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Carrier wave communication coupling circuit based on inductive coupling

A technology of carrier communication and coupling circuit, which is applied in the direction of distribution line transmission system, etc., can solve the problems of carrier communication failure and the influence of capacitive coupling mode, and achieve the effect of poor solution and improved communication effect

Inactive Publication Date: 2017-03-15
SHANGHAI XINYING POWERTECH
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Capacitive coupling is susceptible to load on the line
In the photovoltaic power generation system, the DC side of the inverter is connected with a common-mode magnetic ring and a supporting capacitor, and the supporting capacitor has a strong attenuation of the high-frequency carrier signal, resulting in carrier communication failure.

Method used

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  • Carrier wave communication coupling circuit based on inductive coupling
  • Carrier wave communication coupling circuit based on inductive coupling
  • Carrier wave communication coupling circuit based on inductive coupling

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Embodiment

[0022] This patent mainly solves the low success rate of carrier communication in the current photovoltaic inverter system, and designs a coupling circuit in the form of inductive coupling. The inductive coupling circuit is as follows: figure 2 Shown:

[0023] Inductive coupling, that is, transformer coupling, uses the principle of electromagnetic induction to realize the transformation of electrical signals between the primary and secondary windings. figure 2 Among them, the inductive coupler T1 at the transmitting end couples the high-frequency carrier signal to the power line, and the inductive coupler T2 at the receiving end couples the high-frequency carrier signal on the power line to the receiving end, thereby realizing the communication between the transmitting end and the receiving end.

[0024] The inductive coupling circuit is mainly composed of a magnetic core and a winding. The efficiency of the signal inductive coupling method mainly depends on the following fa...

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Abstract

The invention relates to a carrier wave communication coupling circuit based on inductive coupling. The circuit is used to carry out carrier wave communication on a power line of photovoltaic power generation. The coupling circuit comprises a carrier wave signal transmitting terminal, a transmitting terminal inductance coupler, a receiving terminal inductance coupler and a carrier wave signal receiving terminal. The carrier wave signal transmitting terminal is connected to a primary side of the transmitting terminal inductance coupler. A secondary side of the transmitting terminal inductance coupler is connected to a primary side of the receiving terminal inductance coupler through a power line. A secondary side of the receiving terminal inductance coupler is connected to the carrier wave signal receiving terminal. Compared to the prior art, the circuit possesses advantages that a coupling effect is good, the circuit is not influenced by a power line load fluctuation and so on.

Description

technical field [0001] The invention relates to the field of power line carrier communication, in particular to a coupling circuit for carrier communication based on inductive coupling. Background technique [0002] In the photovoltaic power generation system, solar panels and components are first connected in series to form a photovoltaic series, and then several photovoltaic series are connected in parallel to the combiner box. After converging in the combiner box, the DC is converted into AC, to achieve parallel connection with the grid. [0003] As the scale of the grid-connected photovoltaic power generation system increases, the distribution area becomes larger and larger, and the number of solar panels, components and control devices increases. Therefore, it is very important to realize the intelligent monitoring of the entire system. At present, many companies use power line carrier communication (PLC) to monitor the entire photovoltaic power generation system. Comp...

Claims

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Application Information

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IPC IPC(8): H04B3/56H04B3/54
CPCH04B3/54H04B3/56
Inventor 张东海
Owner SHANGHAI XINYING POWERTECH
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