CN105897306A - Composite communication system and composite communication mode of micro inverter based on PLC/ZigBee (Power Line Carrier/ZigBee) - Google Patents
Composite communication system and composite communication mode of micro inverter based on PLC/ZigBee (Power Line Carrier/ZigBee) Download PDFInfo
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- CN105897306A CN105897306A CN201610335277.9A CN201610335277A CN105897306A CN 105897306 A CN105897306 A CN 105897306A CN 201610335277 A CN201610335277 A CN 201610335277A CN 105897306 A CN105897306 A CN 105897306A
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- 238000004891 communication Methods 0.000 title claims abstract description 154
- 239000002131 composite material Substances 0.000 title claims abstract description 18
- 238000012544 monitoring process Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims description 12
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- 230000007547 defect Effects 0.000 abstract 1
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- 230000008878 coupling Effects 0.000 description 6
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- 230000006855 networking Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
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- 230000015556 catabolic process Effects 0.000 description 2
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- 238000011161 development Methods 0.000 description 1
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- 238000002955 isolation Methods 0.000 description 1
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- 230000001360 synchronised effect Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit 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
- H02J13/00006—Circuit 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 characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00007—Circuit 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 characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using the power network as support for the transmission
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- H02J13/0075—
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
-
- 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
- Y04S40/00—Systems 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
- Y04S40/12—Systems 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
- Y04S40/121—Systems 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 the power network as support for the transmission
-
- 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
- Y04S40/00—Systems 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
- Y04S40/12—Systems 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
- Y04S40/126—Systems 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 wireless data transmission
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Abstract
The invention discloses a composite communication system and a composite communication mode of a micro inverter based on PLC/ZigBee (Power Line Carrier/ZigBee). The composite communication system comprises an upper computer, a concentrator and n micro inversion units; any ith micro inversion unit in the n micro inversion units comprises a micro inverter, a wireless communication ZigBee module and a PLC module; and a PLC communication layer is mainly utilized to carry out communication, ZigBee wireless communication is used as a monitoring layer to take charge of monitoring communication data of a PLC, and if a large difference exists between the communication data of the PLC and the ZigBee wireless communication, communication of the PLC must be cut off and simultaneously, the ZigBee wireless communication takes over PLC communication. The composite communication system and the composite communication mode which are disclosed by the invention can overcome the defects and shortcomings brought by a single communication mode of a conventional micro inverter, and guarantee the micro inverter to normally work in real time, so that working efficiency, stability, reliability and an error-tolerant rate of the system can be improved.
Description
Technical field
The present invention relates to the communication technology of a kind of Miniature inverter, a kind of Miniature inverter based on PLC/ZigBee
Combined communications system and composite communication mode thereof.
Background technology
In the last few years, along with the high speed development of society, efficiency and the safety of the energy were increasingly paid attention to by people, and renewable
Energy photovoltaic grid-connected inversion technology is increasingly becoming the focus of research.Miniature solar photovoltaic inverter can utilize well can be again
Raw energy solar energy, transfers electric energy to solar energy.This technology needs the direct current that photovoltaic panel is produced by DC-DC DC voltage booster circuit
Voltage Vpv (28V～44V) raises (reaching as high as 400V).Among these in order to improve the utilization ratio of solar energy, have employed MPPT (
High-power point is followed the tracks of) technology.This is accomplished by the input voltage Vpv and input current Ipv of Real-time Collection Miniature inverter.And boost
After again through DC-AC single-phase full bridge inverter circuit, DC power conversion is become alternating current 220V.Alternating current 220V is being incorporated to electricity
During net, it is ensured that the electric voltage frequency of the inversion output of Miniature inverter keeps consistent with phase place and bulk power grid.And the adopting of these data
Collection and communication need to ensure real-time and reliability.
The communication mode of current photovoltaic Miniature inverter is more single, is typically all and uses wire communication method electric lines of force
Carrier wave plc communication, or wireless communications method ZigBee technology.What power line carrier PLC utilized is that existing electric lines of force leads to
Letter, the problem eliminating wire communication architecture network again, as long as live wire, data just can be transmitted, cost-effective, and make
With convenient, plug and play, connect with the mains and just connect to the Net.But there is unstable problem, household electric in power line communication PLC
The electromagnetic wave that device produces produces interference to communication, some unpredictable mistakes can occur often, and have problem of signal attenuation,
This is it is possible to make Miniature inverter cause inefficiency even to damage miniature inversion due to communication delay or communication mistake
Device, and then cause Miniature inverter to work.
