CN104753462A - Fault detection method for photovoltaic components - Google Patents
Fault detection method for photovoltaic components Download PDFInfo
- Publication number
- CN104753462A CN104753462A CN201510178965.4A CN201510178965A CN104753462A CN 104753462 A CN104753462 A CN 104753462A CN 201510178965 A CN201510178965 A CN 201510178965A CN 104753462 A CN104753462 A CN 104753462A
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- CN
- China
- Prior art keywords
- photovoltaic module
- welding
- detection method
- fault detection
- electricity flow
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- 238000001514 detection method Methods 0.000 title claims abstract description 33
- 238000003466 welding Methods 0.000 claims description 48
- 230000005611 electricity Effects 0.000 claims description 28
- 230000002159 abnormal effect Effects 0.000 claims description 24
- 238000000034 method Methods 0.000 abstract description 7
- 229910000679 solder Inorganic materials 0.000 abstract 4
- 230000001939 inductive effect Effects 0.000 abstract 3
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 5
- 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 description 5
- 230000007547 defect Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 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 description 5
- 239000011324 bead Substances 0.000 description 2
- 238000005401 electroluminescence Methods 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
- 238000002503 electroluminescence detection Methods 0.000 description 1
- 238000010438 heat treatment 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
Landscapes
- Photovoltaic Devices (AREA)
Abstract
The invention provides a fault detection method for photovoltaic components. The method includes: powering on a photovoltaic component; acquiring the value of inductive current generated on each solder strip on each cell in the photovoltaic component; according to the acquired value of the inductive current, determining the position of the faulted one of the cells. The method has the advantages that the value of the inductive current generated on each solder strip of each cell is acquired from the surface of the photovoltaic component in the power-on state, and the problems such as whether the solder strips have cold solder joint and loose weld and whether the cells have generating anomaly are judged.
Description
Technical field
The present invention relates to technical field of photovoltaic power generation, particularly relate to a kind of photovoltaic module fault detection method.
Background technology
Due to long-term in the face of outdoor adverse circumstances, photovoltaic module is particularly strict for the requirement of reliability and stability, this production process for photovoltaic module proposes harsh requirement, and a new photovoltaic module usually all needs to carry out a large amount of strict detections and certification before listing.But, due to the reason of material, temperature and process aspect, part photovoltaic module still there will be some problems, such as, the problems such as cell piece energy output is uneven, welding abnormal (mainly rosin joint, sealing-off, fracture), these problems are once appear on a certain cell piece, the normal power generation of this cell piece will be had a strong impact on, even having influence on the normal work of whole photovoltaic module, therefore needing to detect it at once when finding that assembly is abnormal, find in time and occur abnormal position.
Existing detection method mainly adopts two kinds of technology, and one is EL (Electro-luminescence, electroluminescence) detection technique, and another kind is IR thermal imaging inspection technology.For EL detection technique, mainly utilize electroluminescent principle, detect the more black place of cell piece (namely illustrating that the electric current that this region flows through is less), but whole testing process must be carried out in total darkness environment, to avoid visible ray on the impact detected, and the precision of the EL camera adopted is also very large on testing result impact, makes testing result sometimes not fully up to expectations.For Infrared Thermography Technology, it is the situation by detecting cell piece heating, find the position of problem cell piece, but for the cell piece that defect is smaller, temperature contrast also can be smaller, cause thermal infrared imager poor effect, and testing result is also easily subject to the impact of heat trnasfer and produces erroneous judgement.
Visible, whether there is abnormal problem for detection welding, cell piece, all there is larger defect in existing two kinds of detection methods, judges by means of only image, cannot judge whether to exist extremely data intuitively.Therefore, necessary a kind of photovoltaic module fault detection method is provided solve above-mentioned technical problem.
Summary of the invention
Technical problem solved by the invention is to provide a kind of photovoltaic module fault detection method, to improve the problem that in prior art, Detection results is not good.
For solving the problems of the technologies described above, the invention provides a kind of photovoltaic module fault detection method, comprising:
Be energized to photovoltaic module;
Gather the induced electricity flow valuve that each welding in photovoltaic module on each cell piece produces successively;
The position of fail battery sheet is confirmed according to the induced electricity flow valuve collected.
Further, to photovoltaic module energising, comprising: adopt function generator to apply a sine voltage between the positive and negative exit of photovoltaic module.
Further, described sine voltage is 8-10V.
Further, to photovoltaic module energising, comprising: between the positive and negative exit of photovoltaic module, apply an alternating voltage.
Further, gather the induced electricity flow valuve that each welding in photovoltaic module on each cell piece produces successively, comprising:
Inductance type transducer is placed in the transparent cover plate surface of photovoltaic module;
When photovoltaic module is energized, inductance type transducer is moved successively the top of putting to each cell piece, and make described inductance type transducer corresponding with the position of each welding;
The induced electricity flow valuve that described inductance type transducer collects is read by ammeter.
