Transformer state evaluation method and system

A state assessment and transformer technology, applied in the field of power system, can solve the problems of transformer over-repair or under-repair, need for repair, blind plan for maintenance, etc.

Active Publication Date: 2014-05-07
STATE GRID ZHEJIANG NINGBO YINZHOU POWER SUPPLY LTD CO +2
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Problems solved by technology

However, the traditional maintenance of transformers is a planned maintenance method, that is, the transformers are overhauled according to the scheduled maintenance cycle, and because the initial state of the transformer is good or bad, and the working conditions are different, some transformers do not

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  • Transformer state evaluation method and system
  • Transformer state evaluation method and system
  • Transformer state evaluation method and system

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Embodiment Construction

[0074] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0075] In the actual power operation management and maintenance, for the status information of large-scale hub-type transformers, in addition to the items of daily inspection, it also comes from regular experimental data, that is, preventive test data. In the embodiment of the present application, the converter is divided into six sub-components, each sub-component is classified, and a state quantity index is selected.

[0076] Specifically, the transformer is divi...

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Abstract

An embodiment of the invention discloses a transformer state evaluation method and system. State quantity indexes are normalized to obtain the health degree of the state quantity indexes, the subjective weight of each state quantity index is determined by an analytic hierarchy process in a fuzzy comprehensive evaluation theory, an objective weight corresponding to each state quantity is obtained by an entropy weight method and used for correcting the subjective weight to obtain comprehensive weight parameters of each state quantity index, the connection degree of each state quantity index and state classification is obtained by the aid of connection degree in a set pair analysis theory, and finally, data of evaluation results of a hierarchical index set of each unit are integrated by the aid of D-S evidence theory fusion rules to obtain state evaluation results of each sub-unit. Whether a transformer needs maintenance or not can be determined according to the state evaluation results, so that blindness of planned maintenance is avoided, and human and material resources needed by maintenance for the transformer are reduced.

Description

technical field [0001] The present invention relates to the technical field of power systems, and more specifically, to a transformer state monitoring method and system. Background technique [0002] The transformer plays an important role in the power system and is one of the most important and critical electrical equipment in the power system. The safety and reliability of its operation is directly related to the safety and stability of the power system. With the rapid development of the power grid, more and more single high-voltage, large-capacity transformers are put into power grid operation. At the same time, transformer failures caused by factors such as manufacturing, transportation, installation and maintenance quality seriously threaten the entire power grid. The safe operation of the system, so how to improve the reliability of transformer operation has always been an important topic in transformer operation testing. [0003] In order to make the transformer oper...

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Application Information

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IPC IPC(8): G06Q50/06
Inventor 郑凯朱瑾王勇光袁丹吴明袁忠君宋敬峰
Owner STATE GRID ZHEJIANG NINGBO YINZHOU POWER SUPPLY LTD CO
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