CN104467921B - A kind of high speed power line carrier communication system signal distribution equipment - Google Patents
A kind of high speed power line carrier communication system signal distribution equipment Download PDFInfo
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- CN104467921B CN104467921B CN201410591406.1A CN201410591406A CN104467921B CN 104467921 B CN104467921 B CN 104467921B CN 201410591406 A CN201410591406 A CN 201410591406A CN 104467921 B CN104467921 B CN 104467921B
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Abstract
The invention provides a kind of high speed power line carrier communication system signal distribution equipment, including carrier signal bonder, first carrier signal modem, the second carrier signal modulation demodulator, the first communication terminal and the second communication terminal, the first carrier signal modem is connected with the first communication terminal, the second carrier signal modulation demodulator is connected with the second communication terminal, also include signal distributor, the input of the signal distributor is connected with carrier signal bonder；The signal distributor includes the first outfan and the second outfan, and first outfan is connected with first carrier signal modem, and second outfan is connected with the second carrier signal modulation demodulator.The present invention has the advantages that low cost and strong antijamming capability.
Description
Technical field
The present invention proposes a kind of high speed power line carrier communication equipment, more particularly, to a kind of low cost and anti-interference energy
The strong high speed power line carrier communication system signal distribution equipment of power.
Background technology
Power line carrier communication (PowerLine Carrier-PLC) is using electric power transmission line as information transmitting medium
Carry out a kind of specific communication mode of voice or data transfer.According to the electricity that carrier signal transmission is carried out as information transmitting medium
Line voltages grade can be divided into：High-tension electricity line carrier communication (35kV and above), medium voltage electricity line carrier communication
(10kV electric pressures), low-voltage powerline carrier communication (380/220V low-voltage distribution wires)；Can be divided into according to signal modulation mode
OFDM, FSK, PSK, ASK etc., can be divided into arrowband, broadband transmission according to transfer rate.General carrier telecommunication is to carry
The information for needing to send is sent to carrier signal modulation demodulator, carrier signal in conventional digital signal mode by wave communication terminal
Modem is modulated to the signal according to default modulation system, is sent to carrier signal bonder, carrier signal coupling
Clutch is coupled to modulated carrier signal (general 100kHz to 40MHz) on electric lines of force and is transmitted, and signal connects
Receipts process is in contrast.So complete equipment must have two carrier signal bonders work, and cost is very high, is unfavorable for
Popularization and application, and poor anti jamming capability.
The content of the invention
In order to solve the above problems, the invention provides a kind of only need a carrier signal bonder just complete work,
And the signal distributor of low cost, strong antijamming capability.A kind of high speed power line carrier communication system signal that the present invention is provided
Distributor, the technical scheme of employing are as follows：
A kind of high speed power line carrier communication system signal distribution equipment, including carrier signal bonder, first carrier letter
Number modem, the second carrier signal modulation demodulator, the first communication terminal and the second communication terminal, first carrier signal are adjusted
Modulator-demodulator is connected with the first communication terminal, and the second carrier signal modulation demodulator is connected with the second communication terminal, is also wrapped
Include：Signal distributor, the input of signal distributor are connected with carrier signal bonder；Signal distributor includes the first output
End and the second outfan, the first outfan is connected with first carrier signal modem, the second outfan and the second carrier wave
Signal modem is connected.
Being further characterized by signal distributor also includes LC band filters, impedance matching autotransformer, distribution self coupling
Transformator, isolation resistance, the first load resistance and the second load resistance, LC band filters and distribution autotransformer respectively with
Impedance matching autotransformer is connected, and the first outfan and the second outfan are connected with distribution autotransformer respectively, every
It is connected between the first outfan, the second outfan from resistance, the first load resistance is connected with the first outfan, the second load
Resistance is connected with the second outfan.
Being further characterized by signal distributor also includes compensating electric capacity, compensating electric capacity and impedance matching autotransformer, divides
It is connected with the line between autotransformer.
It is further characterized by LC band filters to be in series and constituted by LC filter networks inductance and LC filter network electric capacity.
The resistance for being further characterized by the resistance and the second load resistance of the first load resistance is equal.
The resistance for being further characterized by isolation resistance is the twice of the first load resistance resistance.
The present invention compared with the existing technology, with advantages below and beneficial effect：
1st, the present invention has signal distributor, power line carrier communication signal will be assigned as will not occurring each other mutually all the way
Two road carrier signals of interference, ensure two power line carrier communication terminals by realizing by a carrier signal bonder
Proper communication, so as to reaching the installation number for reducing carrier signal bonder, reducing system cost and improving adjacent frequency signal
The effect for interfering.
2nd, the present invention have LC band filters, can stabilization signal, reduce interference, it is ensured that signal stabilization transmit.
