CN109787292A - A kind of multimode and the central controlled photovoltaic inverter system of machine and control method - Google Patents
A kind of multimode and the central controlled photovoltaic inverter system of machine and control method Download PDFInfo
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- CN109787292A CN109787292A CN201910239239.7A CN201910239239A CN109787292A CN 109787292 A CN109787292 A CN 109787292A CN 201910239239 A CN201910239239 A CN 201910239239A CN 109787292 A CN109787292 A CN 109787292A
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- 239000012141 concentrate Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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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
-
- 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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/12—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
- Y04S10/123—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation the energy generation units being or involving renewable energy sources
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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
- Y04S40/124—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 wired telecommunication networks or data transmission busses
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Abstract
The invention discloses a kind of multimode and the central controlled photovoltaic inverter system of machine and control method, which includes system board and N number of photovoltaic DC-to-AC converter module for being connected respectively with the system board by CAN bus, and N is the natural number more than or equal to 2；Wherein, the DC side parallel of each photovoltaic DC-to-AC converter module is connected to the input terminal of system, and the exchange side of each photovoltaic DC-to-AC converter module is connected in parallel the output end as system.A kind of multimode provided by the invention and the central controlled photovoltaic inverter system of machine and control method, the independent flexible control to each photovoltaic DC-to-AC converter module is realized by using the strong system board of fault-resistant ability, not only there is no coupled relation between each photovoltaic DC-to-AC converter module, it is independent of each other, it is reliable and stable, and structure is simple, at low cost, there is good application and popularization value.
Description
Technical field
The present embodiments relate to photovoltaic DC-to-AC converter technical field more particularly to a kind of multimode and the central controlled light of machine
Lie prostrate inverter system and control method.
Background technique
In photovoltaic inverter system, in order to form more powerful system often will by the way of multiple module paralleling,
And these inverter modules share one group of photovoltaic display, this requires that can only have a power maximum point tracking control system,
It there is a need for being able to the switching on and shutting down for reasonably controlling modules simultaneously, and rationally comprehensive to modules distribution power needs one
Close the system centre of management.
Usual way be a module is selected in all modules as host, and other modules be used as from
Machine, that is, the mode of our commonly referred master & slave controls.Host be responsible for other modules switching on and shutting down and power control and
The maximal power tracing of photovoltaic module, slave are specified according to the electric current of host come output power.Due to the module sheet as host
Body is a power module, comparatively there is the probability of higher failure, damage, once host module has been damaged, it will cause all
Module shutdown, influence other normal power generations, the serious generated energy for affecting photovoltaic plant of this coupled relation.
Summary of the invention
The present invention provides a kind of multimode and the central controlled photovoltaic inverter system of machine and control method, existing to solve
The deficiency of technology.
To achieve the above object, the present invention provides technical solution below:
In a first aspect, the embodiment of the present invention provides a kind of multimode and the central controlled photovoltaic inverter system of machine, including
System board and the N number of photovoltaic DC-to-AC converter module being connected respectively with the system board by CAN bus, N are oneself more than or equal to 2
So number；Wherein,
The DC side parallel of each photovoltaic DC-to-AC converter module is connected to the input terminal of system, and each photovoltaic is inverse
The exchange side for becoming device module is connected in parallel the output end as system.
Further, in the multimode and the central controlled photovoltaic inverter system of machine, the baud rate of the CAN bus
It is set as 10Mbps, every 1 millisecond of the photovoltaic DC-to-AC converter module is reported once currently by the CAN bus to the system board
Work state information.
Further, in the multimode and the central controlled photovoltaic inverter system of machine, the photovoltaic DC-to-AC converter module
DC side be photovoltaic solar panel generate variable dc side.
Second aspect, the embodiment of the present invention provide a kind of centralized control method of photovoltaic inverter system, and the present invention is any
Multimode provided by embodiment and the central controlled photovoltaic inverter system execution of machine, which comprises
The system board is independently controlled each photovoltaic DC-to-AC converter module, is referred to switching on and shutting down according to operation reserve
It enables or electric current apportioning cost by the CAN bus is sent to each photovoltaic DC-to-AC converter module；
Each photovoltaic DC-to-AC converter module is instructed according to the switching on and shutting down carries out switching on and shutting down operation or according to the electric current
Apportioning cost works.
A kind of multimode provided in an embodiment of the present invention and the central controlled photovoltaic inverter system of machine and control method are led to
The independent flexible control using the strong system board realization of fault-resistant ability to each photovoltaic DC-to-AC converter module is crossed, not only each photovoltaic
There is no coupled relation between inverter module, is independent of each other, it is reliable and stable, and structure is simple, at low cost, has good application to push away
Wide value.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other attached drawings according to these attached drawings.
Fig. 1 is the structure of a kind of multimode that the embodiment of the present invention one provides and the central controlled photovoltaic inverter system of machine
Schematic diagram；
Fig. 2 is the control block diagram that photovoltaic DC-to-AC converter uses in the embodiment of the present invention one；
Fig. 3 is a kind of process signal of the centralized control method of photovoltaic inverter system provided by Embodiment 2 of the present invention
Figure.
