Method for evaluating relay protection states

A relay protection and state assessment technology, applied in the field of power system, can solve the problem of inability to accurately reflect the operation status of relay protection equipment, and achieve the effect of easy programming, easy transplantation, and clear design ideas.

Inactive Publication Date: 2014-07-23
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

[0004] The fuzzy comprehensive evaluation method is getting more and more attention in the field of relay protection state evaluation, but the determination of its constant weight coefficient depends on the experience of experts. Real operating status of electrical protection equipment

Method used

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  • Method for evaluating relay protection states
  • Method for evaluating relay protection states
  • Method for evaluating relay protection states

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Embodiment Construction

[0041] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0042] The present invention proposes a method for evaluating the state of relay protection, such as figure 1 As shown, it mainly includes:

[0043] Step 1. Determine each individual state quantity of relay protection state evaluation and collect data. The data of relay protection equipment to be collected mainly includes: factory information, technical agreements, installation records, as-built drawings, acceptance reports, inspection records, action records, defect records, countermeasure records, maintenance records, and experiment reports.

[0044]Step 2. Determine the state rating and build a hierarchical state evaluation system according to different evaluation objectives. The state rating of the present invention is divided into normal state, attention state, abnormal state and serious state. The normal state means that each state quantity is...

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Abstract

The invention belongs to the field of electric power systems, and particularly relates to a method for evaluating relay protection states. The method includes the steps: firstly, determining single state quantities of state evaluation to acquire acquisition; secondly, building a hierarchical state evaluation system; thirdly, computing constant weight coefficients and variable weight coefficients of the single state quantities according to association rules and variable weight theories; fourthly, building membership functions of the single state quantities for state rates by a fuzzy distribution method, building a fuzzy relation matrix, and gradually computing fuzzy comprehensive evaluation result vectors; finally, judging the running state of a relay protection device according to a maximum membership principle. The influence of expert opinion subjectivity on the weight coefficients is avoided, the method contributes to solving the problem that a real running state of the relay protection device cannot be reflected by the constant weight coefficients, an accurate and simple relay protection state evaluation result is provided for operators and can serve as a state maintenance basis, the design thinking is clear, programming is easily realized, and transplantation between different programming environments is facilitated.

Description

technical field [0001] The invention belongs to the field of power systems, and in particular relates to a method for evaluating a relay protection state. Background technique [0002] The safe and reliable operation of relay protection equipment is very important for power system. The wrong action of relay protection equipment will cause or expand the failure of power system, which will bring great losses to the national economy. Therefore, it is of great significance to study effective and effective relay protection state evaluation methods. [0003] The existing evaluation methods of relay protection state mainly include expert judgment model, fuzzy theory, support vector machine and rough set, among which fuzzy theory is getting more and more attention. The above methods have their own characteristics but also have shortcomings. The expert evaluation model mainly scores the state of relay protection equipment based on expert experience, which lacks an objective theore...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q50/06
Inventor 赵冬梅梁伟宸
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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