Medium voltage broadband power line carrier communication circuit

Abstract

The invention discloses a medium voltage broadband power line carrier communication circuit. The medium voltage broadband power line carrier communication circuit comprises a broadband carrier chip, a carrier amplifying unit, a carrier receiving unit, a coupling unit, and a power supply unit. The broadband carrier chip is respectively connected with the coupling unit by the carrier amplifying unit and the carrier receiving unit. The power supply unit is respectively connected with the broadband carrier chip, the carrier amplifying unit, and the carrier receiving unit. The carrier amplifying unit comprises a carrier voltage amplifying module and a carrier current amplifying module, which are in serial connection. The carrier current amplifying module comprises a first current amplifying sub-module and a second current amplifying sub-module, which are in a parallel connection. The output end of the first current amplifying sub-module and the output end of the second current amplifying sub-module are respectively connected with the coupling unit. The medium voltage broadband power line carrier communication circuit is advantageous in that a 10kV medium voltage power distribution network is used as high speed data transmission medium for communication, and is used for power amplification of high frequency broadband carrier signals in a range from 0MHz to 20MHz, and has advantages of high communication rate, good communication performance, simple circuit structure, and low implementation costs.

Description

technical field [0001] The invention relates to power line carrier communication technology, in particular to a medium-voltage broadband power line carrier communication circuit, which is used for data communication by facilities such as smart meters through medium-voltage power lines. Background technique [0002] The power line carrier communication circuit uses the power line for data communication. In order to carry the carrier signal, the carrier signal needs to be amplified. However, due to the limitation of the circuit structure and device characteristics, the traditional carrier power amplifier circuit can only amplify the signal within the range of 0~1MHz. The power amplification of low-frequency narrowband signals cannot meet the transmission rate and distance requirements of medium-voltage broadband power lines, and most of them have problems such as low communication rate, poor communication performance, complex circuit structure, and high cost. Contents of the ...

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Problems solved by technology

[0002] The power line carrier communication circuit uses the power line for data communication. In order to carry the carrier signal, the carrier signal needs to be amplified. However, due to the limitation of the circuit structure and device characteristics, the traditional carrier power amplifier circuit can only amplify the si

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