And radio communication ZigBee technology volume is little, performance is strong, and environment-adapting ability is strong, is suitable for working out of doors, real-time Communication for Power
Efficiency is high, good stability.But single ZigBee technology lacks reliability, ZigBee module great majority use lithium battery power supply,
This makes to need timing to change battery, is therefore not suitable for ZigBee and works long hours at communications status, on the other hand ZigBee signal
The ability penetrating barrier poor, be easily subject to blocking of the barriers such as wall.And in order to improve data transmission can
By property, it is necessary to ensure by increasing routing node, and then add cost.
The Zhang Linglan etc. of TI company describes integrated power line carrier communication function (PLC) photovoltaic inverting system based on C2000.Logical
Cross and be connected with power line carrier PLC module by means of communication such as SPI/SCI in Miniature inverter system, and utilize existing
Power line network, as communication media, can be transferred to external network the data of Miniature inverter system, it is achieved remotely monitoring and
Management.But, there is drawback in this single communication technology, lacks the highest reliability and real-time, once power line carrier
PLC module breaks down or damages, and communication is just interrupted, and causes the paralysis of Miniature inverter, just cannot normally work.
The Xue Jiaxiang of South China Science & Engineering University etc. describe monitoring system (the south China reason of a kind of micro-inverter based on radio sensing network
Work university paper, 2014, " monitoring system of micro-inverter based on radio sensing network ").By ZigBee wireless communication
Some signals of the module Miniature inverter to gathering are received and dispatched, and monitor miniature in real time by hand-held mobile terminal display device
The data of inverter, coordinate host computer to realize Intellectualized monitoring and control.But this technology does not has good reliability, once
ZigBee wireless network communication module has damage or existence communication mistake to this may result in whole Miniature inverter systemic breakdown and even damage
Bad.
Summary of the invention
The present invention is for avoiding the weak point existing for above-mentioned prior art, it is provided that a kind of miniature inversion based on PLC/ZigBee
The combined communications system of device and composite communication mode thereof, bring not to solving the single communication mode of tradition Miniature inverter
Foot and shortcoming, it is ensured that the real-time normal work of Miniature inverter, thus improve the efficiency of system, stability and reliability.
For solving above-mentioned problem, the technical solution used in the present invention is:
The feature of the combined communications system of a kind of Miniature inverter based on PLC/ZigBee of the present invention be include a host computer, one
Individual concentrator and n micro-inverse unit；Described n the micro-inverse unit of micro-inverse any i-th of unit includes: i-th Miniature inverter,
I-th power line carrier PLC module, i-th radio communication ZigBee module；
Described i-th Miniature inverter is supported on electric lines of force respectively with i-th power line carrier PLC module respectively；
Described host computer is communicated with n i-th Miniature inverter respectively by n radio communication ZigBee module；
Described i-th Miniature inverter is communicated with i-th power line carrier PLC module by SPI, and by serial ports and the
I radio communication ZigBee module communicates；
Described concentrator is communicated with described host computer by netting twine, and is entered with n i-th Miniature inverter by electric lines of force
Row communication；Using described concentrator as host node device, using described n power line carrier PLC module as from node device；
Described it is divided into m group from node device according to the ascending order of the distance size with described concentrator；1st group is passed through electric lines of force and institute
State concentrator directly to communicate；After jth group is transferred to the 1st group successively by front j group respectively and described concentrator carry out between connect
Letter；
The Monitoring Data transmitted when described i-th radio communication ZigBee module is transmitted with i-th power line carrier PLC module
Communication data consistent time, described host computer utilizes i-th power line carrier PLC module to communicate with i-th Miniature inverter；
Otherwise host computer utilizes i-th radio communication ZigBee module to communicate with i-th Miniature inverter.
