CN106506048A - A kind of carrier communication termination power based on inductive - Google Patents
A kind of carrier communication termination power based on inductive Download PDFInfo
- Publication number
- CN106506048A CN106506048A CN201610994168.8A CN201610994168A CN106506048A CN 106506048 A CN106506048 A CN 106506048A CN 201610994168 A CN201610994168 A CN 201610994168A CN 106506048 A CN106506048 A CN 106506048A
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- China
- Prior art keywords
- inductive coupler
- inductive
- transmitting terminal
- receiving terminal
- termination power
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
- H04B3/56—Circuits for coupling, blocking, or by-passing of signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
Abstract
The present invention relates to a kind of carrier communication termination power based on inductive, in order to carry out carrier communication on the electric lines of force of photovoltaic generation, the termination power includes carrier signal transmitting terminal, transmitting terminal inductive coupler, receiving terminal inductive coupler and carrier signal receiving terminal, described carrier signal transmitting terminal is connected with the former limit of transmitting terminal inductive coupler, the secondary of transmitting terminal inductive coupler is connected with the former limit of receiving terminal inductive coupler by electric lines of force, and the secondary of described receiving terminal inductive coupler is connected with carrier signal receiving terminal.Compared with prior art, the present invention has that coupling effect is good, do not affected by the electric lines of force fluctuation of load.
Description
Technical field
The present invention relates to power line carrier communication field, couples more particularly, to a kind of carrier communication based on inductive
Circuit.
Background technology
In photovoltaic generating system, solar panels and component are first together in series, and constitute photovoltaic tandem one by one, if then again will
Dry photovoltaic tandem parallel connection accesses header box, after confluxing, becomes to exchange by direct current by DC-to-AC converter, realize in header box
In parallel with electrical network.
As the scale of grid-connected photovoltaic power generation system increases, distribution area is increasing, solar panels and component and control
Device increasing number, therefore realizes that the Intellectualized monitoring to whole system is most important.A lot of companies are carried using electric lines of force at present
Wave communication (PLC) mode realizes the monitoring to whole photovoltaic generating system, and relative to other communication modes, PLC technology has into
The advantages of this is low, construction is simple, maintenance work is little, flexibility ratio is high, PLC technology is widely used.
In photovoltaic generating system, high-frequency carrier signal is loaded on electric lines of force and from electric lines of force by carrier module
During being transferred to carrier module, it is required for through overcoupled circuits.Termination power plays two effects in the entire system：
(1) high-frequency carrier signal and direct current forceful electric power are isolated；(2) guarantee the loading efficiency ratio in the frequency band intercarrier signal for requiring
Higher.
In current photovoltaic generating system, more employing capacitive coupling, capacitance coupling circuit are as shown in Figure 1.Should
In circuit, safety electric capacity C1 can allow high-frequency carrier signal to pass through, and can intercept power frequency DC current again；Coupling transformer T1 has
Electrical isolation is acted on, while its primary coil and high frequency capacitance C1 composition high-pass filtering circuits, prevent power current to flow through.Protect
Shield device varistor RV1 and TVS pipe D1 are used for eliminating overvoltage and strong jamming on electric lines of force.
Capacitive coupling is easily affected by load on circuit.In photovoltaic generating system, inverter direct-flow side connects
Common mode magnet ring and Support Capacitor is connected to, wherein Support Capacitor has very strong decay to high-frequency carrier signal, causes carrier communication to be lost
Lose.
Content of the invention
The purpose of the present invention be exactly in order to overcome defect that above-mentioned prior art is present and to provide a kind of coupling effect good, no
The carrier communication termination power based on inductive affected by the electric lines of force fluctuation of load.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of carrier communication termination power based on inductive, leads in order to carry out carrier wave on the electric lines of force of photovoltaic generation
Letter, the termination power include that carrier signal transmitting terminal, transmitting terminal inductive coupler, receiving terminal inductive coupler and carrier signal connect
Receiving end, described carrier signal transmitting terminal are connected with the former limit of transmitting terminal inductive coupler, the secondary of transmitting terminal inductive coupler
It is connected with the former limit of receiving terminal inductive coupler by electric lines of force, the secondary of described receiving terminal inductive coupler and carrier signal
Receiving terminal connects.
