CN108900157A - A kind of intelligent photovoltaic terminal box and current regulation method - Google Patents
A kind of intelligent photovoltaic terminal box and current regulation method Download PDFInfo
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- 238000004891 communication Methods 0.000 claims description 29
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- 238000006243 chemical reaction Methods 0.000 description 1
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- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/30—Electrical components
- H02S40/34—Electrical components comprising specially adapted electrical connection means to be structurally associated with the PV module, e.g. junction boxes
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/66—Regulating electric power
- G05F1/67—Regulating electric power to the maximum power available from a generator, e.g. from solar cell
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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
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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
- 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
- Y04S40/126—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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
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- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Photovoltaic Devices (AREA)
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Abstract
The invention discloses a kind of intelligent photovoltaic terminal boxes, it includes photovoltaic cell component circuit module, microprocessor module, MPPT drive module and battery strings voltage or current acquisition module, photovoltaic cell component circuit module includes several concatenated photovoltaic electrification components, battery strings voltage or current acquisition module are used to acquire the voltage or current signal of each photovoltaic electrification component of photovoltaic cell component circuit module, and microprocessor module controls MPPT drive module.Substantial effect of the invention is：Pass through the electric current of each accurate photovoltaic electrification component of MPPT drive module, so that each component electric current is equal to maximum power point electric current, and main line voltage is adjusted by BUCK-BOOST circuit module and improves generated energy so as to avoid " wooden pail effect " of photovoltaic module；The current regulation method of the photovoltaic cell string can accurately adjust each component electric current and improve generated output.
Description
Technical field
The present invention relates to photovoltaic cell module or array field more particularly to a kind of intelligent photovoltaic terminal box and current regulation sides
Method.
Background technique
Solar energy will become one of global main energy sources in 21 century, on the earth other nearly all energy all directly or
It fetches from solar energy, the advantages that solar energy has that resource is sufficient, long-lived, widely distributed, safe and clean, technically reliable.Solar energy
Light power generation refers to the generation mode it is not necessary that luminous energy to be directly changed into electric energy by thermal process, by the exploitation of many years, solar energy
Power generation has also obtained significant progress.Solar power generation is set to be really achieved realistic scale, first is that improve solar photoelectric change
It changes efficiency and reduces its cost, second is that realize the same grid network of solar power generation.Solar battery is that utilization can generate
Photoelectric material converts light energy into electric energy according to photovoltaic effect.Wherein, solar components plate is widely used in building
Electricity generation system, a part is large-scale ground photovoltaic plant, a part is photovoltaic power station.
Photovoltaic junction box is interconnected for realizing solar components plate and external power supply component, thus by solar components plate
Power output to external important component.Solar components plate terminal box is also the bypass protector of solar components plate,
When solar components intralamellar part battery crack occurs or is blocked by shadow and generates hot spot effect, electric current will be by bypassing two poles
The protective device of pipe avoids the hot spot position persistent fever on component palette, to protect the safety of solar components plate.
105932959 A of Chinese patent application publication No. CN data of publication of application on 09 07th, 2016, discloses one kind
The photovoltaic junction box of bypass integration module with component level monitoring function, including box body, the box body lower part are equipped with pedestal, top
Equipped with box cover, and the box body top is equipped with mechanical localization mechanism, is fixed with diode integrated bypass mould on the mechanical localization mechanism
Block, the diode integrated bypass module have at least two metal connecting sheet, meanwhile, it is equipped with and is electrically connected to accordingly in the box body
The positive photovoltaic connector and cathode photovoltaic connector of metal connecting sheet, the anode photovoltaic connector are electrically connected with a cable, should
The other end of root cable extend out to the outside of the box body, and the box body lower part is equipped with an accommodating chamber, is equipped with one group in the accommodating chamber
The connecting line of part grade monitoring module, the component level monitoring module is soldered to corresponding gold medium frequency welding or by way of adding tin welding
Belong to connection sheet, it is an advantage of the invention that：Convenient for monitoring and repairing.But in above-mentioned patent with component level monitoring function
The photovoltaic junction box of integration module is bypassed, it only has the characteristics that convenient for monitoring and maintenance.Due to being when photovoltaic module application
Series connection, electric current must be consistent, but since the difference between component, sunlight blocks, assembly property change in long term, crack etc. are more
Kind factor causes component electric current to decline, and then will lead to other normal component electric currents on the string and also decline, to deviate its maximum
Power points electric current Imp, so other normal components will not be in maximum power point, output power decline, here it is photovoltaic modulies
" wooden pail effect ".
