信号注入法在分接箱故障查找中的应用

摘要

针对传统的分接箱电缆故障检测方法存在的不足，文章以STC12C5A60S2单片机和波形产生芯片AD9833为核心，提出一种分接箱电缆故障检测仪。分接箱电缆故障检测仪在检测过程中，将产生的相应频率的注入信号注入到分接箱电缆中，通过测量流过短路故障电缆的电流的大小，来判断出故障的线路。该检测仪能够准确快速地实现分接箱故障电缆的检测，提高检修效率，减少检修分接箱时因停电而造成的不利影响。%Because of the disadvantages in the traditional cable fault detection method of the cable branch box, in this paper, a novel cable fault detector in the cable branch box is proposed. The detector uses consumption microcontroller STC12C5A60S2 and the waveform generation chip AD9833 as the core. The detector can detect the cable fault of the cable branch box quickly and accurately, improve the efficiency of maintenance and reduce the harmful impact during the maintenance of the cable branch box.