CN106226357A - A kind of photovoltaic module superficial dust detection device and method - Google Patents
A kind of photovoltaic module superficial dust detection device and method Download PDFInfo
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- CN106226357A CN106226357A CN201610708794.6A CN201610708794A CN106226357A CN 106226357 A CN106226357 A CN 106226357A CN 201610708794 A CN201610708794 A CN 201610708794A CN 106226357 A CN106226357 A CN 106226357A
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- 239000000428 dust Substances 0.000 title claims abstract description 96
- 238000001514 detection method Methods 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000013517 stratification Methods 0.000 claims abstract description 77
- 238000004140 cleaning Methods 0.000 claims abstract description 26
- 230000005855 radiation Effects 0.000 claims abstract description 8
- 230000000712 assembly Effects 0.000 claims abstract description 7
- 238000000429 assembly Methods 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 69
- 238000011010 flushing procedure Methods 0.000 claims description 19
- 239000007921 spray Substances 0.000 claims description 16
- 238000012360 testing method Methods 0.000 claims description 16
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 4
- 238000005538 encapsulation Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000003599 detergent Substances 0.000 claims 1
- 238000004080 punching Methods 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 7
- 230000000087 stabilizing effect Effects 0.000 abstract description 3
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
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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
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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
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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- Photovoltaic Devices (AREA)
Abstract
The invention discloses a kind of photovoltaic module surface dirt detection device and method, this device uses the low profile photovoltaic assembly of two or more sets high stables as total solar radiation sensor, one of which low profile photovoltaic assembly cleans the most automatically, other group low profile photovoltaic assemblies are consistent with needing the photovoltaic system medium-and-large-sized assembly mounted angle monitoring dust stratification degree, gather the current and voltage signals of different small photovoltaic module, calculate the dust stratification degree without the clean low profile photovoltaic assembly rinsed, warning signal is sent according to dust stratification degree, data foundation is provided for operation maintenance such as the assembly cleanings in system.
Description
Technical field
The present invention relates to a kind of photovoltaic module superficial dust detection device and method, belong to solar radiation measuring technology neck
Territory.
Background technology
Along with the quick growth of photovoltaic system installed capacity, the operation maintenance of photovoltaic system gradually receives much concern, reasonably
Photovoltaic system operation maintenance can significantly promote photovoltaic system efficiency, increases the generated energy of unit capacity, reduction degree electricity cost.
Various unit exception, performance degradation, inefficacy, dust stratification can be there is, the problem such as block in photovoltaic system running.Wherein
The cleaning of photovoltaic module dust stratification is one of most important work in photovoltaic operation maintenance.Distributed with roof for large-sized photovoltaic power station
Photovoltaic plant, rationally finds photovoltaic module to need to clear up the time point of dust stratification, photovoltaic plant is promoted generated energy at low cost extremely
Close important.
For convenience of photovoltaic plant operation maintenance, the most generally by photovoltaic plant, often string or each photovoltaic module generate electricity
Efficiency is monitored, and as sent warning signal when finding and differ greatly with theoretical efficiency, makes the photovoltaic plant attendant can be very
Find problem points soon.By irradiation intensity, the revision to photovoltaic system efficiency of the photovoltaic module temperature, reduce environmental condition to system
The impact of efficiency change, makes photovoltaic system efficiency abnormality alarming judge more accurate.In conjunction with the pattern of classification alarm, imitate in system
Rate is greatly reduced situation, it is possible to monitoring in time and control, facilitates emergent management, reduces potential safety hazard；System effectiveness slightly reduces
Time, the accurate feedback of information, operation maintenance, detection analysis on Necessity for system provide data foundation.
Summary of the invention
The technical problem to be solved is the defect overcoming prior art, it is provided that a kind of photovoltaic module superficial dust
Detection device and method, it is achieved dust stratification degree alerts.
