CN107943194A - Photovoltaic group string, series control method and device thereof, and photovoltaic system - Google Patents
Photovoltaic group string, series control method and device thereof, and photovoltaic system Download PDFInfo
- Publication number
- CN107943194A CN107943194A CN201711015589.2A CN201711015589A CN107943194A CN 107943194 A CN107943194 A CN 107943194A CN 201711015589 A CN201711015589 A CN 201711015589A CN 107943194 A CN107943194 A CN 107943194A
- Authority
- CN
- China
- Prior art keywords
- photovoltaic
- photovoltaic module
- unit
- environment temperature
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000015572 biosynthetic process Effects 0.000 claims description 112
- 230000007613 environmental effect Effects 0.000 claims description 32
- 238000001514 detection method Methods 0.000 claims description 14
- 230000008859 change Effects 0.000 claims description 7
- 238000005755 formation reaction Methods 0.000 claims 21
- 230000000712 assembly Effects 0.000 abstract 1
- 238000000429 assembly Methods 0.000 abstract 1
- 230000000875 corresponding effect Effects 0.000 description 53
- 238000013461 design Methods 0.000 description 16
- 238000010586 diagram Methods 0.000 description 14
- 230000001276 controlling effect Effects 0.000 description 12
- 230000006870 function Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000005286 illumination Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002596 correlated effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention provides a photovoltaic string, a series control method and a series control device thereof, and a photovoltaic system, wherein the photovoltaic string comprises: at least two photovoltaic module units; each photovoltaic assembly unit of the at least two photovoltaic assembly units comprises at least one photovoltaic assembly, so that the number of the photovoltaic assemblies connected to the photovoltaic system in the photovoltaic group string can be changed by controlling whether at least one photovoltaic assembly unit of the at least two photovoltaic assembly units is connected to the photovoltaic system or not. The scheme provided by the invention can realize the adjustability of the serial number of the photovoltaic components of the photovoltaic group string.
Description
Technical field
The present invention relates to control field, more particularly to the series control side of a kind of photovoltaic string formation and its photovoltaic module unit
Method, device and photovoltaic system.
Background technology
In existing photovoltaic system, photovoltaic string formation is composed in series by N block photovoltaic modulies first, photovoltaic string formation carries out parallel connection again
Photovoltaic system is formed, according to《Photo-voltaic power generation station design specification》(GB50797-2012), the serial number N sides of determining of photovoltaic module
Formula is as follows, and maximum open circuit voltage of the photovoltaic module between local daytime under extreme temperature is no more than the maximum of equipment used in system
Allow the excursion of the maximum power operating voltage of voltage and photovoltaic string formation should be in the maximal power tracing of inverter
(MPPT) in voltage range：
In formula：
kv--- the open-circuit voltage temperature coefficient of photovoltaic module；
kv, --- the operating voltage temperature coefficient of photovoltaic module；
The serial number (N round numbers) of N --- photovoltaic module；
T --- the limit low temperature (DEG C) under photovoltaic module operating condition；
T ' --- the limit high temperature (DEG C) under photovoltaic module operating condition；
Vdcmax--- the maximum DC input voitage (V) that inverter allows；
Vmpptmin--- inverter MPPT voltage max (V)；
Vmpptmax--- inverter MPPT voltage minimums (V)；
Voc--- the open-circuit voltage (V) of photovoltaic module；
Vpm--- the operating voltage (V) of photovoltaic module；
The maximum permissible voltage V of equipment used in conventional photovoltaic systemdcmaxFor 1000V or 1500V；Photovoltaic module is opened
Road voltage temperature coefficient kvWith the operating voltage temperature coefficient k ' of photovoltaic modulevFor negative value, definite value may be generally viewed as；Photovoltaic module
Open-circuit voltage Voc, photovoltaic module operating voltage VpmDepending on the model of selected photovoltaic module.Therefore photovoltaic system is set
During meter, after selected component model determines, the serial number N of photovoltaic module mainly the operating temperature t by photovoltaic module,
T ' influences.Limit low temperature t under photovoltaic module operating condition takes the historical low temperature of infield, generally less than 25 DEG C, therefore t
It is worth smaller, the maximum of N is smaller；Limit high temperature t ' under photovoltaic module operating condition takes the historical high temperature of infield to add
Upper 25 DEG C (empirical values), generally higher than 25 DEG C, therefore t ' values are smaller, the minimum value of N is bigger；
Larger, the average air in summer is being differed except extratropical most area, historical high temperature and the lowest temperature
Temperature is significantly higher than winter, the string formation number N of photovoltaic system design is satisfied with summer, because the low temperature in winter must reduce N, so as to be
System meets design requirement.In the big place of day and night temperature, the string formation number that photovoltaic system designs is satisfied with when daylight is preferable
N, because the low temperature in evening must reduce N, so that system meets design requirement.In the photovoltaic system design of specific project, photovoltaic
The reduction of string formation number N values so that under identical photovoltaic system installed capacity, photovoltaic string formation quantity increase so that confluence cable, straight
Stream increases with electrical component usage amount and installing engineering amount.In addition, photovoltaic module gradually develops to maximization so that monolithic photovoltaic
The open-circuit voltage V of componentoc, operating voltage VpmIncrease, N are worth value range to diminish, and in Tibet etc., local day and night temperature is larger
So that N is worth value range further to reduce, some projects are difficult to obtain the N values for meeting photovoltaic system design requirement, limit
The use of photovoltaic, also to the requirement for proposing higher of contravariant equipment.
The definite method of existing photovoltaic string formation, using air and geodata, the series connection of accurate definite photovoltaic module
Quantity, but the photovoltaic module serial number of its photovoltaic string formation is worth to be definite, same photovoltaic system light under different weather ambient conditions
It is non-adjustable to lie prostrate component serial number, can not realize that photovoltaic system is optimized according to the realization of Changes in weather and export.
The content of the invention
The defects of it is a primary object of the present invention to overcome the above-mentioned prior art, there is provided a kind of photovoltaic string formation and its photovoltaic group
The series control method, apparatus and photovoltaic system of part unit, to solve not realizing the photovoltaic group of photovoltaic string formation in the prior art
Part serial number is definite value and nonadjustable problem.
One aspect of the present invention provides a kind of photovoltaic string formation, including：At least two photovoltaic module units；At least two light
Each photovoltaic module unit in volt assembly unit includes at least one piece of photovoltaic module, to realize by controlling described at least two
Whether at least one photovoltaic module unit in photovoltaic module unit accesses photovoltaic system, can change and be connect in the photovoltaic string formation
Enter the quantity of the photovoltaic module of photovoltaic system.
Alternatively, photovoltaic module included by each photovoltaic module unit at least two photovoltaic modulies unit
Quantity is determined according to the corresponding photovoltaic module maximum serial number of the first specific environment temperature, to realize in different environment temperatures
Under, the photovoltaic module of varying number in the photovoltaic string formation is accessed photovoltaic system；The first specific environment temperature is included extremely
Few two environment temperatures, the quantity of included environment temperature is wrapped with the photovoltaic string formation in the first specific environment temperature
The quantity of the photovoltaic module unit included is corresponding.
