CN107171638A - The division methods and device of a kind of group of set of strings - Google Patents
The division methods and device of a kind of group of set of strings 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
- 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
Abstract
The invention provides the division methods of a kind of group of set of strings and device.Apply in mountain region photovoltaic apparatus, methods described includes：Each group string is marked off into be analyzed group of different set of strings according to a group size for string electric current；From to be analyzed group of set of strings, remove and the unmatched to be analyzed group of string of history group string electric current；To be analyzed group of string of removal is combined as to be analyzed group of new set of strings.Group string electric current is distinguished with the unmatched to be analyzed group of string of history group string electric current with other group strings by the present invention, foundation is provided for accurate failure group string of searching, reduces the probability of erroneous judgement.
Description
Technical field
The present invention relates to photovoltaic art, the division methods and device of more particularly to a kind of group set of strings.
Background technology
Solar power generation is a kind of emerging regenerative resource, and wherein photovoltaic module (being also solar panel) is the sun
Core in energy electricity generation system, is also most important part in solar power system.By multiple photovoltaic modulies series connection shape
Higher voltage can be obtained into photovoltaic group string, the parallel connection of multiple photovoltaic group strings can be obtained into higher electric current.By multiple photovoltaics
Group connection in series-parallel is arranged in header box, is easy to the maintenance and management of staff.
In the photo-voltaic power generation station of mountain region, the characteristics of due to landform, the arrangement of photovoltaic group string is irregular, towards it is inconsistent, tilt
Angle is inconsistent, and when photovoltaic group string breaks down, traditional accident analysis unit in units of header box can not meet standard
Really search the requirement of failure group string.Failure group string is searched in order to accurate, reduces the probability of erroneous judgement, it is necessary to seek new analysis hand
Section.
The content of the invention
The present invention proposes the division methods of a kind of group of set of strings, and mountain region can not be met to solve conventional failure analytic unit
The problem of photo-voltaic power generation station accurately searches failure group string.
According to one aspect of the present invention there is provided the division methods of a kind of group of set of strings, apply in mountain region photovoltaic apparatus,
Methods described includes：
Each group string is marked off into be analyzed group of different set of strings according to a group size for string electric current；
From to be analyzed group of set of strings, remove and the unmatched to be analyzed group of string of history group string electric current；
To be analyzed group of string of removal is combined as to be analyzed group of new set of strings.
There is provided the division device of a kind of group of set of strings according to another aspect of the present invention, it is characterised in that is deployed in mountain
Ground photovoltaic apparatus, described device includes：
To be analyzed group of set of strings division module, for each group string to be marked off into different treat point according to a group size for string electric current
Analysis group set of strings；
Mismatch group string removes module, for be analyzed group of set of strings, removing unmatched with history group string electric current
To be analyzed group of string；
To be analyzed group of set of strings composite module, for be analyzed group of string of removal to be combined as to be analyzed group of new trail
Close.
According to the embodiment of the present invention, each group string is marked off into be analyzed group of different trails according to a group size for string electric current
Close, rather than it is fixed using header box as analytic unit；From to be analyzed group of set of strings, remove and mismatched with history group string electric current
To be analyzed group of string；To be analyzed group of string of removal is combined as to be analyzed group of new set of strings.By group string electric current and history group string
The unmatched to be analyzed group of string of electric current is distinguished with other group strings, is provided foundation for accurate failure group string of searching, is reduced mistake
The probability of judgement.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention,
And can be practiced according to the content of specification, and in order to allow above and other objects of the present invention, feature and advantage can
Become apparent, below especially exemplified by the embodiment of the present invention.
Brief description of the drawings
By reading the detailed description of hereafter preferred embodiment, various other advantages and benefit is common for this area
Technical staff will be clear understanding.Accompanying drawing is only used for showing the purpose of preferred embodiment, and is not considered as to the present invention
Limitation.And in whole accompanying drawing, identical part is denoted by the same reference numerals.In the accompanying drawings：
Fig. 1 is the step flow chart of the division methods of according to embodiments of the present invention one a kind of group of set of strings；
Fig. 2 is the step flow chart of the division methods of according to embodiments of the present invention two a kind of group of set of strings；
Fig. 3 is the block diagram of the division device of according to embodiments of the present invention three a kind of group of set of strings.
