CN108900401A - Communication system and its method based on 1MW photovoltaic converter - Google Patents
Communication system and its method based on 1MW photovoltaic converter Download PDFInfo
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- CN108900401A CN108900401A CN201810767697.3A CN201810767697A CN108900401A CN 108900401 A CN108900401 A CN 108900401A CN 201810767697 A CN201810767697 A CN 201810767697A CN 108900401 A CN108900401 A CN 108900401A
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- 238000004891 communication Methods 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title description 5
- 230000003993 interaction Effects 0.000 claims description 7
- 230000002159 abnormal effect Effects 0.000 claims description 4
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000011161 development Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 239000002674 ointment Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40006—Architecture of a communication node
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- H02J3/383—
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- H02J3/385—
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40208—Bus networks characterized by the use of a particular bus standard
- H04L2012/40215—Controller Area Network CAN
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Small-Scale Networks (AREA)
Abstract
The invention discloses a kind of communication systems based on 1MW photovoltaic converter, including photovoltaic converter and MPPT header box, the photovoltaic converter connects multiple MPPT header boxs by CAN bus, CanOpen protocol stack has been respectively embedded into the digital signal processor of photovoltaic converter controller and MPPT header box controller, photovoltaic converter controller is CanOpen main website, and MPPT header box controller is CanOpen slave station.Of the invention has excellent real-time and stability, different application can be directed to, especially in the photovoltaic generating system of regional, regional and strong customization smart micro-grid system, real-time control is carried out to the power of each solar energy collector unit MPPT header box of collecting and distributing type photovoltaic generating system, there is very big advantage to the real-time acquisition of the operating current voltage data of MPPT header box, so that photovoltaic converter and MPPT header box are enable to respond quickly control command and reflect working condition in time, the generating efficiency of photovoltaic generating system is improved.
Description
Technical field
The present invention relates to the technical fields of high-power collecting and distributing type photovoltaic generating system, and in particular to one kind is based on 1MW photovoltaic
The communication system and its method of current transformer.
Background technique
With the development of society, the development of new energy industry is like a raging fire, photovoltaic generating system is even more outstanding person therein
One of.And the more centralized photovoltaic generating system of collecting and distributing type photovoltaic generating system, 3% power generation effect under equal conditions can be improved
Rate and by imperial favor, mainly have benefited from the multi-way intelligence MPPT of collecting and distributing type photovoltaic generating system（Maximum Power Point
Tracking, MPPT maximum power point tracking）Header box relatively independent can carry out energy to photovoltaic group string connected to it
Amount acquisition, is then aggregated on photovoltaic DC-to-AC converter and generates electricity by way of merging two or more grid systems.
Collecting and distributing type photovoltaic generating system is mostly the capacity of 1MW at present, generally with 10 mating compositions of MPPT header box.However
Instantly the communication between photovoltaic generating system current transformer and MPPT intelligent junction box is established on RS485 field bus system more,
Its communication speed is usually no more than 10Kbps, and in order to ensure normal communication, is merely able to transmit few data between the two
Amount, or relatively large number of data transmission is realized by the prolonged Refresh Data period, it is unable to satisfy the real-time of data
Property.
Summary of the invention
The present invention in order to solve the above technical problems, and provide a kind of communication system based on 1MW photovoltaic converter and
Its method.
The present invention is realized according to following technical scheme：
Communication system based on 1MW photovoltaic converter of the invention, including photovoltaic converter and MPPT header box, the photovoltaic
Current transformer connects multiple MPPT header boxs, the number of photovoltaic converter controller and MPPT header box controller by CAN bus
CanOpen protocol stack is respectively embedded into signal processor, photovoltaic converter controller is CanOpen main website, MPPT header box
Controller is CanOpen slave station.
Using the topological structure of formula hand in hand between the CAN bus and multiple MPPT header boxs.
Communication distance between the CanOpen main website and CanOpen slave station is 0-400 meters, and communication speed is
125Kbps, communication cycle 100ms.