The former limit parallel connection of described transmitting terminal inductive coupler is provided with the first TVS pipe.
The secondary parallel connection of described transmitting terminal inductive coupler is provided with the second TVS pipe.
The initial permeability of described transmitting terminal inductive coupler and receiving terminal inductive coupler is more than or equal to 3000, saturation
Magnetic density is more than or equal to 500mT.
The former secondary coil turn ratio of described transmitting terminal inductive coupler is 12：2, the original of receiving terminal inductive coupler is secondary
Side coil ratio is 12：2.
The magnetic core of described transmitting terminal inductive coupler and receiving terminal inductive coupler adopts P47 FERRITE CORE, and
For magnet ring structure, the volume of magnet ring is bigger, the less coupling effect of internal diameter is better, and sectional area is bigger, is more not susceptible to magnetic saturation
Compared with prior art, the present invention has advantages below：
The inductive coupling circuit that the present invention is realized using electromagnetic induction principle, it is to avoid conventionally employed capacitive coupling is received
Load effect, due to adopting inductive, using electromagnetic induction principle, the signal magnitude of coupling is determined by magnetic core and number of turns
Fixed, electric lines of force load effect is not received, poor so as to solve the problems, such as prior art signal coupling effect.Based on inductive
PLC technology is applied in photovoltaic inverting system, makes DC electric power line carrier communication not affected by a load, the communication efficiency to carrier wave
It is significantly improved.
Description of the drawings
Fig. 1 is traditional capacitance coupling circuit structure chart.
Fig. 2 is the inductive coupling circuit structure chart of the present invention.
Structural representations of the Fig. 3 for inductive test platform.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment：
This patent mainly solves the low success rate of situation of carrier communication in current photovoltaic inverting system, designs a kind of inductance coupling
The termination power of conjunction mode, inductive coupling circuit are as shown in Figure 2：
Inductive is transformer coupled, is to utilize electromagnetic induction principle, realize the signal of telecommunication primary and secondary side winding it
Between conversion.In Fig. 2, sending-end inductance bonder T1 is coupled to high-frequency carrier signal on electric lines of force, receiving terminal inductive
High-frequency carrier signal on electric lines of force is coupled to receiving terminal by device T2, so as to realize the communication between transmitting terminal and receiving terminal.
Inductive coupling circuit is mainly made up of magnetic core and coiling, and the efficiency of signal inductive mode depends primarily on following
Factor：
(1) material of magnetic core is coupled：In order to obtain higher coupling efficiency, the magnetic core of selection should have very high initial magnetic
Conductance μi, very high saturation flux density BS, very low core loss PCThe features such as.
(2) former secondary coil turn ratio：The turn ratio of coil can affect the impedance matching of the receiving terminal of signal, therefore select
Suitable turn ratio can obtain the signal power of maximum.
(3) structure of magnetic core is coupled：The structure of magnetic core has different shape, but from from the point of view of magnetic, magnet ring is optimum selection,
Because the magnetic circuit of magnet ring is the shape of a closing, therefore the performance of magnetic core is fully played.For magnet ring, its volume is got over
Greatly, the less coupling effect of internal diameter is better, and sectional area is bigger, is more not susceptible to magnetic saturation.
PLC technology based on inductive feasibility in photovoltaic inverting system is more than analyzed, in order to further test
Card impact of the inductive mode to carrier signal transmission, has built test platform as shown in Figure 3, tests inductive coupler
The impact to inductive coupling efficiency such as core material, core structure, coil ratio.
Inductive test platform as shown in figure 3, sending signal is coupled on DC electric power line by inductive coupler T1, DC
Electric lines of force is simulated by DC source DC and adjustable resistance R, is adjusted on DC electric power line by the size of change adjustable resistance R
Size of current, impact of the size of current to signal on observation DC electric power line.Carrier signal on DC electric power line passes through inductive
Device T2 is coupled to receiving terminal.