Summary of the invention
The technical problem to be solved by the present invention is to how design a kind of to realize that the electric current to every block assembly is tracked and controlled
The intelligent photovoltaic terminal box of system.
Used technical solution is the present invention in order to solve the above problem：A kind of intelligent photovoltaic terminal box, which is characterized in that
Including photovoltaic cell component circuit module, microprocessor module, MPPT drive module and battery strings voltage or current acquisition module,
The photovoltaic cell component circuit module includes several concatenated photovoltaic electrification components, the battery strings voltage or current acquisition
Module is used to measure the voltage of each photovoltaic electrification component or electric current and transmits a signal to microprocessor module, the microprocessor
Module controls the MPPT drive module, and the MPPT drive module controls each photovoltaic of the photovoltaic cell component circuit module
The electric current of electrification component.The electric current that each photovoltaic electrification component is individually controlled by MPPT drive module is allowed to be equal to maximum work
Rate point electric current causes other normal component electric currents connected in series so as to avoid the electric current decline of a photovoltaic electrification component
Decline, to improve generated energy.
Preferably, the substring both ends of each photovoltaic electrification component of the photovoltaic cell component circuit module and two poles
Pipe is in parallel, and the both ends of each photovoltaic electrification component substring while, the output end reversal of diode in parallel with MOSFET
At the both ends of photovoltaic electrification component, the battery strings voltage or current acquisition module are for measuring the voltage or electricity at component both ends
Stream, the MPPT driving mould drive MOSFET by I/O port.Microprocessor module generates MPPT driving letter by MPPT algorithm
Number, the corresponding I/O port of MPPT drive module drives corresponding MOSFET work, to make the Current Voltage of each photovoltaic electrification component
In maximum power point.
Preferably, the output port both ends of the photovoltaic cell component circuit module are equipped with the diode of reversal connection.
Preferably, the intelligent photovoltaic terminal box further includes BUCK-BOOST circuit module, outputs and inputs voltage acquisition
Module and output and input current acquisition module；The BUCK-BOOST circuit module is set to photovoltaic cell component circuit mould
On the main line of block, it is controlled by MPPT drive module, for adjusting main line voltage or electric current；It is described to output and input voltage acquisition mould
Block is connected to the diode both ends at photovoltaic cell component circuit module output port, for measuring main line output voltage；It is described
It outputs and inputs current acquisition module to be located on main line, for measuring main line electric current.When MPPT drive module improves main line
When generation current, microprocessor module obtains reality by outputting and inputting the port voltage value of voltage acquisition module acquisition
Border power generation output power, by comparison actual power output power and maximum power value, microprocessor module passes through control MPPT
Drive module controls BUCK-BOOST circuit module, so that main line voltage is adjusted, so that actual power output power and maximum
Performance number is equal.
Preferably, the intelligent photovoltaic terminal box further includes main control module and radio-frequency communication module；The main control module packet
Include storage unit, display unit, push-button unit, network interface unit, RS485 and data processing unit；The radio-frequency communication module is used
The data exchange between data exchange and main control module and cloud platform between main control module and microprocessor module.It is main
Control module is stored, shown and is handled to the voltage and current data that microprocessor module is collected, to reach centralized management
Purpose, and main control module is regulated and controled and is automatically shut down to microprocessor module by wireless communication.
Preferably, the intelligent photovoltaic terminal box further includes communication module, remote-monitoring controller and temperature detecting module；
The remote-monitoring controller is for remotely controlling main control module；The communication module is wire communication or wireless communication, is used
Data exchange between main control module and remote-monitoring controller；The temperature detecting module is thermistor, is located at wiring
Inside box, for detecting junction box temperature.Remote-monitoring controller is mobile phone, plate or other mobile terminals, user
Main control module is controlled by APP, then main control module controls microprocessor module by wireless communication, and then realizes long-range control
System.
Preferably, the MPPT drive module includes reduction voltage circuit, IO driving and drive signal generator；The IO drives
It employs in driving MOSFET；The drive signal generator is for driving BUCK-BOOST circuit module；The reduction voltage circuit is used
It powers in for MPPT drive module and microprocessor module.
