基于DSP的直流短路故障电流快速识别装置

Development of Rapid Identification Device About DC Short Circuit Fault Current Based on DSP

根据直流系统短路故障电流的特点,设计了以DSP为核心,利用电流上升率和电流幅值判断直流短路电流的快速识别装置。该装置采用自制PCB罗氏线圈和霍尔传感器采集电流信号,经放大滤波后输入DSP控制电路运算分析,输出相应动作信号,在此基础上完成了软件设计。试验证明,该装置判断准确,稳定可靠,响应迅速。

According to the characteristics of short circuit fault current in DC system, a rapid identification device about DC short circuit current was designed based on DSP, judging with the current rate of rise and the amplitude of the current. The device adopts the PCB Rogowski coil and the Hall sensor to collect the current signal. After being amplified and filtered, the signal then inputted to the DSP control circuit to analyze, a corresponding operation signal was outputted. The software was designed. The testing results show that the device can identify short circuit current accurately, quickly and reliably.