Experimental technique：Under the signal same case of carrier wave transmitting terminal (transmission amplitude Vpp=7.5V, Vrms=1.8V, frequently
Rate 187.5KHZ), the coupling effect under the different core materials of test, different coil ratios, different DC.Core material
From Mn_Zn FERRITE CORE (P47 (T40*25*20C)) and sendust core (KS1841125A), Mn_Zn is ferritic excellent
Point is that have compared with high initial magnetoconductivity μiVery low core loss PC, have the disadvantage saturation flux density BSRelatively low, sendust core
Advantage be have higher saturation flux density BSWith relatively low core loss PC, have the disadvantage relatively low initial permeability μi；Line
Circle turn ratio selects 12：1、12：2、30：1、30：2, the former limit number of turn is unsuitable very few, and the induction reactance of otherwise bonder is too small, impedance
Little impact sending signal；The resistance of adjustable resistance R is adjusted, it is 1A, 2A, 4A, 6A, 8A to make the electric current on DC electric power line, and observation is not
With impact of the DC current to signal coupling efficiency.
Experimental data：Inductive effect is tested under dissimilar magnetic core, different coil ratios, different DC
Rate, as shown in table 1, test data is the RMS value (V) for being coupled to electric lines of force carrier signal to test data.
1 inductive coupling efficiency test data of table
Interpretation of result：From in terms of test data, Mn_Zn FERRITE CORE has compared with high initial magnetoconductivity μi, therefore than ferrum silicon
Aluminum magnetic core coupling effect is more preferable；Saturation flux density B of Mn_Zn FERRITE CORESRelatively low, therefore under high current, magnetic core is easy
Saturation, as electric current increase coupling efficiency reduces.In actual applications, the selection to core material is most important, selects as far as possible
High initial magnetoconductivity μiWith high saturation magnetic flux density BSMagnetic core, be optimal the coupling efficiency of inductive coupler.
In due to inductive coupling circuit, power transmission is relevant with magnetic core energy storage, and the energy storage of magnetic core is by core material (Mn_Zn
Ferrite), core structure (structure with air gap), winding mode (Double-wire parallel wound), number of turns etc. determine that coupling efficiency is high
When, apart from farther, anti-Line Attenuation is bigger, makes whole communication efficiency more preferable for carrier signal transmission.
Claims (6)
1. a kind of carrier communication termination power based on inductive, leads in order to carry out carrier wave on the electric lines of force of photovoltaic generation
Letter, it is characterised in that the termination power includes carrier signal transmitting terminal (1), transmitting terminal inductive coupler (T1), receiving terminal inductance
Bonder (T2) and carrier signal receiving terminal (2), described carrier signal transmitting terminal (1) and transmitting terminal inductive coupler (T1)
Former limit connects, and the secondary of transmitting terminal inductive coupler (T1) is by electric lines of force (3) and the former limit of receiving terminal inductive coupler (T2)
Connection, the secondary of described receiving terminal inductive coupler (T2) are connected with carrier signal receiving terminal (2).
2. a kind of carrier communication termination power based on inductive according to claim 1, it is characterised in that described
The former limit parallel connection of transmitting terminal inductive coupler (T1) is provided with the first TVS pipe (D1).
3. a kind of carrier communication termination power based on inductive according to claim 1, it is characterised in that described
The secondary parallel connection of transmitting terminal inductive coupler (T1) is provided with the second TVS pipe (D2).
4. a kind of carrier communication termination power based on inductive according to claim 1, it is characterised in that described
The initial permeability of transmitting terminal inductive coupler (T1) and receiving terminal inductive coupler (T2) is more than or equal to 3000, saturation magnetic induction degree
It is more than or equal to 500mT.
5. a kind of carrier communication termination power based on inductive according to claim 1, it is characterised in that described
The former secondary coil turn ratio of transmitting terminal inductive coupler (T1) is 12：2, the former secondary coil of receiving terminal inductive coupler (T2)
Turn ratio is 12：2.
