CN106877811A - Collecting and distributing type photovoltaic intelligent power control system, photovoltaic power supply system and control method - Google Patents
Collecting and distributing type photovoltaic intelligent power control system, photovoltaic power supply system and control method Download PDFInfo
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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
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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
- 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
- H02S40/32—Electrical components comprising DC/AC inverter means associated with the PV module itself, e.g. AC modules
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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
- H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
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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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Abstract
The present invention discloses a kind of collecting and distributing type photovoltaic intelligent power control system, photovoltaic power supply system and control method, the intelligent power control system includes multiple single group string control units and the central control unit being connected with each single group string control unit respectively, each single group string control unit corresponds to the power output of control photovoltaic group string all the way respectively, and central control unit coordinates each single group string control unit of control to coordinate to control the power output of photovoltaic group string described in each road；The photovoltaic power supply system includes photovoltaic array, above-mentioned control system and inverter；The photovoltaic group string on correspondence road is carried out MPPT controls by each single group string control unit respectively in the control method, and central control unit obtains the power output state of each road photovoltaic group string, the power output of each road photovoltaic group string of control adjustment in real time.The present invention has can realize the matching of photovoltaic generation intelligent optimization and total tune control, generating efficiency and high reliability.
Description
Technical field
The present invention relates to technical field of photovoltaic power generation, more particularly to a kind of collecting and distributing type photovoltaic intelligent power control system, light
Volt power-supply system and control method.
Background technology
Solar photovoltaic generation system is made up of equipment such as photovoltaic cell component array, the distribution that confluxes, current transformers, wherein
Photovoltaic cell component array includes multiple photovoltaic group strings, and each photovoltaic group string is in series by some photovoltaic modulies.Large-sized photovoltaic
Floor space in electricity generation system due to photovoltaic module array is big, and there is some difference for each photovoltaic group string output characteristics, and can
Can be influenceed by factors such as shadow occlusions, the mistake of photovoltaic module array generator power will be caused using single system control
Match somebody with somebody, be particularly applied in the photovoltaic plants of occasion such as knob, heavy construction roof, due to periphery physical features, building, trees
Etc. the influence blocked, the generated energy of system photovoltaic module mismatch loss even up to 3% ~ 5%.
For the photovoltaic plant for being applied to the occasions such as hills, large complicated building roof, to reduce the mismatch of photovoltaic module,
Collecting and distributing type photovoltaic generating system is typically with present, as shown in Figure 1, 2, is confluxed boosting unit by photovoltaic cell component, direct current
And inversion unit composition, the photovoltaic conflux equipment of boosting unit replacement routine of being confluxed by direct current, while maximum defeated to obtain
Go out power, MPPT maximum power point tracking is set in direct current confluxes boosting unit（MPPT）It is controlled, each direct current confluxes boosting
Some photovoltaic group strings of unit each share a MPPT controller, if being by 1 tunnel MPPT controller tracking main line photovoltaic group
Multigroup string MPPT of string, and separate control between each MPPT controller, realize the MPPT controls to each region of photovoltaic array.
But use the collecting and distributing type photovoltaic generating system of above-mentioned multigroup string MPPT control modes, on the one hand, in photovoltaic array
There is some difference for each photovoltaic group string output characteristics, and multigroup string MPPT control modes control multiple photovoltaic groups by MPPT all the way
String, it is impossible to recognize the difference of each photovoltaic group string in parallel branch, the difference between photovoltaic group string cannot be also balanced, thus
Electricity generation system is still present photovoltaic group string parallel connection mismatch problems, influences system generated energy；On the other hand, each MPPT controller it
Between separate control, mutually coordinated control cannot be realized between photovoltaic array entirety, when exist photovoltaic group string break down or
Be blocked by shadow so that reduce or cannot effective output when, then can cause reduce photovoltaic generation overall generating efficiency.
The content of the invention
The technical problem to be solved in the present invention is that：For the technical problem that prior art is present, the present invention provides one
Plant simple structure, required low cost, photovoltaic generation Optimized Matching can be realized and the collecting and distributing type photovoltaic intelligent of total tune control
Power control system, and the collecting and distributing type photovoltaic power supply system that generating efficiency is high and system reliability is high, and implementation method it is simple,
The matching of photovoltaic generation intelligent optimization and total tune can be realized, the controlling party of photovoltaic efficiency and system reliability is improved
Method.