Alternatively, at least two photovoltaic modulies unit, photovoltaic module included by a photovoltaic module unit
Quantity environment temperature minimum at least two environment temperature included by the first specific environment temperature is corresponding
Photovoltaic module maximum serial number；The number of the photovoltaic module included by each photovoltaic module unit in remaining photovoltaic module unit
Measure every after at least two environment temperature according to included by the first specific environment temperature sorts according to temperature height
The difference of the corresponding photovoltaic module maximum serial number of two adjacent environment temperatures determines.
Alternatively, the photovoltaic string formation includes：First photovoltaic module unit, the second photovoltaic module unit, the 3rd photovoltaic group
Part unit and the 4th photovoltaic module unit；The first specific environment temperature includes first environment temperature, second environment temperature, the
Three environment temperatures and the 4th environment temperature；The first environment temperature is local historical low temperature；And/or second ring
Border temperature is the local lowest temperature on daytime in winter；And/or the 3rd environment temperature be local spring and/or daytime in autumn most
Low temperature；And/or the 4th environment temperature is the local summer day lowest temperature.
Alternatively, the first photovoltaic module unit is composed in series by Nmax1 block photovoltaic modulies, second photovoltaic module
Unit is composed in series by Δ N1 block photovoltaic modulies, and the 3rd photovoltaic module unit is composed in series by Δ N2 block photovoltaic modulies, institute
The 4th photovoltaic module unit is stated to be composed in series by Δ N3 block photovoltaic modulies；Nmax1 is corresponding first photovoltaic of first environment temperature
Component maximum serial number；Δ N1 is the corresponding second photovoltaic module maximum serial number Nmax2 of second environment temperature and first environment
The difference of the corresponding first photovoltaic module maximum serial number Nmax1 of temperature, wherein, first environment temperature is less than second environment temperature；
Δ N2 is the corresponding 3rd photovoltaic module maximum serial number Nmax3 of the 3rd environment temperature the second light corresponding with second environment temperature
The difference of component maximum serial number Nmax2 is lied prostrate, wherein, second environment temperature is less than the 3rd environment temperature；Δ N3 is the 4th environment temperature
Spend corresponding 4th photovoltaic module maximum serial number Nmax4 photovoltaic module maximum serial number corresponding with the 3rd environment temperature
The difference of Nmax3, wherein, the 3rd environment temperature is less than the 4th environment temperature.
Alternatively, the photovoltaic string formation further includes switch, for controlling at least two photovoltaic modulies unit extremely
Whether a few photovoltaic module unit accesses photovoltaic system, to change the photovoltaic module that photovoltaic system is accessed in the photovoltaic string formation
Quantity.
Alternatively, described switch includes at least two contacts, at least one photovoltaic module unit in the photovoltaic string formation
With at least one contact portion of the switch, described switch can be by phase in the photovoltaic string formation when closing at different contacts
The photovoltaic module unit access photovoltaic system answered.
Another aspect of the present invention provides a kind of series connection of the photovoltaic module unit for foregoing any photovoltaic string formation
Control method, wherein, the photovoltaic module included by each photovoltaic module unit at least two photovoltaic modulies unit
Quantity is determined according to the corresponding photovoltaic module maximum serial number of the first specific environment temperature；The first specific environment temperature bag
Include at least two environment temperatures, the quantity of included environment temperature and the photovoltaic string formation in the first specific environment temperature
The quantity of included photovoltaic module unit is corresponding；The described method includes：Detect current environmental temperature；Worked as according to what is detected
Whether at least one photovoltaic module unit at least two photovoltaic module units described in preceding environment temperature control accesses photovoltaic system
System.
Alternatively, at least one at least two photovoltaic modulies unit is controlled according to the current environmental temperature detected
Whether a photovoltaic module unit accesses photovoltaic system, including：Compare the size of current environmental temperature and the second specific environment temperature
Relation, the second specific environment temperature include at least one environment temperature in the first specific environment temperature；According to institute
Magnitude relationship is stated to determine to access the photovoltaic module unit of photovoltaic system at least two photovoltaic modulies unit；What control determined
The photovoltaic module unit access photovoltaic system of photovoltaic system is accessed at least two photovoltaic modulies unit.
Alternatively, at least two photovoltaic modulies unit, photovoltaic module included by a photovoltaic module unit
The quantity corresponding photovoltaic of environment temperature minimum at least two environment temperature included by the first specific environment temperature
Component maximum serial number；The quantity root of the photovoltaic module included by each photovoltaic module unit in remaining photovoltaic module unit
At least two environment temperature included by according to the first specific environment temperature is according to each two after temperature height sequence
The difference of the corresponding photovoltaic module maximum serial number of adjacent environment temperature determines；Before current environmental temperature is detected, also
Including：Detect current irradiation level；When it is zero to detect irradiation level, photovoltaic group at least two photovoltaic modulies unit is controlled
Number of packages amount accesses photovoltaic system for the photovoltaic module unit of the corresponding photovoltaic module maximum serial number of the minimum environment temperature
System, remaining photovoltaic module unit do not access photovoltaic system；When detecting that irradiation level is more than zero, controlled according to current environmental temperature
Whether at least one photovoltaic module unit at least two photovoltaic modulies unit accesses photovoltaic system.
Another aspect of the invention provides a kind of series connection of the photovoltaic module unit for foregoing any photovoltaic string formation
Control device, wherein, the photovoltaic module included by each photovoltaic module unit at least two photovoltaic modulies unit
Quantity is determined according to the corresponding photovoltaic module maximum serial number of the first specific environment temperature；The first specific environment temperature bag
Include at least two environment temperatures, the quantity of included environment temperature and the photovoltaic string formation in the first specific environment temperature
The quantity of included photovoltaic module unit is corresponding；Described device includes：Temperature detecting unit, for detecting current environment temperature
Degree；Control unit, the current environmental temperature for being detected according to the temperature detecting unit control at least two photovoltaic
Whether at least one photovoltaic module unit in assembly unit accesses photovoltaic system.
Alternatively, described control unit is further used for：Compare the big of current environmental temperature and the second specific environment temperature
Small relation, the second specific environment temperature include at least one environment temperature in the first specific environment temperature；According to
The magnitude relationship determines to access the photovoltaic module unit of photovoltaic system at least two photovoltaic modulies unit；Control determines
At least two photovoltaic modulies unit in access photovoltaic system photovoltaic module unit access photovoltaic system.
