Method for evaluating operation state of dry type transformer

A dry-type transformer and operating state technology, which is applied in the direction of instruments, measuring electronics, measuring devices, etc., can solve the problems of scientifically evaluating the dry-type transformer's operating state and state development trend, and achieve the effect of strong operability

Inactive Publication Date: 2012-10-31
CHONGQING UNIV
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Problems solved by technology

However, these methods are only state analysis methods based on a certain parameter, and cannot sci

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  • Method for evaluating operation state of dry type transformer
  • Method for evaluating operation state of dry type transformer
  • Method for evaluating operation state of dry type transformer

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Embodiment Construction

[0049] Preferred embodiments of the invention will be described in detail below.

[0050] see figure 1 , a dry-type transformer operating state detection and evaluation method, including the following steps:

[0051]1) Detect the operating conditions of the dry-type transformer and the parameter data of the operating environment, and obtain the inherent characteristics of the dry-type transformer and the parameter data of the operation history; establish a three-layer dry-type transformer operating state evaluation index system, see figure 2 , the three-layer dry-type transformer operation state evaluation index system includes target layer, project layer, and index layer. The target layer is the dry-type transformer operation state, and the project layer includes inherent characteristics X1, operating conditions X2, operating environment X3, and operating history X4;

[0052] In the index layer, the inherent characteristics X1 include four index parameters: insulation grad...

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Abstract

The invention relates to the technical field for evaluating the operation state of a transformer, in particular to a method for evaluating the operation state of a dry type transformer. Influences of parameters to the operation state of the dry type transformer are integrated, reliable level analysis is carried out on the operation state of the dry type transformer, and the convenience is brought for operators to hold the operation condition of the dry type transformer in real time and immediately make condition based maintenance. The method comprises the following steps of: 1) detecting parameter data of the operation state and an operation environment of the dry type transformer, and obtaining inherent characteristics of the dry type transformer and parameter data of the operation history; 2) normalizing parameter data of the operation states, the operation environment, the inherent characteristics and the operation history of the dry type transformer; 3) obtaining each parameter membership corresponding to a comment through a membership function of each parameter and the comment, and obtaining a single factor judge matrix; 4) obtaining a comprehensive judge matrix by combining weights of the parameters; and 5) obtaining a comprehensive evaluation value the operation state of the dry type transformer. The operation state of the dry type transformer can be reflected through the evaluation value.

Description

technical field [0001] The present invention relates to the technical field of detecting and evaluating the running state of a transformer, and in particular to a method for comprehensively evaluating the running state of a dry-type transformer. Background technique [0002] In recent years, with the continuous increase of grid load, dry-type transformers have been widely used due to their outstanding advantages. However, accidents of explosion and fire caused by insulation breakdown of dry-type transformers occur frequently during operation, which not only poses a threat to the personal safety of on-site operators, but also affects the safe and stable operation of the power grid. [0003] At present, the judgment of the operation status of dry-type transformers is mainly realized by monitoring parameters such as temperature, humidity, voltage, current and power. Among them, the winding temperature can reflect the internal insulation of the dry-type transformer to a certain...

Claims

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Application Information

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IPC IPC(8): G01R31/00
Inventor 熊兰赵艳龙杨子康宋道军徐敏捷周健瑶何为
Owner CHONGQING UNIV
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