CN103634029B - Be applicable to broadband power line carrier system and the network-building method of intelligent substation communication - Google Patents
Be applicable to broadband power line carrier system and the network-building method of intelligent substation communication Download PDFInfo
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Abstract
The present invention relates to a kind of broadband power line carrier system and the network-building method that are applicable to intelligent substation communication, belong to PLC technology field.The present invention includes Embedded Broad-band carrier wave system, this system comprises Ethernet parts, PLC modulation /demodulation parts, carrier signal coupling unit and power supply adaptor parts, and high being integrated on printed circuit board of above-mentioned parts also connects successively.The advantageous effect such as the present invention is owing to adopting OFDM modulation mechanism, and therefore tool effectively can overcome intersymbol interference, antijamming capability is strong, and band efficiency is high, and communication bandwidth is high, and the equilibrium of system is simple.Owing to adopting damascene structures, therefore also there is structure simple, be easy to expansion, easy to use, the advantage such as safe and reliable.In intelligent substation, use J-carrier system networking to meet completely manage main website with uplink information, belonging to descending transformer station, branch carries out information data transmission, realizes the intellectuality of transformer station.
Description
Technical field
The present invention relates to a kind of broadband power line carrier system and the network-building method that are applicable to intelligent substation communication, belong to PLC technology field.
Background technology
Power carrier (PowerLineCarrier; Be called for short: PLC) be the distinctive communication mode of electric power system.Refer to power line to be transmission medium, utilize ZAP, signal of communication is modulated in electrical network and carries out high-speed transfer, realize a kind of communication mode of transmission of information between each node in electrical network.The maximum feature of power line carrier, PLC is without the need to again setting up network, and have price lower, installation and maintenance are easy, private network communication, is easy to expansion, the series of advantages such as transparent transmission.Along with the development of intelligent grid, the construction of intelligent substation also in actively pushing forward, but on the one hand because intelligent substation investment is huge, causes construction progress slow, on the other hand in the construction of intelligent substation, also has some technical problems to need to improve.Relative to traditional transformer station, in intelligent substation, various Informationization Equipment is of a great variety, needs the intelligent communication network of high bandwidth, to realize high efficiency of transmission, unified management.Existing carrier wave system is undesirable to the noise processed effect in power line, antijamming capability is not strong, communication reliability is not high, communication bandwidth also cannot meet the growing transmission request message of intelligent substation gradually, and system peripheral devices is various, bring complexity and the Cost Problems of many designs to later stage constructing communication network.
Summary of the invention
The invention provides a kind of broadband power line carrier system and the network-building method that are applicable to intelligent substation communication.Its objective is and solve existing power line carrier system antijamming capability by force, communication speed is not high, and communication is unreliable, the problem of networking complexity.
The technical solution adopted for the present invention to solve the technical problems is:
Be applicable to the broadband power line carrier system of intelligent substation communication, comprise Embedded Broad-band carrier wave system, this system comprises Ethernet parts, PLC modulation /demodulation parts, carrier signal coupling unit and power supply adaptor parts, high being integrated on printed circuit board of above-mentioned parts also connects successively.
Described PLC modulation /demodulation parts comprise containing bandwidth carrier chip and front end signal amplification chip; Described bandwidth carrier chip adopts the bandwidth carrier chip of MARVELL company: DSS950X; Described front end signal amplification chip adopts the front end signal amplification chip of MARVELL company: DSS7800; Chip frequency of utilization bandwidth is 2-34MHZ, and modulation system adopts orthogonal frequency division multiplexer (OFDM), and is provided with jtag interface.
Described power supply adaptor parts both can be whole system and had powered, can be connected with carrier signal coupling unit again, PLC modulation /demodulation parts are sent to by the carrier signal of power line, PLC modulation /demodulation parts are used for that the signal coming from power line is carried out demodulation and are reduced to network signal, by Ethernet part transfers to terminal equipment; Otherwise, and the network signal coming from Ethernet parts is modulated on power line transmits.
