CN105634557B - Stub cable mixes mesolow power line carrier, PLC implementation method with aerial - Google Patents
Stub cable mixes mesolow power line carrier, PLC implementation method with aerial Download PDFInfo
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- CN105634557B CN105634557B CN201510991827.8A CN201510991827A CN105634557B CN 105634557 B CN105634557 B CN 105634557B CN 201510991827 A CN201510991827 A CN 201510991827A CN 105634557 B CN105634557 B CN 105634557B
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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
- H04B3/542—Systems for transmission via power distribution lines the information being in digital form
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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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
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- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
The present invention relates to stub cables to mix mesolow power line carrier, PLC implementation method with aerial, integrated capacitor coupler is installed on the aerial condutor of substation exit stub cable Yu aerial mixed line junction, it is connected to first data transmission machine by a high frequency cable, first data transmission machine is connected to back-stage management machine by data line；Clamping-type inductive coupler is installed on the transmission line of electricity other side substation exit cable sheath, the second data-set is connected to by another high frequency cable, signal by cable shield and the aerial condutor phase line formed and constitutes communication loop between the earth；Start the first and second data transmission electromechanical source and is communicated by back-stage management machine configuration status data.Stub cable proposed by the invention mixes mesolow power line carrier, PLC implementation method with aerial, significantly improves signal transmission quality, realizes power distribution network Short cables and the aerial efficient communication for mixing mid & low-voltage line, lays the foundation for power grid security economical operation.
Description
Technical field
The present invention relates to power distribution network power-line carrier communication field, especially a kind of stub cable is low with aerial mix
Piezoelectricity powerline carrier communication implementation method.
Background technology
In recent years, domestic and international Utilities Electric Co., related scientific research mechanism and manufacturer all press in actively developing using existing 10kV
Power line realizes high-speed data communication as transmission channel, to be intelligent grid service.The maximum advantage of power carrier is exactly
Can be using immanent power line network as a kind of telecommunication media, this is that distribution is most wide, most ready-made in the world
The communication resource.Application of the carrier on distribution network communication in power automatic system has the history of decades, in areas such as America and Europes
Using effect is relatively good.Such as the DCS3000 middle voltage distribution networks carrier systems of Siemens, as in, the carrier wave of low speed it is logical
Letter system is applied to middle voltage distribution networks automated system.Nearly ten years, the various countries such as Germany, Switzerland, Spain, the U.S., Britain are ground
The correlation theory for studying carefully mechanism centering low-voltage distribution network power line high speed carrier communication has made intensive studies, and has basically formed power distribution network
The theoretical system of power line communication.Currently, from the point of view of practical application effect, including external and domestic middle voltage distribution networks carrier communication
It is also difficult to fully meet requirement of China's distribution automation system to reliability and real-time, is mainly used for automatic data logging（It is special
It is not meter reading and the spatial load forecasting of low-voltage customer）The not high occasion of equal requirement of real-time.In simple terms, maximum obstacle
One of be its communication reliability, this is that all mesolow carrier on distribution network communicate the pressing issues that must be solved, special
It is not the basis that reasonable design coupling scheme and data transmission device are to ensure that data transmission correctness.
Invention content
The purpose of the present invention is to provide stub cables to mix mesolow power line carrier, PLC implementation method with aerial, by
Power distribution station exports stub cable and installs integrated capacitor coupler on the aerial condutor of aerial mixed line junction, high by one
Defect exists in the prior art to overcome to the method for proper data conveyer in frequency cable connection.
To achieve the above object, the technical scheme is that：Stub cable mixes mesolow power line carrier, PLC with aerial
Implementation method provides a stub cable and aerial mixed line, realizes in accordance with the following steps：
Step S1：The stub cable described in the substation exit of the circuit side is led with the aerial of aerial mixed line junction
Integrated capacitor coupler is installed, the integrated capacitor coupler is connected to first data transmission by a high frequency cable on line
Machine, the first data transmission machine are connected to back-stage management machine by a data line；In circuit other side substation exit
Clamping-type inductive coupler is installed, the clamping-type inductive coupler is connected to by another high frequency cable on the cable sheath at place
Second data-set, the phase line being made of cable shield and aerial condutor and constitutes communication loop between the earth；
Step S2：The first data transmission machine and second data-set are connected to an electricity by data line
Power automatic control device；
Step S3：The first data transmission machine, second data-set and the back-stage management machine pass through AC electricity
Source line is connected to alternating current 220V power supply；
Step S4：Start the electricity of the first data transmission machine, second data-set and the back-stage management machine
The communication shape of the first data transmission machine and second data-set is arranged by the back-stage management machine for source device
State data.