Further, confirm the position of fail battery sheet according to the induced electricity flow valuve collected, comprising:
Record and compare all induced electricity flow valuves of collection;
Find abnormal induced electricity flow valuve, and find out this welding position corresponding to abnormal current value.
Further, when having 0 in induced electricity flow valuve, then judge that the welding corresponding to this current value is in off-state.
Photovoltaic module fault detection method of the present invention is by gathering from photovoltaic module surface the induced electricity flow valuve that each cell piece, every root bead band produces in the energized state, judge whether this place's cell piece exists fault according to induced electricity flow valuve, as problems such as welding abnormal welding, cell piece generating exceptions itself.
Accompanying drawing explanation
Fig. 1 is the flow chart of photovoltaic module fault detection method of the present invention.
Fig. 2 is photovoltaic module fault detection method of the present invention application schematic diagram in one embodiment.
Embodiment
Refer to shown in Fig. 1 and Fig. 2, the invention provides a kind of photovoltaic module fault detection method, for detecting the position of abnormal cell piece in photovoltaic module, thus judge the problem whether welding on this abnormal cell piece exists rosin joint, comes off, or judge whether cell piece itself exists the abnormal defect (as thin gate line electrode, main gate line lead rupture etc.) of generating, described photovoltaic module comprises some cell pieces and connects the welding of cell piece, utilize detection method of the present invention, the problem between cell piece and welding can be detected.
As shown in Figure 1, photovoltaic module fault detection method of the present invention, comprises the steps:
S101: be energized to photovoltaic module;
S102: gather the induced electricity flow valuve that each welding in photovoltaic module on each cell piece produces successively;
S103: the position confirming fail battery sheet according to the induced electricity flow valuve collected.
Wherein, in present pre-ferred embodiments, " S101: to photovoltaic module energising ", refer to and adopt function generator to apply a sine voltage between the positive and negative exit of photovoltaic module, voltage is about 8-10V, and because function generator has wider frequency range, and break-make is safer, preferred to the step mode of photovoltaic module in the embodiment of the present invention, shown in Fig. 2.Certainly, in other embodiments, other modes also can be adopted to be energized to photovoltaic module, such as, between the positive and negative exit of photovoltaic module, to apply an alternating voltage, also can meet the testing requirement of detection method.No matter be applied in sine voltage or alternating voltage, after energising, each cell piece in photovoltaic module will become load resistance, and will be interconnected by welding, welding will have electric current flow through.
In present pre-ferred embodiments, " S102: gather the induced electricity flow valuve that each welding in photovoltaic module on each cell piece produces successively ", shown in Fig. 2, mainly comprises:
Inductance type transducer is placed in the transparent cover plate surface of photovoltaic module;
When photovoltaic module is energized, inductance type transducer is moved successively the top of putting to each cell piece, and make described inductance type transducer corresponding with the position of each welding;
The induced electricity flow valuve that described inductance type transducer gathers is read by ammeter, this current value is the induced current that welding produces in the energized state, its large I directly reflects the current value size of actual flow warp in welding, namely induced current greatly then represents that the current value flowed through in welding is also larger, induced current is abnormal then illustrates that the current value flowed through in welding is also abnormal, the current value flowing through each cell piece can be learnt thus, this current value directly reflects on present battery sheet position whether existing defects can help the place, position of failure judgement cell piece.
Because the quantity of cell piece surface welding is relevant with the main gate line number of electrodes on cell piece surface, therefore, cell piece of the present invention mainly contains the cell piece kind of the current main flow such as two grid line cell sheets, three grid line cell sheets, four grid line cell sheets.For two grid line cell sheets, because cell piece surface has two grid lines, thus the welding of its surface soldered also only has two, when utilizing detection method to detect, described inductance type transducer need be placed on respectively on the position corresponding with described in two weldings, so record the induced electricity flow valuve that two weldings produce respectively, in order to easy to detect, two inductance type transducers can be adopted to detect single battery sheet simultaneously, one-time detection can obtain two current values simultaneously, improves detection efficiency with this.Certainly, for three grid line cell sheets, four grid line cell sheets, detection mode is identical, in practice, because the welding quantity on each cell piece surface increases accordingly, welding rosin joint, the probability come off are relatively larger, utilize the position that detection method of the present invention can conveniently be monitored out welding rosin joint, come off.