Alternatively, at least two photovoltaic modulies unit, photovoltaic module included by a photovoltaic module unit
The quantity corresponding photovoltaic of environment temperature minimum at least two environment temperature included by the first specific environment temperature
Component maximum serial number；The quantity root of the photovoltaic module included by each photovoltaic module unit in remaining photovoltaic module unit
At least two environment temperature included by according to the first specific environment temperature is according to each two after temperature height sequence
The difference of the corresponding photovoltaic module maximum serial number of adjacent environment temperature determines；Described device further includes：Irradiation level detects
Unit, for detecting current irradiation level；Described control unit is further used for：Detected currently in the irradiation level detection unit
When irradiation level is zero, it is the minimum environment temperature pair to control photovoltaic module quantity at least two photovoltaic modulies unit
The photovoltaic module unit access photovoltaic system for the photovoltaic module maximum serial number answered, remaining photovoltaic module unit do not access photovoltaic
System；
When the irradiation level detection unit detects that current irradiation level is more than zero, according to controlling current environmental temperature
Whether at least one photovoltaic module unit at least two photovoltaic module units accesses photovoltaic system.
Further aspect of the present invention provides a kind of photovoltaic system, including at least one set of foregoing any photovoltaic string formation.
Alternatively, the photovoltaic system further includes foregoing any series control device, the series control device
For carrying out series control to the photovoltaic module unit of photovoltaic string formation described in each group in the photovoltaic system.
Alternatively, each group of photovoltaic string formation at least one set of photovoltaic string formation further includes switch；By described in control
Switch can carry out series control to the photovoltaic module unit of photovoltaic string formation described in each group in the photovoltaic system.
Technique according to the invention scheme, the photovoltaic module quantity of photovoltaic system is accessed in photovoltaic string formation to be changed, real
The adjustable of the photovoltaic module serial number of photovoltaic string formation is showed；And the present invention can be according to environment temperature to being accessed in photovoltaic string formation
The photovoltaic module quantity of photovoltaic system is adjusted so that the serial number of photovoltaic module disclosure satisfy that photovoltaic system design requirement
At the same time, moreover it is possible to realize the maximization access of photovoltaic string formation；Reduce the throwing of the direct current cables, controller switching equipment in photovoltaic system project
Enter, reduce quantities, realize the maximization of photovoltaic system generated energy, improve the flexibility of system design so that system is set
Meter more agrees with actual working environment, reduces dependence of the system design for contravariant equipment, eliminates region to photovoltaic system
The limitation of design.
Brief description of the drawings
Attached drawing described herein is used for providing a further understanding of the present invention, forms the part of the present invention, this hair
Bright schematic description and description is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the structure diagram of an embodiment of photovoltaic string formation provided by the invention；
Fig. 2 is the structure diagram of a specific embodiment of photovoltaic string formation provided by the invention；
Fig. 3 is an embodiment of the series control method of the photovoltaic module unit of the photovoltaic string formation provided by the invention
Method schematic diagram；
Fig. 4 is another embodiment of the series control method of the photovoltaic module unit of the photovoltaic string formation provided by the invention
Method schematic diagram；
Fig. 5 is the flow diagram for the photovoltaic module quantity that photovoltaic system is accessed in control photovoltaic string formation as shown in Figure 2；
Fig. 6 is an embodiment of the series control device of the photovoltaic module unit of the photovoltaic string formation provided by the invention
Structure diagram；
Fig. 7 is another embodiment of the series control device of the photovoltaic module unit of the photovoltaic string formation provided by the invention
Structure diagram；
Fig. 8 is to carry out series connection control to the photovoltaic module unit of photovoltaic string formation by series control device according to the present invention
The schematic diagram of system.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the specific embodiment of the invention and
Technical solution of the present invention is clearly and completely described in corresponding attached drawing.Obviously, described embodiment is only the present invention one
Section Example, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not doing
Go out all other embodiments obtained under the premise of creative work, belong to the scope of protection of the invention.
It should be noted that term " first " in description and claims of this specification and above-mentioned attached drawing, "
Two " etc. be for distinguishing similar object, without for describing specific order or precedence.It should be appreciated that so use
Data can exchange in the appropriate case, so as to the embodiment of the present invention described herein can with except illustrating herein or
Order beyond those of description is implemented.In addition, term " comprising " and " having " and their any deformation, it is intended that cover
Cover it is non-exclusive include, be not necessarily limited to for example, containing the process of series of steps or unit, method, system, product or equipment
Those steps or unit clearly listed, but may include not list clearly or for these processes, method, product
Or the intrinsic other steps of equipment or unit.
According to photovoltaic system design standard formula, the maximum serial number of photovoltaic module is in photovoltaic system：
Wherein,Expression takesTwo
Smaller value in value；T is the minimum environment temperature (DEG C) under photovoltaic system operating condition, for a certain photovoltaic system, photovoltaic group
After part and contravariant equipment are selected, Nmax is positively correlated with t.
Fig. 1 is the structure diagram of an embodiment of photovoltaic string formation provided by the invention.
As shown in Figure 1, photovoltaic string formation 10 includes at least two photovoltaic module units 11；The photovoltaic string formation 10 by it is described extremely
Few two photovoltaic module units 11 are composed in series；Each photovoltaic module unit at least two photovoltaic modulies unit includes
At least one piece of photovoltaic module；Each photovoltaic module unit 11 is composed in series by least one piece of photovoltaic module, by controlling
Whether at least one photovoltaic module unit stated at least two photovoltaic module units 11 accesses photovoltaic system, can change described
The quantity of the photovoltaic module of photovoltaic system is accessed in photovoltaic string formation.
Wherein, the photovoltaic module included by each photovoltaic module unit 11 at least two photovoltaic modulies unit 11
Quantity determined according to the corresponding photovoltaic module maximum serial number of the first specific environment temperature, with realize in different environment temperature
Under degree, the photovoltaic module of varying number in the photovoltaic string formation 10 is set to access photovoltaic system, the first specific environment temperature bag
Include at least two environment temperatures, the quantity of included environment temperature and the photovoltaic string formation in the first specific environment temperature
The quantity of included photovoltaic module unit is corresponding.
Specifically, at least two photovoltaic modulies unit 11, the photovoltaic group included by a photovoltaic module unit 11
The quantity of part environment temperature pair minimum at least two environment temperature included by the first specific environment temperature
The photovoltaic module maximum serial number answered；The photovoltaic included by each photovoltaic module unit 11 in remaining photovoltaic module unit 11
At least two environment temperature of the quantity of component according to included by the first specific environment temperature is arranged according to temperature height
The difference of the adjacent corresponding photovoltaic module maximum serial number of environment temperature of each two after sequence determines, in the photovoltaic string formation
Including photovoltaic module total quantity be equal at least two environment temperature in the corresponding light of the highest environment temperature of temperature value
Lie prostrate component maximum serial number.Wherein, the temperature of at least two environment temperature included by the first specific environment temperature
Degree height is different；For example, the first specific environment temperature includes t1, t2, t3, t4, wherein, t1 ＜ t2 ＜ t3 ＜ t4,
The corresponding photovoltaic module maximum serial numbers of t1 are N1；The corresponding photovoltaic module maximum serial numbers of t2 are N2；The corresponding photovoltaic groups of t3
Part maximum serial number is N3；The corresponding photovoltaic module maximum serial numbers of t4 are N4, then photovoltaic string formation includes common N4 blocks photovoltaic module,
The photovoltaic module quantity that then each photovoltaic module unit includes is respectively N1, N2-N1, N3-N2, N4-N3.By control it is described its
Whether at least one photovoltaic module unit in remaining light volt assembly unit 11 accesses the photovoltaic system, can change the photovoltaic
The quantity of the photovoltaic module of photovoltaic system is accessed in string formation 10, to realize under different environment temperatures, makes the photovoltaic string formation
The photovoltaic module access photovoltaic system of middle varying number.
