CN102638291A - Power carrier communication system of overhead line - Google Patents
Power carrier communication system of overhead line Download PDFInfo
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- CN102638291A CN102638291A CN2012100830588A CN201210083058A CN102638291A CN 102638291 A CN102638291 A CN 102638291A CN 2012100830588 A CN2012100830588 A CN 2012100830588A CN 201210083058 A CN201210083058 A CN 201210083058A CN 102638291 A CN102638291 A CN 102638291A
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- overhead transmission
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- 239000000969 carrier Substances 0.000 title claims abstract description 81
- 238000004891 communication Methods 0.000 title claims abstract description 45
- 230000005540 biological transmission Effects 0.000 claims abstract description 63
- 230000001808 coupling Effects 0.000 claims abstract description 47
- 238000010168 coupling process Methods 0.000 claims abstract description 47
- 238000005859 coupling reaction Methods 0.000 claims abstract description 47
- 238000004804 winding Methods 0.000 claims abstract description 47
- 239000003990 capacitor Substances 0.000 claims abstract description 44
- 238000002955 isolation Methods 0.000 claims description 8
- 230000000051 modifying Effects 0.000 claims description 8
- 230000000875 corresponding Effects 0.000 claims description 4
- 230000001939 inductive effect Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000011664 signaling Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 235000019800 disodium phosphate Nutrition 0.000 description 1
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Abstract
The invention discloses a power carrier communication system of an overhead line, which is arranged among a plurality of buses in medium-voltage power distribution network line, wherein a three-phase overhead line is in circuit connection among the buses. The power carrier communication system of the overhead line comprises a plurality of integrated coupling capacitors, a plurality of power line carriers and a plurality of data terminals, wherein the integrated coupling capacitors correspond to the buses one by one and are in circuit connection with a one-phase overhead line, each integrated coupling capacitor comprises a primary side winding and a secondary side winding, two ends of the primary side winding are in circuit connection with the overhead line and is grounded, the power line carriers are in circuit connection with the secondary side windings of the integrated coupling capacitors, the data terminals are connected with the power line carriers in one-to-one correspondence, and the overhead line, the integrated coupling capacitor and the ground connected externally through the integrated coupling capacitors form a carrier signal remote transmission channel. Remote information transmission of medium-voltage carrier signals is realized by the overhead line, channel state is fine, attenuation is low and impedance change is low.
Description
Technical field
The present invention relates to a kind of carrier communication that is used for electric power system, be specifically related to a kind of overhead transmission line power carrier communication system.
Background technology
The medium voltage electricity line carrier communication utilizes the 10KV transmission line as the carrier communication media, does not produce material and construction cost input on the passage, is a kind of communication mode most characteristic in the electric power system; And the power distribution network line construction is firm; Carrier terminal equipment is gone through multinomial technological innovation for adapting to the circuit environment at modulation, encoding and decoding, technical elements such as anti-interference, makes power line carrier communication just really become a kind of promptly economic convenient, safe and reliable power distribution automation communication mode again.In electric power system, the power line carrier communication passage mainly is used for transmitting remote action data, cooperates in the power distribution station terminal equipment to realize functions such as remote measurement, remote signalling, remote control.
The power line carrier communication machine is exactly the data communication modulator-demodulator in essence, but he need overcome more complicated channel environment, and common modulation signal can't carry out normal transmission.10kV medium voltage distribution network circuit is because tunnel condition is poor, and decay is big, and impedance variations is big, and reason such as bursty interference is strong, makes carrier communication be difficult to open or unstable, is the blank spot of carrier communication in the past always.
The factor that influences circuit background noise and attenuation characteristic mainly contains following several:
Because the power distribution network operational mode is flexible, there is randomness in the customer charge switching, causes the instability of line impedance;
It is very strong that line load changes randomness;
Power distribution network bifurcated, " T " contact are many, and signal attenuation behind the circuit that injects same bus is serious;
The interference that is caused by electric power system, subscriber equipment all gets into distribution carrier communication net;
Adverse circumstances such as the high low temperature of thunderstorm cause that complete machine and communication line parameter change;
Overcome the ad hoc mode of carrier communication in the past, adopt networked bus structures, realized the transfer of data of one-to-many.
In recent years, along with the progress of ZAP, add the advanced DSP and the application of fpga chip, make ZAP obtain breakthrough in the application in this field, Related product uses at the scene, and is respond well.
Summary of the invention
The invention provides a kind of overhead transmission line power carrier communication system, do not produce the cost input of setting up communication port, antidamping, anti-interference guarantees that the communication in the electric power system connects.