In order to solve the above technical problems, technical scheme proposed by the present invention is：
A kind of collecting and distributing type photovoltaic intelligent power control system, it is characterised in that including multiple single group string control units and difference
The central control unit being connected with single group string control unit each described, each described single group string control unit corresponds to control respectively
The power output of photovoltaic group string all the way, the central control unit coordinates each single group string control unit of control to coordinate control
The power output of photovoltaic group string described in each road.
As the further improvement of control system of the present invention：The single group string control unit includes MPPT controller, is used for
The peak power of the control tracking photovoltaic group string.
As the further improvement of control system of the present invention：The MPPT controller include power tube drive circuit, voltage/
Current sampling circuit and processor, the input voltage/electric current of photovoltaic group string described in the voltage/current sampling circuit samples
And output voltage/electric current, export to processor, the processor according to the sampled signal for receiving, by the power tube
Drive circuit driving power pipe, controls the photovoltaic group string Maximum Power Output.
As the further improvement of control system of the present invention：The central control unit includes power coordination control module,
The power coordination control module obtains the power output state of each photovoltaic group string respectively, and enters with preset state respectively
Row compares, and adjusts the power output of each road photovoltaic group string by each single group string control unit according to comparative result.
As the further improvement of control system of the present invention：When the power output that there is target photovoltaic group string is less than preset value
When, the power output of remaining photovoltaic group string is specifically adjusted by corresponding each single group string control unit respectively, to compensate mesh
Mark the power output of photovoltaic group string.
Used as the further improvement of control system of the present invention, the central control unit also includes monitoring module, institute
Stating monitoring module includes the state acquisition submodule, condition adjudgement submodule and the early warning submodule that are sequentially connected, described
State acquisition submodule obtains the status data of each road photovoltaic group string, output to the condition adjudgement submodule in real time；The shape
State judging submodule judges the operation shape of each road photovoltaic group string, each single group string control unit according to the status data for receiving
State, if determining in the presence of abnormal, early warning signal is sent by the early warning submodule；The monitoring module also includes abnormal
Control submodule, for when the early warning signal sends the specified time, control to disconnect and judges there is abnormal photovoltaic group string.
The present invention further provides a kind of collecting and distributing type photovoltaic power supply system, including multiple photovoltaic arrays, multiple above-mentioned intelligence
Power control system and the inverter being connected with intelligent power control system each described respectively, each described photovoltaic array pair
An intelligent power control system should be connected, the photovoltaic array Zhong Ge roads photovoltaic group string is connected respectively the intelligence
A single group string control unit in power control system, each described photovoltaic array controls system by the corresponding intelligent power
System controlled output power, exchange electricity output is converted to by the inverter by photovoltaic DC electricity.
The present invention further provides the control method of above-mentioned intelligent power control system, it is characterised in that step includes：
1）The photovoltaic group string on correspondence road is carried out MPPT controls by each single group string control unit respectively, controls each road photovoltaic group string defeated
Go out peak power；
2）The central control unit obtains the power output state of each road photovoltaic group string in real time, and carries out with preset state respectively
Compare, adjust the power output of each road photovoltaic group string by each single group string control unit according to comparative result.
As the further improvement of the inventive method：The step 2）In when the power output that there is target photovoltaic group string it is small
When preset value, the power output of remaining photovoltaic group string is specifically adjusted by corresponding each single group string control unit respectively,
To compensate the power output of target photovoltaic group string.
As the further improvement of the inventive method：The status data of each road photovoltaic group string is obtained in real time, according to the shape
State data judge the running status of each road photovoltaic group string, if determining in the presence of abnormal, send early warning signal；The condition monitoring step
When being additionally included in the early warning signal suddenly and sending the specified time, control disconnects and judges there is abnormal photovoltaic group string step.