A specific embodiment according to the present invention, the first specific environment temperature include first environment temperature, second
Environment temperature, the 3rd environment temperature and the 4th environment temperature；The first environment temperature is local historical low temperature；And/or
The second environment temperature is the local lowest temperature on daytime in winter；And/or the 3rd environment temperature be local spring and/or
Daytime in autumn the lowest temperature；And/or the 4th environment temperature is the local summer day lowest temperature.
Fig. 2 is the structure diagram of a specific embodiment of photovoltaic string formation provided by the invention.As shown in Fig. 2, the light
Volt string formation 10 includes：First photovoltaic module unit 111, the second photovoltaic module unit 112, the 3rd photovoltaic module unit 113 and
Four photovoltaic module units 114；The first photovoltaic module unit 111 is composed in series by Nmax1 block photovoltaic modulies, second light
Volt assembly unit 112 is composed in series by Δ N1 block photovoltaic modulies, and the 3rd photovoltaic module unit 113 is by Δ N2 block photovoltaic modulies
It is composed in series, the 4th photovoltaic module unit is composed in series by Δ N3 block photovoltaic modulies.
As t=t1, can be calculated corresponding photovoltaic module maximum serial number by formula (3) is Nmax1；Similarly, t is worked as
During=t2, corresponding photovoltaic module maximum serial number is Nmax2；As t=t3, corresponding photovoltaic module maximum serial number is
Nmax3；As t=t4, corresponding photovoltaic module maximum serial number is Nmax4, because t1 ＜ t2 ＜ t3 ＜ t4, therefore Nmax1 ＜
Nmax2 ＜ Nmax3 ＜ Nmax4；Photovoltaic string formation includes common Nmax4 blocks photovoltaic module, and Nmax1 is corresponding for first environment temperature t1
First photovoltaic module maximum serial number；Δ N1 for the corresponding second photovoltaic module maximum serial number Nmax2 of second environment temperature with
The difference of the corresponding first photovoltaic module maximum serial number Nmax1 of first environment temperature, Δ N1=Nmax2-Nmax1, wherein, first
Environment temperature is less than second environment temperature, i.e. t1 ＜ t2；Δ N2 is maximum for corresponding 3rd photovoltaic modulies of the 3rd environment temperature t3
The difference of the corresponding second photovoltaic module maximum serial number Nmax2 of serial number Nmax3 and second environment temperature t2, Δ N2=Nmax3-
Nmax2, wherein, second environment temperature is less than the 3rd environment temperature, i.e. t2 ＜ t3；Δ N3 is the 4th environment temperature t4 corresponding the
The difference of the corresponding photovoltaic module maximum serial number Nmax3 of four photovoltaic module maximum serial number Nmax4 and the 3rd environment temperature t3, Δ
N3=Nmax4-Nmax3, wherein, the 3rd environment temperature is less than the 4th environment temperature, i.e. t3 ＜ t4.Nmax1、Nmax2、Nmax3、
Nmax4 is respectively corresponding photovoltaic module maximum when the environment temperature being calculated according to above-mentioned formula (3) is t1, t2, t3, t4
Serial number.
Alternatively, based on above-mentioned any embodiment, the photovoltaic string formation 10 further includes switch K (referring to shown in Fig. 2), uses
In controlling whether at least one photovoltaic module unit at least two photovoltaic modulies unit 11 accesses photovoltaic system, to change
Become in the photovoltaic string formation quantity for the photovoltaic module for accessing photovoltaic system.The switch K can include at least two contacts, institute
State at least one contact portion of at least one photovoltaic module unit and the switch in photovoltaic string formation, the switch K closures
Corresponding photovoltaic module unit 11 in the photovoltaic string formation 10 can be accessed photovoltaic system at different contacts.
For example, as shown in Fig. 2, switch K closure contact 1,2,3 and disconnect four positions, the second photovoltaic module unit
112 Δ N1 blocks photovoltaic module is connected with switching the contact 1 of K, the Δ N2 blocks photovoltaic module of the 3rd photovoltaic module unit 113, the
The Δ N3 blocks photovoltaic module of four photovoltaic module units 114 is connected with switching contact 2, the contact 3 of K respectively.Wherein, when K is disconnected, the
One photovoltaic module unit 111, the second photovoltaic module unit 112, the 3rd photovoltaic module unit 113 and the 4th photovoltaic module unit
114 series connection access photovoltaic systems, and the photovoltaic module serial number that photovoltaic system is accessed in the photovoltaic string formation 10 is Nmax1+ Δs N1+
Δ N2+ Δ N3, i.e. Nmax4；When K is closed at contact 1, the first photovoltaic module unit 111,112 and of the second photovoltaic module unit
3rd photovoltaic module unit 113 series connection access photovoltaic system, the 4th photovoltaic module unit 114 do not access photovoltaic system, the light
The photovoltaic module serial number for lying prostrate access photovoltaic system in string formation 10 is Nmax1+ Δ N1+ Δ N2, i.e. Nmax3；K closes at contact 2
During place, the first photovoltaic module unit 111 and the second photovoltaic module unit 112 series connection access photovoltaic system, the 3rd photovoltaic module list
113 and the 4th photovoltaic module unit 114 of member does not access photovoltaic system, and the photovoltaic group of photovoltaic system is accessed in the photovoltaic string formation 10
Part serial number is Nmax1+ Δ N1, i.e. Nmax2；When K is closed at contact 3, only the first photovoltaic module unit 111 access photovoltaic system
System, remaining photovoltaic module unit do not access photovoltaic system, and the photovoltaic module series connection of photovoltaic system is accessed in the photovoltaic string formation 10
Number is Nmax1.
The present invention also provides a kind of series control method of the photovoltaic module unit for foregoing any photovoltaic string formation.
Fig. 3 is the method signal of an embodiment of the series control method of the photovoltaic module unit of the photovoltaic string formation provided by the invention
Figure.As shown in figure 3, the method includes at least step S210 and step S220.
The quantity root of the photovoltaic module included by each photovoltaic module unit at least two photovoltaic modulies unit
Determined according to the corresponding photovoltaic module maximum serial number of the first specific environment temperature；The first specific environment temperature is included at least
Two environment temperatures, in the first specific environment temperature included by the quantity of included environment temperature and the photovoltaic string formation
Photovoltaic module unit quantity it is corresponding.
