CN107682756A - Distribution terminal communication system based on LoRa - Google Patents

Distribution terminal communication system based on LoRa Download PDF

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Publication number
CN107682756A
CN107682756A CN201711076022.6A CN201711076022A CN107682756A CN 107682756 A CN107682756 A CN 107682756A CN 201711076022 A CN201711076022 A CN 201711076022A CN 107682756 A CN107682756 A CN 107682756A
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China
Prior art keywords
data
unit
module
sine wave
lora
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Pending
Application number
CN201711076022.6A
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Chinese (zh)
Inventor
梁朔
韦劼
李珊
李春华
高立克
卢辰旭
吴剑豪
万翔
周杨珺
欧世锋
梁捷
陈绍南
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Electric Power Research Institute of Guangxi Power Grid Co Ltd
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Electric Power Research Institute of Guangxi Power Grid Co Ltd
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Application filed by Electric Power Research Institute of Guangxi Power Grid Co Ltd filed Critical Electric Power Research Institute of Guangxi Power Grid Co Ltd
Priority to CN201711076022.6A priority Critical patent/CN107682756A/en
Publication of CN107682756A publication Critical patent/CN107682756A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q9/00Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
    • GPHYSICS
    • G08SIGNALLING
    • G08CTRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C17/00Arrangements for transmitting signals characterised by the use of a wireless electrical link
    • G08C17/02Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/0006Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network for single frequency AC networks
    • H02J13/0013Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network for single frequency AC networks characterised by transmission structure between the control or monitoring unit and the controlled or monitored unit
    • H02J13/0079Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network for single frequency AC networks characterised by transmission structure between the control or monitoring unit and the controlled or monitored unit with transmission using an intermediate treatment level between the control or monitoring unit and the controlled or monitored unit
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q2209/00Arrangements in telecontrol or telemetry systems
    • H04Q2209/40Arrangements in telecontrol or telemetry systems using a wireless architecture
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q2209/00Arrangements in telecontrol or telemetry systems
    • H04Q2209/80Arrangements in the sub-station, i.e. sensing device
    • H04Q2209/84Measuring functions
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02B90/20Smart grids as enabling technology in buildings sector
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/70Reducing energy consumption in communication networks in wireless communication networks
    • YGENERAL 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
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS 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
    • Y04S40/00Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/124Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses

Abstract

The invention discloses a kind of distribution terminal communication system based on LoRa,It is related to power distribution network communication technique field,Used for existing power distribution network in wireless telecommunications and transmit power consumption,Transmission rate,Transmitted data amount and transmission range, which are unable to good match and majority, to be needed to rely on infrastructure and provide communication and support to cause the high technical problem of construction cost,Using including data acquisition device,Data concentrator,The webserver and monitor terminal,The data acquisition device is wirelessly connected with data concentrator,The data concentrator is connected by network with the webserver,The technical scheme that the webserver is connected with monitor terminal solves problem,The present invention is using based on the exclusive low energy consumption of LoRa technologies,Long transmission distance,The features such as being supported without base station,By from solar energy,Wind energy,Voltage transformer and site inspection equipment obtain the energy and adjust automatically mode of operation is to adapt to energy consumption,So as to long-term,Efficiently ensure the connection of power distribution network communication.

Description

Distribution terminal communication system based on LoRa
Technical field
The present invention relates to power distribution network communication technique field, more particularly to a kind of distribution terminal communication system based on LoRa.
Background technology
Power distribution automation is the concept of the western developed country proposition seventies, has been obtained fully in Japan, America and Europe at present Development.The country there has also been many trials, but be concentrated mainly on city.Power distribution automation is by power distribution network in normal and accident conditions Under monitoring, protection, control, metering and the work management of power supply department be organically merged, improve power supply quality, with More closely more responsible relation is established at family, and the diversity of user's requirement is met with reasonable prices, it is best to make every effort to power supply economics.
