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中文摘要：
设计了包含电流回路、自然换流回路以及高电压回路的10 kV/10 kA试验系统,用于高速开断器的介质恢复试验。分析得出了高速开断器对于试验系统提出的需求：为试品制造人工电流过零点,且在所要求的介质恢复时间内一直维持电流过零点;电压源需要模拟灭弧熔断器的弧压;介质恢复开始后,经过指定的延时后再投入电压源。分析了电流回路的电气参数,确定了参数选取方案;提出了自然换流回路中避雷器的选型依据;总结了串联二极管组件的反向截止规律,进行了高电压回路点火球隙的性能试验。系统调试结果证实了该介质恢复试验系统具备了完成额定10 kV/10 kA高速开断器介质恢复试验的能力。
英文摘要：
A 10 kV / 10 kA dielectric recovery test system is designed for the dielectric recovery experiment of high-speed isolators,which consists of the current loop,natural current-commutation loop and high-voltage loop. The requirements of high-speed isolators for the dielectric recovery test system are analyzed：the artificial current ZCP（Zero Crossing Point） should be created and maintained during the dielectric recovery period;the arc voltage of arc-extinguish fuse should be simulated by the voltage source;the voltage source should be switched on with a delay of set time after the dielectric recovery starts. The parameters of current loop are analyzed and the parameter selection scheme is determined;the type selection criterion of lightning arrester used in the natural current-commutation loop is proposed;the reverse check law of serial diode is summarized and the performance test is carried out for the gap of high-voltage ignition ball. The results of system commissioning verify that the designed system is capable of testing the dielectric recovery of 10 kV / 10 kA high-speed isolators.
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