Step S210, detects current environmental temperature.
Specifically, current environmental temperature can be detected by temperature sensor, the temperature sensing implement body can be set
At the back side of photovoltaic module, i.e., on the backboard of photovoltaic module.
Step S220, controls at least two photovoltaic modulies unit at least according to the current environmental temperature detected
Whether one photovoltaic module unit accesses photovoltaic system.
Specifically, the magnitude relationship of current environmental temperature and the second specific environment temperature, second specific environment are compared
Temperature includes at least one environment temperature in the first specific environment temperature；According to determining the magnitude relationship at least
The photovoltaic module unit of photovoltaic system is accessed in two photovoltaic module units；The definite at least two photovoltaic modulies list of control
The photovoltaic module unit access photovoltaic system of photovoltaic system is accessed in member.
Fig. 4 is another embodiment of the series control method of the photovoltaic module unit of the photovoltaic string formation provided by the invention
Method schematic diagram.As shown in figure 4, the method includes the steps S210 and step S220, step is further included before step S210
Rapid S201 and step S202.
In at least two photovoltaic modulies unit, the quantity of the photovoltaic module included by a photovoltaic module unit is the
The corresponding photovoltaic module of minimum environment temperature is maximum at least two environment temperature included by one specific environment temperature
Serial number；The quantity of the photovoltaic module included by each photovoltaic module unit in remaining photovoltaic module unit is according to described
At least two environment temperature included by one specific environment temperature is according to the adjacent ring of each two after temperature height sequence
The difference of the corresponding photovoltaic module maximum serial number of border temperature determines.
Step S201, detects current irradiation level.
Specifically, current irradiation level (intensity of illumination) can be detected by irradiance sensor.Detecting that irradiation level is
When zero, step S202 is performed.When detecting that irradiation level is more than zero, then step S210 and step S220 are performed, front ring is worked as in detection
Border temperature, and at least one photovoltaic at least two photovoltaic modulies unit is controlled according to the current environmental temperature detected
Whether assembly unit accesses photovoltaic system.
Step S202, when it is zero to detect current irradiation level, controls photovoltaic at least two photovoltaic modulies unit
Component count accesses photovoltaic for the photovoltaic module unit of the corresponding photovoltaic module maximum serial number of the minimum environment temperature
System, remaining photovoltaic module unit do not access photovoltaic system.
When it is zero to detect current irradiation level, the quantity for making the photovoltaic module of the photovoltaic string formation access photovoltaic system is
The corresponding photovoltaic module maximum serial number of minimum environment temperature in the first specific environment temperature, at this time the photovoltaic group
The photovoltaic module serial number concatenated into photovoltaic system is minimum.
Fig. 5 is the flow diagram for the photovoltaic module quantity that photovoltaic system is accessed in control photovoltaic string formation as shown in Figure 2.
As shown in figure 5, first, detecting current irradiation level (intensity of illumination), if current irradiation level is equal to zero, controlling switch K is connected to
Contact 3, the quantity for making to access the photovoltaic module of photovoltaic system in the photovoltaic string formation is minimum value；If current irradiation level is more than
Zero, the current environmental temperature t of photovoltaic component operation is detected, the environment temperature t controls to work according to the photovoltaic module detected are opened
K is closed, compares the magnitude relationship of t and t2, t3, t4, that is, judges the scope of t values；As t ＜ t2, switch K is connected to contact 3；Work as t2
＜ t ＜ t3, switch K are connected to contact 2；As t2 ＜ t ＜ t3, switch K is connected to contact 1；As t ＞ t3, K is disconnected.
The present invention also provides a kind of series control device of the photovoltaic module unit for foregoing any photovoltaic string formation.
Fig. 6 is the structural representation of an embodiment of the series control device of the photovoltaic module unit of the photovoltaic string formation provided by the invention
Figure.
The quantity root of the photovoltaic module included by each photovoltaic module unit at least two photovoltaic modulies unit
Determined according to the corresponding photovoltaic module maximum serial number of the first specific environment temperature；The first specific environment temperature is included at least
Two environment temperatures, in the first specific environment temperature included by the quantity of included environment temperature and the photovoltaic string formation
Photovoltaic module unit quantity it is corresponding.As shown in fig. 6, described device 20 includes：Temperature detecting unit 210 and control unit
220。
Temperature detecting unit 210 is used to detect current environmental temperature；Control unit 220 is used for according to the temperature detection list
The current environmental temperature that member 210 detects controls at least one photovoltaic module unit at least two photovoltaic modulies unit
Whether photovoltaic system is accessed.When the photovoltaic string formation further includes switch, described control unit 220 is by controlling the switch K
Control whether at least one photovoltaic module unit at least two photovoltaic modulies unit accesses photovoltaic system.The temperature
Detection unit 210 is specifically as follows temperature sensor, and the temperature sensor can be arranged on the backboard of photovoltaic module.It is described
Control unit 220 is specifically as follows controller.
Specifically, described control unit 220 compares the magnitude relationship of current environmental temperature and the second specific environment temperature, institute
Stating the second specific environment temperature includes at least one environment temperature in the first specific environment temperature；Closed according to the size
System determines to access the photovoltaic module unit of photovoltaic system at least two photovoltaic modulies unit；Control determine it is described at least
The photovoltaic module unit access photovoltaic system of photovoltaic system is accessed in two photovoltaic module units.For example, photovoltaic as shown in Figure 2
String formation, the current environmental temperature t that the photovoltaic module that control unit 220 is detected according to temperature sensor works and t2, t3, t4
Magnitude relationship controlling switch K, wherein, as t ＜ t2, switch K is connected to contact 3；When t2 ＜ t ＜ t3, switch K are connected to contact
2；As t2 ＜ t ＜ t3, switch K is connected to contact 1；As t ＞ t3, K is disconnected.
According to another embodiment of the present invention, at least two photovoltaic modulies unit, a photovoltaic module unit institute
Including the quantity of photovoltaic module be ring minimum at least two environment temperature included by the first specific environment temperature
The corresponding photovoltaic module maximum serial number of border temperature；Included by each photovoltaic module unit in remaining photovoltaic module unit
At least two environment temperature of the quantity of photovoltaic module according to included by the first specific environment temperature is according to temperature height
The difference of the adjacent corresponding photovoltaic module maximum serial number of environment temperature of each two after low sequence determines.
Fig. 7 is another embodiment of the series control device of the photovoltaic module unit of the photovoltaic string formation provided by the invention
Structure diagram.Described device further includes：Irradiation level detection unit 230, for detecting current irradiation level；The irradiation level inspection
Survey unit 230 and be specifically as follows irradiance sensor.
