一种新型的拓扑识别设备

A New Topology Recognition Circuit

为实现台区自动拓扑识别,提出了一种新型的拓扑识别设备,充分地利用了变压器隔离的优势,采用H桥驱动变压器获得投切电流,最终使用有源滤波电路还原投切波形。实际测试与采样得到的波形是非常好的正弦波,没有过冲和振铃等现象,方便后续软件的处理,从而完成拓扑识别的功能。整个设备具有小型化、低功耗以及低成本等优点。

In order to realize the automatic topology identification of the station area,a new topology identification circuit is proposed,which makes full use of the advantages of transformer isolation,uses the H-bridge to drive the transformer to obtain the switching current,and finally uses the active filter circuit to restore the switching waveform.The waveform obtained from the actual test and sampling is a very good sine wave without overshoot,ringing and other phenomena,which is convenient for subsequent software processing,so as to complete the function of topology identification.The whole circuit has the advantages of miniaturization,low power consumption and low cost。