Described OFDM modulation mode is a kind of multi-carrier modulation, the subcarrier that a carrier wave is divided into many bandwidth narrower by this mode, and these subcarriers are mutually orthogonal, adopts fast fourier transform to be encoded by these subcarrier signals; Signal reverses by subcarrier frequency demultiplexer, make it orthogonal, for n subcarrier, the character rate of each subcarrier is divided into the 1/n of whole character rate by carrier modulator, and this makes to modulate rear character rate and is longer than multidiameter thus reduces intersymbol interference (ISI).
Described carrier signal coupling unit is coupler; Described PLC modulation /demodulation parts are power interface.
Described power interface, power supply adaptor parts are connected successively with carrier signal coupling unit coupler; Coupler is connected successively with front end signal amplification chip, bandwidth carrier chip; Bandwidth carrier chip is connected respectively with flash memory, jtag interface parts, reset system parts, LED light; Bandwidth carrier chip is connected successively with Ethernet parts, Ethernet data interface; Said chip and parts are high is integrated on printed circuit board, and circuit board corner is provided with the punching in just broadband power carrier communication system and the embedded combination of terminal equipment.
The data that described Ethernet data interface sends from transformer station process layer primary equipment, Ethernet parts are transferred to again by the Ethernet data interface in process layer devices Embedded Broad-band carrier wave system, then bandwidth carrier chip is exported to by the industrial MII interface of standard, data in bandwidth carrier chip by carrying out serial/parallel conversion to data, the a series of process such as D/A switch and modulation become OFDM analog signal, after carrying out high frequency analog signals amplification and signal filtering by front end signal amplification chip, be sent on carrier signal coupling unit, be coupled on the power line of power interface connection finally by carrier signal coupling unit, transfer in intelligent substation wall system embedment formula broadband power line carrier system,
Intelligent substation bay device Embedded Broad-band carrier wave system receives the OFDM analog signal of coming from power line and transfers to carrier signal coupling unit through power interface, transfer to front end signal amplification chip successively again, front end signal amplification chip transfers to bandwidth carrier chip to after its operation of being correlated with, bandwidth carrier chip carries out OFDM demodulation process to data and is transferred to Ethernet parts after changing digital signal into, and Ethernet parts the most at last signal deliver to bay device by Ethernet data interface;
In like manner, bay device communicates with station level equipment after carrying out modulating/demodulating by Embedded Broad-band carrier system to signal; Meanwhile, meanwhile, bandwidth carrier chip is connected with flash memory; Bandwidth carrier chip is connected with jtag interface; Bandwidth carrier chip is connected with reset system parts; Bandwidth carrier chip is connected with LED light.
The model of described flash memory selects 64Mbit.
Be applicable to the network-building method of the broadband power line carrier system of intelligent substation communication, be in process layer devices side, bay device side, station level equipment side add respectively and put Embedded Broad-band carrier wave system, process layer primary equipment image data is modulated to OFDM analog signal through Embedded Broad-band carrier wave system and injects power line transmission to wall Embedded Broad-band carrier wave system, transmits and be collected to bay device after wall Embedded Broad-band carrier wave system is demodulated into digital signal; In like manner, signal that bay device collects is sent to station level equipment after broadband power line carrier system modulating/demodulating.
The invention has the beneficial effects as follows: owing to adopting OFDM modulation mechanism, therefore tool effectively can overcome intersymbol interference, antijamming capability is strong, and band efficiency is high, and communication bandwidth is high, the advantageous effect such as the equilibrium of system is simple.Owing to adopting damascene structures, therefore also there is structure simple, be easy to expansion, easy to use, the advantage such as safe and reliable.In intelligent substation, use J-carrier system networking to meet completely manage main website with uplink information, belonging to descending transformer station, branch carries out information data transmission, realizes the intellectuality of transformer station.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 is carrier system structural representation of the present invention;
Fig. 2 is networking mode schematic diagram in intelligent substation of the present invention.
In figure: bandwidth carrier chip 1, front end signal amplification chip 2, coupler 3, power interface 4, power supply adaptor parts 5, flash memory 6, Ethernet parts 7, Ethernet data interface 8, JTEG interface unit 9, reset system parts 10, LED light 11.