3rd, the present invention has compensating electric capacity, line between compensation distribution autotransformer stream, impedance matching autotransformer
Inductance, it is ensured that frequency characteristic.
4th, the present invention has isolation resistance, and the resistance of isolation resistance is the first load resistance, the second load resistance resistance
Twice so that two outfan transmission signals are separate and unaffected, it is ensured that the stability of transmission.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is a kind of circuit theory diagrams of high speed power line carrier communication system signal distribution equipment of the invention；
Fig. 2 be a kind of high speed power line carrier communication system signal distribution equipment of the invention embodiment in the first communication eventually
The signal to noise ratio figure at end；
Fig. 3 be a kind of high speed power line carrier communication system signal distribution equipment of the invention embodiment in the second communication eventually
The signal to noise ratio figure at end.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
As shown in figure 1, a kind of high speed power line carrier communication system signal distribution equipment, including carrier signal bonder 1,
First carrier signal modem 2, the second carrier signal modulation demodulator 3, the first communication terminal 4 and the second communication terminal 5,
First carrier signal modem 2 is connected with the first communication terminal 4, and the second carrier signal modulation demodulator 3 and second is logical
Letter terminal 5 is connected, and also including signal distributor 6, the input of signal distributor 6 is connected with carrier signal bonder 1；Letter
Number allotter 6 includes the first outfan 61 and the second outfan 62, the first outfan 61 and first carrier signal modem 2
It is connected, the second outfan 62 is connected with the second carrier signal modulation demodulator 3.
The present invention optimal way be：Signal distributor 6 also includes LC band filters 63, impedance matching autotransformer
64th, autotransformer 65, isolation resistance 66, the first load resistance 67 and the second load resistance 68, LC band filters 63 are distributed
It is connected with impedance matching autotransformer 64 with distribution autotransformer 65 respectively, the first outfan 61 and the second outfan 62
It is connected with distribution autotransformer 65 respectively, isolation resistance 66 is connected between the first outfan 61, the second outfan 62, the
One load resistance 67 is connected with the first outfan 61, and the second load resistance 68 is connected with the second outfan 62.
Signal distributor 6 also includes compensating electric capacity 69, compensating electric capacity 69 and impedance matching autotransformer 64, distribution self coupling
Line between transformator 65 is connected.
LC band filters 63 are in series and are constituted by LC filter networks inductance 631 and LC filter networks electric capacity 632.
The resistance of the resistance of the first load resistance 67 and the second load resistance 68 is equal.
The resistance of isolation resistance 66 is the twice of 67 resistance of the first load resistance.
Embodiment
Specifically, carrier signal is electric by LC filter networks inductance 631, LC filter networks by one in input first
Hold 632 be in series composition 1-40MHz the signal that filters outside 1-40MHz of LC band filters 63, then by impedance matching from
Carrier signal transmission to autotransformer 65 is distributed, is divided into two-way and flows to the first outfan 61 and the second output by coupling transformator 64
End 62.
In the present embodiment, 63 design objective of LC band filters is as follows:
1) mid frequency:20MHz；
2) -2dB bandwidth:≥40MHz；
3) insertion loss:≤2dB；
4) stopband suppresses 1:During f0 ± 5MHz, suppression >=40dB；
5) stopband suppresses 2:During f=24MHz, suppression >=50dB；
6) operating temperature:- 55 DEG C～85 DEG C；
7) impedance:50Ω.
Impedance matching autotransformer 64 in the present embodiment be impedance conversion transformer, on annular high frequency magnetic core around
Into in the present embodiment, its input to ground is 1.414 to 1 with the turn ratio on tap to ground, and impedance ratio is 2 to 1, and center is taken out
Head load is 25 Ω, and sending-end impedance is 50 Ω.Distribution autotransformer 65 is distribution transformer in the present embodiment, and it is root
The head end of the end of one enamel-covered wire and another enamel-covered wire is connected as centre cap in annular high frequency magnetic according to transmission line principle
Make on core and around a few, the enamel-covered wire of impedance matching autotransformer 64 and distribution autotransformer 65 adopts the line footpath can be with root
According to formula：
D=1.13 (I/J) ^1/2
Calculate, I is size of current, and J is electric current density, the line footpath that different exploitations goes out is different.Due to high frequency
Electric current has Kelvin effect in the conductor, thus when it is determined that different frequency is calculated also during line Jing conductor penetration depth.