Step S5：Receive or send the signal of communication from the power auto-control device.
In an embodiment of the present invention, the stub cable and aerial mixed line are 10kV and 10kV or less voltage class
Mesolow distribution line, the circuit two ends are power cable, and wherein one end length is the stub cable circuit less than 100m, in
Between be overhead transmission line.
In an embodiment of the present invention, the stub cable is installed integrally on the aerial condutor of aerial mixed line junction
Change capacity coupler, clamping-type inductive coupler is installed on other end cable sheath.
In an embodiment of the present invention, the stub cable shielded layer two-terminal-grounding, cannot among the stub cable shielded layer
It is directly grounded；If have end among the stub cable shielded layer, it is grounded by inductance, to prevent signal of communication by cable
Intermediate earth point directly enters ground.
In an embodiment of the present invention, the stub cable and the aerial condutor of aerial mixed line junction are by A, B, C tri-
Phase composition, the integrated capacitor coupler are installed on any one phase in A, B, C three-phase.
In an embodiment of the present invention, the first data transmission machine and second data-set are a pair of of signal
Receiver/transmitter, the first data transmission machine and the back-stage management machine and second data-set installation ground
Point can exchange installation.
In an embodiment of the present invention, the first data transmission machine and second data-set are that carrier wave is logical
Believe equipment, and includes data-interface, management interface, low order group's data multiplexing controller, Data Transmission Control Unit, modulation /demodulation
Device, analog/digital converter, adaptive equalizing filter, integrated amplifier and reception send RS232 or RS485
Data signal interfaces；The back-stage management machine is a power PC processor.
In an embodiment of the present invention, the coaxial cable that the high frequency cable impedance is 75 ohm.
In an embodiment of the present invention, the first data transmission machine and second data-set send or receive
Mid & low-voltage line super band is 20 ~ 500kHz carrier signals.
In an embodiment of the present invention, the power auto-control device is distant place harvester RTU.
Compared to the prior art, the invention has the advantages that：Stub cable proposed by the invention is mixed with aerial
Mesolow power line carrier, PLC implementation method, by installing one on the aerial condutor of stub cable Yu aerial mixed line junction
Body capacity coupler and appropriate data transfer machine is connected to by a high frequency cable, overcome plug-in in conventional method
Inductive coupler is directly connected on stub cable crust and signal cannot be effectively coupled to distribution line, and receiving terminal is caused to be surveyed
Trial signal cannot be detected normally and cannot reasonably control the deficiency of data signal transmission, and the method is low in effectively improving
It is press-fitted the transmission quality of electric line signal of communication, meets the transmission requirement of power distribution network automatic control signal, it is ensured that operation of power networks
Reliability and safety.
Description of the drawings
Fig. 1 is mesolow power-line carrier communication system connection diagram in one embodiment of the invention.
Fig. 2 is mid & low-voltage line composition schematic diagram in one embodiment of the invention.
Fig. 3 is data-set hardware structure diagram in one embodiment of the invention.
Fig. 4 is not improve mesolow power-line carrier communication system connection diagram in one embodiment of the invention.
Fig. 5 is to be connected by inventive method in one embodiment of the invention and do not improved connection type fading channel test result ratio
Compared with figure.
Fig. 6 is integrated capacitor coupler and clamping-type inductive coupler connection diagram in one embodiment of the invention.
【Label declaration】：1- integrated capacitor couplers；21-75 ohm of high frequency cables；22-75 ohm of high frequency cables；3-
First data transmission machine；4- back-stage management machines；5- clamping-type inductive couplers；The second data-sets of 6-；7-RS232 data connect
Wiring.
Specific implementation mode
Below in conjunction with the accompanying drawings and on-the-spot test, technical scheme of the present invention is specifically described.
The present invention provides stub cable and mixes mesolow power line carrier, PLC implementation method with aerial, which is characterized in that such as Fig. 1
It is shown, in accordance with the following steps：
S1：It is exported in substation 1 and integrated capacitor is installed on aerial condutor of the stub cable with aerial mixed line junction
Coupler 1 is connected to first data transmission machine 3 by a high frequency cable 21, and first data transmission machine 3 passes through a data wire 7
It is connected to back-stage management machine 4；Clamping-type inductive coupler is installed on the transmission line of electricity other side substation 2 outlet cable sheath
5, the second data-set 6 is connected to by another high frequency cable 21, the phase line being made of cable shield and aerial condutor with
Communication loop is constituted between the earth；
S2：First data transmission machine 3, the second data-set 6 are connected to power auto-control device by data line；
S3：First data transmission machine 3, the second data-set 6 and back-stage management machine 4 are connected to exchange by ac power cable
220V power supplys；
S4：The supply unit for starting first data transmission machine 3, the second data-set 6 and back-stage management machine 4, by rear
The communications state data of first data transmission machine 3, the second data-set 6 is arranged in platform supervisor 4.