Compared with prior art, the advantage of the invention is that：
1）The present invention constitutes bottom control by multiple single group string control units, by single group string control unit correspondence control one
Road photovoltaic group string, the output characteristics that can be based on each photovoltaic group string carries out independent dispersion control, it is to avoid different photovoltaic group string outputs
The generated output mismatch that difference is caused, solves the problems, such as the power mismatch between photovoltaic group string, makees in combination with central control unit
Coordinate to control each single group string control unit for top level control, each photovoltaic group string in photovoltaic generating system can be realized
Intelligent optimization is matched and total tune control；
2）The present invention further accesses photovoltaic group string all the way and realizes that single group string MPPT is controlled by a MPPT controller correspondence, makes
Each photovoltaic group string being capable of Maximum Power Output, it is ensured that the maximization of photovoltaic generating system power, with reference to centralized Control list
Unit, can intelligent optimization, coordinate the power output of each photovoltaic group string, so as to realize the total optimization that photovoltaic DC generates electricity, make
Each photovoltaic group string overall work is obtained in optimum state, the overall generating efficiency and reliability of system is improved；
3）The present invention further by real-time monitoring photovoltaic group string, the state of single group string control unit, is being determined in the presence of abnormal
When send early warning signal, to carry out early warning in advance, it is possible to achieve intelligent monitoring is managed, reduce damage that such as equipment downtime is caused
Lose, the generated energy and system reliability of effective guarantee photovoltaic system.
Brief description of the drawings
Fig. 1 is that direct current confluxes the principle schematic diagram. of boosting unit in traditional collecting and distributing type photovoltaic generating system.
Fig. 2 is the principle schematic diagram. of traditional collecting and distributing type photovoltaic generating system.
Fig. 3 is the principle schematic diagram. of the collecting and distributing type photovoltaic intelligent power control system of the embodiment of the present invention 1.
Fig. 4 is the principle schematic diagram. of the collecting and distributing type photovoltaic power supply system of the embodiment of the present invention 1.
Fig. 5 is that the control method of the intelligent power control system of the embodiment of the present invention 2 realizes schematic flow sheet.
Fig. 6 is step 2 in the embodiment of the present invention 2）Implement schematic flow sheet.
Marginal data：1st, single group string control unit；2nd, central control unit.
Specific embodiment
Below in conjunction with Figure of description and specific preferred embodiment, the invention will be further described, but not therefore and
Limit the scope of the invention.
Embodiment 1：
As shown in figure 3, the present embodiment collecting and distributing type photovoltaic intelligent power control system includes multiple single group string control units 1 and divides
The central control unit 2 not being connected with each single group string control unit 1, each single group string control unit 1 corresponds to control one respectively
The power output of road photovoltaic group string, central control unit 2 coordinates each single group string control unit 1 of control to coordinate to control each road photovoltaic
The power output of group string.
The present embodiment passes through multiple single group string control units 1 and constitutes bottom control, by a correspondence of single group string control unit 1
Photovoltaic group string all the way is controlled, the output characteristics that can be based on each photovoltaic group string carries out independent dispersion control, it is to avoid different photovoltaic groups
The generated output mismatch that string output difference is caused, solves the problems, such as the power mismatch between photovoltaic group string, in combination with centralized Control
Unit 2 is coordinated to control each single group string control unit 1 as top level control, constitutes the bilayer of bottom control and top level control
Coordinated control system, can realize the intelligent optimization matching and total tune control of each photovoltaic group string in photovoltaic generating system.
In the present embodiment, single group string control unit 1 includes MPPT controller, the maximum work for controlling tracking photovoltaic group string
Rate.As shown in figure 3, the present embodiment accesses photovoltaic group string all the way by a MPPT controller correspondence, the direct current of photovoltaic group string is controlled
Peak power is input into and tracked, realizes that single group string MPPT is controlled so that each photovoltaic group string being capable of Maximum Power Output, it is ensured that
The maximization of photovoltaic generating system power, with reference to central control unit 2, can intelligent optimization, coordinate the defeated of each photovoltaic group string
Go out power, so as to realize the total optimization that photovoltaic DC generates electricity, improve the overall generating efficiency and reliability of system.
In the present embodiment, MPPT controller specifically includes power tube drive circuit, voltage/current sample circuit and treatment
Device, processor is connected with power tube drive circuit, voltage/current sample circuit and telecommunication circuit, detection circuit respectively, electricity
Input voltage/the electric current and output voltage/electric current of pressure/current sampling circuit sampling photovoltaic group string, export to processor, place
According to the sampled signal for receiving, by power tube drive circuit driving power pipe, control photovoltaic group string exports maximum work to reason device
Rate.The specific auxiliary circuit also including temperature sensing circuit etc. of MPPT controller.The concrete structure of MPPT controller can be according to reality
Demand is set.