Embodiment
The exemplary embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although showing the disclosure in accompanying drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
Limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
Complete conveys to those skilled in the art.
Embodiment one
The division methods of a kind of group of set of strings provided in an embodiment of the present invention are discussed in detail.
Reference picture 1, shows the step flow chart of the division methods of a kind of group of set of strings in the embodiment of the present invention, application
In mountain region photovoltaic apparatus, methods described includes：
Step 101, each group string is marked off into be analyzed group of different set of strings according to a group size for string electric current.
In the present embodiment, traditional accident analysis unit is generally in units of header box, in the present invention not with header box
For unit, but in units of group string number, such as 16 group strings are had in header box, can use 16 group strings for unit stroke
It is grouped set of strings, it would however also be possible to employ 20 group strings are unit division group set of strings, specifically uses how many group strings to be divided for unit
Group set of strings, can choose a suitable value according to total group string number in power station, to facilitate follow-up calculating and group trail
The division of conjunction.
It is unit to choose suitable group string number, and each group string in unit is marked off into difference according to a group size for string electric current
To be analyzed group of set of strings, specifically, two set can be divided into, four set can also be divided into.For example, with 16
Group string is unit, and 16 group strings can be averagely divided into 2 to be analyzed group of set of strings, each 8 group strings of set；With 20 groups
Go here and there as unit, 20 group strings can be averagely divided into 4 to be analyzed group of set of strings.During division can according to mean allocation side
Formula, can also be divided in other ways, for a group string is divided into several set, specifically using what model split, this hair
Bright embodiment does not make detailed restriction, can be configured according to actual conditions.
Step 102, to be analyzed group of set of strings, remove and the unmatched to be analyzed group of string of history group string electric current.
In the present embodiment, good to be analyzed group of set of strings is divided, by the group string electric current of each group string in each set and history group
String electric current is compared, such as calculates the average value of the group string history group string electric current, then calculates group string electric current and history group string electricity
The difference of levelling average, can pre-set the threshold value of difference, if difference is more than default threshold value, the group string electricity of the group string
Stream is mismatched with history group string electric current；If difference is less than default threshold value, group string electric current and the history group string electricity of the group string
Stream matching.Find with after history group unmatched group of string of string electric current, by the group string found to be analyzed group of set of strings
Remove.The embodiment of the present invention can be searched and the unmatched to be analyzed group of string of history group string electric current using aforesaid way, can also be adopted
Search in other ways and do not do detailed restriction to this with the unmatched to be analyzed group of string of history group string electric current, the embodiment of the present invention,
It can be configured according to actual conditions.
Step 103, to be analyzed group of string of removal is combined as to be analyzed group of new set of strings.
In the present embodiment, found in be analyzed group of set of strings with the unmatched to be analyzed group of string of history group string electric current,
These to be analyzed group of string is removed from former to be analyzed group of set of strings, reconfigured as to be analyzed group of new set of strings, statistics original
Remaining group of string after to be analyzed group of set of strings removal group string, remaining group of string is arranged as new set to be analyzed.For example, with 16
Individual group of string is unit, and 16 group strings are divided into 2 to be analyzed group of set of strings A and B, each 8 group strings of set, from set A
Remove 2 group strings, from set B remove 1 group string, then this 16 group strings reformulated three to be analyzed group of set of strings A1,
The 3 group strings included in B1, C, C are the 1 group strings removed in the two group strings and set B removed in set A, and A1 collection is combined into A
Set removes remaining 6 group strings after 2 group strings, and B1 collection is combined into set B and removes remaining 7 group strings after 1 group string.