The centre tapped impedance of impedance matching autotransformer 64 and distribution autotransformer 65 is 50/2 Ω, i.e., 25
Ω.Should be remote according to the coil length of run of the principle of transmission line, impedance matching autotransformer 64 and distribution autotransformer 65
Less than wavelength, otherwise high frequency frequency response is undesirable.If length of run is short, the number of turns is necessarily reduced, and inductance value also necessarily reduces, lead
Low frequency frequency response is caused to degenerate, therefore it is required that the permeability of magnetic core is high, high-frequency loss is little, only in this way just can guarantee that allotter
Bandwidth, in the present embodiment, the parameter of selected impedance matching autotransformer 64 and distribution autotransformer 65 is as follows：
1) range of application：Coupling transformer
2) species：Inductance magnetic bead
3) coiling form：It is interior wound
4) inductance value：0.0046
First outfan 61 and the second outfan 62 it is mutually isolated by isolation resistance 66 realizing.If first
Send into signal on outfan 61, the allocated autotransformer of signal 65 flows to impedance matching autotransformer 64, while second is defeated
Go out and a reverse current is induced on end 62, but have the current direction of and 61 homophase of the first outfan by isolation resistance 66
Second outfan 62, the resistance of isolation resistance 66 is the first load resistance 67, the twice of 68 resistance of the second load resistance, the two
Size of current equal direction is conversely, and then cancel out each other.Compensating electric capacity 69 is used for compensation distribution autotransformer 65, impedance matching
The inductance of 64 lines of autotransformer, it is ensured that frequency characteristic.Signal is sent into from centre cap, being divided into two-way, to flow to first defeated
Go out end 61 and the second outfan 62, as circuit is symmetrical, so the two output signal powers are equal, phase place is also equal,
Two outfans connect 50 Europe the first load resistances 67 and 50 the second load resistances of Europe 68 respectively.The signal that input is sent into is distributed to
First outfan 61 and the second outfan 62, obtain the loss of a half-power, i.e. 3dB on each outfan, actually plus leading
The loss of line and magnetic core, total loss about 4dB.
The 6 each technical specification of signal distributor for finally giving is as follows：
(1) frequency range:1-40MHz；
(2) reflection loss:≤20dB；
(3) insertion loss:≤4.8dB；
(4) stopband suppresses 1:During f0 ± 5MHz, suppression >=40dB；
(5) stopband suppresses 2:During f=24MHz, suppression >=50dB；
(6) mutual isolation:≥30dB；
(7) impedance:50Ω.
Such as Fig. 2 and Fig. 3, it is with 4-34MHz operating frequencies, in the 10kV overhead transmission lines actual measurement present invention of 1.5 kilometers lengths
The first outfan 61 and the second outfan 62 high-speed power line carrier communication terminal signal to noise ratio figure.Wherein, abscissa is
Operating frequency, vertical coordinate are signal to noise ratio.
In addition, embodiment of above is the high-speed power line carrier communication design mainly for 1-40MHz, if adjustment
Change LC filter network inductance, LC filter network electric capacity, impedance matching autotransformer, distribution autotransformer, isolation resistance
Deng parameter, patent of the present invention is equally applicable to other power line carrier communications.
The present invention has signal distributor, will be assigned as mutual doing each other by power line carrier communication signal all the way
Two road carrier signals disturbed, ensure two power line carrier communication terminals by realizing by a carrier signal bonder
Proper communication, so as to reaching the installation number for reducing carrier signal bonder, reducing system cost and improve adjacent frequency signal
The effect for interfering.
The present invention have LC band filters, can stabilization signal, reduce interference, it is ensured that signal stabilization transmit.
The present invention has compensating electric capacity, the electricity of line between compensation distribution autotransformer stream, impedance matching autotransformer
Sense, it is ensured that frequency characteristic.
The present invention has isolation resistance, and the resistance of isolation resistance is the first load resistance, the second load resistance resistance
Twice so that two outfan transmission signals are separate and unaffected, it is ensured that the stability of transmission.
Presently preferred embodiments of the present invention is the foregoing is only, not to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (5)
1. a kind of high speed power line carrier communication system signal distribution equipment, including carrier signal bonder, first carrier signal
Modem, the second carrier signal modulation demodulator, the first communication terminal and the second communication terminal, the first carrier signal
Modem is connected with the first communication terminal, and the second carrier signal modulation demodulator is connected with the second communication terminal
Connect, it is characterised in that also including signal distributor, the input of the signal distributor is connected with carrier signal bonder；
The signal distributor includes the first outfan and the second outfan, first outfan and first carrier signal modulation
Demodulator is connected, and second outfan is connected with the second carrier signal modulation demodulator；
The signal distributor also includes：Filter the LC band filters of 1-40MHz external signals, impedance matching autotransformer,
Distribution autotransformer, isolation resistance, the first load resistance and the second load resistance, the LC band filters and distribution self coupling
Transformator is connected with impedance matching autotransformer respectively, first outfan and the second outfan respectively with distribution self coupling
Transformator is connected, and the isolation resistance is connected between the first outfan and the second outfan, first load resistance with
First outfan is connected, and second load resistance is connected with the second outfan.
