CN104753462B - Photovoltaic module fault detection method - Google Patents
Photovoltaic module fault detection method Download PDFInfo
- Publication number
- CN104753462B CN104753462B CN201510178965.4A CN201510178965A CN104753462B CN 104753462 B CN104753462 B CN 104753462B CN 201510178965 A CN201510178965 A CN 201510178965A CN 104753462 B CN104753462 B CN 104753462B
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- China
- Prior art keywords
- photovoltaic module
- welding
- electricity flow
- induced electricity
- flow valuve
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- 238000001514 detection method Methods 0.000 title claims abstract description 35
- 238000003466 welding Methods 0.000 claims abstract description 51
- 230000005611 electricity Effects 0.000 claims abstract description 38
- 230000002159 abnormal effect Effects 0.000 claims abstract description 21
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 abstract description 6
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 abstract description 6
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 abstract description 6
- 230000007547 defect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000001931 thermography Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005401 electroluminescence Methods 0.000 description 1
- 238000002503 electroluminescence detection Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- 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
-
- 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 a kind of photovoltaic module fault detection method, including：It is powered to photovoltaic module；The induced electricity flow valuve produced by each welding in photovoltaic module on each cell piece is gathered successively；The position of fail battery piece is confirmed according to the induced electricity flow valuve collected.Photovoltaic module fault detection method of the present invention from photovoltaic module surface by gathering the induced electricity flow valuve on each cell piece produced by welding in the energized state, so as to judge the problems such as the problem of welding whether there is rosin joint, sealing-off, cell piece are with the presence or absence of generating electricity abnormal.
Description
Technical field
The present invention relates to technical field of photovoltaic power generation, more particularly to a kind of photovoltaic module fault detection method.
Background technology
Due to long-term in face of outdoor adverse circumstances, photovoltaic module is particularly strict for the requirement of reliability and stability, this
Production process for photovoltaic module proposes the requirement of harshness, and a new photovoltaic module is generally required for carrying out before listing
Substantial amounts of strict detection and certification.But, due to material, temperature and process aspect, part photovoltaic module still can go out
Show some problems, for example, the problems such as cell piece generated energy is uneven, welding (is mainly rosin joint, sealing-off, fracture) extremely, these are asked
Topic will have a strong impact on the normal power generation of the cell piece, or even have influence on whole photovoltaic group once appearing on a certain cell piece
The normal work of part, therefore need at once to detect it when finding that component is abnormal, find abnormal position occur in time.
Existing detection method is mainly using two kinds of technologies, and one kind is EL (Electro-luminescence, electroluminescent hair
Light) detection technique, another is IR thermal imaging inspection technology.For EL detection techniques, electroluminescent principle is mainly used, is come
The more black place of cell piece (illustrating that the electric current that the region is flowed through is smaller) is detected, but whole detection process must be completely black
Carried out in environment, to avoid influence of the visible ray to detection, and the precision of the EL cameras used influences also very on testing result
Greatly so that testing result is sometimes not fully up to expectations.It is by detecting the situation that cell piece generates heat, looking for for Infrared Thermography Technology
To the position of problem cell piece, but for the smaller cell piece of defect, temperature difference also can be smaller, causes infrared thermal imagery
Instrument effect is not good, and testing result is also easily influenceed by heat transfer and produces erroneous judgement.
It can be seen that, for detection welding, cell piece with the presence or absence of it is abnormal the problem of, existing two kinds of detection methods all exist compared with
Big defect, is only judged, it is impossible to exception is intuitively judged whether from data by image.Therefore, it is necessory to carry
Above-mentioned technical problem is solved for a kind of photovoltaic module fault detection method.
The content of the invention
Technical problem solved by the invention is to provide a kind of photovoltaic module fault detection method, to improve prior art
The problem of middle Detection results are not good.
In order to solve the above technical problems, the present invention provides a kind of photovoltaic module fault detection method, including：
It is powered to photovoltaic module；
The induced electricity flow valuve produced by each welding in photovoltaic module on each cell piece is gathered successively；
The position of fail battery piece is confirmed according to the induced electricity flow valuve collected.