In summary, each group string is marked off to be analyzed group of different strings by the embodiment of the present invention according to a group size for string electric current
Set, rather than it is fixed using header box as analytic unit；From to be analyzed group of set of strings, do not remove with history group string electric current not
The to be analyzed group of string matched somebody with somebody；To be analyzed group of string of removal is combined as to be analyzed group of new set of strings, by group string electric current and history group
The string unmatched to be analyzed group of string of electric current is distinguished with other group strings, is provided foundation for accurate failure group string of searching, is reduced
The probability of erroneous judgement.
Embodiment two
Reference picture 2, shows the step flow chart of the division methods of a kind of group of set of strings in the embodiment of the present invention.
Step 201, described group of string electric current of each group string is normalized.
In the present embodiment, normalized is calculated after each group string electric current for organizing string unit capacity, normalized, group
Go here and there electric current comparison and calculate all be in same magnitude, therefore to group string divide before, to each group string group string electricity
Stream is normalized.Further, the normalized and splitting scheme of the embodiment of the present invention are applied in irradiation level
More than 400W/ ㎡, peak sunshine hours are more than under conditions of 3h, if being unsatisfactory for irradiation level and peak sunshine hours, division side
Case is influenceed larger by weather.Also, after normalized, the group string that group string is not connect and has been broken down directly is removed,
The group string for not connecing group string and having broken down is not considered when dividing to be analyzed group of set of strings.
Step 202, the average value of described group of string electric current is calculated.
In the present embodiment, choose after good suitable group string number, calculate the group string current average of these group strings, for example,
In units of 20 group strings, the group string current average of this 20 group strings is calculated.
Step 203, according to the relation of described group of string electric current and described group of string current average, mark off different to be analyzed
Group set of strings.
In the present embodiment, the relation of the group string electric current and group string current average gone here and there according to each group divides to be analyzed group
The mode of set of strings comprises at least following several：
Mode one：
Step 2031, the difference of the described group of string electric current and described group of string current average of each group string is calculated.Specifically,
A group string current average is subtracted with the group string electric current of each group string and obtains difference, for example, each group string electric current is distinguished in 20 group strings
For 7.35A, 7.41A, 7.3A, 7.29A, 7.26A, 7.24A, 7.13A, 7.16A, 7.2A, 7.15A, 7.49A, 7.5A, 7.6A,
7.8A, 7.91A, 7.99A, 7.93A, 7.94A, 8.02A, 8.04A, group string current average is 7.53A, difference is respectively-
0.18、-0.12、-0.23、-0.24、-0.27、-0.29、-0.4、-0.37、-0.33、-0.38、-0.04、-0.03、0.07、
0.27、0.38、0.46、0.4、0.41、0.49、0.51。
Step 2032, mark off just apart to be analyzed group of set of strings and bear apart to be analyzed group of trail according to the difference
Close.
In the present embodiment, it is the group string that group string electric current is more than group string current average just apart to be analyzed group of string, bears distance
To be analyzed group of string is the group string that group string electric current is less than group string current average, calculates the group string electric current and group string electric current of each group string
After the difference of average value, the group string that difference is more than zero is divided into just apart to be analyzed group of set of strings, difference is minus
Group string, which is divided into, to be born apart to be analyzed group of set of strings, and if there is null group of string of difference, this packet chain is divided into zero
Apart to be analyzed group of set of strings.By taking 20 group strings in step 2031 as an example, group string electric current and the group string electric current of preceding 12 group strings
The difference of average value is negative value, this 12 group strings is divided into negative apart to be analyzed group of set of strings, the group string electric current of rear 8 group strings
It is on the occasion of this 8 group strings are divided into just apart to be analyzed group of set of strings with a group difference for string current average.
