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Method for estimating operating state of SF6 high-voltage circuit breaker and intelligent system
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A high-voltage circuit breaker, operating state technology, applied in the direction of instruments, special data processing applications, electrical digital data processing, etc., can solve the research limitations of circuit breaker operating state evaluation of electrical performance or mechanical performance, lack of systematic and comprehensive, Problems such as the small amount of data of circuit breaker operating state parameters
Inactive Publication Date: 2014-04-02
SHENYANG POLYTECHNIC UNIV
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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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[0083] The present invention is described in detail in combination with specific embodiments and accompanying drawings.
[0084] Such as figure 2 The process flow of the method for evaluating the operating state of a high-voltage circuit breaker of the present invention is shown.
[0085] According to the high-voltage circuit breaker operating state online monitoring system of the present invention, the state parameter information and operating information of the high-voltage circuit breaker are collected, namely figure 1 and 3 As shown, the system adopts a distributed network structure. The real-time data is transmitted to the industrial computer through the RS485 bus using MODBUS. Intranet users can set and view the monitoring data on the data server according to the authority, and external network users can set and view the monitoring data on the WEB server according to the authority. Monitoring data, each monitoring unit adopts DSP2812 single-chip integrated development...
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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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