For solving above-mentioned technical problem, the present invention provides a kind of photovoltaic module superficial dust detection device, use one group clean
Clean low profile photovoltaic assembly detects dust stratification with low profile photovoltaic assembly as total solar radiation sensor with one or more groups, and described inspection
Surveying dust stratification low profile photovoltaic assembly the most placed side by side with clean low profile photovoltaic assembly, wherein, clean low profile photovoltaic assembly is regular
Automatically clean, keep clean as reference component, the photovoltaic detecting dust stratification low profile photovoltaic assembly with needing to detect dust stratification degree
In system power be 80-500Wp large-sized photovoltaic assembly install consistent towards inclination angle；
Described clean low profile photovoltaic assembly and detection dust stratification low profile photovoltaic assembly are placed on support housing, described cleaning
Low profile photovoltaic assembly carries out the most automatically cleaning by clean water water tank；Clean water water tank includes spray water storage tank and flushing water receipts
Header, supports housing tip and is connected to storage tank of spraying water, and supports housing bottom and is connected to flushing water collecting box, and water spray storage tank is high
Water in low profile photovoltaic assembly, water spray storage tank is flowed out by automatic water jetting outlet, and cleaning low profile photovoltaic assembly rinses
Water collection tank is less than low profile photovoltaic assembly, and after cleaning, water flows into flushing water collecting box；
Often group low profile photovoltaic assembly all with resistance by connection wired in series together with, resistance two ends again by connection wire
Connecting voltage acquisition and Chip Microcomputer A/D conversion module, described voltage acquisition measures resistance both end voltage with Chip Microcomputer A/D conversion module
And be converted to digital quantity.
Aforesaid low profile photovoltaic assembly is the power packaged solar cell in 0.2-5Wp scope.
Aforesaid clean low profile photovoltaic assembly cleans for every 0.1-4 hour the most automatically.
Aforesaid clean low profile photovoltaic assembly and detection dust stratification low profile photovoltaic assembly use same-type solar cell with
Encapsulating material encapsulation forms.
After water cleaning low profile photovoltaic assembly in aforesaid water spray storage tank, flow into flushing water collecting box, then pass through
Water in flushing water collecting box is extracted into water spray storage tank by water pump.
Aforesaid water spray storage tank and every 10-30 days routine cleaning of flushing water collecting box, change clean water.
The method of photovoltaic module superficial dust detection device detection photovoltaic module superficial dust, comprises the following steps:
1) dust stratification low profile photovoltaic assembly and clean low profile photovoltaic assembly will be detected, medium-and-large-sized with photovoltaic system to be detected
The same direction of photovoltaic module with as inclination angle place, by clean water water tank topped up with water；
2) it is R by each low profile photovoltaic assembly and resistancesResistant series together；
3) detection is without detection dust stratification low profile photovoltaic assembly external load both end voltage V rinsed1, detection has the clean of flushing
Clean low profile photovoltaic assembly external load both end voltage V2；
4) according to resistance value Rs, calculate detection dust stratification low profile photovoltaic assembly and flow through the electric current I of resistance1, calculate clean small-sized
Photovoltaic module flows through the electric current I of resistance2；
5) detection dust stratification with low profile photovoltaic assembly with clean low profile photovoltaic assembly under standard test condition, test it and pass through
Resistance RsOperating current be I01, I02；
6) the dust stratification degree D without the clean low profile photovoltaic assembly rinsed is calculated by below equationj:
Dj=(I2-I1×I02/I01)/I2× 100%；
According to many group detection dust stratification low profile photovoltaic assemblies, the most often group detection dust stratification low profile photovoltaic assembly correspondence is tested
The dust stratification degree of different angle or position, detects the dust stratification dust stratification degree D of low profile photovoltaic assembly njn:
Djn=(I2–In×I02/I0n)/I2× 100%
InThe electric current of resistance, I is flowed through for detection dust stratification low profile photovoltaic assembly n0nFor detecting dust stratification under standard test condition
Operating current with low profile photovoltaic assembly n；
7) warning signal is sent according to dust stratification degree.
Aforesaid dust stratification degree 4-10% is low level alarm；Dust stratification degree 10%-20% is the alarm of middle rank；Dust stratification degree is more than
20% is high-level alarm.
The beneficial effect that the present invention is reached: the present invention is directed to large-sized photovoltaic assembly operating process and can there is dust stratification etc. and ask
Topic, uses the low profile photovoltaic assembly of two or more sets high stables as total solar radiation sensor, one of which low profile photovoltaic group
Part cleans the most automatically, keeps clean as reference component, and another group widgets is installed with the medium-and-large-sized photovoltaic module of photovoltaic system
Inclination angle is consistent, normal dust stratification, by gathering different small photovoltaic module current and voltage signals, and computation module dust stratification situation, quantify
Data also pass through computer network, it is achieved dust stratification degree alerts, and provide data to depend on for operation maintenance such as the assembly cleanings in system
According to.
Accompanying drawing explanation
Fig. 1 is the external structure schematic diagram of photovoltaic module superficial dust of the present invention detection device；
Fig. 2 is low profile photovoltaic assembly circuit connection diagram；
Fig. 3 is photovoltaic module superficial dust detection method flow chart of the present invention.
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings.Following example are only used for clearly illustrating the present invention
Technical scheme, and can not limit the scope of the invention with this.