Mode two：
Step 2033, the ratio of the described group of string electric current and described group of string current average of each group string is calculated.Specifically,
Ratio is obtained with the group string electric current divided by group string current average of each group string.By taking 20 group strings in step 2031 as an example, put down
Average is 7.53A, ratio is respectively 0.98,0.98,0.97,0.97,0.96,0.96,0.95,0.95,0.96,0.95,0.99,
0.99、1.01、1.04、1.05、1.06、1.05、1.05、1.07、1.07。
Step 2034, marked off more than first setting to be analyzed group of set of strings of ratio and set less than first according to the ratio
Determine to be analyzed group of set of strings of ratio.The ratio of division is preset, by taking 20 group strings in step 2031 as an example, ratio will be divided
It is set as 1.0, then the ratio of the group string electric current of preceding 12 group strings and group string current average is less than 1.0, this 12 group strings is drawn
It is divided into less than setting to be analyzed group of set of strings of ratio, the ratio of the group string electric current and group string current average of rear 8 group strings is more than
1.0, this 8 group strings are divided into more than setting to be analyzed group of set of strings of ratio.According to the difference that ratio is set is divided, mark off
More than setting to be analyzed group of set of strings of ratio and, the present invention different less than the group string included in setting to be analyzed group of set of strings of ratio
Detailed restriction is not made to setting ratio, can be configured according to actual conditions.
Mode three：
Step 2035, the difference of the described group of string electric current and described group of string current average of each group string is calculated.
Step 2036, mark off just apart to be analyzed group of set of strings and bear apart to be analyzed group of trail according to the difference
Close.
Step 2035 and 2036 identical with discussion above, therefore not to repeat here.
Step 2037, the difference and the ratio of described group of string electric current are calculated.Specifically, with the group string electric current of each group string
Subtract a group string current average and obtain difference, the group string electric current for reusing difference divided by each group string itself obtains ratio.Still with
Exemplified by 20 group strings in step 2031, bear in be analyzed group of set of strings, difference is respectively -0.18, -0.12, -0.23, -
0.24th, -0.27, -0.29, -0.4, -0.37, -0.33, -0.38, -0.04, -0.03, divided by respective group of string electric current obtain
Ratio is respectively -0.024, -0.016, -0.032, -0.033, -0.037, -0.04, -0.056, -0.052, -0.046, -
0.053、-0.005、-0.004；Just in be analyzed group of set of strings, difference is respectively 0.07,0.27,0.38,0.46,0.4,
0.41st, 0.49,0.51, divided by the obtained ratio of respective group of string electric current is respectively 0.009,0.035,0.048,0.058,
0.05、0.052、0.061、0.063。
Step 2038, just marked off in be analyzed group of set of strings more than second setting to be analyzed group of set of strings of ratio
With less than second setting to be analyzed group of set of strings of ratio.Specifically, in one division of setting just in be analyzed group of set of strings
Ratio, will be greater than ratio and the group string less than ratio divides to be analyzed group of different set of strings into.With 8 in step 2037 positive distances
Exemplified by be analyzed group of string, ratio is set as 0.1, then is divided into ratio less than to be analyzed group of ratio of setting for 0.009 group string
Set of strings, remaining is divided into more than setting to be analyzed group of set of strings of ratio.The embodiment of the present invention does not make detailed limit to setting ratio
It is fixed, it can be configured according to actual conditions.
Step 2039, mark off more than the 3rd setting to be analyzed group of set of strings of ratio and be less than in negative distance group set of strings
3rd setting to be analyzed group of set of strings of ratio.Specifically, a division ratio is also set in be analyzed group of set of strings negative,
It will be greater than ratio and the group string less than ratio divide to be analyzed group of different set of strings into.Treated point with 12 negative distances in step 2037
Exemplified by analysis group string, ratio is set as -0.1, then two group strings that ratio is -0.005 and -0.004 is divided into more than setting ratio
It is worth to be analyzed group of set of strings, remaining is divided into less than setting to be analyzed group of set of strings of ratio.The embodiment of the present invention is to setting ratio
Do not make restriction in detail, can be configured according to actual conditions.
From the mode of to be analyzed group of set of strings of above-mentioned division, the group string number in be analyzed group of set of strings might not
It is mean allocation.