In the present embodiment, central control unit 2 specifically includes power coordination control module, power coordination control module difference
Obtain the power output state of each photovoltaic group string, and be compared with preset state respectively, each list is passed through according to comparative result
Group string control unit 1 adjusts the power output of each road photovoltaic group string.When exist photovoltaic group string break down or be blocked by shadow,
So that reduce or cannot effective output when, power coordination control module adjusts each road light by each single group string control unit 1
The power output of volt group string, with power output needed for compensating the photovoltaic group string for breaking down or being blocked by shadow, can keep total
Stable output power so that each photovoltaic group string overall work is in optimum state.
Specifically when each single group string control unit 1 works, Real-time Collection corresponds to the work shape of photovoltaic group string to the present embodiment
State parameter, and it is sent to central control unit 2；After central control unit 2 receives the working status parameter of each photovoltaic group string,
The preset state with state parameter is compared respectively, when the power output that there is target photovoltaic group string is less than preset value, tool
Body adjusts the power output of remaining photovoltaic group string by corresponding each single group string control unit 1 respectively, to compensate target photovoltaic group
The power output of string, keeps total stable output power.
Central control unit 2 is coordinated to control concretely comprising the following steps for each single group string control unit 1 in the specific embodiment of the invention：
1. the working status parameter of the corresponding photovoltaic group string that each single group string control unit 1 sends is received；
2. whether the power output of each photovoltaic group string is judged respectively less than preset value, if it is, be judged to need compensating coefficient, and
3. the power output of compensation needed for calculating, after accumulation obtains the gross output of required compensation, be transferred to execution step；
3. by the gross output of required compensation according to assignment of allocation mode（Such as proportionate relationship）Distribute to remaining normal condition
Each photovoltaic group string, obtaining each photovoltaic group string of remaining normal condition needs the power output of adjustment；The method of salary distribution specifically can basis
Actual demand determination, such as can also use disproportional relation according to the characteristic of specific photovoltaic group string；
4. the power output according to the required adjustment for calculating sends control instruction to each correspondence single group string control unit 1, control
Corresponding photovoltaic group string adjusts power output.
In the present embodiment, central control unit 2 also includes monitoring module, and monitoring module includes what is be sequentially connected
State acquisition submodule, condition adjudgement submodule and early warning submodule, state acquisition submodule obtain each road photovoltaic group in real time
The status data of string, output to condition adjudgement submodule；Condition adjudgement submodule judges each road light according to the status data for receiving
The running status of volt group string, each single group string control unit 1, if determining in the presence of abnormal, sends early warning and believes by early warning submodule
Number.Status data is specifically as follows the data such as voltage, electric current and running status.Central control unit 2 receives each single group string control
It is analyzed after the status data that unit 1 sends, such as contrasts the data of each group string, each photovoltaic group string of assessment, the control of single group string is single
The running status of unit 1, determine in the presence of it is abnormal when send early warning signal, to remind potential danger to carry out early warning in advance, can be with
Realize that intelligent monitoring is managed, reduce the loss that such as equipment downtime is caused, the generated energy and system of effective guarantee photovoltaic system can
By property.
In the present embodiment, monitoring module also includes exception control submodule, for when early warning signal sends specified
Between when, control disconnects and judges there is abnormal photovoltaic group string, it is to avoid abnormality or failure are entered when early warning is processed in time
The development of one step, diffusion.
As shown in figure 4, the present embodiment collecting and distributing type photovoltaic power supply system includes multiple photovoltaic arrays, multiple above-mentioned intelligent powers
Control system and the inverter being connected with each intelligent power control system respectively, each photovoltaic array correspondence one intelligence of connection
Energy power control system, photovoltaic array Zhong Ge roads photovoltaic group string is connected respectively a list in the intelligent power control system
Group string control unit 1, each photovoltaic array, will by inverter by corresponding intelligent power control system controlled output power
Photovoltaic DC electricity is converted to exchange electricity output.
Using above-mentioned collecting and distributing type photovoltaic power supply system, the output of each photovoltaic group string can be based on by single group string control unit 1
Characteristic carries out independent dispersion control to each photovoltaic group string, it is to avoid the generated output mismatch that different photovoltaic group string output differences are caused,
Coordinate to control each single group string control unit 1 in combination with central control unit 2, each can be realized in photovoltaic generating system
The intelligent optimization matching and total tune control of photovoltaic group string, generating efficiency and reliability are high, when single group series controller unit 1 is adopted
When controlling the peak power of tracking photovoltaic group string with MPPT controller, overall optimal power generation performance is obtained in that.