The feature of the composite communication method of a kind of Miniature inverter based on PLC/ZigBee of the present invention be applied to by one upper
In the combined communications system that the individual micro-inverse unit of machine, a concentrator and n is formed；Described n micro-inverse any i-th of unit is micro-
Inverse unit includes: i-th Miniature inverter, i-th radio communication ZigBee module, i-th power line carrier PLC module；
Described composite communication method is to carry out as follows:
Step 1, described n power line carrier PLC module is divided into m group according to the ascending order of the distance size with described concentrator；
1st group is closest group, and m group is apart from farthest group；Jth group includes SjIndividual power line carrier PLC module；
1≤j≤m；
Step 2, the 1st group directly communicated with described concentrator by electric lines of force；Jth group is transmitted successively by front j group respectively
Indirect communication is carried out with described concentrator after the 1st group；
The communication data that step 3, described host computer are transmitted according to described i-th power line carrier PLC module, it is judged that i-th
Miniature inverter the most normally works, if normally, then performs step 4；Otherwise, host computer reports an error i-th Miniature inverter；
Step 4, described host computer receive the Monitoring Data transmitted of described i-th radio communication ZigBee module, and respectively with
The communication data that corresponding i-th power line carrier PLC module is transmitted compares, if both data consistents, then described
Host computer utilizes i-th power line carrier PLC module to communicate with i-th Miniature inverter；Otherwise, described host computer disconnects
With the communication of i-th power line carrier PLC module, and according to importance, communication data is divided, then utilize i-th without
Line communication ZigBee module communicates with i-th Miniature inverter.
The feature of composite communication method of the present invention lies also in, and the importance of described step 4 is divided into:
The DC bus-bar voltage of Miniature inverter and electric current > input direct voltage of Miniature inverter and electric current > Miniature inverter
Prime boosting PWM duty cycle > Miniature inverter ac output voltage and electric current > Miniature inverter rear class inversion PWM duty cycle >
The frequency of electrical network > Miniature inverter temperature.
Compared with prior art, the beneficial effects of the present invention is:
1, the present invention is by the combined communications system of the PLC/ZigBee of the Miniature inverter of structure and answering of employing PLC/Zigbee
Hop communication mode, it is ensured that Miniature inverter will cause this micro-because of the mistake of certain power line carrier plc communication generation
Type inverter is paralysed, and improves the stability of Miniature inverter system, reliability and real-time and serious forgiveness.
2, the present invention is by power line carrier PLC used, by existing electric lines of force, it is not necessary to build network again, reduce into
This, carry out high-speed transfer by carrier communication mode, it is ensured that the real-time of information and reliability.
3, the present invention is by the ZigBee communication used, and owing to the volume of ZigBee is little, accommodative ability of environment is strong,
Improve the information reliability when transmission.
4, the present invention is by using primary and secondary structure and the frame mode of packet of power line carrier PLC, solves power line carrier
The problem that communication range is short, it is possible to expand communication range, thus increase the number of Miniature inverter unit in whole system, improves
The efficiency remotely controlled of power line carrier PLC and reliability.
5, the present invention classifies by the data of Miniature inverter are pressed importance, the data that prioritised transmission importance is high, it is ensured that
The Miniature inverter normal work when PLC disconnects, improves the work efficiency of whole system.
Accompanying drawing explanation
Fig. 1 is combined communications system structure chart of the present invention；
Fig. 2 is power line carrier plc communication structure chart of the present invention；
Fig. 3 is power line carrier plc communication fundamental diagram of the present invention；
Fig. 4 is present system communication monitoring flow chart.
Detailed description of the invention
In the present embodiment, the combined communications system of a kind of Miniature inverter based on PLC/ZigBee, as shown in Figure 1: include one
Individual host computer, a concentrator and n micro-inverse unit；N the micro-inverse unit of micro-inverse any i-th of unit includes: i-th is miniature
Inverter, i-th radio communication ZigBee module, i-th power line carrier PLC module.
I-th Miniature inverter is supported on electric lines of force respectively with i-th power line carrier PLC module respectively；I-th is miniature inverse
Become device to be communicated with i-th power line carrier PLC module by SPI.Power line carrier PLC module mainly includes concentrator,
It is used for managing multiple power line carrier PLC terminal node and as leading between host computer and power line carrier PLC terminal node
Letter bridge.
Concentrator is communicated with host computer by netting twine, and is communicated with n Miniature inverter by electric lines of force.To concentrate
Device is as host node device, using n power line carrier PLC module as from node device.
It is divided into m group according to the ascending order of the distance size with concentrator from node device；1st group is carried out with concentrator by electric lines of force
Directly communication；Jth group carries out indirect communication with concentrator after being transferred to the 1st group successively by front j group respectively.
