Power carrier communication system of cable shielding layer

Abstract

The invention discloses a power carrier communication system of a cable shielding layer, which comprises a plurality of power supply cable connectors, power supply cables, a plurality of cable shielding layer grounding wires, a plurality of inductive couplers, a plurality of power line carrier machines, and a plurality of data terminal equipment, wherein each power supply cable connector is in circuit connection with a cable inside a corresponding distribution substation; the power supply cables are in circuit connection between the power supply cable connectors, and the cable shielding layer is formed by the power supply cables and the a plurality of power supply cable connectors; the cable shielding layer grounding wires are in circuit connection with the corresponding power supply cable connectors; each inductive coupler comprises a primary side winding and a secondary side winding, one end of the primary side winding is earthed, and the other end of the primary side winding is in circuit connection with the corresponding cable shielding layer grounding wire; the power-line carrier machines are in circuit connection with the secondary side windings of the corresponding inductive couplers; and the data terminal equipment is in circuit connection with the power line carrier machines. According to the invention, by adopting the cable shielding layer to perform long-distance information transmission of medium-voltage carrier signals, the passage state is good, the attenuation is low and the impedance change is low.

Description

technical field [0001] The invention relates to a carrier communication technology used in a power system, in particular to a cable shielding layer power carrier communication system. Background technique [0002] Medium-voltage power line carrier communication uses 10KV transmission lines as the carrier communication medium, and does not generate material and construction costs on the channel. It is the most distinctive communication method in the power system; The line environment has undergone a number of technological innovations in modulation and demodulation, codec, anti-interference and other technologies, making power line carrier communication an economical, convenient, safe and reliable distribution automation communication method. In the power system, the power line carrier communication channel is mainly used to transmit telecontrol data, and cooperate with the terminal equipment in the distribution station to realize functions such as telemetry, remote signaling...

AI Technical Summary

Problems solved by technology

[0007] The distribution network is bifurcated and there are many "T" contacts, and the signal attenuation is serious after being injected into the line of the same bus;

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