Embodiment 2：
As shown in figure 5, the control method specific steps of the present embodiment collecting and distributing type photovoltaic intelligent power control system include：
1）The photovoltaic group string on correspondence road is carried out MPPT controls by each single group string control unit 1 respectively, controls each road photovoltaic group string
Maximum Power Output；
2）Central control unit 2 obtains the power output state of each road photovoltaic group string in real time, and is compared with preset state respectively
Compared with the power output of each road photovoltaic group string is adjusted by each single group string control unit 1 according to comparative result.
The present embodiment intelligent power control system is specific as described in Example 1, and intelligent power control system includes multiple single
Group string control unit 1 and the central control unit 2 being connected with each single group string control unit 1 respectively, the control of each single group string
Unit 1 corresponds to the power output for controlling photovoltaic group string all the way respectively, and central control unit 2 coordinates each single group string control unit of control
1 coordinating to control the power output of each road photovoltaic group string.
The present embodiment uses above-mentioned control method, and control realization is simple, and each photovoltaic group string can be made to export maximum work
Rate, it is ensured that the maximization of photovoltaic generating system power, while can be optimized according to the condition intelligent of each photovoltaic group string, coordinate each
The power output of photovoltaic group string, so as to realize photovoltaic DC generate electricity total optimization, improve system overall generating efficiency and can
By property.
In the present embodiment, step 2）In when the power output that there is target photovoltaic group string is less than preset value, it is specific respectively
The power output of remaining photovoltaic group string is adjusted by corresponding each single group string control unit 1, to compensate the defeated of target photovoltaic group string
Go out power, keep total stable output power.When exist photovoltaic group string break down or be blocked by shadow so that reduce or nothing
During method effective output, the power output of each road photovoltaic group string is adjusted by each single group string control unit 1, event occur to compensate
Power output needed for the photovoltaic group string for hindering or being blocked by shadow, can keep gross output stabilization so that each photovoltaic group string
Overall work is in optimum state.
As shown in fig. 6, step 2 in the present embodiment）Concretely comprise the following steps：
2.1）Central control unit 2 receives the working status parameter of the corresponding photovoltaic group string that each single group string control unit 1 sends；
2.2）Whether central control unit 2 judges the power output of each photovoltaic group string less than preset value respectively, if it is, being judged to
Compensating coefficient is needed, and calculates the required power output for compensating, after accumulation obtains the gross output of required compensation, be transferred to execution
Step 2.3）；
2.3）Central control unit 2 is by the gross output of required compensation according to assignment of allocation mode（Such as proportionate relationship）Distribution is extremely
Each photovoltaic group string of remaining normal condition, obtaining each photovoltaic group string of remaining normal condition needs the power output of adjustment；Distribution
Mode can specifically determine according to the actual requirements, such as can also use disproportional relation according to the characteristic of specific photovoltaic group string；
2.4）Central control unit 2 sends control instruction to each correspondence single group string according to the power output of the required adjustment for calculating
Control unit 1, controls corresponding photovoltaic group string adjustment power output.
In the present embodiment, also including condition monitoring step, concretely comprise the following steps：The status number of each road photovoltaic group string is obtained in real time
According to, the running status of each road photovoltaic group string is judged according to status data, if determining in the presence of abnormal, send early warning signal.State
Data are specifically as follows the data such as voltage, electric current and running status.Specifically by centralized Control in the present embodiment condition monitoring step
Unit 2 is analyzed after receiving the status data that each single group string control unit 1 sends, and such as contrasts the data of each group string, and assessment is each
The running status of photovoltaic group string, single group string control unit 1, early warning signal is sent when determining in the presence of exception, potential to remind
Danger carries out early warning in advance, it is possible to achieve intelligent monitoring is managed, and reduces the loss that such as equipment downtime is caused, effective guarantee photovoltaic
The generated energy and system reliability of system.
In the present embodiment, when condition monitoring step is additionally included in early warning signal and sends the specified time, control disconnects judgement and deposits
In abnormal photovoltaic group string step, it is to avoid abnormality or failure further develop, spread when early warning is processed in time.
Above-mentioned simply presently preferred embodiments of the present invention, not makees any formal limitation to the present invention.Although of the invention
It is disclosed above with preferred embodiment, but it is not limited to the present invention.Therefore, it is every without departing from technical solution of the present invention
Content, according to the technology of the present invention essence to any simple modification, equivalent variation and modification made for any of the above embodiments, all should fall
In the range of technical solution of the present invention protection.
