CN202524413U - Network communication for solar photovoltaic power station system - Google Patents
Network communication for solar photovoltaic power station system Download PDFInfo
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- CN202524413U CN202524413U CN2012200250535U CN201220025053U CN202524413U CN 202524413 U CN202524413 U CN 202524413U CN 2012200250535 U CN2012200250535 U CN 2012200250535U CN 201220025053 U CN201220025053 U CN 201220025053U CN 202524413 U CN202524413 U CN 202524413U
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- 230000002457 bidirectional effect Effects 0.000 claims abstract description 18
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- 230000006855 networking Effects 0.000 description 12
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Abstract
The utility model relates to network communication for a solar photovoltaic power station system. The network communication comprises two or more bidirectional interface circuits between which a public grounding wire and a bidirectional signal transmitting wire are connected, and the two or more interface circuits mutually achieves signal transmission through the bidirectional signal wire. The network communication provided by the invention is substantially simple and has low device cost and stronger anti-interference ability, and misoperation caused by electromagnetic interference among the components can be avoided.
Description
Technical field
The utility model relates to the solar energy power generating field, especially a kind of network communication of using the solar photovoltaic assembly networking to build a station.
Background technology
Traditional solar photovoltaic generation system is arranged rule by many solar photovoltaic battery components according to certain assembly and is formed the solar photovoltaic assembly array and conflux through header box at the array end and form photovoltaic generating system.According to the demand of power consumption equipment, photovoltaic generating system can be divided into the direct current stand alone generating system, exchange stand alone generating system and (interchange) grid-connected system.Exchange photovoltaic generating system and must convert the direct current that every photovoltaic module produces the use of to alternating current confession AC electric equipment through inverter.Different according to conflux mode and AC/DC inversion node thereof of photovoltaic module electric current, the photovoltaic module array that is used to exchange photovoltaic generating system can be divided into photovoltaic array and concentrate inversion networking topology, photovoltaic array group string inversion networking topological sum photovoltaic array component inversion networking topology to exchange photovoltaic generation networking topology for three kinds.
Be under the natural environment photovoltaic module of work, the local shade of assembly covers, latent the splitting of assembly sensitive surface grieshoch skewness and part battery all will cause photovoltaic module power to reduce even lost efficacy.Concentrate in the structure of inversion networking topological sum group string layering inversion networking topology at array, reduction of the power of monolithic element and inefficacy can cause the significantly reduction of whole generating system power.Wherein array concentrates entire system power loss that inversion causes to reduce greater than the entire system power due to the group string layering inversion.Therefore, adopt photovoltaic plant the minimizing gradually of networking inversion unit of building a station, can effectively reduce the significantly reduction that reduces the entire system power that causes because of indivedual photovoltaic module power, facilitate the raising of electricity generation system integral body photovoltaic resource utilization.Use towards the miniature inverter of photovoltaic module and the combination of assembly; Therefore having reached minimizing of photovoltaic alternating current power-generating system inversion unit, is up to now through the most effective a kind of method of networking topology raising photovoltaic resources utilance based on the assembly inversion photovoltaic of the miniature inverter group network topological structure of building a station.
Not only facilitated effective raising of solar power station photovoltaic resources utilance based on the assembly inversion networking topology of miniature inverter; And objectively require the effective communication network of framework between photovoltaic plant master-control room and all minimum inversion units; Use and guarantee in the solar photovoltaic power plant electricity generation system, the power station master-control room is implemented real-time working condition supervision, failure diagnosis and regulation and administration thereof to miniature inverter and assembly thereof.It is this that master-control room, the intelligent communication network that covers solar photovoltaic power plant photovoltaic array and sensible photovoltaic module level should satisfy that long transmission distance, information and signal transmission reliability are high, network operation failure rate is low and the anti-interference strong and low characteristics of networking cost of environment towards the power station.
Common wireless telecommunications (WIFI) or electric line carrier communication (the PLC-Power Line Communication) mode that adopts of the miniature inverter of photovoltaic has following characteristics at present:
Wherein the complexity of the communications protocol that adopted of wireless telecommunications and electric line carrier communication mode thereof is the main reason that causes device cost higher; Do not adopting under the trunking scheme condition, the signal transmission distance of wireless telecommunications and electric line carrier communication mode thereof is shorter; The wireless communication mode antijamming capability is relatively poor, this exist under the environment of a large amount of electromagnetic interference particularly outstanding.Adopt miniature inverter to use inner embedded type inductive element in large quantities as the solar photovoltaic assembly array of parallel network reverse minimum unit; The electromagnetic interference that these inductance elements produced is carried out the rapid reduction of signal transmission reliability with directly causing based on wireless communication mode or electric line carrier communication mode.In addition, the contradiction between wireless telecommunications and the lifting of electric line carrier communication mode data effective propagation path and additional firmware equipment cost and the power consumption also is to hinder the important reason that miniature inverter is used for the large-scale ground power station.Calculate according to the land resource consumption of 1.2 square metres/100W, 10MW ground light overhead utility will consume the land resource more than 120,000 square metres, and this is a huge square formation that has 50,000 photovoltaic modulies, 350X350 square metre.Except the input of the existence of numerous electromagnetic interference sources and a large amount of signal transmission trunking equipment, the increase of attendant's human resources, signal transmission delay also is the problem that must consider.
