Method and system for evaluating on-off performance of high-voltage circuit breaker, and medium

A high-voltage circuit breaker and performance technology, applied in the field of high-voltage circuit breaker breaking performance evaluation, can solve the problems of high-voltage circuit breakers with high accuracy, wide applicability, and low cost, and achieve high scientificity, wide applicability, and low cost. low effect

Active Publication Date: 2021-03-19
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID NINGXIA ELECTRIC POWER COMPANY +2
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  • Application Information

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Problems solved by technology

[0005] Embodiments of the present invention provide a method, medium and system for evaluating the breaking performance of a high-voltage circuit breaker, so as to solve the problem th

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  • Method and system for evaluating on-off performance of high-voltage circuit breaker, and medium
  • Method and system for evaluating on-off performance of high-voltage circuit breaker, and medium
  • Method and system for evaluating on-off performance of high-voltage circuit breaker, and medium

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Embodiment Construction

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0020] The embodiment of the invention discloses a method for evaluating the breaking performance of a high-voltage circuit breaker. The high-voltage circuit breaker of the embodiment of the present invention is a high-voltage SF 6 For circuit breakers, the breaking performance refers to the asymmetrical short-circuit current breaking performance. Specifically, such as figure 1 As shown, the evaluation method of breaking performance of the high-volta...

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Abstract

The invention discloses a method and a system for evaluating the on-off performance of a high-voltage circuit breaker, and a medium. The evaluation method comprises the following steps: establishing asimplified enthalpy flow model for switching on/off asymmetric short-circuit current of the high-voltage circuit breaker according to related parameters of the high-voltage circuit breaker; performing simulating by adopting a simplified enthalpy flow model, simulating asymmetric short-circuit current, and obtaining curves of arc current and arc voltage in a current zero region along with time change; establishing an arc black box model; extracting parameters of the electric arc black box model according to the curve of the electric arc current and the electric arc voltage in the current zeroarea along with time change; replacing the electric arc of the high-voltage circuit breaker with the electric arc black box model, and establishing a circuit simulation model for simulating asymmetricshort-circuit current; performing simulating by adopting the circuit simulation model to generate an asymmetric short-circuit current to obtain a current waveform; and evaluating the asymmetric short-circuit current breaking capacity of the high-voltage circuit breaker according to the current waveform. The method and system have the advantages of being high in accuracy, wide in applicability, high in efficiency and low in cost.

Description

technical field [0001] The invention relates to the technical field of high-voltage circuit breakers, in particular to a method, medium and system for evaluating the breaking performance of high-voltage circuit breakers. Background technique [0002] With the development of the power system, the scale of the power grid continues to expand, and the connection between power sources is getting closer. The X / R ratio (reactance-to-impedance ratio) of the grid continues to increase, the DC component decay time constant of the short-circuit current in the grid continues to increase, the problem of excessive short-circuit current in power and load-intensive areas is prominent, and the hidden danger of insufficient breaking capacity of circuit breakers is prominent. It is an unavoidable major technical and economic problem in the development of power grid. At the same time, the main protection action time of the ultra-high voltage power grid is continuously shortened, and the DC com...

Claims

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Application Information

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IPC IPC(8): G06F30/367G06F30/25H01H33/666
CPCG06F30/367G06F30/25H01H33/666
Inventor 马飞越相中华刘志远丁培黎炜严南征项彬姚晓飞宋仕军朱洪波罗金辉赵庆倪辉牛勃周秀陈磊魏莹孙尚鹏刘博李文刘威峰田禄
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID NINGXIA ELECTRIC POWER COMPANY
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