Communication distance between the CanOpen main website and CanOpen slave station is greater than 400 meters, CanOpen main website with
CanBridge repeater, communication speed 125Kbps, communication cycle 100ms are set between CanOpen slave station.
The means of communication based on 1MW photovoltaic converter of the invention, specific step is as follows：
Step 1, after communication system powers on, CanOpen main website and CanOpen slave station enter prerun state；
Step 2, CanOpen main website and CanOpen slave station carry out the initialization of data point table；
Step 3, CanOpen main website and CanOpen slave station are into operation state；
Step 4, CanOpen main website monitor CanOpen slave station working condition, if working condition is normal, CanOpen main website and
CanOpen slave station carries out data interaction, communication system work, and CanOpen main website continues to monitor CanOpen slave station working condition,
If working condition is abnormal, CanOpen main website reports error condition, the CanOpen slave station of closing fault；
Step 5, CanOpen main website and CanOpen slave station complete data interaction, and communication system power-off terminates.
In the step two, after CanOpen main website carries out the initialization of data point table, to CanOpen slave station data point table
It is initialized.
In the step three, after CanOpen main website enters operating status, management CanOpen slave station enters operating status.
The invention has the advantages and positive effects that：
Of the invention has excellent real-time and stability, different application can be directed to, especially in regional, region
The photovoltaic generating system of property and the strong smart micro-grid system of customization, to each solar energy energy of collecting and distributing type photovoltaic generating system
The power for measuring collector unit MPPT header box carries out real-time control, adopts to the real-time of operating current voltage data of MPPT header box
Collection has very big advantage, the real-time, interactive that data are carried out between photovoltaic converter and MPPT header box is realized, so that light
Volt current transformer and MPPT header box are enable to respond quickly control command and reflect working condition in time, improve photovoltaic generating system
Generating efficiency.
Detailed description of the invention
Fig. 1 is the topological diagram of communication system of the present invention；
Fig. 2 is the flow chart of communication system of the present invention.
Specific embodiment
The present invention will be described in detail with reference to the accompanying drawings and embodiments.
As shown in Figure 1, the communication system of the invention based on 1MW photovoltaic converter, including photovoltaic converter and MPPT converge
Case is flowed, the photovoltaic converter connects multiple MPPT header boxs, photovoltaic converter controller and MPPT confluence by CAN bus
CanOpen protocol stack is respectively embedded into the digital signal processor of case controller, photovoltaic converter controller is CanOpen master
It stands, MPPT header box controller is CanOpen slave station.
Using the topological structure of formula hand in hand between the CAN bus and multiple MPPT header boxs.
Communication distance between the CanOpen main website and CanOpen slave station is 0-400 meters, and communication speed is
125Kbps, communication cycle 100ms.
Communication distance between the CanOpen main website and CanOpen slave station is greater than 400 meters, CanOpen main website with
CanBridge repeater, communication speed 125Kbps, communication cycle 100ms are set between CanOpen slave station.
As shown in Fig. 2, the means of communication of the invention based on 1MW photovoltaic converter, specific step is as follows：
Step 1, after communication system powers on, CanOpen main website and CanOpen slave station enter prerun state；
Step 2, CanOpen main website and CanOpen slave station carry out the initialization of data point table；
Step 3, CanOpen main website and CanOpen slave station enter operating status；
Step 4, CanOpen main website monitor CanOpen slave station working condition, if working condition is normal, CanOpen main website and
CanOpen slave station carries out data interaction, communication system work, and CanOpen main website continues to monitor CanOpen slave station working condition,
If working condition is abnormal, CanOpen main website reports error condition, the CanOpen slave station of closing fault；
Step 5, CanOpen main website and CanOpen slave station complete data interaction, and communication system power-off terminates.
In the step two, after CanOpen main website carries out the initialization of data point table, to CanOpen slave station data point table
It is initialized.
In the step three, after CanOpen main website enters operating status, management CanOpen slave station enters operating status.
