摘要
低压故障电弧有引发火灾的危险,所以检测故障电弧是必要的。随着电力电子技术在低压领域的广泛应用,一些电器正常工作时的电压电流特性与故障电弧的典型特性相似,给检测工作带来了难度。研究调光灯及开关电源的工作原理可以发现,通过分析回路中电压电流在某些频率点的相位信息,可以有效判别是否发生了故障电弧。
Fire accident can arise from low-voltage arc fault, and so it is necessary to detect arc fault. As the electric power ＆ electronic technology is used widely in low voltage area, the properties of voltage and current in normal working conditions of electrical appliance closely resemble or mimic the un-normal properties created by the arc fault, so it is difficult to distinguish between normal and un-normal cases. Through studying the principle of dimmer and switch power supply, it was found that in some frequency points, by analyzing the phase of electric voltage and current it can tell if arc faults occur.
出处
《实验室研究与探索》
CAS
2007年第8期20-23,共4页
Research and Exploration In Laboratory
关键词
电弧
电弧检测
相位
arc fault
arc-fault detection
phase
