CN106656042A - Safety detection and service life evaluation method of photovoltaic panel - Google Patents
Safety detection and service life evaluation method of photovoltaic panel Download PDFInfo
- Publication number
- CN106656042A CN106656042A CN201611264087.9A CN201611264087A CN106656042A CN 106656042 A CN106656042 A CN 106656042A CN 201611264087 A CN201611264087 A CN 201611264087A CN 106656042 A CN106656042 A CN 106656042A
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- photovoltaic panel
- photovoltaic
- controller
- temperature
- safety detection
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- 238000001514 detection method Methods 0.000 title claims abstract description 19
- 238000011156 evaluation Methods 0.000 title abstract description 6
- 238000006243 chemical reaction Methods 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 13
- 238000005259 measurement Methods 0.000 claims description 8
- 238000010248 power generation Methods 0.000 abstract description 5
- 241000196324 Embryophyta Species 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 235000005035 ginseng Nutrition 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000002210 silicon-based material Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000002194 synthesizing Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRA-RED 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
Abstract
The invention discloses a safety detection and service life evaluation method of a photovoltaic panel. On the basis of a photovoltaic system comprising the photovoltaic panel, a temperature sensor, an ampere meter, a voltmeter and a controller, a quantized value is calculated by comprehensively considering a working environment parameter, a power generation parameter and an external environment parameter of a photoelectric conversion material of the photovoltaic panel so as to accurately evaluate the service life of the photovoltaic panel and remind a worker to replace the photovoltaic panel in time, thereby facilitating the equipment maintenance of large-scale photovoltaic power plants, reducing the maintenance cost and guaranteeing the power generation efficiency.
Description
Technical field
The invention belongs to solar energy generation technology field, and in particular to a kind of photovoltaic panel safety detection and life appraisal system
System.
Background technology
Photovoltaic generation is one of technological meanses of human use's solar energy.Existing photovoltaic power generation plate is to turn polylith photoelectricity
Conversion materials are integrated in one piece of substrate, are finally assemblied at what is be made on support.In large-scale photovoltaic power plant, can use
The photovoltaic power generation plate of enormous amount is arranged into array, is connected to boosting, convertor equipment by series-parallel circuit and power storage exists
In accumulator or it is connected to the grid.
It is well known that photovoltaic material has certain service life, and because manufacturing process is complicated, each piece of photovoltaic is sent out
Electroplax may all have different service life.Further, since the presence of integrated circuit or other failures, also leads to each piece
The life-span of photovoltaic power generation plate is not quite similar.Also another key factor, is exactly the operational heat problem of semiconductor silicon material, sternly
Ghost image rings the working life of photovoltaic panel.
In sum, there is random working life and terminate in a large amount of photovoltaic panels in large-sized photovoltaic power plant, or based on sending out
Electric benefit considers and should terminate that situation about using.
Although the system for currently existing photovoltaic panel remote failure remote monitoring, normally only whether photovoltaic panel is deposited
Nonserviceable and judged.System and method currently without being detected to photovoltaic panel working life and assessed.
The content of the invention
The purpose of the present invention to the photovoltaic panel working life of enormous amount in large-sized photovoltaic power plant precisely in order to carry out standard
Really assessment, it is proposed that a kind of service life evaluation system and method, while early warning can be carried out to the safety of photovoltaic panel.It is of the present invention
Working life terminate typically refer to photovoltaic panel physical attribute end-of-life or based on power benefit consider the life-span should terminate that.
Present invention firstly provides a kind of photovoltaic panel safety detection and service life evaluation system, mainly including photovoltaic panel, temperature
Sensor, ammeter, voltmeter, controller；
The quantity of the temperature sensor is at least one, positioned at the photovoltaic back, and connects with photoelectric conversion material
Touch and install；The ammeter and voltmeter are separately mounted on the power output terminal of the photovoltaic panel；The temperature sensor,
Ammeter, voltmeter connect respectively controller；The controller persistently receives the temperature signal of temperature sensor, selects the highest temperature
Degree simultaneously compares with fixed threshold；The controller persistently receives electric current, the voltage signal of ammeter and voltmeter, and calculates photovoltaic
The output of plate.
Photovoltaic panel safety detection and service life evaluation system also include thermometer and the illumination meter being connected with controller, use respectively
In real-time measuring environment temperature and solar illuminance.