2. a kind of high speed power line carrier communication system signal distribution equipment according to claim 1, it is characterised in that institute
Stating signal distributor also includes compensating electric capacity, the compensating electric capacity and impedance matching autotransformer, distribution autotransformer it
Between line be connected.
3. a kind of high speed power line carrier communication system signal distribution equipment according to claim 1, it is characterised in that institute
State LC band filters to be in series and constituted by LC filter networks inductance and LC filter network electric capacity.
4. a kind of high speed power line carrier communication system signal distribution equipment according to claim 1, it is characterised in that institute
The resistance for stating the resistance and the second load resistance of the first load resistance is equal.
5. a kind of high speed power line carrier communication system signal distribution equipment according to claim 4, it is characterised in that institute
The resistance for stating isolation resistance is the twice of the first load resistance resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410591406.1A CN104467921B (en) | 2014-10-29 | 2014-10-29 | A kind of high speed power line carrier communication system signal distribution equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410591406.1A CN104467921B (en) | 2014-10-29 | 2014-10-29 | A kind of high speed power line carrier communication system signal distribution equipment |
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| Publication Number | Publication Date |
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| CN104467921A CN104467921A (en) | 2015-03-25 |
| CN104467921B true CN104467921B (en) | 2017-04-05 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105116866A (en) * | 2015-09-28 | 2015-12-02 | 成都贝发信息技术有限公司 | PLC (Programmable Logic Controller)-based production workshop equipment operation monitoring device |
| CN105530030A (en) * | 2016-02-17 | 2016-04-27 | 云南电网有限责任公司电力科学研究院 | Communication system and communication method based on high-speed power line carrier communication |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003018558A (en) * | 2001-06-28 | 2003-01-17 | Matsushita Electric Ind Co Ltd | Television signal distribution system |
| CN1937436A (en) * | 2005-09-22 | 2007-03-28 | 阿尔卑斯电气株式会社 | Stacking mode for electric-power wire communication signal |
| CN101414852A (en) * | 2007-10-19 | 2009-04-22 | 弥亚微电子（上海）有限公司 | Output coupling and filter circuit for power line carrier communication |
| CN103733530A (en) * | 2011-08-11 | 2014-04-16 | 松下电器产业株式会社 | Splitter |
| CN204231343U (en) * | 2014-10-29 | 2015-03-25 | 云南电网公司电力科学研究院 | A kind of high speed power line carrier communication system signal distributor |
-
2014
- 2014-10-29 CN CN201410591406.1A patent/CN104467921B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003018558A (en) * | 2001-06-28 | 2003-01-17 | Matsushita Electric Ind Co Ltd | Television signal distribution system |
| CN1937436A (en) * | 2005-09-22 | 2007-03-28 | 阿尔卑斯电气株式会社 | Stacking mode for electric-power wire communication signal |
| CN101414852A (en) * | 2007-10-19 | 2009-04-22 | 弥亚微电子（上海）有限公司 | Output coupling and filter circuit for power line carrier communication |
| CN103733530A (en) * | 2011-08-11 | 2014-04-16 | 松下电器产业株式会社 | Splitter |
| CN204231343U (en) * | 2014-10-29 | 2015-03-25 | 云南电网公司电力科学研究院 | A kind of high speed power line carrier communication system signal distributor |
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Address after: Yunda economic and Technological Development Zone in Yunnan province Kunming city 650217 West Road No. 105 Co-patentee after: YUNNAN HUAREN ELECTRICAL EQUIPMENT TECHNOLOGY Co.,Ltd. Patentee after: ELECTRIC POWER RESEARCH INSTITUTE, YUNNAN POWER GRID Co.,Ltd. Address before: Yunda economic and Technological Development Zone in Yunnan province Kunming city 650217 West Road No. 105 Co-patentee before: YUNNAN HUAREN ELECTRICAL EQUIPMENT TECHNOLOGY Co.,Ltd. Patentee before: ELECTRIC POWER RESEARCH INSTITUTE, YUNNAN POWER GRID Corp. |
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Effective date of registration: 20191203 Address after: Yunda economic and Technological Development Zone in Yunnan province Kunming city 650217 West Road No. 105 Patentee after: ELECTRIC POWER RESEARCH INSTITUTE, YUNNAN POWER GRID Co.,Ltd. Address before: Yunda economic and Technological Development Zone in Yunnan province Kunming city 650217 West Road No. 105 Co-patentee before: YUNNAN HUAREN ELECTRICAL EQUIPMENT TECHNOLOGY Co.,Ltd. Patentee before: ELECTRIC POWER RESEARCH INSTITUTE, YUNNAN POWER GRID Co.,Ltd. |
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