Low-voltage grid meter reading data collecting method based on HomePlug AV

Abstract

The invention relates to a low-voltage grid meter reading data collecting method based on HomePlug AV. A system is powered on, carrier node ammeters send signals A for requiring to be endowed with terminal device identification to a broadband PLC chip of a concentrator, the broadband PLC chip sends terminal device identification information, the carrier node ammeters send signals B for requiring to obtain an encryption secret key to the broadband PLC chip, the broadband PLC chip sends member secret key information, the carrier node ammeters successfully log in and get online, a HomePlug AV local area network is formed, the concentrator uplinks through the HomePlug AV local area network to collect parallel meter reading data of the carrier node ammeters, and the concentrator uplinks through a GPRS or CDMA or Ethernet to convey parallel meter reading data to a master station. By means of an internet access and a broadband PLC, the uplink and downlink of an end module of the concentrator are enlarged, parallel meter reading becomes possible, and the meter reading speed is greatly increased.

Description

technical field [0001] The invention relates to a low-voltage power grid meter reading data acquisition method, in particular to a low-voltage power grid meter reading data acquisition method based on HomePlug AV, which belongs to the field of electric 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 (BPL), referred to as BPL, refers to 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 appli...

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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