Communication system of the invention is established in CAN bus, is arbitrarily no more than 128 by the access of hand-in-hand connection type
A CanOpen slave node, while the physical communication distance to meet the communication speed of 125Kbps, between each CanOpen slave station
It is arranged within 400m, when CanOpen slave station physical communication distance exceeds 400m range, is accessed in CAN bus
CanBridge repeater, amplifies communication signal, and the acknowledgement mechanism of Can bus protocol will further improve CAN bus band
Wide utilization rate realizes the real-time, interactive of data between photovoltaic converter and MPPT header box.Simultaneously in the physics of CAN bus
Link layer increases CanOpen master-Slave Protocol stack so that communication system CanOpen main website, that is, photovoltaic converter and more CanOpen from
The communication cycle stood between i.e. multiple MPPT header boxs is within 100ms, the multinode management function and biography of CanOpen protocol stack
The easy configuration management of the information of transmission of data makes communication between CanOpen master-salve station become versatile and flexible, has extraordinary open up
Malleability.
The present invention uses the controller that CanOpen protocol stack is embedded into the photovoltaic converter as core and MPPT to converge
In the DSP digital signal processor of case controller, wherein the CanOpen main website of photovoltaic converter has management MPPT header box
CanOpen slave station function, all communication datas can carry out issuing configuration by CanOpen main website, can real-time monitoring it is each
The working condition of a CanOpen slave node.When the work of some CanOpen slave station is abnormal, it will at once that error message is anti-
It feeds CanOpen main website, CanOpen main website is arranged according to relevant control, carries out corresponding actions to error node.
Communication system of the present invention realizes photovoltaic unsteady flow by the link networking of CAN bottom physical communication, in CanOpen protocol layer
Communication between device and MPPT header box, and by means of the data-handling capacity of DSP fast powerful, so that 1MW photovoltaic unsteady flow
The CanOpen communication system of device has the high real-time of big data throughout and communication information, stability, realizes entire light
The coordinated control of photovoltaic generating system.
The advantage of the invention is that realize the real-time of photovoltaic converter and the data interaction of MPPT header box, accuracy,
And diversity, the stability of data type, the possibility for further increasing power generation efficiency is provided for more accurately real-time control
Property.Simultaneously the characteristics of the data information management of its flexible more piece point topological structure and each node, it can be answered in the exploitation of new product
With the middle shortening development cycle, human resources investment is reduced, further decreases development cost.
The embodiments of the present invention have been described in detail above, but content is only the preferred embodiment of the present invention,
It should not be considered as limiting the scope of the invention.Any changes and modifications in accordance with the scope of the present application,
It should still be within the scope of the patent of the present invention.
Claims (7)
1. a kind of communication system based on 1MW photovoltaic converter, including photovoltaic converter and MPPT header box, it is characterised in that：
The photovoltaic converter connects multiple MPPT header boxs, photovoltaic converter controller and MPPT header box control by CAN bus
CanOpen protocol stack has been respectively embedded into the digital signal processor of device processed, photovoltaic converter controller is CanOpen main website,
MPPT header box controller is CanOpen slave station.
2. the communication system according to claim 1 based on 1MW photovoltaic converter, it is characterised in that：The CAN bus
Using the topological structure of formula hand in hand between multiple MPPT header boxs.
3. the communication system according to claim 1 based on 1MW photovoltaic converter, it is characterised in that：The CanOpen
Communication distance between main website and CanOpen slave station is 0-400 meters, communication speed 125Kbps, communication cycle 100ms.
4. the communication system according to claim 1 based on 1MW photovoltaic converter, it is characterised in that：The CanOpen
Communication distance between main website and CanOpen slave station is greater than 400 meters, is arranged between CanOpen main website and CanOpen slave station
CanBridge repeater, communication speed 125Kbps, communication cycle 100ms.
