Method for estimating operating state of SF6 high-voltage circuit breaker and intelligent system

Abstract

The invention discloses a method for estimating an operating state of an SF6 high-voltage circuit breaker and an intelligent system, belonging to the technical field of electric transmission and transformation equipment. The intelligent system comprises a WEB server, a data server, an industrial personal computer, a local discharge monitoring unit, an opening / closing coil current monitoring unit, a release current monitoring unit, an opening / closing stroke monitoring unit, an opening / closing position monitoring unit, an SF6 gas temperature and pressure monitoring unit and a sensing element. The method comprises the steps of: 1, establishing an intelligent estimation system; 2, quantifying estimation indexes; 3, determining matter elements R to be estimated; 4, determining a model classic domain; 5, determining a model node domain; 6, calculating a subjective weight; 7, calculating an objective weight; 8, determining a subjective and objective combined weight; 9, determining a degree of association of the matter elements to be estimated; 10, estimating matter elements of a subproject layer; 11, estimating matter elements of a project layer; 12, estimating matter elements of a target layer; 13, determining an operating state grade; and 14, determining a characteristic index state grade trend. The invention has the advantages of simple model, visual estimation result and strong self-improvement characteristic.

Description

technical field [0001] The invention belongs to the technical field of power transmission and transformation equipment, in particular to a SF 6 High-voltage circuit breaker operating state evaluation method and intelligent system. Background technique [0002] SF 6 High-voltage circuit breakers are important equipment in the electrical sector. As the basic work of carrying out condition-based maintenance strategies, domestic research on its condition evaluation has begun. However, the current research on the evaluation of high-voltage circuit In terms of monitoring, although there are no mature circuit breaker condition monitoring products, some units, universities and research institutes have also conducted exploratory research in this area. The research on state evaluation theory of high-voltage circuit breakers is mainly aimed at evaluating the mechanical characteristics and electrical performance of circuit breakers. In terms of mechanical characteristics, wavelet anal...

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Problems solved by technology

The research of these methods has improved the level of circuit breaker state evaluation theory, but there are still some problems. For example, in the study of circuit breaker operating state evaluation, the data volume of circuit breaker operating state parameters is relatively small; The assessed studies are limited to electrical or mechanical properties, lacking systematic and comprehensive

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