Step 204, by described group of string electric current of each group string in the to be analyzed group of set of strings and across the period plan of history curve
Close.
In the present embodiment, the group string electric current of each group string in power station, basis after collection a period of time are gathered in fixed time period
The group string electric current of collection can draw the group string current curve of each group string, by each group in be analyzed group of set of strings of collection during division
The group string electric current of string carries out across period fitting with the history curve drawn.For example, respectively 6:00、12:00、18:00 collection electricity
The group string electric current of each group string in standing, the group string electric current and history for treating each group string in analysis group set of strings by these three periods is bent
Line is fitted.The Software on Drawing history curves such as matlab can be used, calculating is fitted.
Step 205, the group string that degree of fitting does not meet setting range is found out.
In the present embodiment, the scope of degree of fitting can be preset, the group string that degree of fitting does not meet setting range is found out.
Can also be using the softwares such as matlab displaying history curve and the curve for organizing string electric current for drawing acquisition time, according to what is intuitively shown
Profile lookup goes out the group string that degree of fitting does not meet setting range.
Step 206, the group string found out is removed from the to be analyzed group of set of strings.
In summary, each group string is marked off to be analyzed group of different strings by the embodiment of the present invention according to a group size for string electric current
Set, rather than it is fixed using header box as analytic unit；From to be analyzed group of set of strings, do not remove with history group string electric current not
The to be analyzed group of string matched somebody with somebody；To be analyzed group of string of removal is combined as to be analyzed group of new set of strings, by group string electric current and history group
The string unmatched to be analyzed group of string of electric current is distinguished with other group strings, is provided foundation for accurate failure group string of searching, is reduced
The probability of erroneous judgement.
It should be noted that for foregoing embodiment of the method, in order to be briefly described, therefore it is all expressed as a series of
Combination of actions, but those skilled in the art should know, the present invention is not limited by described sequence of movement, because according to
According to the present invention, some steps can be carried out sequentially or simultaneously using other.Secondly, those skilled in the art should also know,
Embodiment described in this description belongs to preferred embodiment, and involved action is not necessarily essential to the invention.
Embodiment three
The division device of a kind of group of set of strings provided in an embodiment of the present invention is discussed in detail.
Reference picture 3, shows the structured flowchart for dividing device of a kind of group of set of strings in the embodiment of the present invention, is deployed in
Mountain region photovoltaic apparatus, described device includes：
To be analyzed group of set of strings division module 301 is different for each group string to be marked off according to a group size for string electric current
To be analyzed group of set of strings；
Mismatch group string removes module 302, for be analyzed group of set of strings, removing and being mismatched with history group string electric current
To be analyzed group of string；
To be analyzed group of set of strings composite module 303, for be analyzed group of string of removal to be combined as to be analyzed group of new string
Set.
Alternatively, the to be analyzed group of set of strings division module includes：
Mean value computation submodule, the average value for calculating described group of string electric current；
Group string divides submodule, for the relation according to described group of string electric current and described group of string current average, marks off
To be analyzed group of different set of strings.
Alternatively, described group of string divides submodule and included：
First difference computational unit, described group of string electric current and described group of string current average for calculating each group string
Difference；
First group of string apart from division unit, for according to the difference mark off just apart to be analyzed group of set of strings and it is negative away from
From to be analyzed group set of strings.
Alternatively, described group of string divides submodule and included：
First ratio calculation unit, described group of string electric current and described group of string current average for calculating each group string
Ratio；
First group of string ratio division unit, for being marked off according to the ratio more than first setting to be analyzed group of string of ratio
Gather and less than first setting to be analyzed group of set of strings of ratio.