Further, it is powered to photovoltaic module, including：Using function generator photovoltaic module positive and negative exit it
Between apply a sine voltage.
Further, the sine voltage is 8-10V.
Further, it is powered to photovoltaic module, including：Apply an alternating current between the positive and negative exit of photovoltaic module
Pressure.
Further, the induced electricity flow valuve produced by each welding successively in collection photovoltaic module on each cell piece,
Including：
Inductance type transducer is placed in the transparent cover plate surface of photovoltaic module；
In the case where photovoltaic module is powered, inductance type transducer is moved successively and put to the top of each cell piece, and is made
The inductance type transducer is corresponding with the position of each welding；
The induced electricity flow valuve that the inductance type transducer is collected is read by ammeter.
Further, the position of fail battery piece is confirmed according to the induced electricity flow valuve collected, including：
Record and compare all induced electricity flow valuves of collection；
Abnormal induced electricity flow valuve is found, and finds out the welding position corresponding to the abnormal current value.
Further, when having 0 in induced electricity flow valuve, then judge that the welding corresponding to the current value is in and disconnect shape
State.
Photovoltaic module fault detection method of the present invention from photovoltaic module surface by gathering each electricity in the energized state
Per the induced electricity flow valuve produced by root bead band on the piece of pond, judged to whether there is event at this on cell piece according to induced electricity flow valuve
Barrier, the problems such as such as welding abnormal welding, cell piece generate electricity abnormal in itself.
Brief description of the drawings
Fig. 1 is the flow chart of photovoltaic module fault detection method of the present invention.
Fig. 2 is the application schematic diagram of photovoltaic module fault detection method of the present invention in one embodiment.
Embodiment
Refer to shown in Fig. 1 and Fig. 2, the present invention provides a kind of photovoltaic module fault detection method, for detecting photovoltaic group
The position of abnormal cell piece in part, thus judge welding on the abnormal cell piece with the presence or absence of rosin joint, come off the problem of, or
Judge cell piece in itself with the presence or absence of the abnormal defect (such as thin gate line electrode, main gate line lead rupture), the photovoltaic of generating electricity
Component includes some cell pieces and connects the welding of cell piece, using detection method of the present invention, can detect battery
The problem of between piece and welding.
As shown in figure 1, photovoltaic module fault detection method of the present invention, comprises the following steps：
S101：It is powered to photovoltaic module；
S102：The induced electricity flow valuve produced by each welding in photovoltaic module on each cell piece is gathered successively；
S103：The position of fail battery piece is confirmed according to the induced electricity flow valuve collected.
Wherein, in present pre-ferred embodiments, " S101：It is powered to photovoltaic module ", refer to exist using function generator
Apply a sine voltage between the positive and negative exit of photovoltaic module, voltage is about 8-10V, due to function generator have compared with
Wide frequency range, and break-make is safer, is the preferred step mode to photovoltaic module in the embodiment of the present invention, please coordinate
Refering to shown in Fig. 2.Certainly, in other embodiments, it can be also powered using other modes to photovoltaic module, such as in photovoltaic module
Positive and negative exit between apply an alternating voltage, can also meet the detection requirement of detection method.Either it is applied in
Sine voltage or alternating voltage, after energization, each cell piece in photovoltaic module will turn into load resistance, and pass through welding
It is connected with each other, there will be electric current to flow through on welding.
In present pre-ferred embodiments, " S102：Each welding institute in photovoltaic module on each cell piece is gathered successively
The induced electricity flow valuve of generation ", please refer to shown in Fig. 2, mainly includes：
Inductance type transducer is placed in the transparent cover plate surface of photovoltaic module；
In the case where photovoltaic module is powered, inductance type transducer is moved successively and put to the top of each cell piece, and is made
The inductance type transducer is corresponding with the position of each welding；
The induced electricity flow valuve that the inductance type transducer is gathered is read by ammeter, the current value is that welding is being powered
The induced-current produced under state, its big I directly reflects the current value size actually flowed through in welding, i.e. induced-current
Current value that is big then being flowed through in expression welding is also larger, and induced-current then illustrates that the current value flowed through in welding is also abnormal extremely,
It is possible thereby to learn the current value for flowing through each cell piece, the current value directly reflects whether there is on present battery piece position
Where defect, the position that failure judgement cell piece can be helped.
