配电网双向工频通信系统入站信息检测技术的研究

Research on Information Detecting Technique for Check-in Station in Two Way Automatic Communication System for Power Distribution Network

双向工频通信系统的入站信号是指从用户端发送给子站的信号 ,入站信号由调制在电网负载电流波形上的电流脉冲表示 ,入站信号来自用户端 (千家万户 )。检测入站信号时 ,就是要检测调制信号的有无 ,对调制信号本身的大小和形状并不过多要求。从信号检测原理而言 ,入站信号的检测过程属于已知信号的检测。

The check-in signal for two-way automatic communication system refers to the signal the user sent to the sub-station.Check-in signal,coming from the users,is displayed as current impulse modulated on the current waveform of the power network load.In detecting check-insignal,it is important to detect the modulated signal positive or negative;it is not so strict as to the size and form of the modulated signal.With respect to the signal detecting principle,the detecting procedure of check-in signal is a detection of known signal.Currently this communication system mainly modulated the signals by time domain digital difference method.