As it is shown in figure 1, the photovoltaic module superficial dust detection device of the present invention uses the power of two or more sets high stables
At the low profile photovoltaic assembly (packaged solar cell) of 0.2-5Wp as total solar radiation sensor, one of which small light
Photovoltaic assembly cleans for every 0.1-4 hour the most automatically, keeps clean as reference component, and other group low profile photovoltaic assemblies are examined with needs
Survey the large-sized photovoltaic assembly that power in the photovoltaic system of dust stratification degree is 80-500Wp and install consistent towards inclination angle.Fig. 1 detects
Dust stratification low profile photovoltaic assembly 101 is the most placed side by side with clean low profile photovoltaic assembly 102, and two low profile photovoltaic assemblies use same
Type solar cell forms with encapsulating material encapsulation, and electrical property is close, and difference is less than 5%；Two low profile photovoltaic assemblies are placed on and prop up
On support housing 105,103 points of two parts of clean water water tank, support housing tip and be connected to storage tank of spraying water, support housing bottom phase
Being linked as flushing water collecting box, water spray storage tank is exported by automatic water jetting higher than low profile photovoltaic assembly, the water in water spray storage tank
104 flow out, cleaning low profile photovoltaic assembly 102, and flushing water collecting box is less than low profile photovoltaic assembly, and after cleaning, water flows into and rinses
Water collection tank, then by water pump, the water in flushing water collecting box is extracted into water spray storage tank, allow the water to recycle, water storage of spraying water
Case and every 10-30 days routine cleaning of flushing water collecting box, change clean water.
This detection device, by low profile photovoltaic assembly circuit as shown in Figure 2, gathers each low profile photovoltaic assembly electric current electricity
Pressure signal, and accurately calculate the radiation data of each low profile photovoltaic component planes.As in figure 2 it is shown, circuit structure is, by small-sized
Photovoltaic module 201 is cascaded by being connected wire 202 with resistance, and resistance two ends are again by connecting wire connection voltage acquisition
With Chip Microcomputer A/D conversion module 204, detection obtains resistance both end voltage.
Further, amassed with the detection of the most cleaned normal dust stratification by the clean low profile photovoltaic assembly of contrast routine cleaning
The ash radiation data of the plane of low profile photovoltaic assembly, calculates the dust stratification degree of this photovoltaic system mount point, it is provided that quantized data,
Pass through computer network, it is achieved dust stratification degree alerts.According to the current/voltage deviation system cleaned with do not clean low profile photovoltaic assembly
Surely alert grade scale, determine alarm grade, when not cleaning low profile photovoltaic module testing voltage less than cleaning low profile photovoltaic assembly
The 4-10% of test voltage, alerts for low level (green)；Small-sized less than cleaning when not cleaning low profile photovoltaic module testing voltage
The 10-20% of photovoltaic module test voltage, alerts for middle rank (yellow)；It is less than when not cleaning low profile photovoltaic module testing voltage
Clean the 20-100% of low profile photovoltaic component voltage, alert for high-level (red).
As it is shown on figure 3, the photovoltaic module superficial dust detection method of the present invention comprises the following steps:
1. will detect in dust stratification low profile photovoltaic assembly 101 and clean low profile photovoltaic assembly 102, with photovoltaic system to be detected
The same direction of large-sized photovoltaic assembly with as inclination angle place, generally towards south orientation.By clean water water tank 103 topped up with water, and every 5-30
It makes regular check on the water yield.Automatic water sprinkler systme is by the every 0.1-4 hour clean low profile photovoltaic of water spray cleaning of automatic water jetting outlet 104
Assembly 102.
2. it is R by each low profile photovoltaic assembly and resistancesResistant series together, by test resistance both end voltage V,
Low profile photovoltaic assembly can be obtained and flow through the electric current I of resistance.The size of electric current I with reach assembly through low profile photovoltaic assembly glass
The solar irradiation intensity of middle battery surface becomes near-linear relation.
3. detection is without detection dust stratification low profile photovoltaic assembly external load both end voltage V rinsed1, detection has the clean of flushing
Clean low profile photovoltaic assembly external load both end voltage V2。
4. according to resistance value Rs, calculate detection dust stratification low profile photovoltaic assembly and flow through the electric current I of resistance1, calculate clean small-sized
Photovoltaic module flows through the electric current I of resistance2。
5., before this detection device uses out of doors, detection dust stratification low profile photovoltaic assembly is being marked with clean low profile photovoltaic assembly
Quasi-test condition (1000W/m2, AM1.5 spectrum, 25 DEG C) under, testing it by the operating current of resistance is I01, I02。
6. calculate the dust stratification degree D without the clean low profile photovoltaic assembly rinsed by below equationj:
Dj=(I2-I1×I02/I01)/I2× 100%
According to many group detection dust stratification low profile photovoltaic assemblies, the most often group detection dust stratification low profile photovoltaic assembly correspondence is tested
The dust stratification degree of different angle or position, detects the dust stratification dust stratification degree D of low profile photovoltaic assembly njn:
Djn=(I2–In×I02/I0n)/I2× 100%
InThe electric current of resistance, I is flowed through for detection dust stratification low profile photovoltaic assembly n0nFor detecting dust stratification under standard test condition
Operating current with low profile photovoltaic assembly n.