Preferably, the wireless communication is that WiFi or 2G or 3G or 4G is communicated.
A kind of current regulation method of photovoltaic cell string, suitable for any one intelligence described in claim or 6 or 7 or 8
Energy photovoltaic junction box, which is characterized in that include the following steps：
S1：Each component is equipped with current regulating circuit, adjusts the electric current on each component by MPPT drive module；
S2：Voltage or current value on each component are measured by battery strings voltage or current acquisition module, by microprocessor
MPPT algorithm operation is carried out after resume module, and exports MPPT driving signal；
S3：Microprocessor module controls the work of MPPT drive module, by the driving voltage of IO driving drive corresponding MOSFET into
Row Current Voltage is adjusted, so that the Current Voltage of each component is equal to the Current Voltage of the maximum functional point in each component；
S4：MPPT drive module drives BUCK-BOOST circuit module to adjust the two of photovoltaic cell string by drive signal generator
Terminal voltage value, so that the product of main line voltage value and main line current value reaches maximum power value.
Preferably, battery strings voltage or current acquisition module, outputting and inputting voltage acquisition module and input and defeated
Current acquisition module each component voltage collected or current signal, main line voltage signal and main line current signal are transmitted to out
Microprocessor module, then the microprocessor module controls the MPPT drive module, and last MPPT drive module controls institute
BUCK-BOOST circuit is stated, keeps photovoltaic module string current balance type consistent, to make each component operation on maximum power point.
Substantial effect of the invention is：1, by the electric current of each accurate photovoltaic electrification component of MPPT drive module,
So that each component electric current is equal to maximum power point electric current, and main line voltage is adjusted by BUCK-BOOST circuit module, thus
" wooden pail effect " for avoiding photovoltaic module, improves generated energy；2, control data are managed concentratedly by main control module,
And realized by remote-monitoring controller and the long-range control of electrification component and intelligence are turned off, it is realized by the acquisition to data big
Data analysis, realizes abnormal determination and positioning, to realize intelligent O&M；3, the current regulation method of the photovoltaic cell string can
It accurately adjusts each component electric current and improves generated output.
Detailed description of the invention
Fig. 1 is the structural block diagram of intelligent photovoltaic terminal box of the invention.
Fig. 2 is the circuit connection schematic diagram of intelligent photovoltaic terminal box of the invention.
In figure：1, microprocessor module, 2, photovoltaic cell component circuit module, 3, MPPT drive module, 4, battery strings electricity
Press acquisition module, 5, output and input voltage acquisition module, 6, output and output current acquisition module, 7, BUCK-BOOST circuit
Module, 8, radio-frequency communication module, 9, temperature detecting module, 10, main control module, 11, communication module, 12, remote-monitoring controller.
Specific embodiment
Below by specific embodiment, and in conjunction with attached drawing, a specific embodiment of the invention is further described in detail.
Used technical solution is the present invention in order to solve the above problem：Fig. 1 is intelligent photovoltaic terminal box of the invention
Structural block diagram, the intelligent photovoltaic terminal box include photovoltaic cell component circuit module 2, microprocessor module 1, MPPT drive module
3, battery strings voltage acquisition module 4, BUCK-BOOST circuit module 7, output and input voltage acquisition module 5, output and input
Current acquisition module 6, main control module 10, PLC, radio-frequency communication module 8, communication module 11, temperature detecting module 9 and long-range monitoring
Controller 12.Photovoltaic cell component circuit module 2 includes several concatenated photovoltaic electrification components, battery strings voltage acquisition module
4 for measuring the voltage of each photovoltaic electrification component and voltage value signal being transmitted to microprocessor module 1, microprocessor module 1
MPPT drive module 3 is controlled, MPPT drive module 3 controls the electricity of each photovoltaic electrification component of photovoltaic cell component circuit module 2
Stream.The both ends of each photovoltaic electrification component of photovoltaic cell component circuit module 2 and diodes in parallel, and each photovoltaic
The both ends of electrification component are in parallel with MOSFET simultaneously, and the reversal of diode is in the both ends of photovoltaic electrification component, battery strings voltage acquisition
Module 4 is used for the voltage at measuring diode both ends, and MPPT drives mould to drive MOSFET, photovoltaic cell component circuit by I/O port
The output port both ends of module 2 are equipped with the diode of reversal connection.When each photovoltaic power generation group that battery strings voltage acquisition module 4 measures
Whens the voltage of part is not equal, microprocessor module 1 determines the electric current decline of the photovoltaic electrification component of low-voltage, subsequent microprocessor mould
Block 1 drives the corresponding I/O port of MPPT drive module 3 to drive corresponding MOSFET work, to increase corresponding photovoltaic electrification component
Electric current keeps the electric current of each photovoltaic electrification component equal.MPPT drive module 3 includes reduction voltage circuit, IO driving and driving signal hair
Raw device, IO driving is for driving MOSFET, and drive signal generator is for driving BUCK-BOOST circuit module 7.Pass through MPPT
Drive module 3 individually controls the electric current of each photovoltaic electrification component, is allowed to be equal to maximum power point electric current, so as to avoid one
The electric current decline of photovoltaic electrification component causes other normal component electric currents connected in series and also declines, to improve generated energy.
