CN206323214U - Photovoltaic power station power carrier communication system - Google Patents
Photovoltaic power station power carrier communication system Download PDFInfo
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- CN206323214U CN206323214U CN201621346168.9U CN201621346168U CN206323214U CN 206323214 U CN206323214 U CN 206323214U CN 201621346168 U CN201621346168 U CN 201621346168U CN 206323214 U CN206323214 U CN 206323214U
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- photovoltaic
- power
- carrier
- power line
- signal
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/16—Electric power substations
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- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
The utility model provides a kind of photovoltaic power station power carrier communication system, including multiple photovoltaic subsystems, and each subsystem is integrated with respective solar panel array, inverter and communication module, it is characterised in that：Communication module is provided with power line carrier transmitting-receiving machine；Solar panel array dc bus is reverse into alternating current by photovoltaic DC-to-AC converter, and accesses power network, and carrier transceiver is directly communicated using existing power line；The status information of the monitored object such as solar panel array, inverter, multifunctional meter in power station, is sent in photovoltaic DC-to-AC converter by communication module.This patent scheme is improved system monitoring efficiency, is reduced O＆M cost using existing power line transmission photovoltaic plant Real-time Monitoring Data.
Description
Technical field
The utility model is related to technical field of electric power communication, is specifically related to a kind of electric power of photovoltaic power station
Carrier communication system.
Background technology
With the popularization of photovoltaic generation, its corresponding technical problem is also gradually displayed.Intensity of illumination, geographical position,
Weather condition, the factor such as ambient climate all can produce influence to the power output of photovoltaic array, obtain real time data, be conducive to light
Lie prostrate the tracking of maximum power point.Meanwhile, photovoltaic plant is typically built more from far-off regions, and scale is also very big, once photovoltaic
Component goes wrong, and can directly damage the interests of user, and simultaneous faults investigation can also consume a large amount of manpower and materials.If independent frame
It is a very huge engineering again, it is necessary to spend very big investment if communication and monitoring circuit.One kind is devised herein to be based on
The photovoltaic plant Monitoring Data transport module of power-line carrier communication.The module makes power line carrier using microprocessor
Transceiver, and communicated using existing power circuit, the real time data of photovoltaic plant working condition can be both obtained, so as to
Photovoltaic module is adjusted, while it also avoid individually setting up monitoring and communication network, the investment of power plant construction is reduced.
Utility model content
Technical problem to be solved in the utility model is to overcome problems of the prior art to divide there is provided one kind
Cloth photovoltaic plant power carrier communication system.
In order to which the technical solution of the utility model that solves the above problems is such：
Photovoltaic power station power carrier communication system, including multiple photovoltaic subsystems, each subsystem are integrated with respectively
From solar panel array, inverter and communication module, it is characterised in that：
Communication module is provided with power line carrier transmitting-receiving machine；
Solar panel array dc bus is reverse into alternating current by photovoltaic DC-to-AC converter, and accesses power network, and carrier wave is received
Hair machine is directly communicated using existing power line；
The status information of the monitored object such as solar panel array, inverter, multifunctional meter in power station, passes through communication
Module is sent in photovoltaic DC-to-AC converter.
The data signal of the communication module uses RS-232 or RS485 interfaces, and power line will be connected with carrier transceiver
All user equipmenies be built into a data network, realize the data transfer between distribution power automation terminal.
The carrier frequency of the communication module:10kHz~500kHz, carriers rate 600bps~1Mbps, transmission range<
5km, dynamic range>85dB, transmission error rates<10-12, receiving sensitivity<1mV, received signal to noise ratio is better than -3dB.
Each photovoltaic subsystem is provided with photovoltaic module monitor, and photovoltaic module monitor is believed the meteorology around photovoltaic module
The energy output information of breath and photovoltaic module is acquired, and the information of collection is converted into corresponding data form, passed to
Communication module；Communication module is received after information, then passes data to monitoring PC, and staff is according to gained information to photovoltaic
The working condition of module is adjusted, and adjustment control information is again converted into corresponding data form, is passed by communication module
In the monitor for passing each photovoltaic module, photovoltaic module is adjusted.
The coupled modes of carrier signal use Capacitance Coupled；Capacitance Coupled uses coupled capacitor device for main element, utilizes
The input or output end of high-frequency carrier signal are connected by coupled capacitor with power line access point, and high-frequency carrier signal is directly noted
Enter power network, high-frequency carrier signal is received from power line.
