CN107689771A - Photovoltaic module failure diagnosis tool and method - Google Patents
Photovoltaic module failure diagnosis tool and method Download PDFInfo
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- CN107689771A CN107689771A CN201710698998.0A CN201710698998A CN107689771A CN 107689771 A CN107689771 A CN 107689771A CN 201710698998 A CN201710698998 A CN 201710698998A CN 107689771 A CN107689771 A CN 107689771A
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- 238000003745 diagnosis Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims description 12
- 238000012360 testing method Methods 0.000 claims abstract description 60
- 238000007405 data analysis Methods 0.000 claims abstract description 17
- 238000005259 measurement Methods 0.000 claims description 24
- 230000000712 assembly Effects 0.000 claims description 13
- 238000000429 assembly Methods 0.000 claims description 13
- 238000013500 data storage Methods 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 7
- 238000012423 maintenance Methods 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000013467 fragmentation Methods 0.000 description 2
- 238000006062 fragmentation reaction Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 235000021061 dietary behavior Nutrition 0.000 description 1
- 235000006694 eating habits Nutrition 0.000 description 1
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- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
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- 238000010248 power generation Methods 0.000 description 1
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Classifications
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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
- H02S50/10—Testing of PV devices, e.g. of PV modules or single PV cells
-
- 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
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- Photovoltaic Devices (AREA)
- Testing Of Individual Semiconductor Devices (AREA)
Abstract
The present invention relates to a kind of photovoltaic module failure diagnosis tool, its structure includes load blocks, test module and data analysis and processing module, the load blocks include adjustable resistance, the test module includes sensor, the adjustable resistance connecting test module, the test module connects photovoltaic module to be measured, and the Data Analysis Services module is connected with sensor.The present invention designs a kind of new photovoltaic module failure diagnosis tool for the common catastrophe failure of existing photovoltaic power station component, realizes faulty components fast positioning, improves operation maintenance efficiency.
Description
Technical field
The present invention relates to field of photovoltaic power generation, particularly a kind of photovoltaic module failure diagnosis tool and method.
Background technology
In recent years, China's photovoltaic generation obtains explosion type development, and photovoltaic O＆M technology is still at an early stage.Mesh
Preceding photovoltaic plant generally matches somebody with somebody outfit universal meter and a clamp on amperemeter, and above two equipment is not enough to analytic unit characteristic or even entered
Row fault diagnosis.On the other hand, although the photovoltaic special test equipment such as component I-V testers, EL testers being capable of comprehensive diagnostic
Assembly property characteristic, but equipment price is expensive, complex operation, and requirement of the interpretation of result to professional technique is higher, and it is uncomfortable
Daily O＆M for power station.Lack the daily dimension that a kind of simple efficient detection instrument meets photovoltaic plant at present in summary
Shield.
What current built photovoltaic plant broke out on a large scale, can significantly influence the failure of component power includes electricity in terminal box
Large area is hidden caused by pond piece open circuit, the damage of terminal box internal bypass diode, battery combination failure, component fragmentation splits.Wherein
Component fragmentation failure and by directly it has been observed that then needing corresponding measuring instrument and other failures and instrument aid in
Fault diagnosis and location can be completed.Its I-V characteristic of above mentioned problem component is all different from normal component, but currently used open circuit
Voltage method (universal meter survey open-circuit voltage) can only often find that open-circuit voltage caused by cell piece open circuit is decreased obviously failure, for
I-V characteristic caused by a variety of causes distorts then helpless (such as bypass diode damage), causes a large amount of faulty components long-term
Be present in power station and can not timely defect elimination, significantly impact power station operational efficiency.
The content of the invention
The present invention designs a kind of new photovoltaic module failure for the common catastrophe failure of existing photovoltaic power station component
Diagnostic tool.
The failure diagnosis tool makes light by applying appropriate resistive load to photovoltaic module under conditions of irradiation is sufficient
Component operation is lied prostrate in the sloping portion of its I-V characteristic curve, finally according to its measurement result, with reference to a series of criterions, realizes light
Lie prostrate the fault diagnosis of component.In live O＆M generally according to " in header box position failure group string --- group string in position failure group
The sequential search failure of part ", for above-mentioned workflow, test load is divided at least three gears, corresponded to respectively by the present invention
In a group measurement and diagnosis for string, more block assemblies, monolithic element, so that power station operation maintenance personnel is according to a group string --- more block assemblies ---
Monolithic element reduces the scope step by step, realizes faulty components fast positioning, improves operation maintenance efficiency.
