TPLC based power line power frequency communication system

A technology of power frequency communication and power line, applied in the field of power line power frequency communication system, can solve the problems of difficult implementation, poor anti-interference ability, complex structure, etc., and achieve the effects of small noise energy, increased transmission distance, and simple network topology

Active Publication Date: 2015-09-16
WASION GROUP HLDG
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

This patented technology does make the transmission distance longer and the communication reliability is also improved, but the technical structure is complex and difficult to implement. The traditional RS-485 interface is used to connect the acquisition terminal and the user terminal, and the anti-interference ability is poor

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  • TPLC based power line power frequency communication system
  • TPLC based power line power frequency communication system
  • TPLC based power line power frequency communication system

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Embodiment Construction

[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0026] figure 1 Reflecting the system architecture of the present invention, a TPLC power line power frequency communication system should be installed under each transformer station area. The system includes concentrators, single-phase meters, three-phase meters, master modules and slave modules; the master modules are installed in centralized The terminal communicates with the concentrator through the communication interface. Both the main module and the concentrator are directly connected to the power line. The slave module is installed at the end of the single-phase electric energy meter or three-phase electric energy meter, and communicates with the corresponding single-phase electric meter or three-phase electric energy meter through the communication interface. Communication, slave modules, single-phase meters and three-phase meters are all directly co...

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Abstract

The invention discloses a TPLC based power line power frequency communication system, which is characterized in that the system is installed under each transformer area, a master module is installed at a concentrator, and a slave module is installed at each terminal meter; the master module is provided with an inbound signal detection circuit, an outbound signal modulation circuit and a processor; each slave module is provided with an inbound signal modulation circuit, an outbound signal demodulation circuit and a processor; and the concentrator sends outbound signals to the slave modules through the master module and detects inbound signals sent by the slave modules, and each terminal meter sends the inbound signals to the master module through the slave module and detects the outbound signals sent by the master module. According to the invention, the modulated pulse signal frequency is far lower than the conventional power carrier signal frequency, the system is not susceptible to influences of impedance of a power distribution network, low-frequency signals are not attenuated, the transmission distance is greatly increased, power grid noise energy in a corresponding frequency band is small, the communication success rate is much higher than that of a traditional carrier communication method, point-to-point communication is used directly, networking is not required, and network topology is simple.

Description

technical field [0001] The invention relates to the field of power line transmission, in particular to a power line power frequency communication system. Background technique [0002] TPLC is a power line communication technology based on TWACS technology; TWACS is a two-way power frequency automatic communication system (Two-Way Automated Communications System), which uses the method of power frequency voltage fundamental wave zero-crossing modulation to realize signal modulation and demodulation. However, the traditional TWACS communication master node is installed at the medium-voltage end of the distribution transformer in the substation, and sends signals to the slave nodes in the form of voltage modulation; the slave node is installed on the low-voltage user side, and sends signals to the master node in the form of current modulation. The master node extracts the signal through CT (current transformer). The transmission of signals needs to cross transformers in the st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B3/54
Inventor 王学信张建波鲍勃·理查德森林垂涛
Owner WASION GROUP HLDG
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