Method for extending power line carrier transmission distance

Abstract

The invention relates to a method for extending power line carrier transmission distance, a transmission line of power line carriers is changed into between an N phase and a ground wire from traditionally between a single phase and the N phase. A sending signal is connected to between the N phase and the ground through a coupling capacitor. The method changes the transmission line into between the N phase and the ground wire, basically removes interference of harmonic noise, and enables transmission distance of signals to be longer.

Description

technical field [0001] The invention belongs to the field of power carrier and relates to the extension of the transmission distance of the power carrier, in particular to a method for extending the transmission distance of the power carrier. Background technique [0002] Power Line Carrier-PLC communication is a special communication method that uses power lines as an information transmission medium for voice or data transmission. In the field of power carrier, power lines are generally divided into three categories: high, medium and low. Usually, high-voltage power lines refer to voltage levels of 35kV and above, medium-voltage power lines refer to voltage levels of 10kV or low-voltage distribution lines of 380 / 220V subscriber lines. The applicable occasion of the present invention is the situation of 380 / 220V under low-voltage power distribution. [0003] PLC is Power Line Carrier. Power Line Carrier (PLC) is a unique communication method for power systems. Power Line Ca...

AI Technical Summary

Problems solved by technology

[0004] However, in actual use of power carrier, the transmission distance is often shortened due to the interference of harmonic noise, or the received transmission signal is distorted, which greatly affects the application and popularization of power carrier.