A Transformer State Evaluation Method Based on Multi-Layer Composite Rules

Abstract

The invention discloses a transformer state evaluation method based on a multilayer compound rule. The method comprises the following steps of firstly, dividing a transformer state evaluation system into three layers, namely a data layer, a transformer layer and a substation layer; constructing an evaluation system of the data layer based on transformer monitoring test data, dividing a transformer into five component systems and respectively solving key coefficients for component evaluation for each component system in order to construct an evaluation parameter system about five components at the first layer; dividing transformer performance evaluation into four main aspects, utilizing an association rule to respectively establish evaluation models of transformer component evaluation data, fault data, defect data and performance and solving a key coefficient matrix for performance evaluation at the second layer; and fusing performance evaluation data of main transformers of a plurality of substations at one voltage class of one city with power supply load data and establishing the transformer state evaluation system at the third layer. According to the layered evaluation models, the systematicness and the accuracy of transformer evaluation are improved and the safe operation of a power grid is guaranteed.

Description

【Technical field】 [0001] The invention relates to the state evaluation technology of electric equipment, in particular to a method for constructing a transformer state evaluation system based on multi-layer composite rules. 【Background technique】 [0002] The safe and efficient operation of power equipment is related to the development of the national economy and every aspect of everyone's life, and the power transformer is one of the main transformation equipment in the operation of the power grid. Its health and safety are necessary guarantees for the stable operation of the power grid. With the rapid development of the power grid, more and more single high-voltage, large-capacity power transformers are put into power grid operation. At the same time, transformer failures caused by factors such as manufacturing, transportation, installation and maintenance quality are seriously threatening The safe operation of the entire power system, therefore, the correct evaluation of ...

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Problems solved by technology

[0003] Traditional power transformer state evaluation rules generally have the disadvantages of single evaluation rules, poor readability and applicability, and cannot design more appropriate evaluation criteria and evaluation parameter systems for different attention levels, resulting in insufficient comprehensive transformer state evaluation. Therefore, it is impossible to correctly guide the maintenance and replacement of transformers.

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