Described control unit 220 is further used for：Detect that current irradiation level is zero in the irradiation level detection unit 230
When, it is the corresponding photovoltaic group of the minimum environment temperature to control photovoltaic module quantity at least two photovoltaic modulies unit
The photovoltaic module unit access photovoltaic system of part maximum serial number, remaining photovoltaic module unit do not access photovoltaic system；Institute
State irradiation level detection unit 230 detect current irradiation level be more than zero when, according to current environmental temperature control described at least two
Whether at least one photovoltaic module unit in photovoltaic module unit accesses photovoltaic system.
Fig. 8 is to carry out series connection control to the photovoltaic module unit of photovoltaic string formation by series control device according to the present invention
The schematic diagram of system.As shown in figure 8, control unit 220 respectively with temperature detecting unit 210, irradiation level detection unit 230, switch K
Be connected, temperature detecting unit 210, irradiation level detection unit 230 detect respectively the work of photovoltaic module current environmental temperature and
Solar irradiance (intensity of illumination), and the current environmental temperature detected and irradiation level are sent to control unit 220, control is single
For member 220 according to the operating temperature and irradiation level of photovoltaic module, the closure contact of controlling switch K 1,2,3 and disconnects four positions.
First, irradiation level is detected by irradiation level detection unit 230, irradiation level is equal to zero if detecting, control unit 220
Controlling switch K is connected to contact 3, and the quantity for making to access the photovoltaic module of photovoltaic system in the photovoltaic string formation is minimum value；If
Irradiation level is more than zero, the environment temperature t of photovoltaic component operation is detected by temperature detecting unit 210, control unit 220 is according to temperature
The current environmental temperature t controlling switch K for the photovoltaic module work that degree sensor detects, wherein, as t ＜ t2, switch K connections
To contact 3；When t2 ＜ t ＜ t3, switch K are connected to contact 2；As t2 ＜ t ＜ t3, switch K is connected to contact 1；As t ＞ t3
When, K is disconnected.
Illustrate by taking Efficiency in Buildings in Tianjin Area as an example, by inquiring about meteorological data：Efficiency in Buildings in Tianjin Area historical low temperature is -20 DEG C,
The lowest temperature on daytime in winter is -5 DEG C, and the lowest temperature on daytime in spring and autumn is 5 DEG C, and the lowest temperature on daytime in summer is 20 DEG C.It is existing
Intend selecting the monocrystalline silicon photovoltaic module of 285W, the main parameter of photovoltaic module is as follows：Open-circuit voltage temperature coefficient kv=-
0.33%th, the operating voltage temperature coefficient k ' of photovoltaic modulev=-0.41%, the open-circuit voltage V of photovoltaic moduleoc=39.26V, light
Lie prostrate the operating voltage V of componentpm=32.36V；The MPPT voltage ranges for the inverter for intending selecting are 550~820V：Set according to string formation
Meter formula can be calculated, suitable for annual largest component serial number Nmax1=21；Suitable for the largest component string on daytime in winter
Join number Nmax2=22；Suitable for the largest component serial number Nmax3=23 on daytime in spring and autumn；Suitable for maximum group of summer day
Part serial number Nmax4=24.
The present invention also provides a kind of photovoltaic system, including foregoing any photovoltaic string formation.
Alternatively, the photovoltaic system further includes foregoing any series control device, the series control device
For carrying out series control to the photovoltaic module unit of photovoltaic string formation described in each group in the photovoltaic system.
Alternatively, each group of photovoltaic string formation at least one set of photovoltaic string formation further includes switch；By described in control
Switch can carry out series control to the photovoltaic module unit of photovoltaic string formation described in each group in the photovoltaic system.
Specifically, the series control device is by controlling the switch K of each group of photovoltaic string formation, with described in control
Whether at least one photovoltaic module unit at least two photovoltaic modulies unit in each group of photovoltaic string formation accesses institute
State photovoltaic system.
Accordingly, scheme provided by the invention, the photovoltaic module quantity of photovoltaic system is accessed in photovoltaic string formation to be changed, real
The adjustable of the photovoltaic module serial number of photovoltaic string formation is showed；And the present invention can be according to environment temperature to being accessed in photovoltaic string formation
The photovoltaic module quantity of photovoltaic system is adjusted so that the serial number of photovoltaic module disclosure satisfy that photovoltaic system design requirement
At the same time, moreover it is possible to realize the maximization access of photovoltaic string formation；Reduce the throwing of the direct current cables, controller switching equipment in photovoltaic system project
Enter, reduce quantities, realize the maximization of photovoltaic system generated energy, improve the flexibility of system design so that system is set
Meter more agrees with actual working environment, reduces dependence of the system design for contravariant equipment, eliminates region to photovoltaic system
The limitation of design.
Function described herein can hardware, by processor perform software, firmware or any combination thereof in implement.
If implement in the software performed by processor, then computer can be stored in using function as one or more instructions or codes
Transmitted on readable media or via computer-readable media.Other examples and embodiment will in of the invention and appended right
Ask in the scope and spirit of book.For example, be attributed to the property of software, function described above can be used by processor,
Hardware, firmware, hardwired appoint the software implementation that the combination of whichever performs in these.In addition, each functional unit can integrate
In a processing unit or unit is individually physically present, can also two or more units be integrated in
In one unit.
In several embodiments provided herein, it should be understood that disclosed technology contents, can pass through others
Mode is realized.Wherein, device embodiment described above is only schematical, such as the division of the unit, Ke Yiwei
A kind of division of logic function, can there is an other dividing mode when actually realizing, for example, multiple units or component can combine or
Person is desirably integrated into another system, or some features can be ignored, or does not perform.Another, shown or discussed is mutual
Between coupling, direct-coupling or communication connection can be INDIRECT COUPLING or communication link by some interfaces, unit or module
Connect, can be electrical or other forms.
The unit illustrated as separating component may or may not be it is physically separate, as control fill
The component put may or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On unit.Some or all of unit therein can be selected to realize the purpose of this embodiment scheme according to the actual needs.
If the integrated unit is realized in the form of SFU software functional unit and is used as independent production marketing or use
When, it can be stored in a computer read/write memory medium.Based on such understanding, technical scheme is substantially
The part to contribute in other words to the prior art or all or part of the technical solution can be in the form of software products
Embody, which is stored in a storage medium, including some instructions are used so that a computer
Equipment (can be personal computer, server or network equipment etc.) perform each embodiment the method for the present invention whole or
Part steps.And foregoing storage medium includes：USB flash disk, read-only storage (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), mobile hard disk, magnetic disc or CD etc. are various can be with store program codes
Medium.
The foregoing is merely the embodiment of the present invention, is not intended to limit the invention, for those skilled in the art
For member, the invention may be variously modified and varied.Any modification within the spirit and principles of the invention, being made,
Equivalent substitution, improvement etc., should be included within scope of the presently claimed invention.
Claims (16)
- A kind of 1. photovoltaic string formation, it is characterised in that including：At least two photovoltaic module units；At least two photovoltaic module Each photovoltaic module unit in unit includes at least one piece of photovoltaic module, to realize by controlling at least two photovoltaics group Whether at least one photovoltaic module unit in part unit accesses photovoltaic system, can change in the photovoltaic string formation and access photovoltaic The quantity of the photovoltaic module of system.