Appended drawing reference:
System board 10, photovoltaic DC-to-AC converter module 20.
Specific embodiment
To enable the purpose of the present invention, feature, advantage more obvious and understandable, implement below in conjunction with the present invention
Attached drawing in example, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that reality disclosed below
Applying example is only a part of the embodiment of the present invention, and not all embodiment.Based on the embodiments of the present invention, this field is common
Technical staff's all other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
In the description of the present invention, it is to be understood that, when a component is considered as " connection " another component, it can
To be directly to another component or may be simultaneously present the component being centrally located.When a component is considered as " setting
Set " another component, it, which can be, is set up directly on another component or may be simultaneously present the component being centrally located.
In addition, the indicating positions such as term " length " " short " "inner" "outside" or positional relationship for the orientation that is shown based on attached drawing or
Person's positional relationship is merely for convenience of the description present invention, rather than the device or original part of indication or suggestion meaning must have this
Specific orientation is operated with specific orientation construction, should not be understood as limitation of the invention with this.
To further illustrate the technical scheme of the present invention below with reference to the accompanying drawings and specific embodiments.
Embodiment one
The tracking of photovoltaic power maximum point is placed on a system board by the embodiment of the present invention, since system board is not too big
Power, it is only necessary to voltage, the current information for sampling photovoltaic display, so compared with the prior art in all photovoltaic DC-to-AC converter moulds
The way that a photovoltaic DC-to-AC converter module is selected in block as host has higher natural rate of interest and fault-resistant ability.By system board
It is responsible for the tracking of power maximum point, controls the switching on and shutting down of each photovoltaic DC-to-AC converter module and to each photovoltaic DC-to-AC converter module
Distribution power (electric current and voltage), all photovoltaic DC-to-AC converter modules are all only specified according to the switching on and shutting down of system board, output is electric
Stream, which is specified, carrys out output power, and in this case all photovoltaic DC-to-AC converter modules are all independent, any photovoltaic DC-to-AC converter module
Damage all will not influence the work of other photovoltaic DC-to-AC converter modules.On the other hand, system board can be according to current watt level
Photovoltaic DC-to-AC converter what moment of module suspend mode or wake-up are controlled, can guarantee the photovoltaic inversion in work in this way
Device module is worked as far as possible in efficiency higher point, while suspend mode other photovoltaic DC-to-AC converter modules can reduce the loss of machine,
Improve generated energy.
Referring to FIG. 1, a kind of multimode provided in an embodiment of the present invention and the central controlled photovoltaic inverter system of machine, packet
The N number of photovoltaic DC-to-AC converter module 20 for including system board 10 and being connected respectively with the system board 10 by CAN bus, N be greater than or
Natural number equal to 2；Wherein,
The DC side parallel of each photovoltaic DC-to-AC converter module 20 is connected to the input terminal of system, each photovoltaic
The exchange side of inverter module 20 is connected in parallel the output end as system.
Wherein, the DC side of the photovoltaic DC-to-AC converter module 20 is the variable dc side that photovoltaic solar panel generates.
As shown in Fig. 2, Fig. 2 is the usually used control block diagram of a photovoltaic DC-to-AC converter, outer ring is Voltage loop, that is, electricity
Pond plate power maximum point tracing control, inner ring is electric current loop.What three inner ring on the right indicated is three photovoltaic DC-to-AC converter modules
20 is in parallel, is also possible to more 20 parallel connections of photovoltaic DC-to-AC converter modules, most 15 in use at present.In new control strategy
In, outer voltage is placed in system board 10 and is realized, and the given of current inner loop is issued to by system board 10 by Can bus
Each photovoltaic DC-to-AC converter module 20.
A kind of multimode provided in an embodiment of the present invention and the central controlled photovoltaic inverter system of machine and control method are led to
The independent flexible control using the strong system board realization of fault-resistant ability to each photovoltaic DC-to-AC converter module is crossed, not only each photovoltaic
There is no coupled relation between inverter module, is independent of each other, it is reliable and stable, and structure is simple, at low cost, has good application to push away
Wide value.
Embodiment two
Referring to Fig. 3, being a kind of stream of the centralized control method of photovoltaic inverter system provided by Embodiment 2 of the present invention
Journey schematic diagram.This method multimode as provided by the embodiment of the present invention and the central controlled photovoltaic inverter system execution of machine,
Steps are as follows:
S100, the system board are independently controlled each photovoltaic DC-to-AC converter module, will be opened according to operation reserve
Shutdown command or electric current apportioning cost are sent to each photovoltaic DC-to-AC converter module by the CAN bus；
S200, each photovoltaic DC-to-AC converter module are instructed according to the switching on and shutting down carries out switching on and shutting down operation or according to described
Electric current apportioning cost works.