In power line carrier group-net communication, concentrator, with AFE031 carrier chip as core, contains carrier wave and sends, carrier wave
Receive and linear coupling three partial circuit.When concentrator is started working, Power Line Carrier Communication Module is just by concentrator place one
All terminal nodes one complete communication network of composition in the range of Ding.It is sent to electric lines of force load when concentrator receives host computer
During the order of ripple PLC terminal node, power line carrier plc communication module is just by being instructed, and is forwarded by transtation mission circuit
To the power line carrier PLC terminal node on electric lines of force；When power line carrier PLC terminal node needs to send information to host computer
Time, power line carrier plc communication module is received information by receiving circuit, and is sent to host computer by serial ports.At carrier information
Will be modulated demodulating to information through linear coupling circuit when sending and receive.When the information of transmission, linear coupling circuit handle
High frequency carrier information is sent into electric lines of force and is transmitted；When the information of reception, coupling circuit extracts high-frequency information and then solution from electric lines of force
Adjusting, coupling circuit stops 50Hz power frequency component in electric lines of force to flow into simultaneously, plays the effect of isolation.
Host computer is communicated with n i-th Miniature inverter respectively by n radio communication ZigBee module；ZigBee without
Line communication module mainly includes ZigBee radio frequency chip CC2530 and wireless transceiver circuit, and by serial ports and i-th radio communication
ZigBee module communicates.
The Monitoring Data transmitted when i-th radio communication ZigBee module and i-th power line carrier PLC module are transmitted
When communication data is consistent, host computer utilizes i-th power line carrier PLC module to communicate with i-th Miniature inverter；Otherwise
Host computer utilizes i-th radio communication ZigBee module to communicate with i-th Miniature inverter.The conduct of radio communication ZigBee
The supervisory layers of whole Miniature inverter, the data of power line carrier plc communication are observed by main being responsible for.At certain electric lines of force
When the communication of carrier wave PLC makes a mistake, it is possible to find the concrete of mistake by the unique address very first time of each Miniature inverter
Position is also overhauled, simultaneously the ZigBee radio communication of co-located take over the most at this moment this power line carrier PLC made a mistake lead to
Letter module.
In the present embodiment, a kind of composite communication method of Miniature inverter based on PLC/ZigBee, be applied to by one upper
In the combined communications system that the individual micro-inverse unit of machine, a concentrator and n is formed；N the micro-inverse unit of micro-inverse any i-th of unit
Including: i-th Miniature inverter, i-th radio communication ZigBee module, i-th power line carrier PLC module；Miniature inverse
Voltage on Miniature inverter and on electrical network, electric current, frequency and phase place are acquired also by the sample detecting circuit become in device module
Conditioning, and the data gathered are stored in the dsp chip of master controller, dsp chip is passed to, by SPI, the data gathered
Power line carrier PLC module, power line carrier PLC is sent data extremely by electric lines of force after ovennodulation receiving data again
Concentrator, the circuit that receives in concentrator module is demodulated the high-frequency signal on electric lines of force and is sent to host computer.In like manner,
When host computer sends commands to inverter, it is necessary to the transtation mission circuit of concentrator is modulated into high-frequency signal signal and passes through electric power again
PLC module passed to by line, and then passes to the master controller dsp chip of Miniature inverter module.Workflow diagram is as shown in Figure 4.
Specifically, as shown in Figure 4, composite communication method is to carry out as follows:
Step 1 in order to expand power line carrier PLC communication range, by n power line carrier PLC module according to
The ascending order of the distance size of concentrator is divided into m group；1st group is closest group, and m group is apart from farthest group；Each
Group jth group includes SjIndividual power line carrier PLC module；1≤j≤m；
Step 2, the 1st group directly communicated with concentrator by electric lines of force；Jth group is transferred to the successively by front j group respectively
Indirect communication is carried out with concentrator after 1 group.As shown in Figure 2: this is a primary and secondary structure, and concentrator is as plc communication
One host node, is whole power line carrier plc communication network-based control center, is responsible for all power line carriers PLC eventually
End node.When the scope of whole power line carrier plc communication network is little, all power line carrier PLC terminals in Fig. 2
The status of node is all identical (C group does not has any difference for A group, B group), all power line carrier PLC terminal nodes and collection
Middle device is all directly communication.But the communication distance of power line carrier PLC is limited.Such as Fig. 2, the most all of electric power
Line carrier wave PLC terminal node can be divided into A group (PLC node 1～node L), B group (PLC node by the how far of distance concentrator
L+1～node M), C group (PLC node M+1～node N), and more group, the PLC nodes of each group is the most identical.