Used as further optimization technique means, the quantity of the temperature sensor is 3 or more than 3, distributing installation
In photovoltaic back central area.
Present invention also offers a kind of photovoltaic panel safety detection and lifetime estimation method, perform in accordance with the following steps：
Step one, the temperature of temperature sensor measurement photoelectric conversion material, when detection temperature value T exceeds secure threshold T '
When, controller disconnects the output circuit of photovoltaic panel and reports to the police；
Step 2, when detection temperature value T of photoelectric conversion material is less than secure threshold T ', controller according to ammeter and
Photovoltaic panel output current I and magnitude of voltage U of voltmeter measurement in real time calculates the real-time output G of photovoltaic panel, and is entered according to following formula
Row is calculated：
Wherein, δ is the integrated value in 0- Δ T times, T0It is real time environment temperature, L is real-time solar illuminance, and Δ is Δ
Gross output in T time；
Step 3, controller is by the δ obtained by the calculating and δ for prestoring0Compare, if δ≤δ0, then the work of photovoltaic panel is judged
Life-span expires；
Step 4, if δ >=δ0, then repeat step one is to step 3.
Further, in step 2, comprising the measurement to temperature and illuminance.
Further, in step 3, controller disconnects photovoltaic panel output circuit and reports to the police.
The present invention is by the operating temperature parameter of photovoltaic panel photoelectric conversion material, generated output parameter and external environment condition ginseng
Number is considered, and calculates the numerical value of a quantization, with the working life of accurate evaluation photovoltaic panel, remind staff and
Shi Jinhang is changed, and facilitates the plant maintenance in large-sized photovoltaic power plant, reduces maintenance cost, has ensured generating efficiency.
Description of the drawings
Fig. 1 is the photovoltaic system structural schematic block diagram of the present invention；
Fig. 2 is photovoltaic panel and detection device schematic diagram in the present invention；
Fig. 3 is the workflow diagram of the photovoltaic panel safety detection of the present invention and lifetime estimation method.
In figure：1st, photovoltaic panel；2nd, temperature sensor；3rd, ammeter；4th, voltmeter.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings：
Referring to accompanying drawing 1-2, a kind of photovoltaic system of the present invention, mainly include photovoltaic panel 1, temperature sensor 2, ammeter 3,
Voltmeter 4, controller (not shown)；
The quantity of the temperature sensor 2 is at least one, positioned at the back side of the photovoltaic panel 1, and and photoelectric conversion material
Contact is installed；The ammeter 3 and voltmeter 4 are separately mounted on the power output terminal of the photovoltaic panel 1；The temperature is passed
Sensor 2, ammeter 3, voltmeter 4 connect respectively controller；The controller persistently receives the temperature signal of temperature sensor 2,
Select maximum temperature and compare with fixed threshold；The controller persistently receives electric current, the voltage letter of ammeter 3 and voltmeter 4
Number, and calculate the output of photovoltaic panel 1.
As shown in figure 1, further, the photovoltaic system of the present invention also includes thermometer and the illumination being connected with controller
Meter, is respectively used to real-time measuring environment temperature T0With solar illuminance L.
Used as further optimization technique means, the quantity of the temperature sensor is 3 or more than 3, distributing installation
In photovoltaic back central area.
The operation principle and safety detection of the photovoltaic system of the present invention and lifetime estimation method are described in detail as follows.
The temperature of the direct measurement photoelectric conversion material of temperature sensor 2 of the present invention, when detection temperature value T exceeds safety threshold
Value T ' (T >=T ') when, controller directly disconnects the output circuit of photovoltaic panel, makes photovoltaic panel quit work, ensure photovoltaic panel itself
Safety.If during normal work, photoelectric conversion material temperature reaches or beyond the upper limit, then there is operation troubles or the photovoltaic panel life-span arrives
Up to final value, therefore controller is answered alarm staff to be safeguarded or is changed recovery.
When observed temperature value T of photoelectric conversion material is less than secure threshold T ', controller is according to ammeter and voltmeter
Photovoltaic panel output current I and magnitude of voltage U of measurement in real time calculates the real-time output G=IU of photovoltaic panel.Counted according to following formula
Calculate：
Wherein, δ is the integrated value in 0- Δ T times, T0It is real time environment temperature, L is real-time solar illuminance.