BUCK-BOOST circuit module 7 is set on the main line of photovoltaic cell component circuit module 2, is controlled by MPPT drive module 3, is used
In adjusting main line voltage；Voltage acquisition module 5 is output and input to be connected at 2 output port of photovoltaic cell component circuit module
Diode both ends, for measuring main line output voltage；Current acquisition module 6 is output and input to be located on main line, it is dry for measuring
Road electric current.When MPPT drive module 3 improves the generation current on main line, microprocessor module 1 is by outputting and inputting voltage
The port voltage value that acquisition module 5 obtains, and then obtains actual power output power, by comparison actual power output power and
Performance number is set, microprocessor module 1 controls BUCK-BOOST circuit module 7 by control MPPT drive module 3, to adjust
Main line voltage is saved, so that actual power output power is equal with setting performance number.Main control module 10 includes storage unit, display list
Member, push-button unit, network interface unit, RS485 and data processing unit；PLC be connected to main control module 10 and microprocessor module 1 it
Between, main control module 10 passes through PLC control processor module；Radio-frequency communication module 8 is used for main control module 10 and microprocessor module 1
Between data exchange, send cloud for the operating state data of photovoltaic module or obtain operational order from cloud, with realize
Networking, and remotely monitored and intelligent O&M by software realization.The voltage and electricity that main control module 10 collects microprocessor module 1
Flow data is stored, shown and is handled, to achieve the purpose that centralized management, and main control module 10 passes through PLC to micro- place
Reason device module 1 is regulated and controled and is automatically shut down.Remote-monitoring controller 12 is for remotely controlling main control module 10；Communication module 11
For wire communication perhaps wireless communication wirelessly communicate for WiFi or 2G or 3G or 4G communication, be used for 10 He of main control module
Data exchange between remote-monitoring controller 12.Remote-monitoring controller 12 is mobile phone, plate or other mobile terminals, is used
Family controls main control module 10 by APP, and then main control module 10 controls microprocessor module 1 by PLC, and then realizes long-range control
System.Temperature detecting module 9 is thermistor, is located on photovoltaic cell string, for monitoring the temperature of photovoltaic cell string.
Fig. 2 is the circuit connection schematic diagram of intelligent photovoltaic terminal box of the invention, as shown, the photovoltaic cell string is divided
For three photovoltaic electrification components, the both ends of entire battery strings it is in parallel the diode D of reversal connection4, diode D4Output end connect respectively
V+And V-, diode D4On the main line output port at BUCK-BOOST circuit rear, upper element is first assembly, middle part
Component is the second component, and lower component is that third is set up, wherein the both ends of first assembly it is in parallel the diode D being reversely connected1, together
Shi Binglian MOSFET1；The both ends of second component it is in parallel the diode D of reversal connection2, while MOSFET in parallel1；Third component
Both ends it is in parallel the diode D of reversal connection3, while MOSFET in parallel3。MOSFET1、MOSFET2And MOSFET3Driving end point
It Wei not IO Driver1, IO Driver2 and IO Driver3.BUCK-BOOST circuit is located at the anode on photovoltaic cell string main line
End, is controlled by the drive signal generator of driving chip, driving chip further includes as MPPT drive module 3, the driving chip
Reduction voltage circuit, system power supply is powered after passing through reduction voltage circuit for driving chip, and driving chip itself is equipped with 10V operating switch
Power circuit, the driving chip further include IO driving port, and IO drives port as MOSFET driving circuit, and IO drives port to use
In respectively by driving IO Driver1, IO Driver2 and IO Driver3 come for first assembly, the second component and third group
Part increases electric current.Battery strings voltage acquisition module 4 divides for three voltage acquisition units, measures D respectively1、D2And D3Both ends electricity
Pressure value.It outputs and inputs voltage acquisition module 5 and the voltage signal at entire battery strings both ends is transmitted to Micro-processor MCV, input