At present, most of distribution automation systems can also play monitoring distribution network operation shape in power distribution network normal operation Condition and remote control change the effect of the method for operation, can discover in time during failure, still, the power distribution automation of power system at present is main Also it is to rely on public network to take remote measurement the uplink of data, in remote suburb, because the network of public network is poor, even without public affairs Net signal, the telemetry of such power distribution automation cannot upload to main website, and this is that distribution power automation terminal is in unsupervised shape State, even if the job information of distribution line cannot be understood.
For no public network or the place of public network signal difference, solution typically has three kinds, be respectively wireless self-networking, Microwave station, optical fiber.In power scheduling field, because the requirement of real-time, reliability, security is high, generally using microwave station and Optical fiber, but both modes belong to the high cost of high investment.In distribution automation field, real-time, reliability, security will Ask relatively lower, the node of power distribution automation is very more, very sensitive to cost, therefore wireless communication mode is received and generally should With.
The mode of wireless hoc network has WIFI, bluetooth, GPRS, 3G, 4G at present, and WIFI transmission rates are high, but transmission distance From short, power consumption height;Still transmission range is very short for the more high and low power consumption of bluetooth transmission speed;GPRS coverages greatly but need according to Rely infrastructure construction;3G, 4G transmission rate are high, but are also relied on infrastructure construction and need intensive base station to support.
The wireless technology of composition LAN mainly has 2.4GHz WiFi, bluetooth, Zigbee etc., forms the wireless of wide area network Technology mainly has 2G/3G/4G etc..These wireless technologys, advantage and disadvantage clearly, in low-power consumption wide area network(Low Power Wide Area Network, LPWAN)Before generation, it appears that remote and low-power consumption between the two can only alternative;Work as use After LPWAN technologies, designer can accomplish both to take into account, and farthest realize more long haul communication and more low-power consumption, It can also save extra repeater cost simultaneously.
LoRa is one kind in the LPWAN communication technologys, is that one kind that Semtech companies of the U.S. use and promoted is based on spread spectrum The overlength distance wireless transmission scheme of technology.This scheme changes the compromise consideration side on transmission range and power consumption in the past Formula, provide the user it is a kind of it is simple can realize at a distance, the system of long battery life, Large Copacity, and then extension sensing network. At present, LoRa is mainly run in global free frequency range, including 433,868,915 MHz etc..LoRa technologies have remote, low work( Consumption(Battery life is grown), multinode, the characteristic of low cost.
The content of the invention
The present invention provides a kind of distribution terminal communication system based on LoRa, and channel radio is used to solve existing power distribution network Power consumption, transmission rate, transmitted data amount and transmission range are transmitted in news and is unable to good match and most needs dependence bases Facility, which provides communication support, causes the high technical problem of construction cost.
To solve the above problems, the present invention adopts the following technical scheme that realization:
A kind of distribution terminal communication system based on LoRa, including data acquisition device, data concentrator, the webserver and prison Control terminal, the data acquisition device are wirelessly connected with data concentrator, the data concentrator by network with The webserver is connected, and the webserver is connected with monitor terminal;
The data acquisition device comprises at least 1;
The data acquisition device includes LoRa terminal main control modules, parameter input control module, data acquisition interface module, taken Electric module, data transmit-receive module, LoRa terminal main control modules first interface are connected with the parameter input control module, LoRa Terminal main control module second interface is connected with the data acquisition interface module, the interface of LoRa terminal main control modules the 3rd and institute Electricity-fetching module connection is stated, the interface of LoRa terminal main control modules the 4th is connected with data transmit-receive module;
The LoRa terminal main control modules include microcomputer controller, LoRa wireless transmission units, the LoRa terminals master control mould Block is used to receive the information that the data acquisition interface module transmission comes and is processed, and is then sent by data transmit-receive module To data concentrator;
