Transformer fuzzy comprehensive evaluation method based on variable weight

A fuzzy comprehensive evaluation and fuzzy comprehensive evaluation technology, which is applied in the field of transformer fuzzy comprehensive evaluation based on variable weights, can solve problems such as the inability to reflect the influence of small weight value state quantity evaluation targets and the unreasonable distribution of weight coefficients, and achieve a comprehensive evaluation method. Reasonable and reduce the effect of subjective factors

Inactive Publication Date: 2017-08-04
STATE GRID CORP OF CHINA +2
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Problems solved by technology

[0005] At present, there are few studies on the determination method of the index weight in the transformer state evaluation, and the constant weight evaluation model is mainly used, which leads

Method used

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  • Transformer fuzzy comprehensive evaluation method based on variable weight
  • Transformer fuzzy comprehensive evaluation method based on variable weight
  • Transformer fuzzy comprehensive evaluation method based on variable weight

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Embodiment Construction

[0053] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0054] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element referr...

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Abstract

The invention provides a transformer fuzzy comprehensive evaluation method based on a variable weight. The method includes following steps: collecting state data according to a pre-established transformer state comprehensive evaluation index system, and performing dimensionless standardization processing on evaluation indexes; determining a constant weight by employing an analytic hierarchy process, and performing variable weight processing on a constant weight vector with the combination of an evaluation index set obtained after standardization processing; establishing a power transformer state grade remark set; determining a fuzzy comprehensive evaluation matrix according to the membership degree of the bottom layer in a membership function calculating evaluation model for the state grade, calculating an evaluation result, and obtaining the overall state of the transformer by employing a fuzzy comprehensive evaluation operator; and obtaining the membership degree of each state for the fuzzy comprehensive evaluation, and determining the operation state grade of the transformer by employing a maximum membership degree principle. According to the method, the change of the weight value of the quantity of state is realized according to the practical state index so that the influence of the quantity of state with large deterioration degree on an evaluation target is increased, and the state evaluation is more reasonable.

Description

technical field [0001] The invention relates to the technical field of equipment comprehensive evaluation, in particular to a transformer fuzzy comprehensive evaluation method based on variable weight. Background technique [0002] Large-scale power transformers are the hub of electric power grid transmission, and their safety and reliability are the necessary conditions to ensure the reliable operation of the power system. With the continuous increase of the power system scale and transformer capacity, the losses caused by its failure to the national economy are also increasing. Big. [0003] Transformer condition evaluation is an important basis for decision-making of condition-based maintenance, which determines the items and content of equipment condition-based maintenance, and directly affects the quality and effect of transformer condition-based maintenance. The state evaluation of power transformer involves many state quantities, and the change of each state quantity...

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Application Information

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IPC IPC(8): G06Q10/06
CPCG06Q10/06393
Inventor 贺春光邵华刘鹏马国真周兴华安佳坤谢晓琳韩文源张文斌翟广心张昭旭胡诗尧冯万鹏孙鹏飞韩璟琳胡平石亚欣董昕李树水凌云鹏王颖朱俊栋
Owner STATE GRID CORP OF CHINA
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