Alternatively, described group of string divides submodule and included：
Second difference computational unit, described group of string electric current and described group of string current average for calculating each group string
Difference；
Second group of string apart from division unit, for according to the difference mark off just apart to be analyzed group of set of strings and it is negative away from
From to be analyzed group set of strings；
Second ratio calculation unit, for calculating the difference and the ratio of described group of string electric current；
Just marked off in be analyzed group of set of strings more than second setting to be analyzed group of set of strings of ratio and less than the
Two setting to be analyzed group of set of strings of ratio；
Second group of string ratio division unit, is treated point for being marked off in negative distance group set of strings more than the 3rd setting ratio
Analysis group set of strings and less than the 3rd setting to be analyzed group of set of strings of ratio.
Alternatively, the mismatch group string removes module and included:
Curve matching submodule, for described group of string electric current of each group string in the to be analyzed group of set of strings and history is bent
Across the period fitting of line；
Group string searches submodule, and the group string of setting range is not met for finding out degree of fitting；
Group string removes submodule, and the group string for that will be found out is removed from the to be analyzed group of set of strings.
Alternatively, the division device is applied is more than 400W/ ㎡ in irradiation level, and peak sunshine hours are more than 3h condition
Under.
Alternatively, before the to be analyzed group of set of strings division module, described device also includes：
Normalized module, is normalized for the described group of string electric current to each group string.
In summary, each group string is marked off to be analyzed group of different strings by the embodiment of the present invention according to a group size for string electric current
Set, rather than it is fixed using header box as analytic unit；From to be analyzed group of set of strings, do not remove with history group string electric current not
The to be analyzed group of string matched somebody with somebody；To be analyzed group of string of removal is combined as to be analyzed group of new set of strings, by group string electric current and history group
The string unmatched to be analyzed group of string of electric current is distinguished with other group strings, is provided foundation for accurate failure group string of searching, is reduced
The probability of erroneous judgement.
For the division device embodiment of above-mentioned group of set of strings, because it is substantially similar to embodiment of the method, so
What is described is fairly simple, and the relevent part can refer to the partial explaination of embodiments of method.
Each embodiment in this specification is described by the way of progressive, what each embodiment was stressed be with
Between the difference of other embodiment, each embodiment identical similar part mutually referring to.
It would have readily occurred to a person skilled in the art that be：Any combination application of each above-mentioned embodiment is all feasible, therefore
Any combination between each above-mentioned embodiment is all embodiment of the present invention, but this specification exists as space is limited,
This is not just detailed one by one.
The splitting scheme of group set of strings is not solid with any certain computer, virtual system or miscellaneous equipment provided herein
There is correlation.Various general-purpose systems can also be used together with based on teaching in this.As described above, construction has this hair
Structure required by the system of bright scheme is obvious.In addition, the present invention is not also directed to any certain programmed language.Should
Understand, it is possible to use various programming languages realize the content of invention described herein, and language-specific is done above
Description be in order to disclose the present invention preferred forms.
In the specification that this place is provided, numerous specific details are set forth.It is to be appreciated, however, that the implementation of the present invention
Example can be put into practice in the case of these no details.In some instances, known method, structure is not been shown in detail
And technology, so as not to obscure the understanding of this description.
Similarly, it will be appreciated that in order to simplify the disclosure and help to understand one or more of each inventive aspect, exist
Above in the description of the exemplary embodiment of the present invention, each feature of the invention is grouped together into single implementation sometimes
In example, figure or descriptions thereof.However, the method for the disclosure should be construed to reflect following intention：It is i.e. required to protect
The application claims of shield features more more than the feature being expressly recited in each claim.More precisely, such as right
As claim reflects, inventive aspect is all features less than single embodiment disclosed above.Therefore, it then follows tool
Thus claims of body embodiment are expressly incorporated in the embodiment, wherein the conduct of each claim in itself
The separate embodiments of the present invention.