The utility model content
The technical problem that the utility model will solve is: propose a kind of to the communication between photovoltaic plant assembly array and the power station master-control room.
The technical scheme that the utility model adopted is: a kind of solar photovoltaic assembly network communication; Comprise two or more bidirectional interface circuit; Be connected with a common ground line and a two-way signaling conveyer line between described two or more bidirectional interface circuit, carry out the transmission of signal between two or more interface circuits through bidirectional signal line.
Specifically, the binary message of the described bidirectional signal line of the utility model transmission 0 and 1, coding uses " Manchester Code ", promptly described 0 information definition be level by high step-down, described 1 information definition is that level uprises by hanging down.The height of holding wire level can be got common low voltage logic level such as 2.5V according to environment for use, and 3.3V or high voltage level are from 11V to 18V.
The described bidirectional interface circuit of the utility model is the interface circuit that CMOS bidirectional interface circuit, photoelectricity coupling circuit or any can two-way transmission signals.Described bidirectional interface circuit is respectively as control end and controlled end; Described control end is a central control room, and controlled end is photovoltaic module, have the photovoltaic module or the miniature inverter (close and be called minimum controlled cell) of miniature inverter or do not have inverter and data acquisition and communication function are only arranged.Every n minimum controlled cell (abbreviation controlled end) formed a group, and m group formed a solar power station.Described control end sends addressing, control command and control data to controlled end and accept the data that controlled end is passed back; Described controlled end is accepted instruction that control end sends or data and is changed the setting of assembly inverter or get back to control end to the service data of this assembly through same holding wire anti-pass by the requirement of instruction or data.Described signal transfer mode comprises forward pass and two kinds of passbacks, and arq mode selects position, data bit, check bit sum stop bits to form by start bit, address choice position, address bit, data before the described signal; Described signal passback pattern is made up of start bit, data bit, check digit and stop bits.
The beneficial effect of the utility model is: the communications protocol of employing is very simple, and is low based on the communication device cost of such communications protocol, and antijamming capability is more intense, can not cause misoperation because of the interference of electromagnetism between the minimum controlled cell.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
Fig. 1 is the structural representation of the utility model;
Fig. 2 is photovoltaic plant assembly array communication network figure;
Fig. 3 is a forward pass signal format sketch map;
Fig. 4 is a return path signal form sketch map;
A is to the excessive sequential chart of passback by forward pass among Fig. 5; B be passback to forward pass excessively with forward to the excessive sequential chart of forward pass.
Embodiment
Combine accompanying drawing and preferred embodiment that the utility model is done further detailed explanation now.These accompanying drawings are the sketch map of simplification, the basic structure of the utility model only is described in a schematic way, so it only show the formation relevant with the utility model.
Bidirectional interface circuit among the figure one is respectively the communication interface of control end and controlled end, and it is a CMOS bidirectional interface circuit.Control end among the figure one is in the central control room in power station, and control end is the master control person (Master) of communication bus.It sends to control end addressing information, control command and control data controlled end and accepts the data that controlled end is passed back.Controlled end (Slaver) is photovoltaic module in the photovoltaic plant array or the inverter that connects photovoltaic module.It is accepted instruction and data that control end sends and changes the setting and the operating state of assembly or inverter by the requirement of instruction, perhaps the service data of this assembly is got back to control end through same holding wire anti-pass.Figure two has provided a photovoltaic plant assembly array communication network connection layout.
The message interchange format of control end and controlled end or protocol frame are shown in figure three.One has 22.Tabulate below:
Consider solar photovoltaic power plant to as the amount of information exchange of the photovoltaic module of minimum controlled cell or inverter and little, rate request is not high yet, so the signal transfer rate can be decided to be 1MHz (T=1s).The level of holding wire is not kept a high position when having signal to transmit.The forward pass signal is sent by control end.
Setting SA is in order to carry out the control of one group of solar photovoltaic assembly easily as the address choice function of minimum controlled cell in the agreement.Often more need carry out Synchronization Control for a large-scale power station to one group of assembly.SA position in the agreement provides this function.Address bit AB7-AB0 representative is the address of one group of photovoltaic module when SA is ' 1 ', and address bit AB7-AB0 representative is the address of each assembly in this group when SA is ' 0 '.
SD in the agreement is as the selection signal of photovoltaic group network control command and control data, and data bit CD7-CD0 representative is the operational order that control end sends controlled end when SD is ' 1 '.Data bit CD7-CD0 representative is operating parameter when SD is ' 0 '.
Parity check bit is used for controlled end the signal that is received is carried out error checking.