It should be noted that the working principle of system provided in an embodiment of the present invention is as follows:
Use a block system plate as centralized control plate, is responsible for the power maximum point tracing control of photovoltaic display, Mei Geguang
The switching on and shutting down control of inverter module is lied prostrate, while according to current power size, the state of photovoltaic DC-to-AC converter module come suspend mode, wake-up
Other photovoltaic DC-to-AC converter modules.It is connected between system board and all photovoltaic DC-to-AC converter modules by Can bus, due to maximum
The rate requirement of power tracking be not it is very high, be to do within 1 second a power disturbance in a program, the baud rate of Can bus set
It is set to 10Mbps, every 1 millisecond toward sending a data in CAN bus.Photovoltaic DC-to-AC converter module can send respective state to
System board, system board is according to the state of current photovoltaic retail store conditions and photovoltaic DC-to-AC converter module come comprehensive selection photovoltaic inversion
The booting of device module can wake up some photovoltaic DC-to-AC converter module if photovoltaic power is greater than certain value, and system board will be opened
Machine order is sent to specific photovoltaic DC-to-AC converter module, and the booting of this photovoltaic DC-to-AC converter module, simultaneity factor plate can integrate all
The state of photovoltaic DC-to-AC converter module carrys out redistribution current, and photovoltaic DC-to-AC converter module then carrys out work with the electric current that system board gives.
Can be again by specific photovoltaic DC-to-AC converter module suspend mode after power decline, system board redistribution current is specified.
When a photovoltaic DC-to-AC converter module occurs abnormal, system board will receive the information of this photovoltaic DC-to-AC converter module,
This photovoltaic DC-to-AC converter module is shut down, and redistribution current is specified simultaneously, or wakes up next module.Since photovoltaic is inverse
Become the factor that device intermodule does not couple, switching on and shutting down, the damage of photovoltaic DC-to-AC converter module all will not influence other photovoltaic DC-to-AC converters
The operation of module.
A kind of multimode provided in an embodiment of the present invention and the central controlled photovoltaic inverter system of machine and control method are led to
The independent flexible control using the strong system board realization of fault-resistant ability to each photovoltaic DC-to-AC converter module is crossed, not only each photovoltaic
There is no coupled relation between inverter module, is independent of each other, it is reliable and stable, and structure is simple, at low cost, has good application to push away
Wide value.
The above, the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although referring to before
Stating embodiment, invention is explained in detail, those skilled in the art should understand that: it still can be to preceding
Technical solution documented by each embodiment is stated to modify or equivalent replacement of some of the technical features；And these
It modifies or replaces, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (4)
1. a kind of multimode and the central controlled photovoltaic inverter system of machine, which is characterized in that total including system board and by CAN
N number of photovoltaic DC-to-AC converter module that line is connected with the system board respectively, N are the natural number more than or equal to 2；Wherein,
The DC side parallel of each photovoltaic DC-to-AC converter module is connected to the input terminal of system, each photovoltaic DC-to-AC converter
The exchange side of module is connected in parallel the output end as system.
2. a kind of multimode according to claim 1 and the central controlled photovoltaic inverter system of machine, which is characterized in that institute
The Configuration of baud rate for stating CAN bus is 10Mbps, and every 1 millisecond of the photovoltaic DC-to-AC converter module is by the CAN bus to described
System board reports a current operating state information.
3. a kind of multimode according to claim 1 and the central controlled photovoltaic inverter system of machine, which is characterized in that institute
The DC side for stating photovoltaic DC-to-AC converter module is the variable dc side of photovoltaic solar panel generation.
4. a kind of centralized control method of photovoltaic inverter system concentrates control using multimode described in claims 1 to 3 and machine
The photovoltaic inverter system of system executes, which is characterized in that the described method includes:
The system board is independently controlled each photovoltaic DC-to-AC converter module, according to operation reserve by switching on and shutting down instruct or
Electric current apportioning cost is sent to each photovoltaic DC-to-AC converter module by the CAN bus；
Each photovoltaic DC-to-AC converter module is instructed according to the switching on and shutting down to be carried out switching on and shutting down operation or is distributed according to the electric current
Value works.
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| CN201910239239.7A CN109787292A (en) | 2019-03-27 | 2019-03-27 | A kind of multimode and the central controlled photovoltaic inverter system of machine and control method |
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| CN201910239239.7A CN109787292A (en) | 2019-03-27 | 2019-03-27 | A kind of multimode and the central controlled photovoltaic inverter system of machine and control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111030176A (en) * | 2019-12-19 | 2020-04-17 | 湖南红太阳新能源科技有限公司 | Photovoltaic micro inverter unit, system and control method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105637758A (en) * | 2013-08-21 | 2016-06-01 | 腾克太阳能公司 | Fully redundant photovoltaic array |
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2019
- 2019-03-27 CN CN201910239239.7A patent/CN109787292A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105637758A (en) * | 2013-08-21 | 2016-06-01 | 腾克太阳能公司 | Fully redundant photovoltaic array |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111030176A (en) * | 2019-12-19 | 2020-04-17 | 湖南红太阳新能源科技有限公司 | Photovoltaic micro inverter unit, system and control method |
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