The parameter input control module includes push-button unit, display unit, and parameter input control module is used for the LoRa Terminal main control module inputs control instruction;
The data acquisition interface module is used to be connected with the various detection means at scene and obtains detection data;
The data transmit-receive module includes transmitting antenna, for giving data to the data concentrator by radio wave transmission;
The electricity-fetching module includes mutual inductor unit, lightning protection isolation filter unit, the first rectification stable pressuring unit, passage switching list Member, solar cell panel unit, the second rectification unit, wind-driven generator unit, lightning protection unit and rectifying and wave-filtering voltage regulation unit, The mutual inductor unit is connected with lightning protection isolation filter unit end of incoming cables, and lightning protection isolation filter unit leading-out terminal and the first rectification are steady The connection of unit end of incoming cables is pressed, the first rectification stable pressuring unit leading-out terminal is connected with passage switch unit second interface;The solar energy Battery Slab element is connected with the second rectification unit end of incoming cables, and the second rectification unit leading-out terminal connects with the interface of passage switch unit the 3rd Connect;Wind-driven generator unit is connected with lightning protection unit end of incoming cables, lightning protection unit leading-out terminal and rectifying and wave-filtering voltage regulation unit end of incoming cables Connection, rectifying and wave-filtering voltage regulation unit leading-out terminal are connected with the interface of passage switch unit the 4th;Passage switch unit first connect with The interface of LoRa terminal main control modules the 3rd;
The passage switch unit includes peak-to-peak value detection unit, IGBT conduction pipes, for detecting and switching and LoRa terminal masters Control the electric power loop of module connection.
Preferably, the wireless mode is LoRa wireless transmission methods.
Preferably, the network is Ethernet or 3G, 4G network.
Preferably, the data acquisition interface module is transmitted using 485 agreements.
Preferably, the mutual inductor unit is made up of at least one voltage transformer, for being obtained from detected circuit Electric energy is simultaneously supplied to data acquisition device;
The lightning protection isolation filter unit includes lightning protection device, filter capacitor, and lightning protection isolation filter unit is sent for mutual inductor unit The electricity come carries out lightning protection and filtering process;
Preferably, solar cell panel unit is mainly made up of solar panel.
Preferably, the data concentrator includes data transmit-receive module, is sent for receiving the data acquisition device Data and data are sent to the webserver by network.
Preferably, the data acquisition device before data to be transmitted to the data concentrator by signal through ovennodulation Well, the step of modulation includes:
One S1, production variable frequency sine-wave;
S2, the code check parameter according to parameter input module, the transformation range of sine wave is set;
S3, the frequency of sine wave are depending on the data of input:When data are 1, sine wave changes from low frequency toward high-frequency, number During according to being 0, sine wave is from high-frequency toward low frequency change;Or
When data are 0, sine wave changes from low frequency toward high-frequency, and when data are 1, sine wave becomes from high-frequency toward low frequency Change;Or
When data are 1, the frequency of sine wave first uprises step-down again, and when data are 0, the frequency elder generation step-down of sine wave uprises again;Or Person,
When data are 0, the frequency of sine wave first uprises step-down again, and when data are 1, the frequency elder generation step-down of sine wave uprises again; Or when data are 1, sine wave freuqency is converted in the range of the setting of maximum, and when data are 0, sine wave is set in maximum Put the half conversion of scope;Or
When data are 0, sine wave freuqency converts in the range of the setting of maximum, and when data are 1, sine wave sets scope in maximum Half conversion.
Further, the step S2 sets the transformation range bag of sine wave according to the code check parameter of parameter input module Include:
When Rate Control is arranged to 125KHz, the transformation range of sine wave is exactly 125KHz;
When Rate Control is arranged to 250KHz, the transformation range of sine wave is exactly 250KHz;
When Rate Control is arranged to 500KHz, the transformation range of sine wave is exactly 500KHz.
The present invention is led to using the features such as being supported based on the exclusive low energy consumption of LoRa technologies, transmission range member without base station Cross and obtain the energy and adjust automatically mode of operation from solar energy, wind energy, voltage transformer and site inspection equipment to adapt to energy Consumption, so as to long-term, the efficient connection for ensureing power distribution network communication.
