【摘要】 考虑到工频电场变化和电晕导致的高频电场变化两种情况,对运行中真空灭弧室的内部气体压力变化进行了在线诊断。各探测点与主机之间用光纤网络连接,巡回检测。采用高速数值采集和软件数字信号处理以提高准确度。电场信号采集部分和信号传输部分采用电气隔离,可耐受系统工频电压和过电压。更多还原

【Abstract】 Considering two cases, one the power frequency electric field varying, the other the high-frequency electric field varying caused by corona, this paper realizes the on-line diagnosis on the variation of internal gas pressure of vacuum interrupter in service. The optical fibre network is used to connect the measured points with the host computer. Each point is checked in series. The accuracy is improved through adopting high-speed sampling board and digital signal processing technology. The acquisition section of electric field signal is isolated from the section of signal transmission electrically, which can withstand the rated power-frequency voltage and other overvoltage.更多还原