中压配电网载波通信的多径反射模型研究

为了利用中压配电网作为自动化的载波通信媒介，必须测量、研究中压配电网的传输特性，尤其是多径反射问题。由于中压配电网载波通信不能加装波器，因此，分支点所产生的多径反射衰耗是实现中压配电网宽带数字载波通信的主要问题之一。论文针对中压配电网的网络结构及由此产生的阻抗不匹配及传输衰减等问题，提出了一种多径反射模型。该模型仅用很少的参数就可以描述电力线信道的传输特性。实际测量中测量值与模拟值的良好吻合，表明提出的模型对中压配电网宽带数字载渡通信机的设计具有一定的指导意义。

The multipath model of middle-voltage distribution line carrier communiction

In order to assess the ability of MV(middle voltage)distribution power networks to support distribution automation using middle voltage power distribution line carrier system,the transfer characteristics,especially,multipath propagation which the branch off points and impedance mismatching cause signal reflection of the middle voltage distribution line have been investigated The multipath effect has been considered as an outstanding issue of all problems of the design of PLC systems because the line traps cannot be used in middle voltage networks This paper presents a multipath model based on the topology of the MV network,impedance mismatch and signal propagation attenuation on it This model can describe transfer characteristics of typical MV networks using only a few parameters A verification of the model at a test network demonstrates the practical value for the design of powerline carrier communication system in MV networks