Those skilled in the art, which are appreciated that, to be carried out adaptively to the module in the equipment in embodiment
Change and they are arranged in one or more equipment different from the embodiment.Can be the module or list in embodiment
Member or component be combined into a module or unit or component, and can be divided into addition multiple submodule or subelement or
Sub-component.In addition at least some in such feature and/or process or unit exclude each other, it can use any
Combination is disclosed to all features disclosed in this specification (including adjoint claim, summary and accompanying drawing) and so to appoint
Where all processes or unit of method or equipment are combined.Unless expressly stated otherwise, this specification (including adjoint power
Profit is required, summary and accompanying drawing) disclosed in each feature can or similar purpose identical, equivalent by offer alternative features come generation
Replace.
Although in addition, it will be appreciated by those of skill in the art that some embodiments described herein include other embodiments
In included some features rather than further feature, but the combination of the feature of be the same as Example does not mean in of the invention
Within the scope of and form different embodiments.For example, in detail in the claims, embodiment claimed it is one of any
Mode it can use in any combination.
The present invention all parts embodiment can be realized with hardware, or with one or more processor run
Software module realize, or realized with combinations thereof.It will be understood by those of skill in the art that can use in practice
In the splitting scheme of microprocessor or digital signal processor (DSP) to realize group set of strings according to embodiments of the present invention
The some or all functions of some or all parts.The present invention is also implemented as being used to perform method as described herein
Some or all equipment or program of device (for example, computer program and computer program product).Such reality
The program of the existing present invention can be stored on a computer-readable medium, or can have the form of one or more signal.
Such signal can be downloaded from internet website and obtained, and either be provided or in any other form on carrier signal
There is provided.
It should be noted that the present invention will be described rather than limits the invention for above-described embodiment, and ability
Field technique personnel can design alternative embodiment without departing from the scope of the appended claims.In the claims,
Any reference symbol between bracket should not be configured to limitations on claims.Word "comprising" is not excluded the presence of not
Element or step listed in the claims.Word "a" or "an" before element does not exclude the presence of multiple such
Element.The present invention can be by means of including the hardware of some different elements and coming real by means of properly programmed computer
It is existing.In if the unit claim of equipment for drying is listed, several in these devices can be by same hardware branch
To embody.The use of word first, second, and third does not indicate that any order.These words can be explained and run after fame
Claim.
Claims (16)
1. the division methods of a kind of group of set of strings, it is characterised in that apply in mountain region photovoltaic apparatus, methods described includes：
Each group string is marked off into be analyzed group of different set of strings according to a group size for string electric current；
From to be analyzed group of set of strings, remove and the unmatched to be analyzed group of string of history group string electric current；
To be analyzed group of string of removal is combined as to be analyzed group of new set of strings.
2. according to the method described in claim 1, it is characterised in that described to mark off each group string according to a group size for string electric current
To be analyzed group of different set of strings include：
Calculate the average value of described group of string electric current；
According to the relation of described group of string electric current and described group of string current average, to be analyzed group of different set of strings are marked off.
3. method according to claim 2, it is characterised in that described to be put down according to described group of string electric current with described group of string electric current
The relation of average, marking off to be analyzed group of different set of strings includes：
Calculate the difference of the described group of string electric current and described group of string current average of each group string；
Mark off just apart to be analyzed group of set of strings and bear apart to be analyzed group of set of strings according to the difference.
4. method according to claim 2, it is characterised in that described to be put down according to described group of string electric current with described group of string electric current
The relation of average, marking off to be analyzed group of different set of strings includes：
Calculate the ratio of the described group of string electric current and described group of string current average of each group string；
Marked off according to the ratio more than first setting to be analyzed group of set of strings of ratio and to be analyzed less than the first setting ratio
Group set of strings.
5. method according to claim 2, it is characterised in that described to be put down according to described group of string electric current with described group of string electric current
The relation of average, marking off to be analyzed group of different set of strings includes：
Calculate the difference of the described group of string electric current and described group of string current average of each group string；
Mark off just apart to be analyzed group of set of strings and bear apart to be analyzed group of set of strings according to the difference；
Calculate the difference and the ratio of described group of string electric current；
Just marking off more than second setting to be analyzed group of set of strings of ratio and set less than second in be analyzed group of set of strings
Determine to be analyzed group of set of strings of ratio；
Marked off in negative distance group set of strings more than the 3rd setting to be analyzed group of set of strings of ratio and less than the 3rd setting ratio
To be analyzed group of set of strings.