For realizing above-mentioned purpose, the invention provides a kind of overhead transmission line power carrier communication system, this system is arranged between the some buses in the medium voltage distribution network circuit, and circuit is connected with the three-phase overhead transmission line between this bus; Be characterized in that this system comprises:
Several integrated coupling capacitors, itself and the corresponding one by one setting of bus, several integrated coupling capacitors all connect with the same circuit of overhead transmission line mutually; Each integrated coupling capacitor comprises the first side winding that circuit connects overhead transmission line, and with the secondary side winding of first side winding coupling, the two ends of its first side winding circuit respectively connect overhead transmission line and ground connection;
Several power line carriers, it is connected with the secondary side winding circuit of integrated coupling capacitor with the corresponding one by one setting of integrated coupling capacitor, power line carrier;
Several data terminal equipments, itself and power line carrier connect one to one;
Above-mentioned overhead transmission line, several integrated coupling capacitors, and, form carrier signal long-distance transmissions passage through the external the earth of each integrated coupling capacitor.
Each above-mentioned integrated coupling capacitor also comprises the isolation capacitance that is connected in series between overhead transmission line and the first side winding.
Adopt serial port to be connected between above-mentioned power line carrier and the data terminal equipment; Serial port adopts RS232 serial ports or RS485 serial ports.
Adopt Ethernet to be connected between above-mentioned power line carrier and the data terminal equipment.
Adopt the telecommunication cable of twin-core band screen to be connected between above-mentioned power line carrier and the secondary side winding of inductive coupler, transmission through coding, the carrier signal of modulation treatment.
Above-mentioned bus and overhead transmission line are arranged in the 10KV medium voltage distribution network circuit.
The data terminal equipment at the bus place of output signal transfers to power line carrier with signal; Power line carrier with signal encode, modulation etc. handles the back and produces carrier signal; Transfer to the secondary side winding of integrated coupling capacitor; Secondary side winding couples a signal to first side winding; First side winding transfers to overhead transmission line through isolation capacitance with signal, through overhead transmission line signal is transferred to the first side winding of the integrated coupling capacitor of another road bus, and this first side winding couples a signal to its secondary side winding; Secondary side winding transfers to power line carrier with signal again, and power line carrier will transfer to data terminal equipment after will receiving the signal processing reduction.
Overhead transmission line power carrier communication system of the present invention is compared with the communication technology in the prior art network system; Its advantage is; The present invention adopt overhead transmission line and the earth form carrier signal long-distance transmissions passage carry out in ballast ripple signal carry out remote message transmission; Not producing material and construction cost input on the passage, is a kind of communication mode most characteristic in the electric power system; And the power distribution network line construction is firm; Carrier terminal equipment is gone through multinomial technological innovation for adapting to the circuit environment at modulation, encoding and decoding, technical elements such as anti-interference; Its tunnel condition is good, decay is little, impedance variations is little, and power line carrier communication is a kind of promptly economic convenient, safe and reliable power distribution automation communication mode again; In electric power system, the power line carrier communication passage mainly is used for transmitting remote action data, cooperates in the power distribution station terminal equipment to realize functions such as remote measurement, remote signalling, remote control.
Description of drawings
Fig. 1 is the structural representation of overhead transmission line power carrier communication system of the present invention;
Fig. 2 is the signal transmission sketch map of overhead transmission line power carrier communication system of the present invention.
Embodiment
Below in conjunction with accompanying drawing, further specify embodiments of the invention.
The invention discloses a kind of overhead transmission line power carrier communication system, ballast wave communication during this system adopts, middle ballast wave communication refer in particular to be used on the 10KV distribution line, mainly serves the power-line carrier communication system of distribution automation system.
Shown in Fig. 1, a kind of embodiment of overhead transmission line power carrier communication system, this system is arranged between the two-way bus 1 in the 10KV medium voltage distribution network circuit, and this bus 1 includes " A " phase, " B " phase, " C " phase, three-phase line.Circuit is connected with three-phase overhead transmission line 2 between this two-way bus, this three-phase overhead transmission line 2 respectively with " A " of two-way bus 1 mutually, " B " phase, " C " circuitry phase connect.And the two ends of same phase overhead transmission line 2 circuit respectively connect on the homophase circuit of two-way bus 1, and promptly " A " of two-way bus 1 connects through one road overhead transmission line 2 mutually; " B " connects through one road overhead transmission line 2 mutually; " C " connects through an overhead transmission line 2 mutually.
Native system includes integrated coupling capacitor 3, on every road bus 1 place all one by one correspondence be provided with an integrated coupling capacitor 3.In the present embodiment, the integrated coupling capacitor 3 at two-way bus 1 place all circuit is connected on the overhead transmission line 2 of " C " phase.
Power cable 3 in the present embodiment can also adopt the AC220V in the resident family to use electric line.