5. a kind of means of communication based on 1MW photovoltaic converter, it is characterised in that：Specific step is as follows：
Step 1, after communication system powers on, CanOpen main website and CanOpen slave station enter prerun state；
Step 2, CanOpen main website and CanOpen slave station carry out the initialization of data point table；
Step 3, CanOpen main website and CanOpen slave station enter operating status；
Step 4, CanOpen main website monitor CanOpen slave station working condition, if working condition is normal, CanOpen main website and
CanOpen slave station carries out data interaction, communication system work, and CanOpen main website continues to monitor CanOpen slave station working condition,
If working condition is abnormal, CanOpen main website reports error condition, the CanOpen slave station of closing fault；
Step 5, CanOpen main website and CanOpen slave station complete data interaction, and communication system power-off terminates.
6. the means of communication according to claim 5 based on 1MW photovoltaic converter, it is characterised in that：The step two
In, after CanOpen main website carries out the initialization of data point table, CanOpen slave station data point table is initialized.
7. the means of communication according to claim 5 based on 1MW photovoltaic converter, it is characterised in that：The step three
In, after CanOpen main website enters operating status, management CanOpen slave station enters operating status.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810767697.3A CN108900401A (en) | 2018-07-13 | 2018-07-13 | Communication system and its method based on 1MW photovoltaic converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810767697.3A CN108900401A (en) | 2018-07-13 | 2018-07-13 | Communication system and its method based on 1MW photovoltaic converter |
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| Publication Number | Publication Date |
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| CN108900401A true CN108900401A (en) | 2018-11-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810767697.3A Pending CN108900401A (en) | 2018-07-13 | 2018-07-13 | Communication system and its method based on 1MW photovoltaic converter |
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Citations (7)
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|---|---|---|---|---|
| CN201771675U (en) * | 2010-08-26 | 2011-03-23 | 哈尔滨九洲电气股份有限公司 | Double feed wind energy converter CAN open communication unit |
| US20110096579A1 (en) * | 2009-10-26 | 2011-04-28 | General Electric Company | Dc bus voltage control for two stage solar converter |
| CN202042502U (en) * | 2011-05-19 | 2011-11-16 | 北京景新电气技术开发有限责任公司 | Header box and photovoltaic power generation system applying same |
| CN102969749A (en) * | 2011-08-29 | 2013-03-13 | 三星Sdi株式会社 | Cell balancing method, cell balancing device, and energy storage system including the cell balancing device |
| CN103199560A (en) * | 2013-03-18 | 2013-07-10 | 西安交通大学 | A box-type integrated multi-micro-source interface micro-grid grid-connected system device |
| CN204407917U (en) * | 2015-03-13 | 2015-06-17 | 北京天诚同创电气有限公司 | The control system of multimode photovoltaic combining inverter |
| CN104753083A (en) * | 2015-03-13 | 2015-07-01 | 北京天诚同创电气有限公司 | Control system of multi-module photovoltaic grid-connected inverter |
-
2018
- 2018-07-13 CN CN201810767697.3A patent/CN108900401A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110096579A1 (en) * | 2009-10-26 | 2011-04-28 | General Electric Company | Dc bus voltage control for two stage solar converter |
| CN201771675U (en) * | 2010-08-26 | 2011-03-23 | 哈尔滨九洲电气股份有限公司 | Double feed wind energy converter CAN open communication unit |
| CN202042502U (en) * | 2011-05-19 | 2011-11-16 | 北京景新电气技术开发有限责任公司 | Header box and photovoltaic power generation system applying same |
| CN102969749A (en) * | 2011-08-29 | 2013-03-13 | 三星Sdi株式会社 | Cell balancing method, cell balancing device, and energy storage system including the cell balancing device |
| CN103199560A (en) * | 2013-03-18 | 2013-07-10 | 西安交通大学 | A box-type integrated multi-micro-source interface micro-grid grid-connected system device |
| CN204407917U (en) * | 2015-03-13 | 2015-06-17 | 北京天诚同创电气有限公司 | The control system of multimode photovoltaic combining inverter |
| CN104753083A (en) * | 2015-03-13 | 2015-07-01 | 北京天诚同创电气有限公司 | Control system of multi-module photovoltaic grid-connected inverter |
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Application publication date: 20181127 |