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SF6 circuit breaker arc extinguish chamber service life prediction method based on arc energy

A technology for arc energy and life prediction, applied in circuit breaker testing, measuring electrical variables, instruments, etc., can solve the problems of lack of comprehensive consideration of arc burning time and arc voltage, and only focus on current amplitude, etc., to achieve online Status evaluation, elimination of static and electromagnetic noise, effects of accurate arc voltage

Active Publication Date: 2021-12-17
国网河北省电力有限公司雄安新区供电公司 +2
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  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that it only pays attention to the current amplitude, but lacks comprehensive consideration of arcing time and arc voltage.

Method used

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  • SF6 circuit breaker arc extinguish chamber service life prediction method based on arc energy
  • SF6 circuit breaker arc extinguish chamber service life prediction method based on arc energy
  • SF6 circuit breaker arc extinguish chamber service life prediction method based on arc energy

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Embodiment Construction

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. The following description of at least one exemplary embodiment is merely illustrative in nature and in no way serves as any limitation of the application, its application or uses. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the scope of protection of this application.

[0042]It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural,...

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Abstract

The invention discloses a SF6 circuit breaker arc extinguish chamber service life prediction method based on arc energy. The method comprises the following steps: calculating rated accumulated arc energy; calculating electric arc energy borne by the circuit breaker; and obtaining the residual service life of the arc extinguish chamber by the ratio of the arc energy born by the circuit breaker to the rated accumulated arc energy. A device for measuring the arc energy on line is used for measuring the arc voltage, and a current transformer is used for measuring the arc current, so that the arc energy value is calculated on line. On the basis, the novel method for predicting the service life of the arc extinguish chamber is verified in an artificial short-circuit test. The test result shows that the life prediction result of the new method is better than that of the traditional method and is more consistent with the actual situation. The arc voltage continuously changes along with the arc current, so that the arc energy is more suitable for life evaluation. The method is favorable for realizing online state evaluation of the arc extinguish chamber of the circuit breaker.

Description

technical field [0001] The present invention relates to a SF based on arc energy 6 The invention discloses a method for predicting the life of an arc extinguishing chamber of a circuit breaker, belonging to the technical field of evaluating the arc extinguishing chamber of a circuit breaker. Background technique [0002] High-voltage circuit breakers are the most important protection and control equipment in power systems. With the extension of operating time, the life of SF6 circuit breakers has become increasingly prominent. The failure of circuit breakers will cause the expansion of the scope of accidents and reduce the reliability of the power grid. Therefore, effective circuit breaker status assessment is of great significance for preventing accidents and improving grid stability. The circuit breaker consists of three parts: arc extinguishing chamber, control unit and operating mechanism. [0003] Most circuit breaker failures occur in the interrupter. Compared with ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G01R31/327G06F119/04
CPCG06F30/20G01R31/3271G06F2119/04Y04S10/50
Inventor 李振伟王晶赵天翊赵树军单保涛陶陈彬马隽
Owner 国网河北省电力有限公司雄安新区供电公司
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