Main line current signal is transmitted to Micro-processor MCV with output current acquisition module, battery strings voltage acquisition module 4 is by D1、D2With
D3The voltage value at both ends be transmitted to Micro-processor MCV, Micro-processor MCV passes through comparison D1、D2And D3Both ends voltage value
Difference to send driving chip control signal to driving chip, and then controls the output at IO driving end.Photovoltaic module voltage or electricity
Stream signal outputs and inputs voltage signal, outputs and inputs current signal and thermistor temp signal is transmitted to micro process
The AD conversion unit ADC of device MCU carries out data processing, treated signal data, photovoltaic module output voltage data,
BUCK-BOOST output voltage data and BUCK-BOOST output current data by radio frequency units or WiFi or
2G or 3G or 4G communication or RS485 are transmitted to cloud.3.3V LDO circuit is Micro-processor MCV power supply, Micro-processor MCV
Practical photovoltaic generation power is calculated by main line current value and the voltage value at entire battery strings both ends, by comparing predetermined power value
Adjust the voltage value at entire battery strings both ends, Micro-processor MCV is by calculating practical photovoltaic generation power and predetermined power value
Difference come adjust driving chip control signal, and then control driving chip drive signal generator instruction, finally by
BUCK-BOOST circuit adjusts total voltage, so that practical photovoltaic generation power is equal with predetermined power value.Micro-processor MCV
It further include less radio-frequency and PLC, less radio-frequency is for the data exchange between main control MCU and Micro-processor MCV.Microprocessor
MCU is connect by PLC with main control MCU, and main control MCU includes storage unit, display unit, push-button unit, network interface unit, RS485
And data processing unit, PLC are connected between main control MCU and micro process MCU, main control MCU passes through PLC control processor MCU.It is main
Control MCU is stored, shown and is handled to the voltage and current data that Micro-processor MCV is collected, to reach centralized management
Purpose, and main control MCU is regulated and controled and is automatically shut down to Micro-processor MCV by PLC.Main control MCU by wireless communication or
Person's wire communication is connected to remote-monitoring controller, wherein wireless communication is that WiFi or 2G or 3G or 4G is communicated, remotely
Monitoring controller is mobile phone or plate or other mobile terminals, and user can send out photovoltaic by remote monitoring software APP
Electric process is remotely monitored and is operated, additionally it is possible to and big data analysis is carried out by data exchange, realizes abnormal determination and positioning,
To realize intelligent O&M.
A kind of current regulation method of photovoltaic cell string, suitable for any one intelligence described in claim or 6 or 7 or 8
Energy photovoltaic junction box, which is characterized in that include the following steps：
S1：Photovoltaic cell string is divided into several concatenated photovoltaic electrification components, each component is equipped with current regulating circuit, leads to
It crosses MPPT drive module and adjusts electric current on each component；
S2：The voltage value on each component is measured by battery strings voltage acquisition module, which passes through microprocessor module
It is compared after processing, and calculates the difference between each voltage value and maximum voltage value, MPPT driving is calculated by the difference
The driving voltage value of the IO driving of module；
S3：Microprocessor module controls the work of MPPT drive module, so that the driving voltage value of IO driving is equal to the calculating in S2
Value drives MOSFET current source on corresponding assembly by the driving voltage of IO driving, so that the electric current of each component is impartial
Maximum current in each component；
S4：MPPT drive module drives BUCK-BOOST circuit module to adjust the two of photovoltaic cell string by drive signal generator
Terminal voltage value, so that the product of main line voltage value and main line current value reaches setting performance number.
Above-mentioned embodiment is only a preferred solution of the present invention, not the present invention is made in any form
Limitation, there are also other variations and modifications on the premise of not exceeding the technical scheme recorded in the claims.