Each integrated coupling capacitor 3 comprises an isolation capacitance, and a coupler that is connected in series with this isolation capacitance.
Coupler includes first side winding, and with the secondary side winding of this first side winding coupling.In the first side winding, the one of which end is connected with the isolation capacitance circuit; Other end ground connection, this first side winding ground connection one end connects the following pile crown of integrated coupling capacitor 3, and links to each other with the earth.
The other end of isolation capacitance connects the last pile crown of integrated coupling capacitor 3, and it is connected with overhead transmission line 2 circuit.
The variable effect that carrier signal transmission in the overhead transmission line receives the circuit power load is bigger; Need consider certain signal attenuation amount of redundancy when designing carrier-current relaying point on the long circuit; And carrier signal can not need respectively be installed a coupling capacitor and carry out signal bridging directly through block switch (when block switch is in the branch position) at the block switch two ends.
Overhead transmission line power carrier communication system of the present invention also includes power line carrier 4 and data terminal equipment 5.Each integrated coupling capacitor 3 all one by one correspondence be provided with power line carrier 4 and data terminal equipment 5.
The secondary side winding of coupler all is connected with its pairing power line carrier 4 circuit in each integrated coupling capacitor 3.The two ends of secondary side winding adopt the telecommunication cable of twin-core band screen to connect power line carrier 4 in the integrated coupling capacitor 3, the carrier signal of transmission process coding, modulation treatment between the secondary side winding of coupler and the power line carrier 4 in integrated coupling capacitor 3.
Each power line carrier 4 all is connected with a data terminal equipment 5.Power line carrier 4 is connected through the serial port interface with data terminal equipment 5, can adopt RS232 or RS485 serial ports to connect.
Can also realize that through Ethernet network be connected, the exchanges data between realization data terminal equipment 5 and the power line carrier 4 between power line carrier 4 and the data terminal equipment 5.
As shown in Figure 2; In the overhead transmission line power carrier communication system of the present invention; The first side winding of coupler in overhead transmission line 2, the integrated coupling capacitor 3, and, form carrier signal long-distance transmissions passage through the external the earth of first side winding in each integrated coupling capacitor 3.
Between the two-way bus 1 of present embodiment; Wherein the first side winding circuit connects any phase overhead transmission line 2 (being " C " phase overhead transmission line 2 in the present embodiment) in the three-phase overhead transmission line 2 in the integrated coupling capacitor 3 at one road bus, 1 place; Through first side winding in the integrated coupling capacitor 3 at this another road bus 1 place of phase overhead transmission line 2 circuit connection; This first side winding ground connection; Be connected to the first side winding of the integrated coupling capacitor 3 at former bus 1 place through the earth, the native system that makes forms a signal circuit.
The workflow of overhead transmission line power carrier communication system of the present invention is following:
In the time of need communicating between the two-way bus 1; The data terminal equipment 5 that wherein need export bus 1 place of signal transfers to power line carrier 4 with the signal of another road bus 1 that requires to be sent to; Power line carrier 4 with signal encode, modulation etc. handles the back and produces carrier signal; Transfer to the secondary side winding of integrated coupling capacitor 3 through the telecommunication cable of twin-core band screen; Secondary side winding couples a signal to first side winding, and first side winding then transfers to overhead transmission line 2 through the isolation capacitance of integrated coupling capacitor 3 with signal, and each integrated coupling capacitor 3 all is connected on this phase overhead transmission line 2.Signal is transferred to the first side winding of the integrated coupling capacitor 3 of another road bus 1 through overhead transmission line 2; This first side winding couples a signal to its secondary side winding; Secondary side winding transfers to power line carrier 4 through the telecommunication cable of twin-core band screen with signal again; After power line carrier 4 will receive the signal processing reduction, transfer to the data terminal equipment 5 of one road bus 1 of this reception signal.Through above-mentioned flow process, promptly accomplished the middle ballast ripple signal transmission between the two-way bus 1 in 10KV power circuit.
Although content of the present invention has been done detailed introduction through above-mentioned preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple modification of the present invention with to substitute all will be conspicuous.Therefore, protection scope of the present invention should be limited appended claim.
Claims (6)
1. overhead transmission line power carrier communication system, this system is arranged between the some buses (1) in the medium voltage distribution network circuit, and circuit is connected with three-phase overhead transmission line (2) between this bus; It is characterized in that this system comprises:
Several integrated coupling capacitors (3), itself and the corresponding one by one setting of described bus (1), several integrated coupling capacitors (3) all connect with same overhead transmission line mutually (2) circuit; Each integrated coupling capacitor (3) comprises the first side winding that circuit connects overhead transmission line (2), and with the secondary side winding of first side winding coupling, the two ends of its first side winding circuit respectively connect overhead transmission line (2) and ground connection;
Several power line carriers (4), it is connected with the secondary side winding circuit of integrated coupling capacitor (3) with the corresponding one by one setting of described integrated coupling capacitor (3), power line carrier (4);
Several data terminal equipments (5), itself and described power line carrier (4) connect one to one;
Described overhead transmission line (2), several integrated coupling capacitors (3), and, form carrier signal long-distance transmissions passage through the external the earth of each integrated coupling capacitor (3).
