Low-voltage power grid meter reading system based on HomePlug AV

Abstract

The invention relates to a low-voltage power grid meter reading system based on HomePlug AV. The low-voltage power grid meter reading system based on HomePlug AV comprises a master station and a field terminal device cluster, wherein the field terminal device cluster comprises a plurality of field terminal devices A and field terminal devices B, the field terminal devices A include concentrators A and meter device clusters A, the concentrators A include head end modules A, the head end modules A include switch chips A and a plurality of broadband PLC chips A. The field terminal devices B include concentrators B and meter device clusters B A, the concentrators B include head end modules B, the head end modules B include switch chips A and a plurality of broadband PLC chips B. The low-voltage power grid meter reading system adopts internet accesses and broadband PLC, so that uplinks and downlinks of concentrator-side modules are widened, parallel meter reading becomes possible, and the meter reading speed is greatly improved.

Description

technical field [0001] The invention relates to a low-voltage power grid meter reading system, in particular to a low-voltage power grid meter reading system based on HomePlug AV, which belongs to the field of power monitoring. Background technique [0002] BPL (Broadband over power lines) is a technology that allows Internet data to be transmitted over power lines. People often refer to BPL as power line communication PLC. Broadband over Power Line communication (Broadband over Power Line), referred to as BPL, refers to the power line carrier communication with a bandwidth limited between 2-30 MHz and a communication rate usually above 1 Mbps. Power line communication technology uses the existing solid and reliable power lines as the medium of information transmission, and transmits analog or digital signals through carrier waves. The power line can be used directly without rewiring, the networking is simple and fast, the cost is relatively low, the application range is w...

AI Technical Summary

Problems solved by technology

The broadband PLC communication scheme has inherent technical and application advantages, and the specific description is as follows: (1) Strong anti-attenuation ability. Compared with narrowband power line communication technology, broadband PLC has strong anti-attenuation ability. PLC can reach 95dB; (2) The communication rate is high. Generally, the narrowband power line communication rate is about 1k~4kbps, the broadband PLC can reach the PHY communication rate of 200Mbps, the application layer communication rate can reach up to 10Mbps, and the field operation rate is at least about 2~3Mbps. , so that it can carry more and more complex power line data applications; (3) automatic networking, high number of relay stages, generally 7 levels of relay stages for narrowband power line communication, and susceptible to power line transient impedance, noise and other environmental influences , point-to-point interaction data shortage and other reasons, point-to-point communication is unstable

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