Above formula is meant that, in consideration illuminance L to ambient temperature T0And generating output G contribution when, in Δ T
Gross output δ in time.In this formula, it is considered to which it is excessive to calculate data, therefore takes extraction of square root to process, and final δ-value is simultaneously
There is no physical meaning, the assessment parameter related to photovoltaic panel gross output feature in Δ T time is only represented.
According to the theoretical value or empirical value in photovoltaic panel life-span, determine that can reflect a photovoltaic panel synthesis forward efficiency output work
The δ of rate value0Value.
Controller is by the δ obtained by the calculating and δ for prestoring0Compare, if δ≤δ0, then the working life for judging photovoltaic panel arrives
Phase, it is impossible to which positive power benefit of reentrying, controller disconnects the photovoltaic panel output circuit, and alarm staff should be right
Photovoltaic panel is changed, and carries out eliminating recovery.
If δ >=δ0, then illustrate that photovoltaic panel working condition is normal, with the occasion of power benefit, can continue to stably carry out
Opto-electronic conversion.Therefore cycle detection and the assessment of next round can be carried out.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of spirit or essential attributes without departing substantially from the present invention, the present invention can be in other specific forms realized.Therefore, no matter
From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit is required rather than described above is limited, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.Any reference in claim should not be considered as and limit involved claim.
Moreover, it will be appreciated that although this specification is been described by according to embodiment, not each embodiment is only wrapped
Containing an independent technical scheme, this narrating mode of description is only that for clarity those skilled in the art should
Using description as an entirety, the technical scheme in each embodiment can also Jing it is appropriately combined, form those skilled in the art
Understandable other embodiment.
The invention is not restricted to description of the above to embodiment, those skilled in the art according to disclosure of the present invention,
The improvement that need not be carried out through creative work on the basis of the present invention and modification, all should protection scope of the present invention it
It is interior.
Claims (3)
1. a kind of photovoltaic panel safety detection and lifetime estimation method, it is characterised in that
Based on the photovoltaic system for including photovoltaic panel, temperature sensor, ammeter, voltmeter, controller, perform as follows：
Step one, the temperature of temperature sensor measurement photovoltaic panel photoelectric conversion material, when detection temperature value T exceeds secure threshold T '
When, controller disconnects the output circuit of photovoltaic panel and reports to the police；
Step 2, when detection temperature value T of photoelectric conversion material is less than secure threshold T ', controller is according to ammeter and voltage
Photovoltaic panel output current I and magnitude of voltage U of table measurement in real time calculates the real-time output G of photovoltaic panel, and is counted according to following formula
Calculate：
Wherein, δ is the integrated value in 0- Δ T times, T0It is real time environment temperature, L is real-time solar illuminance, and δ is Δ T time
Interior gross output；
Step 3, controller is by the δ obtained by the calculating and δ for prestoring0Compare, if δ≤δ0, then the working life of photovoltaic panel is judged
Expire；
Step 4, if δ >=δ0, then repeat step one is to step 3.
2. a kind of photovoltaic panel safety detection according to claim 1 and lifetime estimation method, it is characterised in that
In step 2, comprising the measurement to temperature and illuminance.
3. a kind of photovoltaic panel safety detection according to claim 1 and lifetime estimation method, it is characterised in that
In step 3, controller disconnects photovoltaic panel output circuit and reports to the police.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611264087.9A CN106656042B (en) | 2016-12-30 | 2016-12-30 | A kind of photovoltaic panel safety detection and lifetime estimation method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611264087.9A CN106656042B (en) | 2016-12-30 | 2016-12-30 | A kind of photovoltaic panel safety detection and lifetime estimation method |
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| CN106656042A true CN106656042A (en) | 2017-05-10 |
| CN106656042B CN106656042B (en) | 2018-11-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112019159A (en) * | 2019-05-28 | 2020-12-01 | 汉能移动能源控股集团有限公司 | Outdoor life evaluation method and device for photovoltaic module |
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| CN106656042B (en) | 2018-11-06 |
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Effective date of registration: 20211124 Address after: 214200 Room 303, block B, creative software building, Yixing Economic and Technological Development Zone, Wuxi City, Jiangsu Province Patentee after: JIANGSU FUYIHE NEW ENERGY TECHNOLOGY Co.,Ltd. Address before: 6 / F, Wenwang Plaza, Wangjiang West Road, hi tech Zone, Hefei City, Anhui Province Patentee before: ANHUI JINGRUN NEW ENERGY Co.,Ltd. |
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