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Vacuum circuit breaker electrical life evaluation method based on arc energy

A vacuum circuit breaker and arc energy technology, applied in circuit breaker testing, measuring electrical variables, measuring current/voltage, etc., can solve problems such as inaccurate evaluation methods, prevent breaking accidents, improve accuracy, and simplify calculations Effect

Active Publication Date: 2020-08-07
XI AN JIAOTONG UNIV
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Problems solved by technology

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a method for evaluating the electrical life of a vacuum circuit breaker based on arc energy, so as to solve the problem caused by the difficulty in realizing the online detection of the arc voltage in the existing method for evaluating the electrical life of a vacuum circuit breaker. The problem of imprecise assessment methods

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  • Vacuum circuit breaker electrical life evaluation method based on arc energy
  • Vacuum circuit breaker electrical life evaluation method based on arc energy
  • Vacuum circuit breaker electrical life evaluation method based on arc energy

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Embodiment Construction

[0031] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circums...

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Abstract

The invention discloses a vacuum circuit breaker electrical life evaluation method based on arc energy, and belongs to the field of vacuum circuit breaker electrical life evaluation. A common commercial vacuum circuit breaker arc voltage database is established based on the experimental data, and meanwhile, the arcing time and the arc current effective value are calculated, then the arc energy accumulation value of a vacuum circuit breaker in each turn-on and turn-off is calculated and is compared with an arc energy threshold value to obtain the residual electric life percentage, so that the working state of the vacuum circuit breaker is evaluated, and whether an early warning prompt is given or not is further determined. According to the method, the problem that the online arc voltage detection is difficult to realize is solved, a foundation is laid for the online monitoring of the electrical life of the vacuum circuit breaker, and the electrical life prediction precision of the vacuum circuit breaker is improved.

Description

technical field [0001] The invention belongs to the field of electrical life evaluation of vacuum circuit breakers, and relates to a method for evaluating the electrical life of vacuum circuit breakers based on arc energy. Background technique [0002] Vacuum circuit breakers have the advantages of large breaking capacity, high reliability, small size and no pollution to the surrounding environment, and have been widely used in the medium voltage field. When the vacuum circuit breaker breaks the short-circuit current, the contacts are ablated by the high temperature of the arc, and the wear is serious. If the accumulated wear is too large after repeated breaking, the arc cannot be broken normally, and the arc extinguishing chamber may explode, causing a major safety accident. The working state of the vacuum circuit breaker greatly affects the power supply reliability of the power system. In order to ensure that the circuit breaker can normally and reliably complete the openi...

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Application Information

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IPC IPC(8): G01R31/327G01R19/00
CPCG01R19/00G01R31/327
Inventor 王立军颜超王凯
Owner XI AN JIAOTONG UNIV
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