2. overhead transmission line power carrier communication system as claimed in claim 1 is characterized in that, each described integrated coupling capacitor (3) also comprises the isolation capacitance that is connected in series between overhead transmission line (2) and the first side winding.
3. cable shield power carrier communication system as claimed in claim 1 is characterized in that, adopts serial port to be connected between described power line carrier (6) and the data terminal equipment (7); Serial port adopts RS232 serial ports or RS485 serial ports.
4. cable shield power carrier communication system as claimed in claim 1 is characterized in that, adopts Ethernet to be connected between described power line carrier (6) and the data terminal equipment (7).
5. cable shield power carrier communication system as claimed in claim 1; It is characterized in that; Adopt the telecommunication cable of twin-core band screen to be connected between the secondary side winding of described power line carrier (6) and inductive coupler (5), transmission through coding, the carrier signal of modulation treatment.
6. cable shield power carrier communication system as claimed in claim 1 is characterized in that, described bus (1) and overhead transmission line (2) are arranged in the 10KV medium voltage distribution network circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100830588A CN102638291A (en) | 2012-03-27 | 2012-03-27 | Power carrier communication system of overhead line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100830588A CN102638291A (en) | 2012-03-27 | 2012-03-27 | Power carrier communication system of overhead line |
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| CN102638291A true CN102638291A (en) | 2012-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012100830588A Pending CN102638291A (en) | 2012-03-27 | 2012-03-27 | Power carrier communication system of overhead line |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105049087A (en) * | 2015-08-31 | 2015-11-11 | 上海泓语电气技术有限公司 | Power carrier system based on non-interconnected direct current lines |
| CN107342794A (en) * | 2017-08-15 | 2017-11-10 | 蓝洞物联科技（宁波）有限公司 | Integrated high-pressure wideband digital carrier terminal equipment |
| CN110971271A (en) * | 2019-12-02 | 2020-04-07 | 成都长城开发科技有限公司 | Power grid test method and test system |
| CN112260412A (en) * | 2020-09-27 | 2021-01-22 | 合肥新线通信科技有限公司 | Communication circuit, power supply circuit, communication and power supply circuit based on multiple shielding layers |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201126458Y (en) * | 2007-12-13 | 2008-10-01 | 上海中区节电科技有限公司 | Power line detection apparatus |
| CN202696599U (en) * | 2012-03-27 | 2013-01-23 | 上海市电力公司 | Power line carrier communication system of overhead line |
-
2012
- 2012-03-27 CN CN2012100830588A patent/CN102638291A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201126458Y (en) * | 2007-12-13 | 2008-10-01 | 上海中区节电科技有限公司 | Power line detection apparatus |
| CN202696599U (en) * | 2012-03-27 | 2013-01-23 | 上海市电力公司 | Power line carrier communication system of overhead line |
Non-Patent Citations (1)
| Title |
|---|
| 顾力等: "中压电力线载波通信在配电自动化系统中的应用分析", 《电工技术》, no. 03, 10 March 2011 (2011-03-10) * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105049087A (en) * | 2015-08-31 | 2015-11-11 | 上海泓语电气技术有限公司 | Power carrier system based on non-interconnected direct current lines |
| CN107342794A (en) * | 2017-08-15 | 2017-11-10 | 蓝洞物联科技（宁波）有限公司 | Integrated high-pressure wideband digital carrier terminal equipment |
| CN110971271A (en) * | 2019-12-02 | 2020-04-07 | 成都长城开发科技有限公司 | Power grid test method and test system |
| CN110971271B (en) * | 2019-12-02 | 2021-05-07 | 成都长城开发科技有限公司 | Power grid test method and test system |
| CN112260412A (en) * | 2020-09-27 | 2021-01-22 | 合肥新线通信科技有限公司 | Communication circuit, power supply circuit, communication and power supply circuit based on multiple shielding layers |
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Owner name: STATE ELECTRIC NET CROP. Effective date: 20121031 |
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Effective date of registration: 20121031 Address after: 200002 Nanjing East Road, Shanghai, No. 181, No. Applicant after: Shanghai Electric Power Corporation Applicant after: State Grid Corporation of China Address before: 200002 Nanjing East Road, Shanghai, No. 181, No. Applicant before: Shanghai Electric Power Corporation |
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Application publication date: 20120815 |