基于特征电流检测的户变关系识别终端设计与实现

Design and Implementation of User-Transformer Relationship Recognition Terminal Based on Characteristic Current Detection

针对户变关系识别难题,文章实现了一种基于微弱特征电流检测的户变关系识别终端。对特征电流信号频域特性进行仿真分析,设计了可在实际电力线路上工作的电流互感器接口电路与模拟信号调理电路,给出了适用于特征电流信号的开关键控(on-off keying,OOK)解调算法,最后对研制的样机进行了测试,结果表明特征电流接收终端能够在实际电力线上正确接收发送端发出的特征电流信号并进行记录,在户变关系识别应用中取得了较好效果。

Aiming at the difficult problem of user-transformer relationship recognition,this paper implements a user-transformer relationship recognition terminal based on weak characteristic current detection,simulates and analyzes frequency domain characteristics of characteristic current signal,and designs current transformer interface circuit and analog signal conditioning circuit which can work on actual power line.The on-off keying(OOK)demodulation algorithm suitable for characteristic current signal is given.Finally,the prototype is tested.The results show that the characteristic current receiving terminal can correctly receive and record the characteristic current signal sent by the sender on the actual power line,and has achieved good results in the application of user-transformer relationship recognition.