S5：Receive or send the signal of communication from power auto-control device.
Further, in the present embodiment, stub cable and the distribution line that aerial mixed line is 10kV, concrete composition is such as
Shown in Fig. 2, which is power cable, and it is 12m (being less than 100m stub cables circuit) that substation 1, which exports cable length,
Centre is overhead transmission line, and length 4km, 2 outlet section cable length of another substation is 500m.
Further, in the present embodiment, stub cable is integrated electricity with the equipment that aerial mixed line junction is installed
Hold coupler 1, the equipment installed on other end cable sheath is clamping-type inductive coupler 5, as shown in Figure 6.
Further, in the present embodiment, as shown in fig. 6, stub cable shielded layer two-terminal-grounding, centre cannot directly connect
Ground, centre are grounded when having end by inductance, prevent test signal from directly entering ground by the earth point among cable.
Further, in the present embodiment, stub cable and the aerial condutor of aerial mixed line junction are by A, B, C three-phase
Composition, integrated capacitor coupler 1 are installed on any one phase in A, B, C three-phase.
Further, in the present embodiment, first data transmission machine 3, the second data-set 6 are that a pair of of data-signal connects
Receipts machine/transmitter, first data transmission machine 3 and back-stage management machine 4 can be interchanged with 6 infield of the second data-set.
Further, in the present embodiment, as shown in figure 3, first data transmission machine 3, the second data-set 6 are carrier wave
Telecommunication transmission equipment, by data-interface, management interface, low order group's data multiplexing controller, Data Transmission Control Unit, modulation /demodulation
Device, analog/digital converter, adaptive equalizing filter, integrated amplifier composition, and with reception or send RS232
Or the interface of RS485 data-signals.
Further, in the present embodiment, back-stage management machine 4 is a power PC processor.
Further, in the present embodiment, the coaxial cable that high frequency cable 21 and 22 impedances are 75 ohm.
Further, in the present embodiment, first data transmission machine 3, the second data-set 6 send or receive mesolow
Circuit super band is 20 ~ 500kHz carrier signals.
Further, in the present embodiment, power auto-control device is distant place harvester RTU.
In order to allow those skilled in the art to further appreciate that the technique effect of the present invention, in the present embodiment, according to Fig. 4's
Connection type is attached to not improving mesolow power-line carrier communication system, is installed at substation exit stub cable crust
Clamping-type inductive coupler is tested according to Fig. 1 connection type same procedures, and two kinds of connection type test results, which compare, sees
Fig. 5, solid line is according to Fig. 4 connection types in figure（It does not improve）Test value, dotted line is according to Fig. 1 connection type test values, namely adopts
With connection type provided by the present invention, do not change from figure 5 it can be seen that comparing tradition according to the pad value of connection type of the present invention
Into the superior 10 ~ 20dB of connection type, normally receiving for signal is ensured that.
In order to further verify the effect of the present invention, data-signal reception condition is surveyed according to Fig. 1 connection types
Examination.Concrete outcome is shown in Tables 1 and 2.Wherein, table 1 uses the present invention for the packet loss test record after the connection type provided,
Table 2 is not improve the packet loss test record after connection type using tradition.As it can be seen from table 1 message accuracy is 100%,
And connection type is not improved using tradition, message accuracy is only 80% or so.
1 connection type packet loss test record of the present invention of table
2 tradition of table does not improve connection type packet loss test record
The above are preferred embodiments of the present invention, all any changes made according to the technical solution of the present invention, and generated function is made
When with range without departing from technical solution of the present invention, all belong to the scope of protection of the present invention.
Claims (8)
1. stub cable mixes mesolow power line carrier, PLC implementation method with aerial, which is characterized in that provide a stub cable and frame
Empty joint line, is realized in accordance with the following steps：
Step S1：On the stub cable described in the substation exit of the circuit side and the aerial condutor of aerial mixed line junction
Integrated capacitor coupler is installed, the integrated capacitor coupler is connected to first data transmission machine by a high frequency cable,
The first data transmission machine is connected to back-stage management machine by a data line；At the substation exit of the circuit other side
Clamping-type inductive coupler is installed, the clamping-type inductive coupler is connected to second by another high frequency cable on cable sheath
Data-set, the phase line being made of cable shield and aerial condutor and constitutes communication loop between the earth；
Step S2：The first data transmission machine and second data-set are connected to an electric power certainly by data line
Dynamic control device；
Step S3：The first data transmission machine, second data-set and the back-stage management machine pass through ac power cable
It is connected to alternating current 220V power supply；
Step S4：Start the power supply dress of the first data transmission machine, second data-set and the back-stage management machine
It sets, the communications status number of the first data transmission machine and second data-set is set by the back-stage management machine
According to；
Step S5：Receive or send the signal of communication from the power auto-control device；
The stub cable and the mesolow distribution line that aerial mixed line is 10kV and 10kV or less voltage class, the circuit two
End is power cable, and wherein one end length is the stub cable circuit less than 100m, and centre is overhead transmission line；
The stub cable and installation integrated capacitor coupler on the aerial condutor of aerial mixed line junction, in other end electricity
Clamping-type inductive coupler is installed on cable crust.