Because the quantity of cell piece surface welding and the main gate line number of electrodes on cell piece surface are relevant, therefore, the present invention
Described cell piece mainly contains the battery of the current main flow such as two grid line cell pieces, three grid line cell pieces, four grid line cell pieces
Piece species.For two grid line cell pieces, because cell piece surface has two grid lines, thus the welding of its surface soldered
Only two, when being detected using detection method, the inductance type transducer need to be individually positioned in and two
Described in welding on corresponding position, the induced electricity flow valuve produced by two weldings is so measured respectively, can be same in order to easy to detect
Two inductance type transducers of Shi Caiyong detect that one-time detection can obtain two current values simultaneously to single battery piece, with
This improves detection efficiency.Certainly, for three grid line cell pieces, four grid line cell pieces, detection mode is identical, in practice, by
Welding quantity in each cell piece surface increases accordingly, and welding rosin joint, the probability come off are relatively bigger, utilize the present invention's
The position that detection method can conveniently detect welding rosin joint, come off.
In present pre-ferred embodiments, " S103：The position of fail battery piece is confirmed according to the induced electricity flow valuve collected
Put ", mainly include：All induced electricity flow valuves of collection are recorded and compared, abnormal induced electricity flow valuve are found, and find out the exception
Welding position corresponding to current value.Principle herein is, if the induced-current produced by welding is significantly less than other welding institutes
The induced-current of generation, then be likely to reflect that welding abnormal welding or present battery piece have the exception that generates electricity；If nothing in welding
Electric current by and ammeter can not be collected induced-current, then be likely to reflect that welding has come off or has been disconnected or currently
There is the problem of not generating electricity in the cell piece where welding.It can be seen that, according to the size of current flowed through in welding, event can be quickly found out
Barrier, abnormal position.In actual applications, if the induced-current that photovoltaic module measures root bead band generation when initial is
50mA, and find that the current value is changed into 0 after using 1 year, then now it can determine whether that the welding is disconnected or sealing-off (battery
Piece will not typically completely lose generating capacity in itself, even if Local Damaged, and other positions still have generating capacity, therefore electric current
Being worth will not generally judge that cell piece does not generate electricity completely for 0), and the I-V data of detection photovoltaic module are depended merely in the prior art, it is
The local defect of a certain cell piece can not be reflected.
In summary, the present invention is by from photovoltaic module acquisition surface to each welding position place on its internal cell piece
The induced-current (it can reflect the current value actually flowed through in welding) of generation, and according to the faradic size come directly perceived
Find out abnormal current value, and determine the welding position corresponding to the abnormal current value, and then quickly position the electricity that is out of order
The position of pond piece, when current value is abnormal, generally there is two kinds of possibility：Welding connection on present battery piece there may be different
Often (such as welding rosin joint, sealing-off, fracture), or cell piece itself there may be abnormal (the gate line electrode fracture on such as surface that generates electricity
And can not collected current), both possible situations only now need to be checked one by one, and whole process is fairly simple, convenient, can
Intuitively observe and find the problem by data, the probability of erroneous judgement can be substantially reduced, improve photovoltaic module fault detect
Accuracy and detection efficiency.
It is described above, only it is highly preferred embodiment of the present invention, any formal limitation not is made to the present invention, appoints
What those skilled in the art, without departing from the scope of the technical proposal of the invention, using in the method for the disclosure above
Appearance makes many possible variations and modification to technical solution of the present invention, belongs to the scope of claims protection.