- 2. photovoltaic string formation according to claim 1, it is characterised in thatThe quantity of the photovoltaic module included by each photovoltaic module unit at least two photovoltaic modulies unit is according to The corresponding photovoltaic module maximum serial number of one specific environment temperature determines, to realize under different environment temperatures, makes described The photovoltaic module access photovoltaic system of varying number in photovoltaic string formation；The first specific environment temperature includes at least two environment Temperature, the quantity of included environment temperature and the photovoltaic group included by the photovoltaic string formation in the first specific environment temperature The quantity of part unit is corresponding.
- 3. photovoltaic string formation according to claim 2, it is characterised in that at least two photovoltaic modulies unit, one The quantity of photovoltaic module included by photovoltaic module unit is described at least two included by the first specific environment temperature The corresponding photovoltaic module maximum serial number of minimum environment temperature in environment temperature；Each light in remaining photovoltaic module unit Lie prostrate described at least two of the quantity of the photovoltaic module included by assembly unit according to included by the first specific environment temperature Environment temperature is according to the adjacent corresponding photovoltaic module maximum serial number of environment temperature of each two after temperature height sequence Difference determines.
- 4. the photovoltaic string formation according to Claims 2 or 3, it is characterised in that including：First photovoltaic module unit, the second light Lie prostrate assembly unit, the 3rd photovoltaic module unit and the 4th photovoltaic module unit；The first specific environment temperature includes the first ring Border temperature, second environment temperature, the 3rd environment temperature and the 4th environment temperature；The first environment temperature is local historical low Temperature；And/or the second environment temperature is the local lowest temperature on daytime in winter；And/or the 3rd environment temperature is to work as Ground spring and/or the lowest temperature on daytime in autumn；And/or the 4th environment temperature is the local summer day lowest temperature.
- 5. photovoltaic string formation according to claim 4, it is characterised in that the first photovoltaic module unit is by Nmax1 block light Volt component is composed in series, and the second photovoltaic module unit is composed in series by Δ N1 block photovoltaic modulies, the 3rd photovoltaic module Unit is composed in series by Δ N2 block photovoltaic modulies, and the 4th photovoltaic module unit is composed in series by Δ N3 block photovoltaic modulies；Nmax1 is the corresponding first photovoltaic module maximum serial number of first environment temperature；Δ N1 is the corresponding second photovoltaic module maximum serial number Nmax2 of second environment temperature corresponding with first environment temperature the The difference of one photovoltaic module maximum serial number Nmax1, wherein, first environment temperature is less than second environment temperature；Δ N2 is the corresponding 3rd photovoltaic module maximum serial number Nmax3 of the 3rd environment temperature corresponding with second environment temperature the The difference of two photovoltaic module maximum serial number Nmax2, wherein, second environment temperature is less than the 3rd environment temperature；Δ N3 is the corresponding 4th photovoltaic module maximum serial number Nmax4 of the 4th environment temperature light corresponding with the 3rd environment temperature The difference of component maximum serial number Nmax3 is lied prostrate, wherein, the 3rd environment temperature is less than the 4th environment temperature.
- 6. according to claim 1-5 any one of them photovoltaic string formations, it is characterised in that switch is further included, it is described for controlling Whether at least one photovoltaic module unit at least two photovoltaic module units accesses photovoltaic system, to change the photovoltaic group The quantity of the photovoltaic module of photovoltaic system is accessed in string.
- 7. photovoltaic string formation according to claim 6, it is characterised in that the switch includes at least two contacts, the light At least one contact portion of at least one photovoltaic module unit and the switch in string formation is lied prostrate, the switch closes at difference Contact when corresponding photovoltaic module unit in the photovoltaic string formation can be accessed photovoltaic system.
- 8. a kind of series control method for being used for the photovoltaic module unit such as claim 1-7 any one of them photovoltaic string formations, It is characterized in that, the quantity of the photovoltaic module included by each photovoltaic module unit at least two photovoltaic modulies unit Determined according to the corresponding photovoltaic module maximum serial number of the first specific environment temperature；The first specific environment temperature is included extremely Few two environment temperatures, the quantity of included environment temperature is wrapped with the photovoltaic string formation in the first specific environment temperature The quantity of the photovoltaic module unit included is corresponding；The described method includes：Detect current environmental temperature；At least one photovoltaic module at least two photovoltaic modulies unit is controlled according to the current environmental temperature detected Whether unit accesses photovoltaic system.
- 9. according to the method described in claim 8, it is characterized in that, according to the current environmental temperature control detected at least Whether at least one photovoltaic module unit in two photovoltaic module units accesses photovoltaic system, including：Compare the magnitude relationship of current environmental temperature and the second specific environment temperature, the second specific environment temperature includes described At least one environment temperature in first specific environment temperature；Determined to access the photovoltaic module unit of photovoltaic system at least two photovoltaic modulies unit according to the magnitude relationship；The photovoltaic module unit access photovoltaic system of photovoltaic system is accessed in the definite at least two photovoltaic modulies unit of control System.
- 10. method according to claim 8 or claim 9, it is characterised in that at least two photovoltaic modulies unit, one At least two environment of the quantity of photovoltaic module included by photovoltaic module unit included by the first specific environment temperature The corresponding photovoltaic module maximum serial number of minimum environment temperature in temperature；Each photovoltaic group in remaining photovoltaic module unit At least two environment of the quantity of photovoltaic module included by part unit according to included by the first specific environment temperature Temperature sort according to temperature height after the adjacent corresponding photovoltaic module maximum serial number of environment temperature of each two difference Determine；Before current environmental temperature is detected, further include：Detect current irradiation level；When it is zero to detect irradiation level, it is the minimum to control photovoltaic module quantity at least two photovoltaic modulies unit The corresponding photovoltaic module maximum serial number of environment temperature photovoltaic module unit access photovoltaic system, remaining photovoltaic module list Member does not access photovoltaic system；When detecting that irradiation level is more than zero, controlled according to current environmental temperature at least two photovoltaic modulies unit extremely Whether a few photovoltaic module unit accesses photovoltaic system.
- 11. a kind of series control device for being used for the photovoltaic module unit such as claim 1-7 any one of them photovoltaic string formations, It is characterized in that, the quantity of the photovoltaic module included by each photovoltaic module unit at least two photovoltaic modulies unit Determined according to the corresponding photovoltaic module maximum serial number of the first specific environment temperature；The first specific environment temperature is included extremely Few two environment temperatures, the quantity of included environment temperature is wrapped with the photovoltaic string formation in the first specific environment temperature The quantity of the photovoltaic module unit included is corresponding；Described device includes：Temperature detecting unit, for detecting current environmental temperature；Control unit, the current environmental temperature for being detected according to the temperature detecting unit control at least two photovoltaic Whether at least one photovoltaic module unit in assembly unit accesses photovoltaic system.