Technical scheme is used by the present invention solves above-mentioned technical problem：
A kind of photovoltaic module failure diagnosis tool, its structure include load blocks, test module and Data Analysis Services mould
Block, the load blocks include adjustable resistance, and the test module includes sensor, the adjustable resistance connecting test module,
The test module connects photovoltaic module to be measured, and the Data Analysis Services module is connected with sensor.
Further, the sensor includes voltage sensor and current sensor, and the test module also includes test
Switch；When the test switch is opened, voltage sensor detection open-circuit voltage；During the test switch closure, voltage sensor
Detect test voltage.
Further, the Data Analysis Services module includes data storage, subtracter and comparator, the sensing
Device, subtracter and comparator are sequentially connected, and the data storage is connected with subtracter.
Preferably, also including display module, the display module connects comparator.
Preferably, the adjustable resistance comprises at least third gear resistance, first grade of Standard resistance range is 30~100 Ω, second
Shelves Standard resistance range is 100~500 Ω, and third gear Standard resistance range is 500~2000 Ω.
A kind of photovoltaic module method for diagnosing faults, its step are：
S1 adjustable resistance resistance) is adjusted according to photovoltaic module to be measured, when the adjustable resistance is worked, photovoltaic module work to be measured
In the sloping portion of its I-V characteristic curve；
S2 the measured data of photovoltaic module to be measured) is obtained by test module；
S3) by Data Analysis Services module by the template number in the measured data and data storage of photovoltaic module to be measured
According to progress computing compared with；
S4) according to the computing of Data Analysis Services module compared with output result.
Preferably, measured data in the step S2 includes actual measurement open-circuit voltage, according to actual measurement in the step S1
Open-circuit voltage adjusts adjustable resistance resistance.
Surveyed preferably, the measured data in the step S2 includes actual measurement open-circuit voltage, actual measurement test voltage and actual measurement
Try electric current, the computing in the S3 compared with including：
S31) open-circuit voltage criterion：(VOC·ref-VOC) ＞ 5V；
S32) test voltage criterion：(VC·ref-VC) ＞ 5V；
S33) I-V curve declines slope over 10 criterion：
Wherein VOC.ref、VC.ref、IC.refRespectively template open-circuit voltage, template test voltage and template test electric current；VOC、
VC、ICRespectively survey open-circuit voltage, actual measurement test voltage and actual measurement test electric current；
If meeting the requirement of any of the above criterion, fail result is exported in step S4.
Further, for photovoltaic module to be measured if string group, adjustable resistance Standard resistance range is 500~2000 in the step S1
Ω；If more block assemblies, adjustable resistance Standard resistance range is 100~500 Ω；If monolithic element, adjustable resistance Standard resistance range is
30~100 Ω.
Preferably, also including step S5) if photovoltaic module to be measured is string group, and it is fail result to export, then repeats to walk
Rapid S1 to S4 detects more block assemblies under the string group；If photovoltaic module to be measured is more block assemblies, and it is fail result to export, then weighs
Multiple step S1 to S4 detects the monolithic element under more block assemblies.
The present invention compared with the existing technology has advantages below and effect：
1) cover main flow photovoltaic module catastrophe failure, when having broken away from traditional dependence general-purpose table search failure, can only find to connect
Inside line box the problem of open fault, comprehensive component faults investigation is realized；
2) third gear load and fault diagnosis criterion built in equipment, can automatically select test gear and provide diagnostic result, put
The strong depend-ence horizontal to operation maintenance personnel own service has been taken off, has realized intelligent diagnostics.
3) compared to the photovoltaic detection device of specialty, the tool operation is easy, detection is rapid, while cost is low, simple in construction,
It is particularly suited for the daily O＆M of photovoltaic plant.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the circuit structure diagram of the present invention.
Fig. 3 is the fundamental diagram of Data Analysis Services module.
