Medium-voltage power line impedance test system based on medium-voltage carrier communication device

Abstract

The invention discloses a medium-voltage power line impedance test system based on a medium-voltage carrier communication device. According to the technical scheme, the system comprises a medium-voltage carrier communication terminal and medium-voltage signal coupling equipment, the medium-voltage carrier communication terminal is used for detecting sending voltage and current, the SOC control module analyzes and processes the sending voltage and current, the impedance state of the 10kV medium-voltage power line is calculated, and the SOC control module controls the relay control module to dynamically adjust the impedance matching network according to the maximum sending power matching requirement; the medium-voltage signal coupling equipment is used for isolating high voltage of a medium-voltage power line and providing the high voltage to the medium-voltage carrier communication terminal communication interface. According to the invention, maximum transmission of carrier power is maintained, and the reliability of the medium-voltage carrier communication system is improved.

Description

Technical field [0001] The invention relates to the field of medium voltage carrier communication, and relates to a medium voltage power line impedance test system based on a medium voltage carrier communication device. Background technique [0002] Power line carrier communication is a communication method that uses power lines as transmission channels to realize data transmission, while medium voltage carrier communication systems use widely distributed medium voltage distribution lines as transmission channels. There is no need to re-lay communication lines. Signals are transmitted in distribution lines. , Regardless of the geographical environment, the communication can be extended wherever the distribution line is installed, saving the cost of laying cables, erecting towers, and digging the ground. And because the distribution line belongs to the power company, it can be completely controlled by the power company, which is easy to manage. As a dedicated wired communication,...

AI Technical Summary

Problems solved by technology

[0004] At present, the research on the characteristics of the power line carrier channel is mainly concentrated in the field of low-voltage power lines. Due to the limitations of application range, voltage level and other factors, there are very few researches on the characteristics of 10kV medium-voltage distribution lines. Based on the analysis of theories and concepts, few of them involve the realization of specific methods and schemes or have great technical difficulties in the actual operation and realization of engineering applications

Due to the existence of industrial frequency transformers, the line characteristics (such as noise, impedance, attenuation, etc.) of 10kV medium-voltage distribution lines are very different from the channel characteristics of low-voltage power lines, and the empirical results of low-voltage research cannot be directly applied

Images