Wherein A group distance concentrator is nearest, and C group is farthest.Due to the restriction of power line carrier plc communication distance, concentrator is merely able to
Directly communicate with all power line carrier PLC terminal nodes in A group, and can not and any one electric power of B, C two groups
Line carrier wave PLC terminal node directly communicates, so being now accomplished by power line carrier PLC terminal node is carried out classification.A
The terminal node of group, just as the first communication stage, can directly carry out data communication, and B group is just as the second communication with concentrator
Level needs to carry out data communication with concentrator by the first communication stage, and C group just needs profit as third communication level by that analogy
Could carry out data communication with concentrator with the first and second two communication stages, namely the PLC terminal node of C group is just and B group
PLC terminal node communicate, then the terminal node of B group communicates with the PLC terminal node of A group, last with collection
Middle device communication, so A, the terminal node of B group regards via node, it is achieved C group and the data communication of concentrator.Concrete
Power line carrier plc communication principle is as shown in Figure 3: the data that concentrator (host node) sends need to send through data communication interface
To the signal processing module of transtation mission circuit, the microprocessor in transtation mission circuit receives needs data to be sent, and to the number sent
According to processing, encoded, after modulation, it is sent on electric lines of force by power line coupling circuit.Receive circuit and pass through electric power
Line coupled interface circuit receives the modulated signal that sends over, and after obtained the data message of transmission by demodulation, is sent to micro-place
Reason device is analyzed processing, then passes to from node communication equipment.In like manner, (main to concentrator also with similar method from node
Node) transmission data.
The communication data that step 3, host computer are transmitted according to i-th power line carrier PLC module, it is judged that the miniature inversion of i-th
Device the most normally works, if normally, then performs step 4；Otherwise, host computer reports an error i-th Miniature inverter, notifies that user examines
Look into, fix a breakdown；
Step 4, host computer receive the Monitoring Data that i-th radio communication ZigBee module is transmitted, and respectively with corresponding
The communication data that i-th power line carrier PLC module is transmitted compares, if both data consistents, then host computer utilizes i-th
Individual power line carrier PLC module communicates with i-th Miniature inverter；Otherwise, host computer disconnects and i-th power line carrier
The communication of PLC module, and communication data being divided according to importance, then utilize i-th radio communication ZigBee module with
I-th Miniature inverter communicates, and i.e. i-th radio communication ZigBee module is now as i-th Miniature inverter system
Communication Layer.
In being embodied as, radio communication ZigBee module needs building network, and step is as follows: the first step, netinit and joint
Point initializes, and scanning channel also checks whether network exists；Second step, host node configuration network, produce coordinator network node,
It is initially configured network；3rd step, networks from node, and terminal node application adds coordinator node or routing node.Each inversion
Device module be connected with ZigBee module composition one RFD device node, this device node add network detailed process as follows:
Whether RFD device node is after the hardware initialization that powers on, through time delay, exist and can add in the range of searching for its node communication
Network, if having, then this device node is according to the current all of network information, selects a host node and sends a networking simultaneously
Request, then wait the request response of host node, host node is after receiving networking request, and determines whether according to solicited message
RFD device node, if host node allows to add, then the request that sends responds to RFD device node, and RFD device node is accepting
After the networking request response that host node sends, host node will be obtained and distribute to its network address as this RFD equipment
Node unique identifier in a network, the most then this RFD equipment has been successfully joined network；If host node does not allow this RFD to set
Slave node adds or RFD device node does not find the network that can add, then continue search for after waiting time delay, until finding
Till the network that can add addition.After ZigBee networking completes, both can start communication, dsp chip is the information gathered
Passed to the terminal node of ZigBee by serial ports, the terminal node of ZigBee is sent out the data with Self address by radio frequency chip
Giving ZigBee host node, ZigBee host node is sending data to host computer.In like manner, host computer sends commands to miniature inverse
When becoming device, if having only to send certain Miniature inverter order, then host node passes through the point-to-point transmission in address information, if desired
All of Miniature inverter sends order, then host node sends information with the form of broadcast.In network, any node can connect
Receive the order that host node sends.