Brief description of the drawings
Fig. 1 is embodiment general structure block diagram provided by the invention;
Fig. 2 is data acquisition device structured flowchart in embodiment provided by the invention;
Fig. 3 is the structured flowchart of electricity-fetching module in embodiment provided by the invention.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the figure in the embodiment of the present invention 1-3, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is the present invention Part of the embodiment, rather than whole embodiments.The embodiments of the invention being generally described and illustrated herein in the accompanying drawings The scope for being not intended to limit claimed invention is described in detail, but is merely representative of the selected embodiment of the present invention.Base Embodiment in the present invention, those of ordinary skill in the art obtained under the premise of creative work is not made it is all its His embodiment, belongs to the scope of protection of the invention.
Fig. 1 is embodiment general structure block diagram provided by the invention, and Fig. 2 is data acquisition in embodiment provided by the invention Apparatus structure block diagram, Fig. 3 are the structured flowcharts of electricity-fetching module in embodiment provided by the invention, and as Figure 1-3, one kind is based on LoRa distribution terminal communication system, including data acquisition device, data concentrator, the webserver and monitor terminal, data Harvester is connected by LoRa wireless transmission methods with data concentrator, and data concentrator passes through Ethernet or 3G, 4G network It is connected with the webserver, the webserver is connected with monitor terminal;
Data acquisition device comprise at least 1, the present embodiment use 4, respectively with for gathering overhead transmission line three-phase current, electricity The device connection of pressure;
Data acquisition device includes LoRa terminal main control modules, parameter input control module, data acquisition interface module, power taking mould Block, data transmit-receive module, LoRa terminal main control modules first interface are connected with parameter input control module, LoRa terminal master controls Module second interface is connected with data acquisition interface module, and the interface of LoRa terminal main control modules the 3rd is connected with electricity-fetching module, The interface of LoRa terminal main control modules the 4th is connected with data transmit-receive module;
LoRa terminal main control modules include microcomputer controller, LoRa wireless transmission units, and LoRa terminal main control modules are used to connect Receive the information that the transmission of data acquisition interface module comes and be processed, be then sent to by data transmit-receive module in data set Device;
Parameter input control module includes push-button unit, display unit, and parameter input control module is used for LoRa terminal master controls Module inputs control instruction;
Data acquisition interface module is transmitted using 485 agreements, and including but not limited to FTU, RTU, TTU agreement connect, for showing The various detection means of field connect and obtain detection data,;
Data transmit-receive module includes transmitting antenna, for by data by radio wave transmission to data concentrator;
Electricity-fetching module includes mutual inductor unit, lightning protection isolation filter unit, the first rectification stable pressuring unit, passage switch unit, too Positive energy battery Slab element, the second rectification unit, wind-driven generator unit, lightning protection unit and rectifying and wave-filtering voltage regulation unit, mutual inductance Device unit is connected with lightning protection isolation filter unit end of incoming cables, and lightning protection isolation filter unit leading-out terminal enters with the first rectification stable pressuring unit Line end is connected, and the first rectification stable pressuring unit leading-out terminal is connected with passage switch unit second interface;Solar cell panel unit with Second rectification unit end of incoming cables is connected, and the second rectification unit leading-out terminal is connected with the interface of passage switch unit the 3rd;Wind power generation Machine unit is connected with lightning protection unit end of incoming cables, and lightning protection unit leading-out terminal is connected with rectifying and wave-filtering voltage regulation unit end of incoming cables, rectification filter Ripple voltage regulation unit leading-out terminal is connected with the interface of passage switch unit the 4th;Passage switch unit first connects and LoRa terminal master control moulds The interface of block the 3rd;
Passage switch unit includes peak-to-peak value detection unit, IGBT conduction pipes, for detecting and switching and LoRa terminal master control moulds The electric power loop of block connection;
Wherein,
Mutual inductor unit is made up of at least one voltage transformer, for obtaining electric energy from detected circuit and being supplied to data Harvester;
Lightning protection isolation filter unit includes lightning protection device, filter capacitor, and lightning protection isolation filter unit is used for what mutual inductor unit was sent Electricity carries out lightning protection and filtering process;
Solar cell panel unit is mainly made up of solar panel;
Data concentrator includes data transmit-receive module, for receiving data that data acquisition device sends and data being passed through into net Network is sent to the webserver.