Embodiment
The present invention is a kind of broadband power line carrier system and network-building method of being applicable to intelligent substation communication, this system comprises Embedded Broad-band carrier wave system, it has Ethernet parts, PLC modulation /demodulation parts, carrier signal coupling unit, power supply adaptor parts, high being integrated on printed circuit board of above-mentioned parts also connects successively.Described PLC modulation /demodulation parts comprise bandwidth carrier chip 1 and front end signal amplification chip 2.Described power supply adaptor parts 5, both can be whole system to power, can connect with carrier signal coupling unit again, carrier signal by power line is sent to PLC modulation /demodulation parts, PLC modulation /demodulation parts are used for that the signal coming from power line is carried out demodulation and are reduced to network signal, transfer to terminal equipment by Ethernet parts 7; Otherwise, and the network signal coming from Ethernet parts 7 is modulated on power line transmits.
Intelligent substation is divided into process layer, wall and station level.Process layer comprises the primary equipments such as transformer, circuit breaker, isolating switch, current/voltage instrument transformer and affiliated intelligent assembly thereof and independently smart electronics system; Bay device refers generally to the secondary devices such as relaying protection system, system monitoring system, the main IED of monitoring function, realize the data at a use interval and act on the function of this interval primary equipment, its realization communicates with controller with various distant places input-output apparatus, transducer; Station level comprises automated station level supervisor control, stand that territory controls, communication system and pair time system etc.; realize towards the supervision of full station equipment, control, alarm and information interaction function, the correlation functions such as data acquisition and Monitor and Control (SCADA), operation locking and synchronous vector collection, electric energy acquisition, protection information management.
The technical scheme that network-building method of the present invention realizes is: in process layer devices side, bay device side, station level equipment side add respectively and put Embedded Broad-band carrier wave system, process layer primary equipment image data is modulated to OFDM analog signal through Embedded Broad-band carrier wave system and injects power line transmission to wall Embedded Broad-band carrier wave system, transmits and be collected to bay device after wall Embedded Broad-band carrier wave system is demodulated into digital signal; In like manner, signal that bay device collects is sent to station level equipment after broadband power line carrier system modulating/demodulating.
Wherein, PLC modulation /demodulation parts middle width strip carrier chip 1 adopts the DSS950X carrier chip of MARVELL company, front end signal amplification chip 2 adopts the DSS7800 chip of MARVELL company, chip frequency of utilization bandwidth 2-34MHZ, modulation system adopts orthogonal frequency division multiplexer (OFDM), 128 AES of chip internal integrated programmable, 256 AES, with 3DES hardware-based cryptographic, safe and reliable.And be provided with jtag interface, conveniently carry out boundary scan and selftest.Meanwhile, bandwidth carrier communication chip can realize any width frequency range completely and use, and reaches the height of frequency range and the controllability of width, realizes frequency division networking for multilink networking, avoid disturbing between frequency.
OFDM modulation mode is a kind of multi-carrier modulation, the subcarrier that a carrier wave is divided into many bandwidth narrower by this mode, and these subcarriers are mutually orthogonal, adopts fast fourier transform to be encoded by these subcarrier signals.Signal reverses by subcarrier frequency demultiplexer, make it orthogonal, for n subcarrier, the character rate of each subcarrier is divided into the 1/n of whole character rate by carrier modulator, and this makes to modulate rear character rate and is longer than multidiameter thus reduces intersymbol interference (ISI).
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described.As shown in Figure 1: power interface 4, power supply adaptor parts 5 are connected successively with carrier signal coupling unit coupler 3, carrier signal coupling unit coupler 3 and front end signal amplification chip 2, bandwidth carrier chip 1 is connected successively, bandwidth carrier chip 1 and flash memory 6, JTEG interface unit 9, reset system parts 10, LED light 11 is connected respectively, bandwidth carrier chip 1 and Ethernet parts 7, Ethernet data interface 8 is connected successively, said chip and parts are high is integrated on printed circuit board, and circuit board corner is provided with punching, facilitate broadband power carrier communication system and the embedded combination of terminal equipment.