The transmission frequency of setting signal is decided to be 1MHz (T=1us) in the agreement. also can orientate (T=2～0.2us) as according to the length of what or holding wire of network node from 500KHz～5MHz.
The signal transfer rate that adopts 1MHz in the agreement is that lead used when considering networking can adopt common lead thereby can reduce cost.If network size is bigger and hope can improve when speed of information exchange is fast signal transfer rate in the agreement.
What figure four provided is return path signal.Return path signal is sent by the minimum controlled cell as the terminal.Because the terminal is a controlled end, and minimum controlled cell mainly returns some running state information at terminal, so only need data bit (BW7-BW0).
It is signal handoff procedure sequential that figure five gives.Because be the monobus form, so must adopt time-sharing format to carry out forward pass and passback.
J among the figure five and k can decide according to the size of network and the length of line.The general requirement>to fix on 10T～25T relatively good for 10T., too big can cause the stand-by period oversize thereby reduce the speed of Communication Control.
Address bit AB7-AB0 among the figure three is based in the network every group of solar photovoltaic assembly and counts m and be no more than 256, and each solar power station group is counted n and is no more than 256 groups and fixed.The utility model also be applicable to photovoltaic module number in the solar photovoltaic power plant group network topological structure greater than 65536, promptly organize number greater than 256, every group of package count be greater than 256 situation.At this moment only need address size is increased according to the network size figure place of address.
The controlled operation instruction set that data bit CD7-CD0 among the figure three is based on assembly in the solar photovoltaic power plant is not more than 256 orders, and control data is not more than 256 groups of data and is fixed.Need the order and the required operating data of the operation of control to require digit is increased or reduces in the also visual concrete solar energy photovoltaic system of its concrete figure place.
The just embodiment of describing in the above specification of the utility model; The various fleshes and bloods that illustrate not the utility model constitute restriction; Under the those of ordinary skill of technical field after having read specification can to before described embodiment make an amendment or be out of shape, and do not deviate from the essence and the scope of utility model.
Claims (5)
1. solar photovoltaic power plant grid communication; It is characterized in that: comprise two or more bidirectional interface circuit; Be connected with a common ground line and a two-way signaling conveyer line between described two or more bidirectional interface circuit, carry out the transmission of signal between two or more interface circuits through bidirectional signal line.
2. a kind of solar photovoltaic power plant grid as claimed in claim 1 communication; It is characterized in that: having one in described two or more bidirectional interface circuit is as control end and remaining is as controlled end; Described control end is a central control room; Controlled end is photovoltaic module or links the inverter of photovoltaic module, and described control end sends addressing, control command and control data to controlled end and accept the data that controlled end is passed back; Described controlled end is accepted instruction that control end sends or data and is changed the setting of assembly inverter or get back to control end to the service data of this assembly through same holding wire anti-pass by the requirement of instruction or data.
3. a kind of solar photovoltaic power plant grid as claimed in claim 3 communication is characterized in that: the every n of described photovoltaic module assembly formed a group, and m group formed a solar power station.
4. a kind of solar photovoltaic power plant grid as claimed in claim 1 communication is characterized in that: described bidirectional interface circuit is the interface circuit that CMOS bidirectional interface circuit, photoelectricity coupling circuit or any can two-way transmission signals.
5. a kind of solar photovoltaic power plant grid as claimed in claim 1 communication is characterized in that: said photovoltaic module comprises inverter or does not comprise inverter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200250535U CN202524413U (en) | 2012-01-19 | 2012-01-19 | Network communication for solar photovoltaic power station system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200250535U CN202524413U (en) | 2012-01-19 | 2012-01-19 | Network communication for solar photovoltaic power station system |
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| CN202524413U true CN202524413U (en) | 2012-11-07 |
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| CN2012200250535U Expired - Lifetime CN202524413U (en) | 2012-01-19 | 2012-01-19 | Network communication for solar photovoltaic power station system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112368587A (en) * | 2018-12-06 | 2021-02-12 | Ansys Lumerical知识产权有限责任公司 | System and method for creating a single-port interface for simulating bi-directional signals in a circuit using available circuit simulation standards |
-
2012
- 2012-01-19 CN CN2012200250535U patent/CN202524413U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112368587A (en) * | 2018-12-06 | 2021-02-12 | Ansys Lumerical知识产权有限责任公司 | System and method for creating a single-port interface for simulating bi-directional signals in a circuit using available circuit simulation standards |
| CN112368587B (en) * | 2018-12-06 | 2023-10-24 | Ansys 公司 | System and method for creating a single port interface for simulating a bi-directional signal in a circuit using available circuit simulation standards |
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| C14 | Grant of patent or utility model | ||
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200103 Address after: 215100 unit 15, floor 13, building 21, No. 388, Xinping street, industrial park, Wuzhong District, Suzhou City, Jiangsu Province Patentee after: Suzhou Hongxin integrated circuit Co., Ltd Address before: Shin Ku New Park Co-patentee before: Du Yinghong Patentee before: Wang Shenghong |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121107 |