UWB power carrier communication method and system

Abstract

The invention discloses an ultra-broadband power carrier communication method and system thereof, which uses the "barrel-shaped" ionization field existing around the high-voltage power line to carry out carrier communication, S1, making a barrel-shaped metal coupler, and the barrel-shaped metal coupler is one end A metal barrel that is open and has a lid on the other end, and the lid has a central hole; the inner wall of the metal barrel and the inner surface of the lid are coated with insulating material, and the thickness of the insulating material meets the insulation requirements; S2, in the same high-voltage power line Barrel-shaped metal couplers are respectively installed at each end of each end to realize inductive coupling between the external signal electric field and the "barrel-shaped" ionization field of the high-voltage power line; The connecting terminal and the high-voltage communication cable are connected with the ultra-high-frequency high-speed power carrier communication transceiver, so that multi-site ultra-wideband communication can be performed. The invention has the advantages of safe and stable signal coupling, communication channel bandwidth and stable internal impedance.

Description

technical field [0001] The invention relates to the field of power carrier communication, in particular to an ultra-wideband power carrier communication method and system thereof. Background technique [0002] Power Line Carrier (English Power Line Carrier, referred to as PLC) communication is the use of high-voltage power lines (in the field of power carrier usually refers to the voltage level of 35kV and above), medium voltage ) as a special communication method for voice or data transmission as an information transmission medium. Utilizing the existing power lines, there is no need to re-establish the network, as long as there are power lines, data transmission can be performed. It has technical advantages such as flexibility and economy, and has been widely used in power distribution communication networks with a wide coverage and a large number of nodes. [0003] However, the traditional power carrier communication cannot fully meet the current high reliability and rea...

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Problems solved by technology

[0003] However, the traditional power carrier communication cannot fully meet the current high reliability and real-time communication requirements of power communication, and the following problems exist in the application process:

[0004] 1. The distribution transformer has a blocking effect on the power carrier signal, so the power carrier signal can only be transmitted within the power supply area of ​​a distribution transformer, that is, the power line carrier communication signal cannot communicate with each other at various voltage levels;

[0005] 2. Our country uniformly stipulates that the frequency range of power line carrier communication is 40-500KHz, with narrow bandwidth and low data transmission rate;

[0006] 3. Due to the complex topology of the distribution network, numerous connected loads and frequent changes, the power line channel will be affected by the superposition of various noise signals with different properties, resulting in continuous, periodic, random and variable channel noise. features

The PLC coupler is an important part of connecting the communication equipment with the power line, but its equipment is complicated, and the wave trap, combined filter, coupling capacitor, etc. are easily damaged by lightning discharge breakdown; and the general spread spectrum carrier, OFDM, etc. Broadband signals are poorly matched to the impedance characteristics of these devices, which affects long-distance communication

Even if the signal pre-distortion method is used to match the common bandwidth distortion of the line and broadband filtering, the communication cannot be stabilized due to interference such as continuous discharge during climate change, which seriously affects the application of system measurement and control.

[0008] Therefore, due to the inherent signal interference, attenuation and unstable communication channels of the power line carrier communication, the real-time and reliability are poor, and it cannot meet the needs of power communication, let alone the high reliability application in the ubiquitous power Internet of things.

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