Claims (10)
1. a kind of intelligent photovoltaic terminal box, which is characterized in that including photovoltaic cell component circuit module, microprocessor module,
MPPT drive module and battery strings voltage or current acquisition module, the photovoltaic cell component circuit module include several series connection
Photovoltaic electrification component, the battery strings voltage or current acquisition module are used to measure the voltage or electric current of each photovoltaic electrification component
And microprocessor module is transmitted a signal to, the microprocessor module controls the MPPT drive module, the MPPT driving
Module controls the electric current of each photovoltaic electrification component of the photovoltaic cell component circuit module.
2. a kind of intelligent photovoltaic terminal box according to claim 1, which is characterized in that the photovoltaic cell component circuit mould
The substring both ends of each photovoltaic electrification component of block and diodes in parallel, and the both ends of each photovoltaic electrification component substring
In parallel with MOSFET simultaneously, the output end reversal of diode is in the both ends of photovoltaic electrification component, the battery strings voltage or electricity
Stream acquisition module is used to measure the voltage or electric current at component both ends, and the MPPT driving mould drives MOSFET by I/O port.
3. a kind of intelligent photovoltaic terminal box according to claim 2, which is characterized in that the photovoltaic cell component circuit mould
The output port both ends of block are equipped with the diode of reversal connection.
4. a kind of intelligent photovoltaic terminal box according to claim 3, which is characterized in that further include BUCK-BOOST circuit mould
Block outputs and inputs voltage acquisition module and outputs and inputs current acquisition module；
The BUCK-BOOST circuit module is set on the main line of photovoltaic cell component circuit module, is controlled by MPPT driving mould
Block, for adjusting main line voltage or electric current；
The diode two for outputting and inputting voltage acquisition module and being connected at photovoltaic cell component circuit module output port
End, for measuring main line output voltage；
The current acquisition module that outputs and inputs is located on main line, for measuring main line electric current.
5. a kind of intelligent photovoltaic terminal box according to claim 1, which is characterized in that further include that main control module and radio frequency are logical
Believe module；
The main control module includes storage unit, display unit, push-button unit, network interface unit, RS485 and data processing unit；
The radio-frequency communication module is for the data exchange and main control module and cloud between main control module and microprocessor module
Data exchange between platform.
6. a kind of intelligent photovoltaic terminal box according to claim 5, which is characterized in that further include communication module, long-range prison
Control controller and temperature detecting module；The remote-monitoring controller is for remotely controlling main control module；The communication module is
Wire communication or wireless communication, for the data exchange between main control module and remote-monitoring controller；The temperature detection
Module is thermistor, is located at junction box, for detecting junction box temperature.
7. a kind of intelligent photovoltaic terminal box according to claim 4, which is characterized in that the MPPT drive module includes drop
Volt circuit, IO driving and drive signal generator；The IO driving is for driving MOSFET；The drive signal generator is used for
Drive BUCK-BOOST circuit module；The reduction voltage circuit is used to power for MPPT drive module and microprocessor module.
8. a kind of intelligent photovoltaic terminal box according to claim 6, which is characterized in that it is described wireless communication be WiFi or
2G or 3G or 4G communication.
9. a kind of current regulation method of photovoltaic cell string, suitable for any one intelligence described in claim or 6 or 7 or 8
Photovoltaic junction box, which is characterized in that include the following steps：
S1：Each component is equipped with current regulating circuit, adjusts the electric current on each component by MPPT drive module；
S2：Voltage or current value on each component are measured by battery strings voltage or current acquisition module, by microprocessor
MPPT algorithm operation is carried out after resume module, and exports MPPT driving signal；
S3：Microprocessor module controls the work of MPPT drive module, by the driving voltage of IO driving drive corresponding MOSFET into
Row Current Voltage is adjusted, so that the Current Voltage of each component is equal to the Current Voltage of the maximum functional point in each component；
S4：MPPT drive module drives BUCK-BOOST circuit module to adjust the two of photovoltaic cell string by drive signal generator
Terminal voltage value, so that the product of main line voltage value and main line current value reaches maximum power value.
10. a kind of current regulation method of photovoltaic cell string according to claim 9, which is characterized in that battery strings voltage
Or it current acquisition module, outputs and inputs voltage acquisition module and outputs and inputs current acquisition module each component collected
Voltage or current signal, main line voltage signal and main line current signal are transmitted to microprocessor module, then the micro process
Device module controls the MPPT drive module, and last MPPT drive module controls the BUCK-BOOST circuit, makes photovoltaic module
Current balance type of going here and there is consistent, to make each component operation on maximum power point.
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Application publication date: 20181127 |