低压电力线载波通信中变压器问题的解决方案

针对低压电力线载波通信中诸如智能家电、电力线互联网接入等高速数据传输应用中存在的高频载波信号难以通过变压器的问题，提出了一个在一定范围内可以奏效的简单实用的方法，即在连接家庭用户的低压配电变压器处安装1个数字中继器，将该变压器一侧所连接范围内的用户数据进行解调集中．再将数据通过载波调制转发至变压器另一侧的中压线路上进行传输，使信号顺利通过变压器。这种方法可以在一定程度上克服电力线载波通信中的变压器问题，增加电力线载波通信的范围，并且兼容于现有的比较成熟的电力线载波通信技术。

Solution of transformer problem in power line carrier communication

This paper proposes a method of utilizing digital relay to make power line carrier signals pass through transformers, which can solve the transformer problem that has put a limit to the application of power line carrier communication in high data rate transmission, such as the using of intelligent home devices, internet access through power line and so on. The method of solving the above mentioned problems is to install a digital relay at the lower voltage side of a transformer, which can demodulate all signals from one side of the transformer, and turn the signals into digitalized data and then modulate the data back into signals, and send these signals to the other side of the transformer. This method can solve the transformer problems of affecting power line carrier communication to a certain extent, and it is compatible with the presently used power line carrier communication technique.