Claims (10)
1. a kind of collecting and distributing type photovoltaic intelligent power control system, it is characterised in that including multiple single group string control units（1）And
Respectively with single group string control unit each described（1）The central control unit of connection（2）, each described single group string control unit
（1）The power output for controlling photovoltaic group string all the way, the central control unit are corresponded to respectively（2）Coordinate each single group string of control
Control unit（1）To coordinate the power output of photovoltaic group string described in each road of control.
2. collecting and distributing type photovoltaic intelligent power control system according to claim 1, it is characterised in that：The single group string control
Unit（1）Including MPPT controller, the peak power for controlling the tracking photovoltaic group string.
3. collecting and distributing type photovoltaic intelligent power control system according to claim 2, it is characterised in that：The MPPT controller
Including power tube drive circuit, voltage/current sample circuit and processor, described in the voltage/current sampling circuit samples
Input voltage/the electric current and output voltage/electric current of photovoltaic group string, export to processor, and the processor is according to receiving
Sampled signal, by the power tube drive circuit driving power pipe, controls the photovoltaic group string Maximum Power Output.
4. the collecting and distributing type photovoltaic intelligent power control system according to claim 1 or 2 or 3, it is characterised in that：The concentration
Control unit（2）Including power coordination control module, the power coordination control module obtains each photovoltaic group string respectively
Power output state, and be compared with preset state respectively, according to comparative result by each single group string control unit
（1）Adjust the power output of each road photovoltaic group string.
5. collecting and distributing type photovoltaic intelligent power control system according to claim 4, it is characterised in that：When there is target photovoltaic
When the power output of group string is less than preset value, specifically respectively by corresponding each single group string control unit（1）Adjust remaining
The power output of photovoltaic group string, to compensate the power output of target photovoltaic group string.
6. collecting and distributing type photovoltaic intelligent power control system according to claim 4, it is characterised in that：The centralized Control list
Unit（2）Also include monitoring module, the monitoring module includes the state acquisition submodule, the condition adjudgement that are sequentially connected
Submodule and early warning submodule, the state acquisition submodule obtain the status data of each road photovoltaic group string in real time, and output is extremely
The condition adjudgement submodule；The condition adjudgement submodule according to receive the status data judge each road photovoltaic group string,
Each single group string control unit（1）Running status, if determining in the presence of abnormal, early warning is sent by the early warning submodule and is believed
Number；The monitoring module also includes exception control submodule, for when the early warning signal sends the specified time, controlling
Disconnect and judge there is abnormal photovoltaic group string.
7. a kind of collecting and distributing type photovoltaic power supply system, it is characterised in that including multiple photovoltaic arrays, multiple as in claim 1~6
Intelligent power control system described in any one and the inverter being connected with intelligent power control system each described respectively,
Each described photovoltaic array correspondence one described intelligent power control system of connection, the photovoltaic array Zhong Ge roads photovoltaic group string point
A single group string control unit in the intelligent power control system Dui Ying not connected（1）, each described photovoltaic array is by right
The intelligent power control system controlled output power answered, by photovoltaic DC electricity is converted to alternating current defeated by the inverter
Go out.
8. using the control method of the collecting and distributing type photovoltaic intelligent power control system described in any one in claim 1~6, its
It is characterised by, step includes：
1）Each single group string control unit（1）The photovoltaic group string on correspondence road is carried out into MPPT controls respectively, each road photovoltaic group is controlled
String Maximum Power Output；
2）The central control unit（2）Obtain the power output state of each road photovoltaic group string in real time, and respectively with preset state
It is compared, according to comparative result by each single group string control unit（1）Adjust the power output of each road photovoltaic group string.
9. control method according to claim 8, it is characterised in that the step 2）In when there is target photovoltaic group string
When power output is less than preset value, specifically respectively by corresponding each single group string control unit（1）Adjust remaining photovoltaic group
The power output of string, to compensate the power output of target photovoltaic group string.
10. control method according to claim 8 or claim 9, it is characterised in that also including condition monitoring step, specific steps
For：The status data of each road photovoltaic group string is obtained in real time, and the running status of each road photovoltaic group string is judged according to the status data,
If determining in the presence of abnormal, early warning signal is sent；When the condition monitoring step is additionally included in the early warning signal and sends specified
Between when, control disconnects and judges there is abnormal photovoltaic group string step.
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