Middle control module for power supply is given in the electricity-fetching module mainly power taking from circuit, has three kinds of power taking patterns inside electricity getting device, One is from data acquisition interface module power taking, second, from voltage transformer and solar cell power taking, the 3rd is from wind-force Generator power taking.When circuit does not set up voltage transformer or is inconvenient to install voltage transformer, electricity-fetching module is just from too Positive energy battery or wind-driven generator power taking.If meet continuous prolonged rainy weather or solar panel damage, Just from wind-driven generator or data acquisition interface module power taking, while current power taking mode signal is sent to main control module, At this time because the power of power taking is smaller, main control module is worked with low-power consumption mode, reduces primary processor internal bus clock frequency Rate, intermittence are turned on and off the peripheral hardware that main control module internal processor seldom works, and increase communication time interval, set Lora Terminal main control module reduces signal transmission power, while increases the proportion of redundant code, so as to ensure that system is realizing basic function In the case of, power consumption is no more than the supply capacity of current power taking pattern.When there is voltage transformer outside, electricity-fetching module is used From voltage transformer power taking, at this time the power supply capacity to master control mould electricity is stronger, and main control module can use peak performance pattern work Make, the information progress of circuit acquisition interface is more dense, faster upload.
Electricity-fetching module is under voltage transformer work to take power situation, by voltage transformer, lightning protection isolation filter module, whole Voltage stabilizing module composition is flowed, electricity-fetching module is turned under data acquisition interface work to take power situation by peak-to-peak value detection unit, IGBT Pipe, automatic threshold setting module, rectifying and voltage-stabilizing module composition.Wherein peak-to-peak value detection unit is used to detect circuit acquisition interface electricity Voltage crest peak value, automatic threshold setup module set a threshold value automatically according to the size of peak-to-peak value, when more than this threshold value, hair Go out drive signal control IGBT pipe conductings, the electric flux of such data acquisition interface can flow out, and enter arrangement stable-pressure device Electric energy is exported to main control module.Dependent on peak-to-peak value detection module and automatic threshold control module so that only in data acquisition Power taking operation is just carried out when the voltage of interface is higher than the logic voltage that main control module can identify, so as to be counted when power taking According to acquisition interface and the normal work of main control module.
In order to ensure data transfer efficiently and accurately, data acquisition device will before data to be transmitted to data concentrator It is as follows to modulate method used by modulating for signal:1st, the sine wave of a frequency is produced;2nd, according to parameter input module Code check parameter, the transformation range of sine wave is set, as Rate Control is arranged to 125KHz, then the transformation range of sine wave is exactly 125KHz, as Rate Control is arranged to 250KHz, then the transformation range of sine wave is exactly 250KHz, as Rate Control is arranged to 500KHz, then the transformation range of sine wave is exactly 500KHz;3rd, the frequency changing rule of sine wave according to input data difference And different, including but not limited to once transform method:When data are 1, sine wave changes from low frequency toward high-frequency, works as data When being 0, sine wave is from high-frequency toward low frequency change;Or when data are 0, sine wave changes from low frequency toward high-frequency, When data are 1, sine wave is from high-frequency toward low frequency change;Or when data are 1, the frequency of sine wave, which first uprises, to be become Low, when data are 0, the frequency elder generation step-down of sine wave is uprising;Or when data are 0, the frequency of sine wave first uprises Step-down, when data are 1, the frequency elder generation step-down of sine wave is uprising;Or when data are 1, sine wave freuqency is in maximum Converted in the range of setting, when data are 0, sine wave is in the maximum half conversion for setting scope;Or when data are 0, just String wave frequency rate converts in the range of the setting of maximum, and when data are 1, sine wave is in the maximum half conversion for setting scope.