In present pre-ferred embodiments, " S103: the position confirming fail battery sheet according to the induced electricity flow valuve collected ", mainly comprise: record and compare all induced electricity flow valuves of collection, finding abnormal induced electricity flow valuve, and find out this welding position corresponding to abnormal current value.Principle is herein, if the induced current that welding produces is significantly less than the induced current that other weldings produce, then probably reflects that welding abnormal welding or present battery sheet exist generating abnormal; If no current passes through and makes ammeter cannot collect induced current in welding, then probably reflect that welding has come off or to be disconnected or the cell piece at current welding place exists the problem do not generated electricity.Visible, according to the size of current flowed through in welding, fault, abnormal position can be found fast.In actual applications, if it is 50mA that photovoltaic module records the induced current that a root bead band produces when initial, and find after 1 year that this current value becomes 0 in use, then now can judge this welding there occurs disconnection or sealing-off (cell piece itself generally can not completely lose generating capacity, even if Local Damaged, other positions still have generating capacity, therefore current value is 0 usually can not judge that cell piece does not generate electricity completely), and depend merely in prior art and detect the I-V data of photovoltaic module, be the local defect that cannot reflect a certain cell piece.
In sum, the present invention passes through the induced current (it can reflect the current value of actual flow warp in welding) that on from photovoltaic module acquisition surface to its internal cell sheet, each welding position produces, and find out abnormal current value intuitively according to this faradic size, and determine this welding position corresponding to abnormal current value, and then orient the position of fail battery sheet fast, when current value is abnormal, usually just there are two kinds of possibilities: the welding connection on present battery sheet may exist abnormal (as welding rosin joint, sealing-off, fracture), or cell piece self may exist generating abnormal (as surface gate line electrode fracture and cannot collected current), now only need check these two kinds possible situations one by one, whole process is fairly simple, convenient, observe intuitively by data and find the problem, greatly can reduce the probability of erroneous judgement, improve accuracy and the detection efficiency of photovoltaic module fault detect.
The above; it is only most preferred embodiment of the present invention; not any pro forma restriction is done to the present invention; any those of ordinary skill in the art; do not departing under technical solution of the present invention ambit; utilize the method content of above-mentioned announcement to make many possible variations and modification to technical solution of the present invention, all belong to the scope of claims protection.
Claims (7)
1. a photovoltaic module fault detection method, is characterized in that, comprising:
Be energized to photovoltaic module;
Gather the induced electricity flow valuve that each welding in photovoltaic module on each cell piece produces successively;
The position of fail battery sheet is confirmed according to the induced electricity flow valuve collected.
2. photovoltaic module fault detection method according to claim 1, is characterized in that: to photovoltaic module energising, comprising: adopt function generator to apply a sine voltage between the positive and negative exit of photovoltaic module.
3. photovoltaic module fault detection method according to claim 2, is characterized in that: described sine voltage is 8-10V.
4. photovoltaic module fault detection method according to claim 1, is characterized in that: to photovoltaic module energising, comprising: between the positive and negative exit of photovoltaic module, apply an alternating voltage.
5. photovoltaic module fault detection method according to claim 1, is characterized in that: gather the induced electricity flow valuve that each welding in photovoltaic module on each cell piece produces successively, comprising:
Inductance type transducer is placed in the transparent cover plate surface of photovoltaic module;
When photovoltaic module is energized, inductance type transducer is moved successively the top of putting to each cell piece, and make described inductance type transducer corresponding with the position of each welding;
The induced electricity flow valuve that described inductance type transducer collects is read by ammeter.
6. photovoltaic module fault detection method according to claim 1, is characterized in that: the position confirming fail battery sheet according to the induced electricity flow valuve collected, comprising:
Record and compare all induced electricity flow valuves of collection;
Find abnormal induced electricity flow valuve, and find out this welding position corresponding to abnormal current value.
7. photovoltaic module fault detection method according to claim 6, is characterized in that: when having 0 in induced electricity flow valuve, then judge that the welding corresponding to this current value is in off-state.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510178965.4A CN104753462B (en) | 2015-04-15 | 2015-04-15 | Photovoltaic module fault detection method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510178965.4A CN104753462B (en) | 2015-04-15 | 2015-04-15 | Photovoltaic module fault detection method |
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| CN104753462A true CN104753462A (en) | 2015-07-01 |
| CN104753462B CN104753462B (en) | 2017-09-29 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106363318A (en) * | 2016-10-25 | 2017-02-01 | 宁夏小牛自动化设备有限公司 | Welding quality detection device and method, and stitch welding machine |
| CN108918640A (en) * | 2018-07-10 | 2018-11-30 | 海建平 | A method of for Wing members crack monitoring, repairing device and for Wing members crack monitoring, reparation |
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2015
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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 |
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| CN108918640A (en) * | 2018-07-10 | 2018-11-30 | 海建平 | A method of for Wing members crack monitoring, repairing device and for Wing members crack monitoring, reparation |
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| CN104753462B (en) | 2017-09-29 |
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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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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. |