Claims (4)
1. a kind of photovoltaic module fault detection method, it is characterised in that including：
It is powered to photovoltaic module；
The induced electricity flow valuve produced by each welding in photovoltaic module on each cell piece is gathered successively；
The position of fail battery piece is confirmed according to the induced electricity flow valuve collected；
It is powered to photovoltaic module, including：Apply an alternating voltage between the positive and negative exit of photovoltaic module；
The induced electricity flow valuve produced by each welding in photovoltaic module on each cell piece is gathered successively, including：
Inductance type transducer is placed in the transparent cover plate surface of photovoltaic module；
In the case where photovoltaic module is powered, inductance type transducer is moved successively and put to the top of each cell piece, and made described
Inductance type transducer is corresponding with the position of each welding；
The induced electricity flow valuve that the inductance type transducer is collected is read by ammeter；
The position of fail battery piece is confirmed according to the induced electricity flow valuve collected, including：
Record and compare all induced electricity flow valuves of the inductance type transducer collection；
Abnormal induced electricity flow valuve is found, and finds out the welding position corresponding to the abnormal current value.
2. photovoltaic module fault detection method according to claim 1, it is characterised in that：It is powered to photovoltaic module, including：
One sine voltage is applied between the positive and negative exit of photovoltaic module using function generator.
3. photovoltaic module fault detection method according to claim 2, it is characterised in that：The sine voltage is 8-
10V。
4. photovoltaic module fault detection method according to claim 1, it is characterised in that：When in induced electricity flow valuve exist 0
When, then judge that the welding corresponding to the current value is off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510178965.4A CN104753462B (en) | 2015-04-15 | 2015-04-15 | Photovoltaic module fault detection method |
Applications Claiming Priority (1)
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| CN201510178965.4A CN104753462B (en) | 2015-04-15 | 2015-04-15 | Photovoltaic module fault detection method |
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| CN104753462A CN104753462A (en) | 2015-07-01 |
| CN104753462B true CN104753462B (en) | 2017-09-29 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106363318B (en) * | 2016-10-25 | 2018-04-06 | 宁夏小牛自动化设备有限公司 | Welding quality test device and method and stitch welding machine |
| CN108918640B (en) * | 2018-07-10 | 2021-06-18 | 北京博奥瑞科技有限公司 | Device and method for monitoring and repairing cracks of wing member |
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| DE102006037586A1 (en) * | 2006-08-11 | 2008-02-28 | Solarwatt Ag | Device and method for investigating the flow distribution in solar cells and solar modules |
| JP5691816B2 (en) * | 2011-05-11 | 2015-04-01 | 日立金属株式会社 | Abnormality detection device for solar panel |
| CN102608512B (en) * | 2012-04-11 | 2014-07-09 | 上海电力学院 | Method for on-line detecting faults of photovoltaic cells in solar photovoltaic power station on line |
| BR112014029680A2 (en) * | 2012-06-12 | 2017-06-27 | Dow Global Technologies Llc | method to detect a discontinuity in a solar array |
| JP5892513B2 (en) * | 2012-06-22 | 2016-03-23 | 国立研究開発法人産業技術総合研究所 | Method for predicting power generation performance in manufacturing process of solar cell, and optimization method and abnormality detection method in manufacturing process using the same |
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| CB02 | Change of applicant information |
Address after: 215129 Suzhou high tech Zone, Jiangsu, Lu Shan Road, No. 199 Applicant after: Artes sunshine Power Group Co. Ltd. Applicant after: Changshu Canadian Solar Inc. Address before: 215129 Suzhou high tech Zone, Jiangsu, Lu Shan Road, No. 199 Applicant before: Canadian (China) Investment Co., Ltd. Applicant before: Changshu Canadian Solar Inc. |
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| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No. 199, deer mountain road, Suzhou high tech Zone, Jiangsu Province Patentee after: Atlas sunshine Power Group Co.,Ltd. Patentee after: Changshu Artes Sunshine Power Technology Co.,Ltd. Address before: No. 199, deer mountain road, Suzhou high tech Zone, Jiangsu Province Patentee before: CSI SOLAR POWER GROUP Co.,Ltd. Patentee before: Changshu Artes Sunshine Power Technology Co.,Ltd. |
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