The present invention is led to using the features such as being supported based on the exclusive low energy consumption of LoRa technologies, transmission range member without base station Cross and obtain the energy and adjust automatically mode of operation from solar energy, wind energy, voltage transformer and site inspection equipment to adapt to energy Consumption, so as to long-term, the efficient connection for ensureing power distribution network communication.

Claims (9)

1. the distribution terminal communication system based on LoRa, it is characterised in that:
Including data acquisition device, data concentrator, the webserver and monitor terminal, the data acquisition device passes through wireless Mode is connected with data concentrator, and the data concentrator is connected by network with the webserver, the webserver with Monitor terminal connects;
The data acquisition device comprises at least 1;
The data acquisition device includes LoRa terminal main control modules, parameter input control module, data acquisition interface module, taken Electric module, data transmit-receive module, LoRa terminal main control modules first interface are connected with the parameter input control module, LoRa Terminal main control module second interface is connected with the data acquisition interface module, the interface of LoRa terminal main control modules the 3rd and institute Electricity-fetching module connection is stated, the interface of LoRa terminal main control modules the 4th is connected with data transmit-receive module;
The LoRa terminal main control modules include microcomputer controller, LoRa wireless transmission units, the LoRa terminals master control mould Block is used to receive the information that the data acquisition interface module transmission comes and is processed, and is then sent by data transmit-receive module To data concentrator;
The parameter input control module includes push-button unit, display unit, and parameter input control module is used for the LoRa Terminal main control module inputs control instruction;
The data acquisition interface module is used to be connected with the various detection means at scene and obtains detection data;
The data transmit-receive module includes transmitting antenna, for giving data to the data concentrator by radio wave transmission;
The electricity-fetching module includes mutual inductor unit, lightning protection isolation filter unit, the first rectification stable pressuring unit, passage switching list Member, solar cell panel unit, the second rectification unit, wind-driven generator unit, lightning protection unit and rectifying and wave-filtering voltage regulation unit, The mutual inductor unit is connected with lightning protection isolation filter unit end of incoming cables, and lightning protection isolation filter unit leading-out terminal and the first rectification are steady The connection of unit end of incoming cables is pressed, the first rectification stable pressuring unit leading-out terminal is connected with passage switch unit second interface;The solar energy Battery Slab element is connected with the second rectification unit end of incoming cables, and the second rectification unit leading-out terminal connects with the interface of passage switch unit the 3rd Connect;Wind-driven generator unit is connected with lightning protection unit end of incoming cables, lightning protection unit leading-out terminal and rectifying and wave-filtering voltage regulation unit end of incoming cables Connection, rectifying and wave-filtering voltage regulation unit leading-out terminal are connected with the interface of passage switch unit the 4th;Passage switch unit first connect with The interface of LoRa terminal main control modules the 3rd;
The passage switch unit includes peak-to-peak value detection unit, IGBT conduction pipes, for detecting and switching and LoRa terminal masters Control the electric power loop of module connection.
2. distribution terminal communication system according to claim 1, it is characterised in that:
The wireless mode is LoRa wireless transmission methods.
3. distribution terminal communication system according to claim 1, it is characterised in that:
The network is Ethernet or 3G, 4G network.
4. distribution terminal communication system according to claim 1, it is characterised in that:
The data acquisition interface module is transmitted using 485 agreements.
5. distribution terminal communication system according to claim 1, it is characterised in that:
The mutual inductor unit is made up of at least one voltage transformer, for obtaining electric energy from detected circuit and being supplied to Data acquisition device;
The lightning protection isolation filter unit includes lightning protection device, filter capacitor, and lightning protection isolation filter unit is sent for mutual inductor unit The electricity come carries out lightning protection and filtering process.
