the case library. output result;

[0037] When step 3 is executed, the matching degree does not meet the requirements. Accord...

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Abstract

The invention belongs to the field of power transformer fault diagnosis, and particularly relates to an improved power transformer fault diagnosis method. The general thought of a fault prediction model is that a CBR (Case-Based Reasoning) and RBR (Rule-Based Reasoning) serial reasoning way is used, the number of feature values of a transform is limited due to the particularity of a case, an overhauling strategy can be quickly obtained if retrieval matching can be carried out, reasoning time is saved, the historical experience case is effectively utilized, and the fault diagnosis efficiency ofthe system is improved. When no proper cases can be matched with the cases in a factbase, a rule reasoning way is adopted, a rule conclusion which is generated by reasoning and proves to be accuratecan be taken as the overhauling strategy result of the case, and a new case is formed. By use of the method, the problems in the prior art that elaborative diagnosis can not be carried out, diagnosisfault time cost is high, faults can not be quickly positioned and the like are mainly solved.

Description

technical field [0001] The invention relates to the field of fault diagnosis of power system transformers, in particular to an improved power transformer fault diagnosis method. Background technique [0002] With the rapid development of the economy, the power grid system is gradually developing towards large capacity, ultra-high voltage, long-distance, and intelligence. Power transformers play a vital role in the power system. Therefore, improving the efficiency of transformer fault diagnosis can not only strengthen the power grid Stability and reliability of operation, but also save energy consumption and improve work efficiency. At present, the commonly used power transformer fault diagnosis method in this field is to conduct DGA (Dissolved Gas Analysis), that is, the analysis of dissolved gas in oil, by taking oil samples online or offline. Then, neural network, support vector machine, GEP (Gene Expression Programming) gene expression programming algorithm, etc. are use...

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Application Information

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IPC IPC(8): G06F11/07G06N5/04G01R31/02
CPCG01R31/62G06F11/079G06N5/046
Inventor 李钊雷振江高潇丛海洋郑永健刘树吉胡东魁范维余仰淇吴胜竹陈坤
Owner STATE GRID LIAONING ELECTRIC POWER RES INST
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