From the data that transformer station process layer primary equipment sends, Ethernet parts 7 are transferred to by the Ethernet data interface 8 in process layer devices Embedded Broad-band carrier wave system, then bandwidth carrier chip 1 is exported to by the industrial MII interface of standard, data in bandwidth carrier chip 1 by carrying out serial/parallel conversion to data, the a series of process such as D/A switch and modulation become OFDM analog signal, after carrying out high frequency analog signals amplification and signal filtering by front end signal amplification chip 2, be sent on carrier signal coupling unit coupler 3, be coupled on the power line of power interface 4 connection finally by carrier signal coupling unit coupler 3, transfer in intelligent substation wall system embedment formula broadband power line carrier system.Intelligent substation bay device Embedded Broad-band carrier wave system receives the OFDM analog signal of coming from power line and transfers to carrier signal coupling unit coupler 3 through power interface 4, transfer to front end signal amplification chip 2 successively again, front end signal amplification chip 2 transfers to bandwidth carrier chip 1 to after its operation of being correlated with, carrier chip 1 pair of data are carried out OFDM demodulation process and are transferred to Ethernet parts 7 after changing digital signal into, and Ethernet parts 7 the most at last signal deliver to bay device by Ethernet data interface 8.In like manner, bay device communicates with station level equipment after carrying out modulating/demodulating by Embedded Broad-band carrier system to signal.Meanwhile, bandwidth carrier chip 1 is connected with flash memory 6, is convenient to carry out buffer memory to data; Bandwidth carrier chip 1 is connected with JTEG interface unit 9, is convenient to debug internal system; Bandwidth carrier chip 1 is connected with reset system parts, is convenient to manually reset operation to system; Bandwidth carrier chip 1 is connected with LED light 11, is convenient to monitor system mode.Described flash memory 6 is 64Mbit.
As mentioned above, embodiments of the invention have been described in detail, but as long as do not depart from inventive point of the present invention in fact and effect can have a lot of distortion, this will be readily apparent to persons skilled in the art.Therefore, such variation is also all included within protection scope of the present invention.
Claims (1)
1. be applicable to the broadband power line carrier system of intelligent substation communication, it is characterized in that: comprise Embedded Broad-band carrier wave system, this system comprises Ethernet parts (7), PLC modulation /demodulation parts, carrier signal coupling unit and power supply adaptor parts (5), high being integrated on printed circuit board of above-mentioned parts also connects successively;
Described PLC modulation /demodulation parts comprise bandwidth carrier chip (1) and front end signal amplification chip (2); Described bandwidth carrier chip (1) adopts the bandwidth carrier chip of MARVELL company: DSS950X; Described front end signal amplification chip (2) adopts the front end signal amplification chip of MARVELL company: DSS7800; Chip frequency of utilization bandwidth is 2-34MHZ, and modulation system adopts orthogonal frequency division multiplexer OFDM, and is provided with jtag interface;
Described power supply adaptor parts (5) both can be whole system and had powered, can be connected with carrier signal coupling unit again, PLC modulation /demodulation parts are sent to by the carrier signal of power line, PLC modulation /demodulation parts are used for that the signal coming from power line is carried out demodulation and are reduced to network signal, transfer to terminal equipment by Ethernet parts (7); Otherwise, the network signal coming from Ethernet parts (7) is modulated on power line and transmits;
Described OFDM modulation mode is a kind of multi-carrier modulation, the subcarrier that a carrier wave is divided into many bandwidth narrower by this mode, and these subcarriers are mutually orthogonal, adopts fast fourier transform to be encoded by these subcarrier signals; Signal reverses by subcarrier frequency demultiplexer, make it orthogonal, for n subcarrier, the character rate of each subcarrier is divided into the 1/n of whole character rate by carrier modulator, and this makes to modulate rear character rate and is longer than multidiameter thus reduces intersymbol interference (ISI);
Described carrier signal coupling unit is coupler (3); Described PLC modulation /demodulation parts are power interface (4);