6. distribution terminal communication system according to claim 1, it is characterised in that:
Solar cell panel unit is mainly made up of solar panel.
7. distribution terminal communication system according to claim 1, it is characterised in that:
The data concentrator includes data transmit-receive module, for receiving data that the data acquisition device sends and by number The webserver is sent to according to by network.
8. distribution terminal communication system according to claim 7, it is characterised in that:
The data acquisition device before data to be transmitted to the data concentrator by signal by modulating, the step of modulation Including:
One S1, production variable frequency sine-wave;
S2, the code check parameter according to parameter input module, the transformation range of sine wave is set;
S3, the frequency of sine wave are depending on the data of input:When data are 1, sine wave changes from low frequency toward high-frequency, number During according to being 0, sine wave is from high-frequency toward low frequency change;Or
When data are 0, sine wave changes from low frequency toward high-frequency, and when data are 1, sine wave becomes from high-frequency toward low frequency Change;Or
When data are 1, the frequency of sine wave first uprises step-down again, and when data are 0, the frequency elder generation step-down of sine wave uprises again;Or Person,
When data are 0, the frequency of sine wave first uprises step-down again, and when data are 1, the frequency elder generation step-down of sine wave uprises again; Or when data are 1, sine wave freuqency is converted in the range of the setting of maximum, and when data are 0, sine wave is set in maximum Put the half conversion of scope;Or
When data are 0, sine wave freuqency converts in the range of the setting of maximum, and when data are 1, sine wave sets scope in maximum Half conversion.
9. distribution terminal communication system according to claim 8, it is characterised in that:
According to the code check parameter of parameter input module, set the transformation range of sine wave includes the step S2:
When Rate Control is arranged to 125KHz, the transformation range of sine wave is exactly 125KHz;
When Rate Control is arranged to 250KHz, the transformation range of sine wave is exactly 250KHz;
When Rate Control is arranged to 500KHz, the transformation range of sine wave is exactly 500KHz.
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109066988A (en) * 2018-09-04 2018-12-21 国家电网有限公司 A kind of end power network topology level power-off event preferentially recognizes reporting system and method
CN109714745A (en) * 2019-03-13 2019-05-03 清华四川能源互联网研究院 Transmission line of electricity monitoring data Transmission system
CN110007636A (en) * 2019-05-14 2019-07-12 张轩宁 A kind of internet-of-things terminal based on power grid acquires equipment in real time
CN110572791A (en) * 2019-09-02 2019-12-13 关祥 Information transmission system based on LoRa technology
CN111243256A (en) * 2020-03-24 2020-06-05 河南省中原智能电气科技有限公司 Communication transmission module for low-voltage power distribution monitoring system
CN113014895A (en) * 2021-05-25 2021-06-22 广东信通通信有限公司 Ad hoc network video system and ad hoc network video system control method

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109066988A (en) * 2018-09-04 2018-12-21 国家电网有限公司 A kind of end power network topology level power-off event preferentially recognizes reporting system and method
CN109714745A (en) * 2019-03-13 2019-05-03 清华四川能源互联网研究院 Transmission line of electricity monitoring data Transmission system
CN109714745B (en) * 2019-03-13 2022-03-01 清华四川能源互联网研究院 Transmission line monitoring data transmission system
CN110007636A (en) * 2019-05-14 2019-07-12 张轩宁 A kind of internet-of-things terminal based on power grid acquires equipment in real time
CN110572791A (en) * 2019-09-02 2019-12-13 关祥 Information transmission system based on LoRa technology
CN111243256A (en) * 2020-03-24 2020-06-05 河南省中原智能电气科技有限公司 Communication transmission module for low-voltage power distribution monitoring system
CN113014895A (en) * 2021-05-25 2021-06-22 广东信通通信有限公司 Ad hoc network video system and ad hoc network video system control method

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