6. a kind of carrier communication termination power based on inductive according to claim 1, it is characterised in that described
The magnetic core of transmitting terminal inductive coupler (T1) and receiving terminal inductive coupler (T2) adopts P47 FERRITE CORE, and is magnet ring
Structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610994168.8A CN106506048A (en) | 2016-11-11 | 2016-11-11 | A kind of carrier communication termination power based on inductive |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610994168.8A CN106506048A (en) | 2016-11-11 | 2016-11-11 | A kind of carrier communication termination power based on inductive |
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| CN106506048A true CN106506048A (en) | 2017-03-15 |
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| CN201610994168.8A Pending CN106506048A (en) | 2016-11-11 | 2016-11-11 | A kind of carrier communication termination power based on inductive |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108988908A (en) * | 2018-07-25 | 2018-12-11 | 华北电力大学（保定） | A kind of medium-voltage distribution network carrier communication cassette inductive coupler setting method and system |
| CN113224798A (en) * | 2021-06-07 | 2021-08-06 | 丰郅(上海)新能源科技有限公司 | Photovoltaic module power optimization system and power optimization method |
| US20220286163A1 (en) * | 2019-11-28 | 2022-09-08 | Huawei Digital Power Technologies Co., Ltd. | Power line communication apparatus and power generating system |
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| EP0463341B1 (en) * | 1990-06-22 | 1995-12-13 | British Aerospace Public Limited Company | Digital data transmission with simultaneous transmission over a single line |
| US20030160684A1 (en) * | 1999-12-30 | 2003-08-28 | Ambient Corporation | Inductive coupling of a data signal for a power transmission cable |
| CN2742682Y (en) * | 2004-01-06 | 2005-11-23 | 中国电力科学研究院 | Electric inductive coupling device for power high speed data communication system |
| CN102111189A (en) * | 2011-04-11 | 2011-06-29 | 福建省电力有限公司宁德电业局 | Long-distance high-speed broadband power line communication method |
| CN102629882A (en) * | 2012-03-27 | 2012-08-08 | 上海市电力公司 | Power carrier communication system of cable shielding layer |
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2016
- 2016-11-11 CN CN201610994168.8A patent/CN106506048A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0463341B1 (en) * | 1990-06-22 | 1995-12-13 | British Aerospace Public Limited Company | Digital data transmission with simultaneous transmission over a single line |
| US20030160684A1 (en) * | 1999-12-30 | 2003-08-28 | Ambient Corporation | Inductive coupling of a data signal for a power transmission cable |
| CN2742682Y (en) * | 2004-01-06 | 2005-11-23 | 中国电力科学研究院 | Electric inductive coupling device for power high speed data communication system |
| CN102111189A (en) * | 2011-04-11 | 2011-06-29 | 福建省电力有限公司宁德电业局 | Long-distance high-speed broadband power line communication method |
| CN102629882A (en) * | 2012-03-27 | 2012-08-08 | 上海市电力公司 | Power carrier communication system of cable shielding layer |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108988908A (en) * | 2018-07-25 | 2018-12-11 | 华北电力大学（保定） | A kind of medium-voltage distribution network carrier communication cassette inductive coupler setting method and system |
| US20220286163A1 (en) * | 2019-11-28 | 2022-09-08 | Huawei Digital Power Technologies Co., Ltd. | Power line communication apparatus and power generating system |
| US11637589B2 (en) * | 2019-11-28 | 2023-04-25 | Huawei Digital Power Technologies Co., Ltd. | Power line communication apparatus and power generating system |
| CN113224798A (en) * | 2021-06-07 | 2021-08-06 | 丰郅(上海)新能源科技有限公司 | Photovoltaic module power optimization system and power optimization method |
| CN113224798B (en) * | 2021-06-07 | 2022-10-14 | 丰郅(上海)新能源科技有限公司 | Photovoltaic module power optimization system and power optimization method |
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Application publication date: 20170315 |
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