Described power interface (4), power supply adaptor parts (5) are connected successively with carrier signal coupling unit coupler (3), coupler (3) is connected successively with front end signal amplification chip (2), bandwidth carrier chip (1), bandwidth carrier chip (1) is connected respectively with flash memory (6), jtag interface parts (9), reset system parts (10), LED light (11), bandwidth carrier chip (1) is connected successively with Ethernet parts (7), Ethernet data interface (8), said chip and parts are high is integrated on printed circuit board, and circuit board corner is provided with the punching facilitating broadband power carrier communication system and the embedded combination of terminal equipment, described Ethernet data interface (8) receives the data of sending from transformer station process layer primary equipment, Ethernet parts (7) are transferred to again by the Ethernet data interface (8) in process layer devices Embedded Broad-band carrier wave system, then bandwidth carrier chip (1) is exported to by the industrial MII interface of standard, data in bandwidth carrier chip (1) by carrying out serial/parallel conversion to data, the a series of process such as D/A switch and modulation become OFDM analog signal, after carrying out high frequency analog signals amplification and signal filtering by front end signal amplification chip (2), be sent on carrier signal coupling unit, be coupled on the power line that power interface (4) connects finally by carrier signal coupling unit, transfer in intelligent substation wall system embedment formula broadband power line carrier system, intelligent substation bay device Embedded Broad-band carrier wave system receives the OFDM analog signal of coming from power line and transfers to carrier signal coupling unit through power interface (4), transfer to front end signal amplification chip (2) more successively, front end signal amplification chip (2) transfers to bandwidth carrier chip (1) to after its operation of being correlated with, bandwidth carrier chip (1) carries out OFDM demodulation process to data and is transferred to Ethernet parts (7) after changing digital signal into, Ethernet parts (7) the most at last signal deliver to bay device by Ethernet data interface (8), in like manner, bay device communicates with station level equipment after carrying out modulating/demodulating by Embedded Broad-band carrier system to signal, meanwhile, bandwidth carrier chip (1) is connected with flash memory (6), bandwidth carrier chip (1) is connected with jtag interface (9), bandwidth carrier chip (1) is connected with reset system parts (10), bandwidth carrier chip (1) is connected with LED light (11), the model of described flash memory (6) selects 64Mbit,
Utilize the above-mentioned network-building method being applicable to the broadband power line carrier system of intelligent substation communication: be in process layer devices side, bay device side, station level equipment side add respectively and put Embedded Broad-band carrier wave system, process layer primary equipment image data is modulated to OFDM analog signal through Embedded Broad-band carrier wave system and injects power line transmission to wall Embedded Broad-band carrier wave system, transmits and be collected to bay device after wall Embedded Broad-band carrier wave system is demodulated into digital signal; In like manner, signal that bay device collects is sent to station level equipment after broadband power line carrier system modulating/demodulating.
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105207697A (en) * | 2015-08-28 | 2015-12-30 | 北京泰豪电力科技有限公司 | Broadband carrier communication module of power line |
| CN107590986A (en) * | 2017-09-27 | 2018-01-16 | 广东电网有限责任公司应急抢修中心 | A kind of electric power data acquisition system based on bandwidth carrier |
| CN107769818B (en) * | 2017-10-11 | 2021-02-19 | 北京电联宇科技股份有限公司 | Broadband power carrier processing method and device |
| CN110048744A (en) * | 2018-01-16 | 2019-07-23 | 北京航天长征飞行器研究所 | A kind of power supply adaptor of power wire broadband carrier communication |
| CN110687368B (en) * | 2019-07-16 | 2022-03-25 | 深圳智微电子科技有限公司 | OFDM carrier signal-based transformer state online monitoring method |
| CN113315544B (en) * | 2020-02-27 | 2023-02-17 | 山东亚华电子股份有限公司 | Wiring system and method based on hospital informatization |
| CN111835384A (en) * | 2020-07-27 | 2020-10-27 | 珠海格力电器股份有限公司 | Power line carrier communication power module, power line carrier communication cable and magnetic suspension motor system |
| CN112564281B (en) * | 2020-12-01 | 2023-03-21 | 广东电网有限责任公司江门供电局 | Monitoring background signal remote transmission device for transformer substation |
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