When i-th Miniature inverter utilizes i-th radio communication ZigBee module to communicate, need according to importance logical
Letter data divides, and divides as follows by the height descending of importance: the DC bus-bar voltage of Miniature inverter and electric current > miniature
The input direct voltage of inverter and electric current > the prime boosting PWM duty cycle of Miniature inverter > exchange output electric for Miniature inverter
Pressure and electric current > Miniature inverter rear class inversion PWM duty cycle > frequency of electrical network > Miniature inverter temperature etc..Miniature inverter
DC bus-bar voltage and electric current, as the middle bridge of level before and after Miniature inverter work, are connected to DC-DC Yu DC-AC two
Parallel circuit, is the main condition that normally works of whole Miniature inverter, and certain importance is also the highest；Miniature inverter defeated
Enter DC voltage and electric current is the key data of preceding stage DC-DC booster circuit, be also MPPT (MPPT maximum power point tracking) skill
Two data necessary to art；The prime boosting PWM duty cycle of Miniature inverter, this data relationship prime switching tube
ON time and the conversion efficiency of prime and the loss of switching tube；Miniature inverter ac output voltage and electric current, be whole micro-
Type inverter rear class can the premise of steady operation, these data are also used for judging mistake (owing) voltage protection of Miniature inverter；
Miniature inverter rear class inversion PWM duty cycle, this data relationship the ON time of rear class switching tube and the conversion of rear class
Efficiency, the loss of switching tube；The frequency of electrical network can make the output voltage of Miniature inverter and frequency and synchronized；Miniature inverse
The temperature becoming device can understand the operating temperature situation of reflection Miniature inverter in time.
Claims (3)
1. a combined communications system for Miniature inverter based on PLC/ZigBee, it is characterized in that including a host computer, one
Concentrator and n micro-inverse unit；The micro-inverse unit of the micro-inverse any i-th of unit of described n includes: i-th Miniature inverter, the
I power line carrier PLC module, i-th radio communication ZigBee module；
Described i-th Miniature inverter is supported on electric lines of force respectively with i-th power line carrier PLC module respectively；
Described host computer is communicated with n i-th Miniature inverter respectively by n radio communication ZigBee module；
Described i-th Miniature inverter is communicated with i-th power line carrier PLC module by SPI, and by serial ports and the
I radio communication ZigBee module communicates；
Described concentrator is communicated with described host computer by netting twine, and is entered with n i-th Miniature inverter by electric lines of force
Row communication；Using described concentrator as host node device, using described n power line carrier PLC module as from node device；
Described it is divided into m group from node device according to the ascending order of the distance size with described concentrator；1st group is passed through electric lines of force and institute
State concentrator directly to communicate；After jth group is transferred to the 1st group successively by front j group respectively and described concentrator carry out between connect
Letter；
The Monitoring Data transmitted when described i-th radio communication ZigBee module is transmitted with i-th power line carrier PLC module
Communication data consistent time, described host computer utilizes i-th power line carrier PLC module to communicate with i-th Miniature inverter；
Otherwise host computer utilizes i-th radio communication ZigBee module to communicate with i-th Miniature inverter.
2. a composite communication method for Miniature inverter based on PLC/ZigBee, it is characterized in that being applied to by a host computer,
In the combined communications system that one concentrator and the individual micro-inverse unit of n are formed；Described n micro-inverse any i-th of unit is micro-inverse single
Unit includes: i-th Miniature inverter, i-th radio communication ZigBee module, i-th power line carrier PLC module；Described
Composite communication method is to carry out as follows:
Step 1, described n power line carrier PLC module is divided into m group according to the ascending order of the distance size with described concentrator；
1st group is closest group, and m group is apart from farthest group；Jth group includes SjIndividual power line carrier PLC module；
1≤j≤m；
Step 2, the 1st group directly communicated with described concentrator by electric lines of force；Jth group is transmitted successively by front j group respectively
Indirect communication is carried out with described concentrator after the 1st group；
The communication data that step 3, described host computer are transmitted according to described i-th power line carrier PLC module, it is judged that i-th
Miniature inverter the most normally works, if normally, then performs step 4；Otherwise, host computer reports an error i-th Miniature inverter；
Step 4, described host computer receive the Monitoring Data transmitted of described i-th radio communication ZigBee module, and respectively with
The communication data that corresponding i-th power line carrier PLC module is transmitted compares, if both data consistents, then described
Host computer utilizes i-th power line carrier PLC module to communicate with i-th Miniature inverter；Otherwise, described host computer disconnects
With the communication of i-th power line carrier PLC module, and according to importance, communication data is divided, then utilize i-th without
Line communication ZigBee module communicates with i-th Miniature inverter.
Composite communication method the most according to claim 2, is characterized in that: the importance of described step 4 is divided into:
The DC bus-bar voltage of Miniature inverter and electric current > input direct voltage of Miniature inverter and electric current > Miniature inverter
Prime boosting PWM duty cycle > Miniature inverter ac output voltage and electric current > Miniature inverter rear class inversion PWM duty cycle >
The frequency of electrical network > Miniature inverter temperature.
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