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Switch apparatus back-arc medium recovery strength nanosecond continuous pulse measuring device and method thereof

A technology of dielectric recovery strength and switching electrical appliances, which is applied in the direction of circuit breaker testing, etc., can solve the problems of increasing single pulse duration and unfavorable test results, and achieve the effects of reducing experimental costs, improving observation accuracy, and improving efficiency

Inactive Publication Date: 2009-10-14
XI AN JIAOTONG UNIV
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  • Claims
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Problems solved by technology

This method increases the duration of the single pulse and introduces additional energy, which adversely affects the experimental test results

Method used

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  • Switch apparatus back-arc medium recovery strength nanosecond continuous pulse measuring device and method thereof
  • Switch apparatus back-arc medium recovery strength nanosecond continuous pulse measuring device and method thereof
  • Switch apparatus back-arc medium recovery strength nanosecond continuous pulse measuring device and method thereof

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Embodiment Construction

[0013] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0014] see figure 1 , the test device of the present invention includes a high-voltage power supply 1, a high-voltage electronic switch 2, a charging resistor R 1 , pulse forming circuit 3, coaxial transmission circuit 11, matching resistor R 2 , DC blocking capacitor C d , capacitive voltage divider 4, peak voltage detection circuit 5, coaxial shunt 6, sample switch 7, opening control circuit 8, zero-crossing detection circuit 9, control microcontroller 10, electronic switch drive circuit 12. Capacitance C 0 and inductance L 0 in series, the inductance L 0 There is a main switch K connected in parallel 1 and ignition switch K 2 , main switch K 1 and ignition switch K 2 Connected with auxiliary switch Sa, arc ignition switch K 2 There is also a resistor R in series with the auxiliary switch Sa 3 , forming the current source of the measuring equipme...

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Abstract

The invention relates to a switch apparatus back-arc medium recovery strength nanosecond continuous pulse measuring device and a method thereof. A high-voltage electronic switch mode is adopted for controlling high-voltage pulse, and the electronic switch has the following advantages: the formed nanosecond pulse is simple and stable; the impedance is high under open-circuit condition; and the electronic switch can work under a repeated frequency mode. A designed pulse forming circuit can adjust the form of the pulse, the way of adding a matched resistance at the transmission end of the high-voltage pulse can prevent multiple reflections of the pulse, a designed capacitive voltage divider meets the need for high frequency measurement, and a peak holding circuit can record measurement requirements of high frequency continuous pulse. By adopting the experimental method, the time resolution of pulse experimental measuring medium recovery strength can also be improved, the observation accuracy of back-arc medium recovery physical process can be improved, and the quantitative analysis of time characteristic of breakdown development can be conducted. Simultaneously, due to the application of the continuous pulse, the consistency of experiment is further guaranteed, the experimental efficiency is improved, and the experimental cost is reduced.

Description

technical field [0001] The invention belongs to the field of electronic applications, and in particular relates to a nanosecond continuous pulse measurement device and method for dielectric recovery strength after arcing of switching appliances. Background technique [0002] Whether the switching device can be successfully broken depends on the relationship between the dielectric recovery process between the contacts and the system voltage recovery process at both ends of the contacts after the AC current crosses zero and the arc is extinguished: if the dielectric recovery strength exceeds the system recovery voltage , the arc will be successfully extinguished, otherwise the arc gap will break down again, causing the arc to reignite, resulting in breaking failure. Therefore, it is of great significance to study the measurement method of the after-arc dielectric recovery strength of the switchgear for the study of the law, influencing factors and improvement measures of the d...

Claims

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Application Information

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IPC IPC(8): G01R31/327
Inventor 耿英三翟小社王振兴刘志远王建华张国钢
Owner XI AN JIAOTONG UNIV
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