Beneficial effect：
1st, technical scheme described in the utility model realizes the best product of electric energy.When some photovoltaic module breaks down
When, its electric energy production can be greatly lowered, and now staff can lock abort situation quickly, and be repaired accordingly.
2. multiband self adaptation and multi-modulation technology are employed, advanced Digital Signal Processing and the universal standard
Communication protocol, by the use of power line as data transmission channel, improves the reliability of communication, can have the low of very noisy interference
Reliable and stable data transfer is realized on press-fitting electric wire, photovoltaic plant monitoring device can be met row data communication is entered by power line
The need for.
3. power line carrier technology is also possible that real-time online：Power line communication network belongs to " plug and play ", accesses power supply
It is equal to connect communication network.
It is in extensive range：The scale of power line will be wide than other communication networks, and its coverage is incomparable.
Flexibly highly：With automatic routing function, communication network is more flexible, and signal will not be obstructed.
, can be in power line with powerful anti-multipath fading and antijamming capability 4. power line uses OFDM technology
Realize reliable quick transmission data.
5. in power-line carrier communication system, the coupled modes of carrier signal use Capacitance Coupled.Capacitance Coupled uses coupling
Conjunction capacitor is main element, is connected the input or output end of high-frequency carrier signal and power line access point using coupled capacitor
Connect, high-frequency carrier signal is directly injected into power network, or receive from power line high-frequency carrier signal.
6. we by the network communication protocol software of the Power Line Carrier Communication Module of realization to being divided into three layers：Physical layer,
Data link layer, application layer (contain Network layer function) are designed, and are entered between each layer by interface function with specific data structure
The transmission of row information, ensures the independence between each layer as much as possible.
7. the utility model make use of the PLC technology of power carrier, the PC of Surveillance center is sent to control concentrator to be read
The order for the number of winning the confidence, header box is received after order, is loaded the information on power line, is transferred to concentrator, finally feeding prison
The PC of control terminal.
Brief description of the drawings
Describe the utility model in detail with reference to the accompanying drawings and detailed description；
Fig. 1 is that power carrier described in the utility model application network topological diagram in photovoltaic plant is intended to.
Fig. 2 is described PLC transmission basic block diagrams of the present utility model.
Fig. 3 is described signal amplification circuit filter figure of the present utility model.
Fig. 4 is described signal coupling circuit figure of the present utility model.
Fig. 5 is described each layer function main points of communication protocol of the present utility model and specific algorithm table.
Embodiment
In order that technological means, creation characteristic, reached purpose and effect that the utility model is realized are easy to understand, under
Face combines and is specifically illustrating, and the utility model is expanded on further.
Referring to Fig. 1, low-voltage powerline carrier communication is to be used as the one of high frequency signal transmission passage by the use of 220V transmission lines of electricity
Plant communication means.According to frequency translation, primary signal is repeatedly modulated, moved not collinear by frequency division principle to carrier wave
Road transmission band, is then fed into circuit and is transmitted, so as to realize multichannel communication multiple telecommunication.
Multiband self adaptation and multi-modulation technology are employed, advanced Digital Signal Processing and the universal standard are logical
Believe agreement, by the use of power line as data transmission channel, these core technologies significantly improve receiving ability, improve communication
Reliability, can have very noisy disturb low-voltage distribution wire on realize reliable and stable data transfer, low tension can be met
The need for power monitoring device enters row data communication by power line.
Data signal uses RS-232 or RS485 interfaces, all user equipmenies being connected by power line with Carrier
A data network is built into, the transparent data transfer between distribution power automation terminal is realized, can be widely applied to low-voltage line
Power distribution automation on road, in the data communication of industrial control system.
Power line channel has complicated noise characteristic, attenuation characteristic and impedance operator, and in different location and not
The same period, characteristic has larger difference, shows time variation again.In order to be able to effectively carry out power line carrier communication, it is necessary to
Power line channel is carried out rational it is assumed that taking suitable model to analyze the characteristic of channel.Due to power line channel communication loop
Border is severe, and signal transmission may undergo mulitpath and with larger fluctuating and fluctuation, and OFDM technology has powerful resist
Multipath fading and antijamming capability, can realize reliable quick transmission data in power line.
In power-line carrier communication system, the coupled modes of carrier signal have Capacitance Coupled, inductive, antenna coupling
Etc. several ways, wherein Capacitance Coupled and inductive are the two kinds of coupled modes commonly used in low-voltage network.