- 12. according to the devices described in claim 11, it is characterised in that described control unit is further used for：Compare the magnitude relationship of current environmental temperature and the second specific environment temperature, the second specific environment temperature includes described At least one environment temperature in first specific environment temperature；Determined to access the photovoltaic module unit of photovoltaic system at least two photovoltaic modulies unit according to the magnitude relationship；The photovoltaic module unit access photovoltaic system of photovoltaic system is accessed in the definite at least two photovoltaic modulies unit of control System.
- 13. the device according to claim 11 or 12, it is characterised in that at least two photovoltaic modulies unit, one At least two ring of the quantity of photovoltaic module included by a photovoltaic module unit included by the first specific environment temperature The corresponding photovoltaic module maximum serial number of minimum environment temperature in the temperature of border；Each photovoltaic in remaining photovoltaic module unit At least two ring of the quantity of photovoltaic module included by assembly unit according to included by the first specific environment temperature Border temperature sort according to temperature height after the adjacent corresponding photovoltaic module maximum serial number of environment temperature of each two difference Value determines；Described device further includes：Irradiation level detection unit, for detecting current irradiation level；Described control unit is further used for：When it is zero that the irradiation level detection unit, which detects current irradiation level, control at least two photovoltaic modulies unit Photovoltaic module quantity accesses for the photovoltaic module unit of the corresponding photovoltaic module maximum serial number of the minimum environment temperature Photovoltaic system, remaining photovoltaic module unit do not access photovoltaic system；When the irradiation level detection unit detects that current irradiation level is more than zero, according to current environmental temperature control at least Whether at least one photovoltaic module unit in two photovoltaic module units accesses photovoltaic system.
- 14. a kind of photovoltaic system, it is characterised in that including at least one set of such as claim 1-7 any one of them photovoltaic string formations.
- 15. photovoltaic system according to claim 14, it is characterised in that further include such as any one of claim 11-13 institutes The series control device stated, the series control device are used for the photovoltaic to photovoltaic string formation described in each group in the photovoltaic system Assembly unit carries out series control.
- 16. the photovoltaic system according to claims 14 or 15, it is characterised in that every at least one set of photovoltaic string formation One group of photovoltaic string formation further includes switch；By controlling the switch can be to photovoltaic string formation described in each group in the photovoltaic system Photovoltaic module unit carry out series control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711015589.2A CN107943194A (en) | 2017-10-25 | 2017-10-25 | Photovoltaic group string, series control method and device thereof, and photovoltaic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711015589.2A CN107943194A (en) | 2017-10-25 | 2017-10-25 | Photovoltaic group string, series control method and device thereof, and photovoltaic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107943194A true CN107943194A (en) | 2018-04-20 |
Family
ID=61935662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711015589.2A Pending CN107943194A (en) | 2017-10-25 | 2017-10-25 | Photovoltaic group string, series control method and device thereof, and photovoltaic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107943194A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109638882A (en) * | 2018-12-29 | 2019-04-16 | 华为数字技术（苏州）有限公司 | Photovoltaic system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203840274U (en) * | 2013-12-18 | 2014-09-17 | 广西比迪光电科技工程有限责任公司 | Solar photovoltaic power generation system of variable topological structure |
| CN203851097U (en) * | 2013-12-13 | 2014-09-24 | 广西比迪光电科技工程有限责任公司 | Solar photovoltaic assembly integration unit in variable topological structure |
| CN105446412A (en) * | 2015-12-17 | 2016-03-30 | 江苏大学 | MPPT method based on temperature and light intensity feedback |
| CN206498205U (en) * | 2017-01-13 | 2017-09-15 | 广西申能达智能技术有限公司 | A kind of solar energy power generating Power Matching Control System |
-
2017
- 2017-10-25 CN CN201711015589.2A patent/CN107943194A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203851097U (en) * | 2013-12-13 | 2014-09-24 | 广西比迪光电科技工程有限责任公司 | Solar photovoltaic assembly integration unit in variable topological structure |
| CN203840274U (en) * | 2013-12-18 | 2014-09-17 | 广西比迪光电科技工程有限责任公司 | Solar photovoltaic power generation system of variable topological structure |
| CN105446412A (en) * | 2015-12-17 | 2016-03-30 | 江苏大学 | MPPT method based on temperature and light intensity feedback |
| CN206498205U (en) * | 2017-01-13 | 2017-09-15 | 广西申能达智能技术有限公司 | A kind of solar energy power generating Power Matching Control System |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109638882A (en) * | 2018-12-29 | 2019-04-16 | 华为数字技术（苏州）有限公司 | Photovoltaic system |
| US11626738B2 (en) | 2018-12-29 | 2023-04-11 | Huawei Digital Power Technologies Co., Ltd. | Photovoltaic system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106849164B (en) | A kind of isolated island micro-capacitance sensor unifies SOC balance control method | |
| CN101978512B (en) | Solar cell | |
| CN101282045A (en) | Battery charging apparatus as well as control method thereof | |
| CN202997597U (en) | Intelligent management device for super-capacitor module | |
| US20120062036A1 (en) | Camera Controlled Solar Cells Array | |
| CN107644118A (en) | A kind of intelligent power distribution Sofe Switch timing optimization method of integrated energy storage | |
| CN103092249B (en) | Tracing method of solar battery maximum power point | |
| CN105787235A (en) | Method and device for establishing photovoltaic cell simulation model | |
| CN107943194A (en) | Photovoltaic group string, series control method and device thereof, and photovoltaic system | |
| CN108242842A (en) | A kind of managing device and its method of the parallel connection of different type accumulator group | |
| CN107340798A (en) | A kind of solar power generation MPPT control devices and method | |
| CN101752609B (en) | MW-class Ni-MH battery energy storage system | |
| CN103580263A (en) | Electric energy control method, controller and residential electric energy system | |
| CN206178019U (en) | Battery monomer voltage acquisition circuit | |
| CN205319785U (en) | Charging device is folded to solar energy | |
| CN204013383U (en) | Battery tandem power optimization photovoltaic module | |
| CN206432750U (en) | A kind of multi-processor module electrochemical cell total management system | |
| Sibiński et al. | Degradation of flexible thin-film solar cells due to a mechanical strain | |
| CN203398816U (en) | Power battery group equalization device | |
| CN102386807B (en) | Power management system and power management method | |
| CN105728351B (en) | Battery cell method for separating | |
| NL2025292B1 (en) | Switching matrix for reconfigurable PV modules and systems | |
| CN204155943U (en) | Novel glass layer and the crystal silicon solar photovoltaic module with this glassy layer | |
| CN206894318U (en) | A kind of solar storage battery charging-discharging controller based on memristor | |
| CN206332879U (en) | A kind of solar energy and mains hybrid LED street lamp control system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180420 |
|
| RJ01 | Rejection of invention patent application after publication |