Label declaration：
The select button 3 of 1 shift knob of photovoltaic module interface 2
The confirming button 6 of 4 mode button of exit button 5
The measurement module 9 of 7 adjustable resistance of display 8
The current sensor 11 of voltage sensor 10 test switch 12
Embodiment
With reference to embodiment, the present invention is described in further detail, following examples be explanation of the invention and
The invention is not limited in following examples.
Embodiment 1：
As shown in figure 1, be photovoltaic module failure diagnosis tool body and photovoltaic module interface 1, photovoltaic module fault diagnosis
Tool body is connected by photovoltaic module interface 1 with photovoltaic module to be measured, shift knob 2 is opened after connection, 1. Setting pattern：It is logical
The Dietary behavior of mode button 5 selection menu is crossed, has automatic mode and manual mode in pattern, automatic mode is automatically selected by instrument
Test load, manual mode by operator select test gear, gear correspond to component block number difference be divided into it is high, medium and low；②
Template is set：Mode button 5 is clicked on, can come in and go out template manually, can also the parameter for measuring normal specimens be directly set into template,
Template data is stored in the data storage in Data Analysis Services module, and it is true that confirming button 6 is clicked on after model selection
Recognize；3. measure：By confirming button 6, equipment, which performs, tests and measures key parameter；4. the result input data analysis processing tested
Module, result is output on display 7 after fault diagnosis.Select button 3 and exit button are additionally provided with other body
4, play a supporting role in above process.
As shown in Fig. 2 adjustable resistance 8, test module 9 and data analysis and processing module, wherein photovoltaic are provided with body
Component interface 1 is connected with test module 9, and voltage sensor 10, current sensor 11, test switch are provided with test module 9
12 and fuse, adjustable resistance 8 be connected in test module 9, adjustable resistance 8 can select suitable gear according to photovoltaic module to be measured
Resistance value, photovoltaic module to be measured is operated in the sloping portion of its I-V characteristic curve.During measurement, test switch 12 is disconnected first
Open, actual measurement open-circuit voltage detected by voltage sensor 10, if being arranged to automatic mode, adjustable resistance 8 according to open-circuit voltage from
It is dynamic to adjust to suitable gear, specific corresponding relation such as following table, wherein through applicant's experimental comparison, when resistance is arranged to following scope
When, it is ensured that " test point " for detecting to obtain is located at the rapid descending branch of electric current of measurand I-V characteristic.
| Load gear | Applicable object | It is applicable voltage | Resistance |
| It is low-grade | Monolithic element | <100V | 30~100 Ω |
| Middle-grade | More block assemblies | 100~300V | 100~500 Ω |
| It is high-grade | Group string | 300~1000V | 500~2000 Ω |
After the completion of gear selection, the closure of test switch 12, actual measurement test voltage is detected by voltage sensor 10, electric current passes
The detection actual measurement test electric current of sensor 11, data above are sent to Data Analysis Services module and carry out computing compared with.
As shown in figure 3, the data obtained of test module 9 is transferred into subtracter, subtracter reads the mould in data storage
Plate value carries out computing therewith, and operation result is transferred into comparator, and the threshold that subtracter is read in data storage is carried out
Compare to obtain whether fail result, as a result export to display 7, wherein specific computing is with being compared as follows：
S31) open-circuit voltage criterion：(VOC·ref-VOC) ＞ 5V；
S32) test voltage criterion：(VC·ref-VC) ＞ 5V；
S33) I-V curve declines slope over 10 criterion：
Wherein VOC.ref、VC.ref、IC.refRespectively template open-circuit voltage, template test voltage and template test electric current；VOC、
VC、ICRespectively survey open-circuit voltage, actual measurement test voltage and actual measurement test electric current；
If meeting the requirement of any of the above criterion, fail result is exported.
If photovoltaic module to be measured is string group, and it is fail result to export, then repeating the above steps, it is more under the string group to detect
Block assembly；If photovoltaic module to be measured is more block assemblies, and it is fail result to export, then repeats the above steps and detect more block assemblies
Under monolithic element.
Furthermore, it is necessary to illustrate, the specific embodiment described in this specification, the shape of its parts and components, it is named
Title etc. can be different.The equivalent or simple change that all construction, feature and principles according to described in inventional idea of the present invention are done, is wrapped
Include in the protection domain of patent of the present invention.Those skilled in the art can be to described specific implementation
Example is made various modifications or supplement or substituted using similar mode, structure without departing from the present invention or surmounts this
Scope as defined in the claims, protection scope of the present invention all should be belonged to.