Software is allowed for using the purpose of hierarchical design ease for maintenance is portable with expansible upgradability.We are right
The network communication protocol software of the Power Line Carrier Communication Module of realization is divided into three layers：Physical layer, data link layer, application layer
(contain Network layer function) is designed, enters the transmission of row information between each layer by interface function and specific data structure, to the greatest extent may be used
Energy ground ensures the independence between each layer.
Carrier frequency:10kHz~500kHz, carriers rate 600bps~1Mbps, transmission range<5km, dynamic range>
85dB, transmission error rates<10-12, receiving sensitivity<1mV, received signal to noise ratio is better than -3dB.
Referring to Fig. 2, photovoltaic plant is mainly made up of multiple photovoltaic subsystems, and each subsystem is integrated with respective solar energy
Panel array, inverter and communication module (i.e. power line carrier transmitting-receiving machine).Solar panel array dc bus passes through
Photovoltaic DC-to-AC converter is reverse into alternating current, and accesses power network, and carrier transceiver is directly communicated using existing power line.In module
Photovoltaic module and converter status information, by communication module be sent to concentration inverter in.Man-machine interface is provided
The system control interface information related to display.
Referring to Fig. 3, some jamproof principles of this practical patent are as follows：D21And D22It is protection diode, plays electricity
The effect of pressing tongs position, suppresses impulse of the interference signal on power line to internal circuit；Q1、Q2、Q3、Q4、R11And R12Collectively constitute
Unit gain is inverted Darlington output stage, wherein Q1, Q3And R12Constitute p-type multiple tube, Q2、Q4、R11N-type multiple tube is constituted, wherein
Q1And Q2On electric current it is very big, it requires good heat dispersion, needed relevant plug-in unit to encapsulate herein.Q5And Q6And its
Surrounding resistance capacitance collectively constitutes voltage amplifier stage, wherein R18And R19Bleeder circuit is constituted, the resistance for changing the two resistance can
Adjust quiescent point, R16To Q6Bias current, R are provided15To Q5Bias current, R are provided14And R17Negative feedback loop is provided, adjusted
The ratio of the two whole resistance can change the gain of the amplifying circuit；C12Play high frequency compensation, prevent the higher-order of oscillation.Q7、
Q8、R22、R21、R23And R24The enable control of power-amplifier stage is constituted, when Enable Pin is low level, amplifying circuit will export high
Resistance state, do not interfere with the input of power line carrier signal, it is ensured that carrier communication receives performance.R01, C11And L11Composition series connection band
Bandpass filter circuit, when exporting high current, will not make carrier signal serious distortion, meanwhile, when in input state, it can disappear
Except part out-of-band interference, amplifying circuit, R are protected01Effect be increase amplifying circuit internal resistance, prevent from damaging when external impedance is too small
Bad circuit.
The signal mode principle used referring to Fig. 4, this practical patent：Shown circuit be Capacitance Coupled, its function be from
Power line is coupled to receive signal, and signal is accepted filter.
Wherein, electric capacity C1With coupling transformer T1Constitute high-pass filtering circuit.Coupling transformer T1Not only can be by coupling electricity
Road isolates with the power line of high pressure, the conversion of impedance can also be carried out, to realize impedance matching.Coupled capacitor C1Not only can be with coupling
High-frequency signal is closed, the buffer action to high pressure power frequency is also acted as.Voltage-regulator diode F1It is 12V Transient Voltage Suppressor (TVS),
It can ensure that the terminal voltage of internal circuit is stable, can also stablize in the case of having larger voltge surge in 12V, so as to protect
Protect internal circuit.Receiving circuit utilizes electric capacity and inductance, builds termination power, signal is received using the principle of resonance.
Referring to Fig. 5,3 layer network protocol theory tables used in this practical patent.
Physical layer:
Physical layer goes out to handle the transmission in transmission media of bit stream, and it is related to the numerous characteristics of electrically and mechanically aspect.
Physical layer is responsible for transmission of the bit stream from a node to another node.The specific tasks of physical layer are defining interface and medium
Physical characteristic.There is following concept in physical layer：Line coding：By digital signals format from simple 1/0 format conversion
To be suitable for the form of physical medium characteristic, contribute to bit synchronization and frame synchronization.Bit synchronization：Receiving-transmitting sides bit stream is provided
It is synchronous, to ensure that both sides use identical bit period and sequential.Bit synchronization is realized with digital phase-locked loop.Line connection：
The connection of two equipment point-to-points and multiple equipment share transmission media physical topological structure：Netted, star, bus-type and annular are even
Connect transmission means：Half work, half-duplex and full duplex
Within the physical layer, the coding to data, modulation to be realized and is multiplexed.Different manchester encoding skill is used in design
Art, with respect to the multiplexing technology of the modulation technique of phase modulation, and OFDM.
