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The chaos characteristic of vacuum circuit breaker (VCB) under different interruption conditions in synthetic circuit experiment is researched. Using four parameter and two parameter method, comparing the influence of the metal vapor arc model, the variations of voltage and current for different VCBs are obtained. And the chaos in synthetic circuit experiment for the demonstrated VCBs based on the...
In order to explain the mechanism of high voltage interrupter, a particle in cell method is used in our work to simulate the breakdown process before arc formation of vacuum and SF6 circuit breaker. The electrons and ions which play vital roles in this process are traced by Newton equation. The electrons from field emission, impact ionization and secondary electron emission are all considered in our...
Based on the theories of fractal and gas discharge, microscopic morphology of vacuum arc, the process of arc formation and development of discharge channel in the vacuum circuit breaker are simulated. The effects of temperature and electromagnetic field on the arc are also considered. The opening stroke is 10 mm in our work. Voltage is 75 kV, and current is 1 kA. The effects of temperature on the...
This paper presents a novel short circuit current limiting device with series compensation, which is composed of a vacuum circuit breaker with a short closing time, a compensation capacitor and a limiting reactor. The vacuum circuit breaker with a short closing time is connected in parallel with the compensation capacitor and controls either the series compensation or the short circuit current limitation...
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