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Closing and aging test device for vacuum circuit breaker and aging parameter determination method

A vacuum circuit breaker, circuit breaker technology, applied in the direction of circuit breaker testing, testing dielectric strength, etc.

Inactive Publication Date: 2022-07-29
CHINA ELECTRIC POWER RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The present invention proposes a closing and aging test device for vacuum circuit breakers and a method for determining aging parameters to solve the problem of how to perform closing and aging tests on vacuum circuit breakers

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  • Closing and aging test device for vacuum circuit breaker and aging parameter determination method
  • Closing and aging test device for vacuum circuit breaker and aging parameter determination method
  • Closing and aging test device for vacuum circuit breaker and aging parameter determination method

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Embodiment Construction

[0069] Exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for the purpose of this thorough and complete disclosure invention, and fully convey the scope of the invention to those skilled in the art. The terms used in the exemplary embodiments shown in the drawings are not intended to limit the invention. In the drawings, the same elements / elements are given the same reference numerals.

[0070] Unless otherwise defined, terms (including scientific and technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it is to be understood that terms defined in commonly used dictionaries should be construed as having meanings consistent with the context in the related art, and should not be construed as idealized or overly formal...

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Abstract

The invention discloses a closing and aging test device for a vacuum circuit breaker and an aging parameter determination method. The device comprises an energy storage capacitor, a discharge reactor, a closing loop control switch, a metal oxide voltage limiter and a current transformer. The method comprises the following steps: acquiring a first pre-breakdown time when a test voltage is a phase voltage, a second pre-breakdown time when the test voltage is a different preset voltage, and a real-time closing inrush current; obtaining first pre-breakdown arc energy based on the closing inrush current and the first pre-breakdown time of the capacitor bank back-to-back closing type test corresponding to the phase voltage; acquiring second pre-breakdown arc energy based on the second pre-breakdown time and the real-time closing inrush current; calculating the ratio of the second pre-breakdown arc energy to the first pre-breakdown arc energy, and determining a pre-breakdown energy coefficient; and based on the pre-breakdown energy coefficient, determining an aging test voltage and an aging test current for aging the test breaker.

Description

technical field [0001] The present invention relates to the technical field of electrical equipment testing, and more particularly, to a closing aging test device for a vacuum circuit breaker and a method and system for determining aging parameters. Background technique [0002] The vacuum circuit breaker is simple and economical, has strong opening and closing ability, and is suitable for frequent operation. The contacts of the vacuum circuit breaker are easy to weld when closing the capacitor bank, and the fracture is prone to heavy breakdown when the capacitor bank is disconnected, which may cause the capacitor bank breakdown, explosion and other vicious accidents, threatening the safety of equipment and the operation of the power grid. According to the statistics of the professional power company test station, the heavy breakdown rate of 12kV vacuum circuit breaker is about 0.99%, and the heavy breakdown rate of 40.5kV vacuum circuit breaker is as high as 4.79%, and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/327G01R31/12
CPCG01R31/327G01R31/1227
Inventor 李志兵张然刘北阳徐晓东田阳黄河田宇和彦淼
Owner CHINA ELECTRIC POWER RES INST
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