Link layer:
Data link layer is responsible for the transmission from a node (jump) to next node (jump) frame.Specific tasks are：
Framing：Protocol header and agreement tail is added just to constitute frame the data that Internet friendship comes；
Physical address：Physical address should be included in frame, to show the address of the frame person of transmitting/receiving.
Flow is controlled：Solve to send the fast and slow overflow problem of reception
Error Control：Solve the Problem-Error of frame in the transmission
Access control：Same circuit (shared) is connected in multiple equipment, solves how each equipment obtains shared route
Access right.
When signal is from physical layer transmission to data link layer, error detection and debugging are carried out to signal first, check bit knot is checked
Shu Hou, starts framing, selects suitable agreement in MAC layer and LLC layer respectively, and frame progress debugging control and flow are controlled.
Application layer:
The power line carrier modulation device selects carrier sense multiple access/conflict avoidance (CSMA/CA) mechanism, is sending
Whether there is collision signal on automatic detection circuit before data, conflict is avoided with this.If detecting has signal on channel,
The time with captain is waited, detects on channel whether there is signal again.
This practical patent is in power line carrier communication chip circuit module, by electric power line carrier chip and its outside
Enclose circuit：Signal input and output are filtered, and signal coupling circuit, functional analysis obtains the function of general hardware circuit with reference to block diagram,
Specify its application.
In signal delivery and reception module, signal input filter circuit, signal amplification circuit filter are devised.Signal is defeated
Enter filter circuit further to filter signal, exclude the interference of other harmonic waves；Signal amplification circuit is put for signal
Big and simple filtering, makes with enough energy in power line interface partial circuit module, and signal coupling circuit is by signal coupling
Close on power line.
It is the network application based on power industry, three to four layers that the hierarchical structure of communication protocol software model, which designs this project,
Division is functionally enough, therefore to devise physical layer, link layer, three layers of application layer.
In the design of physical layer, using different manchester encoding, to eliminate the flip-flop of signal；Using relative tune
The modulation technique of phase, to reduce the mistake being likely to occur, such as " paraphase "；Using orthogonal frequency division multiplexi, done with reducing intersymbol
Disturb, improve communication quality, improve the availability of frequency spectrum.In the design of link layer, power line carrier when link layer is communicated,
EDC error detection and correction is carried out to signal first, signal check bit tested whether in physical layer transmission with CRC check code
Error；Framing is carried out afterwards, and here from the framing of bit-oriented protocol, after framing, ARQ agreements are selected in LLC sublayers, point
The characteristic of channel is analysed, selection rollback N frame ARQ agreements carry out Error Control to frame, in media access control sublayer selection random access control protocol
CSMA/CA (Carrier Sense Multiple Access with conflict avoidance) agreement, coordinate access of the multiple equipment to shared link, it is to avoid
Conflict, it is ensured that the normal transmission of signal.
Compared with traditional energy, photovoltaic generation, which has become, more to be cleaned, technically leading alternative energy source.Solar energy
With its unique advantage, it is developed can obtain tremendous development in 21 century, and take on weight in world's energy resource structure at last
Appoint, as the leading energy.Photovoltaic power station scene has the spies such as monomer small scale, total amount are huge, scattered, environment is complicated
Point, it is impossible to according to traditional energy O＆M mode, needs each distributed power station of centralized management and realizes that power station scene is unattended.Profit
Power line carrier transceiver is used, the cost of monitoring network laying has both been reduced, it is unattended to realize power station, and power station is improved again
The efficiency of maintenance, there is very big practicality.
General principle of the present utility model, principal character and advantage of the present utility model has been shown and described above.One's own profession
The technical staff of industry is it should be appreciated that the utility model is not restricted to the described embodiments, described in above-described embodiment and specification
Simply illustrate principle of the present utility model, the utility model can also on the premise of the utility model spirit and scope are not departed from
There are various changes and modifications, these changes and improvements are both fallen within the range of claimed the utility model.The utility model is special
The claimed scope of profit is defined by appending claims and its equivalent.