2. stub cable according to claim 1 mixes mesolow power line carrier, PLC implementation method with aerial, feature exists
In：The shielded layer two-terminal-grounding of the stub cable cannot be directly grounded among the shielded layer of the stub cable；If the stub cable
Shielded layer among when having end, then be grounded by inductance, to prevent signal of communication from directly being entered by the earth point among cable
Ground.
3. stub cable according to claim 1 mixes mesolow power line carrier, PLC implementation method with aerial, feature exists
In：The stub cable and the aerial condutor of aerial mixed line junction are by tri- phase composition of A, B, C, the integrated capacitor coupling
Device is installed on any one phase in A, B, C three-phase.
4. stub cable according to claim 1 mixes mesolow power line carrier, PLC implementation method with aerial, feature exists
In：The first data transmission machine and second data-set are a pair of of signal receiver/transmitter, first number
According to conveyer and the back-stage management machine installation can be exchanged with second data-set infield.
5. stub cable according to claim 4 mixes mesolow power line carrier, PLC implementation method with aerial, feature exists
In：The first data transmission machine and second data-set are carrier communication equipment, and include data-interface, pipe
Manage interface, low order group's data multiplexing controller, Data Transmission Control Unit, modem, analog/digital converter, adaptive
Equalization filter, integrated amplifier and reception send RS232 or RS485 data signal interfaces；The back-stage management
Machine is a power PC processor.
6. stub cable according to claim 1 mixes mesolow power line carrier, PLC implementation method with aerial, feature exists
In：The coaxial cable that the high frequency cable impedance is 75 ohm.
7. stub cable according to claim 4 mixes mesolow power line carrier, PLC implementation method with aerial, feature exists
In：The first data transmission machine and second data-set send or receive mid & low-voltage line super band be 20 ~
500kHz carrier signals.
8. stub cable according to claim 1 mixes mesolow power line carrier, PLC implementation method with aerial, feature exists
In：The power auto-control device is distant place harvester RTU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510991827.8A CN105634557B (en) | 2015-12-25 | 2015-12-25 | Stub cable mixes mesolow power line carrier, PLC implementation method with aerial |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510991827.8A CN105634557B (en) | 2015-12-25 | 2015-12-25 | Stub cable mixes mesolow power line carrier, PLC implementation method with aerial |
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| CN105634557A CN105634557A (en) | 2016-06-01 |
| CN105634557B true CN105634557B (en) | 2018-11-06 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201113555Y (en) * | 2007-09-21 | 2008-09-10 | 上海思南电力通信有限公司 | Mixing line carrier network communication carrier signal coupling device |
| CN103558219A (en) * | 2013-11-19 | 2014-02-05 | 国家电网公司 | Power cable service life monitoring realization method based on shielding layer wave carrier communication |
| CN203747818U (en) * | 2013-12-02 | 2014-07-30 | 国家电网公司 | Medium-voltage power line carrier communication connection structure based on mixed lines |
| CN203968116U (en) * | 2014-07-01 | 2014-11-26 | 国家电网公司 | Joint line carrier communication apparatus |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107315129A (en) * | 2010-03-05 | 2017-11-03 | 瑞典爱立信有限公司 | Assess the noise and excessively stream on power line |
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2015
- 2015-12-25 CN CN201510991827.8A patent/CN105634557B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201113555Y (en) * | 2007-09-21 | 2008-09-10 | 上海思南电力通信有限公司 | Mixing line carrier network communication carrier signal coupling device |
| CN103558219A (en) * | 2013-11-19 | 2014-02-05 | 国家电网公司 | Power cable service life monitoring realization method based on shielding layer wave carrier communication |
| CN203747818U (en) * | 2013-12-02 | 2014-07-30 | 国家电网公司 | Medium-voltage power line carrier communication connection structure based on mixed lines |
| CN203968116U (en) * | 2014-07-01 | 2014-11-26 | 国家电网公司 | Joint line carrier communication apparatus |
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