Power line carrier (PLC) communication method and device

Abstract

The invention provides a power line carrier (PLC) communication method and device. The method comprises the following steps: attenuating signal detection step: sending pilot frequency signals and receiving the pilot frequency signals after the pilot signals are transmitted by a power grid, and carrying out the attenuating signal detection on the received pilot frequency signals to acquire frequency bands with strong attenuation; interference signal detection step: collecting signals and carrying out interference signal detection so as to acquire frequency bands with strong interference; unionset taking step: taking a union set for the frequency bands with the strong attenuation and the frequency bands with the strong interference, wherein the frequency bands in the union set are frequency bands which are required to avoid; and communication step: modulating signals on frequency bands out of the frequency band union set, and carrying out normal communication. According to the invention, the interferences of signal attenuation frequency bands and interference signal frequency bands are avoided, and the instantaneity, the validity, the safety and the reliability in the process of data transmission are realized. The method and device provided by the invention are beneficial to the transmission of high-speed data, words, images and other multimedia service signals on transmission channels in the power grid.

Description

【Technical field】 [0001] The present invention relates to a communication method and device, in particular to a power carrier communication method and device. 【Background technique】 [0002] Smart grid is the intelligent transformation of traditional power grid. It uses modern communication technology, advanced sensing and measurement technology, mathematical optimization method based on game theory, real-time power distribution control, dispatch management and decision-making for the power grid; it In order to fully meet the user's demand for power and optimize resource allocation, ensure the safety, reliability and economy of power supply, meet environmental protection constraints, ensure power quality, and adapt to the development of the power market, etc., to achieve reliable, economical, Clean, interactive power supply and value-added services. [0003] A power line communication (Power Line Communication) technology has been proposed in modern communication technologi...

AI Technical Summary

Problems solved by technology

However, due to the inherent characteristics of the low-voltage distribution network, it is quite difficult to achieve safe and reliable data transmission on it

[0004] To sum up, compared with the traditional power grid, the smart grid has more communication functions. However, using the grid power line as the communication channel has disadvantages such as poor transmission signal environment, serious attenuation, large impedance change, complex interference, and large time-varying.

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