Claims (5)
1. photovoltaic power station power carrier communication system, including multiple photovoltaic subsystems, each subsystem are integrated with each
Solar panel array, inverter and communication module, it is characterised in that：
Communication module is provided with power line carrier transmitting-receiving machine；
Solar panel array dc bus is reverse into alternating current by photovoltaic DC-to-AC converter, and accesses power network, carrier transceiver
Directly communicated using existing power line；
Solar panel array, inverter, the status information of multifunctional meter in power station, photovoltaic is sent to by communication module
In inverter.
2. photovoltaic power station power carrier communication system according to claim 1, it is characterised in that the communication mould
The data signal of block uses RS-232 or RS485 interfaces, and power line builds all user equipmenies being connected with carrier transceiver
Into a data network, the data transfer between distribution power automation terminal is realized.
3. photovoltaic power station power carrier communication system according to claim 1, it is characterised in that the communication mould
The carrier frequency of block:10kHz~500kHz, carriers rate 600bps~1Mbps, transmission range<5km, dynamic range>85dB,
Transmission error rates<10-12, receiving sensitivity<1mV, received signal to noise ratio is better than -3dB.
4. photovoltaic power station power carrier communication system according to claim 1, it is characterised in that each photovoltaic
System is provided with photovoltaic module monitor, and photovoltaic module monitor is to the weather information and the energy of photovoltaic module around photovoltaic module
Volume production goes out information and is acquired, and the information of collection is converted into corresponding data form, communication module is passed to；Communication module is received
To after information, then monitoring PC is passed data to, staff is carried out according to gained information to the working condition of photovoltaic module
Adjustment, and adjustment control information is again converted to corresponding data form, each photovoltaic module is passed to by communication module
In monitor, photovoltaic module is adjusted.
5. photovoltaic power station power carrier communication system according to claim 1, it is characterised in that the carrier wave is received
The coupled modes of the carrier signal of hair machine use Capacitance Coupled；Capacitance Coupled uses coupled capacitor device for main element, utilizes coupling
Close electric capacity to be connected the input or output end of high-frequency carrier signal with power line access point, high-frequency carrier signal is directly injected into
Power network, receives high-frequency carrier signal from power line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621346168.9U CN206323214U (en) | 2016-12-09 | 2016-12-09 | Photovoltaic power station power carrier communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621346168.9U CN206323214U (en) | 2016-12-09 | 2016-12-09 | Photovoltaic power station power carrier communication system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206323214U true CN206323214U (en) | 2017-07-11 |
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ID=59267185
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621346168.9U Expired - Fee Related CN206323214U (en) | 2016-12-09 | 2016-12-09 | Photovoltaic power station power carrier communication system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108964267A (en) * | 2018-06-29 | 2018-12-07 | 江苏集能易新能源技术有限公司 | A kind of direct voltage PLC photovoltaic switching off device circuit |
| CN109286244A (en) * | 2018-12-10 | 2019-01-29 | 国网山东省电力公司诸城市供电公司 | Photovoltaic electrification component based on carrier communication monitors system |
| WO2021057054A1 (en) * | 2019-09-29 | 2021-04-01 | 华为技术有限公司 | Interface circuit, string, and system applicable to power line communication |
| WO2024198578A1 (en) * | 2023-03-29 | 2024-10-03 | 华为数字能源技术有限公司 | Power line carrier communication system, photovoltaic controller, and subarray controller |
-
2016
- 2016-12-09 CN CN201621346168.9U patent/CN206323214U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108964267A (en) * | 2018-06-29 | 2018-12-07 | 江苏集能易新能源技术有限公司 | A kind of direct voltage PLC photovoltaic switching off device circuit |
| CN108964267B (en) * | 2018-06-29 | 2024-04-19 | 江苏集能易新能源技术有限公司 | DC voltage type PLC photovoltaic shutoff ware circuit |
| CN109286244A (en) * | 2018-12-10 | 2019-01-29 | 国网山东省电力公司诸城市供电公司 | Photovoltaic electrification component based on carrier communication monitors system |
| WO2021057054A1 (en) * | 2019-09-29 | 2021-04-01 | 华为技术有限公司 | Interface circuit, string, and system applicable to power line communication |
| US12068806B2 (en) | 2019-09-29 | 2024-08-20 | Huawei Digital Power Technologies Co., Ltd. | Interface circuit, string, and system applied to power line communication |
| WO2024198578A1 (en) * | 2023-03-29 | 2024-10-03 | 华为数字能源技术有限公司 | Power line carrier communication system, photovoltaic controller, and subarray controller |
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