Claims (10)
- A kind of 1. photovoltaic module failure diagnosis tool, it is characterised in that：Including load blocks, test module and Data Analysis Services Module, the load blocks include adjustable resistance, and the test module includes sensor, the adjustable resistance connecting test mould Block, the test module connect photovoltaic module to be measured, and the Data Analysis Services module is connected with sensor.
- 2. photovoltaic module failure diagnosis tool according to claim 1, it is characterised in that：The sensor passes including voltage Sensor and current sensor, the test module also include test switch；When the test switch is opened, voltage sensor detection Open-circuit voltage；During the test switch closure, voltage sensor detection test voltage.
- 3. photovoltaic module failure diagnosis tool according to claim 2, it is characterised in that：The Data Analysis Services module Including data storage, subtracter and comparator, the sensor, subtracter and comparator are sequentially connected, the data storage Device is connected with subtracter.
- 4. photovoltaic module failure diagnosis tool according to claim 3, it is characterised in that：Also include display module, it is described Display module connects comparator.
- 5. photovoltaic module failure diagnosis tool according to claim 1, it is characterised in that：The adjustable resistance comprises at least Third gear resistance, first grade of Standard resistance range are 30~100 Ω, and second gear Standard resistance range is 100~500 Ω, third gear Standard resistance range For 500~2000 Ω.
- 6. photovoltaic module method for diagnosing faults according to any one of claims 1 to 5, its step are：S1 adjustable resistance resistance) is adjusted according to photovoltaic module to be measured, when the adjustable resistance is worked, photovoltaic module to be measured is operated in it The sloping portion of I-V characteristic curve；S2 the measured data of photovoltaic module to be measured) is obtained by test module；S3) template data in the measured data and data storage of photovoltaic module to be measured is entered by Data Analysis Services module Row computing is compared with；S4) according to the computing of Data Analysis Services module compared with output result.
- 7. photovoltaic module method for diagnosing faults according to claim 6, it is characterised in that：Actual measurement number in the step S2 According to including surveying open-circuit voltage, according to actual measurement open-circuit voltage adjustment adjustable resistance resistance in the step S1.
- 8. photovoltaic module method for diagnosing faults according to claim 6, it is characterised in that：Actual measurement number in the step S2 According to including actual measurement open-circuit voltage, actual measurement test voltage and actual measurement test electric current, computing in the S3 compared with including：S31) open-circuit voltage criterion：(VOC·ref-VOC) ＞ 5V；S32) test voltage criterion：(VC·ref-VC) ＞ 5V；S33) I-V curve declines slope over 10 criterion：Wherein VOC.ref、VC.ref、IC.refRespectively template open-circuit voltage, template test voltage and template test electric current；VOC、VC、IC Respectively survey open-circuit voltage, actual measurement test voltage and actual measurement test electric current；If meeting the requirement of any of the above criterion, fail result is exported in step S4.
- 9. photovoltaic module method for diagnosing faults according to claim 6, it is characterised in that：Photovoltaic to be measured in the step S1 For component if string group, adjustable resistance Standard resistance range is 500~2000 Ω；If more block assemblies, adjustable resistance Standard resistance range is 100 ~500 Ω；If monolithic element, adjustable resistance Standard resistance range is 30~100 Ω.
- 10. photovoltaic module method for diagnosing faults according to claim 9, it is characterised in that：Also include step S5) if to be measured Photovoltaic module is string group, and it is fail result to export, then repeat step S1 to S4 detects more block assemblies under the string group；It is if to be measured Photovoltaic module is more block assemblies, and it is fail result to export, then repeat step S1 to S4 detects the monolithic group under more block assemblies Part.
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| CN201710698998.0A CN107689771B (en) | 2017-08-15 | 2017-08-15 | Photovoltaic module fault diagnosis tool and method |
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2017
- 2017-08-15 CN CN201710698998.0A patent/CN107689771B/en active Active
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| CN201141897Y (en) * | 2007-09-26 | 2008-10-29 | 苏州阿特斯阳光电力科技有限公司 | Portable solar component tester |
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