6. according to the method described in claim 1, it is characterised in that described to be analyzed group of set of strings, remove and history group
The string unmatched to be analyzed group of string of electric current includes:
By described group of string electric current of each group string in the to be analyzed group of set of strings and across the period fitting of history curve；
Find out the group string that degree of fitting does not meet setting range；
The group string found out is removed from the to be analyzed group of set of strings.
7. according to the method described in claim 1, it is characterised in that the division methods are applied is more than 400W/ ㎡ in irradiation level,
Peak sunshine hours are more than under conditions of 3h.
8. according to the method described in claim 1, it is characterised in that divide each group string according to a group size for string electric current described
Go out before to be analyzed group of different set of strings, methods described also includes：
Described group of string electric current of each group string is normalized.
9. the division device of a kind of group of set of strings, it is characterised in that be deployed in mountain region photovoltaic apparatus, described device includes：
To be analyzed group of set of strings division module, for each group string to be marked off into different to be analyzed groups according to a group size for string electric current
Set of strings；
Mismatch group string removes module, for be analyzed group of set of strings, removes and history group string electric current is unmatched treats point
Analysis group string；
To be analyzed group of set of strings composite module, for be analyzed group of string of removal to be combined as to be analyzed group of new set of strings.
10. device according to claim 9, it is characterised in that the to be analyzed group of set of strings division module includes：
Mean value computation submodule, the average value for calculating described group of string electric current；
Group string divides submodule, for the relation according to described group of string electric current and described group of string current average, marks off difference
To be analyzed group of set of strings.
11. device according to claim 10, it is characterised in that described group of string, which divides submodule, to be included：
First difference computational unit, the difference of described group of string electric current and described group of string current average for calculating each group string
Value；
First group of string is just treated apart from division unit for being marked off according to the difference apart to be analyzed group of set of strings and negative distance
Analysis group set of strings.
12. device according to claim 10, it is characterised in that described group of string, which divides submodule, to be included：
First ratio calculation unit, the ratio of described group of string electric current and described group of string current average for calculating each group string
Value；
First group of string ratio division unit, for being marked off according to the ratio more than first setting to be analyzed group of set of strings of ratio
With less than first setting to be analyzed group of set of strings of ratio.
13. device according to claim 10, it is characterised in that described group of string, which divides submodule, to be included：
Second difference computational unit, the difference of described group of string electric current and described group of string current average for calculating each group string
Value；
Second group of string is just treated apart from division unit for being marked off according to the difference apart to be analyzed group of set of strings and negative distance
Analysis group set of strings；
Second ratio calculation unit, for calculating the difference and the ratio of described group of string electric current；
Just marking off more than second setting to be analyzed group of set of strings of ratio and set less than second in be analyzed group of set of strings
Determine to be analyzed group of set of strings of ratio；
Second group of string ratio division unit, for being marked off in negative distance group set of strings more than the 3rd to be analyzed group of ratio of setting
Set of strings and less than the 3rd setting to be analyzed group of set of strings of ratio.
14. device according to claim 9, it is characterised in that the mismatch group string, which removes module, to be included:
Curve matching submodule, for by described group of string electric current of each group string in the to be analyzed group of set of strings and history curve across
Period is fitted；
Group string searches submodule, and the group string of setting range is not met for finding out degree of fitting；
Group string removes submodule, and the group string for that will be found out is removed from the to be analyzed group of set of strings.
15. device according to claim 9, it is characterised in that the division device is applied is more than 400W/ in irradiation level
㎡, peak sunshine hours are more than under conditions of 3h.
16. device according to claim 9, it is characterised in that before the to be analyzed group of set of strings division module, institute
Stating device also includes：
Normalized module, is normalized for the described group of string electric current to each group string.
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