7. send warning signal (green: dust stratification degree 4-10% according to dust stratification degree；Yellow signal: dust stratification degree 10%-
20%；Danger signal: dust stratification degree is more than 20%).
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For Yuan, on the premise of without departing from the technology of the present invention principle, it is also possible to make some improvement and deformation, these improve and deformation
Also should be regarded as protection scope of the present invention.
Claims (8)
1. photovoltaic module superficial dust detection device, it is characterised in that use one group of cleaning low profile photovoltaic assembly and a group
Or how group detects dust stratification with low profile photovoltaic assembly as total solar radiation sensor, and described detection dust stratification low profile photovoltaic assembly
The most placed side by side with clean low profile photovoltaic assembly, wherein, clean low profile photovoltaic assembly cleans the most automatically, keeps clean conduct
Reference component, detection dust stratification low profile photovoltaic assembly and need detect dust stratification degree photovoltaic system in power be 80-500Wp's
Large-sized photovoltaic assembly is installed consistent towards inclination angle；Described clean low profile photovoltaic assembly and detection dust stratification low profile photovoltaic assembly are placed
Supporting on housing, described clean low profile photovoltaic assembly carries out the most automatically cleaning by clean water water tank；Clean water water tank bag
Include water spray storage tank and flushing water collecting box, support housing tip and be connected to storage tank of spraying water, support housing bottom and be connected to punching
Wash water collecting box, water spray storage tank is flowed out, clearly by automatic water jetting outlet higher than low profile photovoltaic assembly, the water in water spray storage tank
Detergent low profile photovoltaic assembly, flushing water collecting box is less than low profile photovoltaic assembly, and after cleaning, water flows into flushing water collecting box；
Often group low profile photovoltaic assembly all with resistance by connecting together with wired in series, resistance two ends are again by connection wire connection
Voltage acquisition and Chip Microcomputer A/D conversion module, described voltage acquisition and Chip Microcomputer A/D conversion module are measured resistance both end voltage and turn
It is changed to digital quantity.
A kind of photovoltaic module superficial dust detection device the most according to claim 1, it is characterised in that described low profile photovoltaic
Assembly is the power packaged solar cell in 0.2-5Wp scope.
A kind of photovoltaic module superficial dust detection device the most according to claim 1, it is characterised in that described cleaning is small-sized
Photovoltaic module cleans for every 0.1-4 hour the most automatically.
A kind of photovoltaic module superficial dust detection device the most according to claim 1, it is characterised in that clean low profile photovoltaic
Assembly and detection dust stratification low profile photovoltaic assembly use same-type solar cell to form with encapsulating material encapsulation.
A kind of photovoltaic module superficial dust detection device the most according to claim 1, it is characterised in that described water spray water storage
After water cleaning low profile photovoltaic assembly in case, flow into flushing water collecting box, then by water pump by flushing water collecting box
Water is extracted into water spray storage tank.
A kind of photovoltaic module superficial dust detection device the most according to claim 1, it is characterised in that described water spray water storage
Case and every 10-30 days routine cleaning of flushing water collecting box, change clean water.
7. detect device detection photovoltaic module surface according to the photovoltaic module superficial dust described in claim 1 to 6 any one
The method of dust stratification, it is characterised in that comprise the following steps:
1) dust stratification low profile photovoltaic assembly and clean low profile photovoltaic assembly will be detected, with the medium-and-large-sized photovoltaic of photovoltaic system to be detected
The same direction of assembly with as inclination angle place, by clean water water tank topped up with water；
2) it is R by each low profile photovoltaic assembly and resistancesResistant series together；
3) detection is without detection dust stratification low profile photovoltaic assembly external load both end voltage V rinsed1, detection has the cleaning of flushing little
Type photovoltaic module external load both end voltage V2；
4) according to resistance value Rs, calculate detection dust stratification low profile photovoltaic assembly and flow through the electric current I of resistance1, calculate clean low profile photovoltaic
Assembly flows through the electric current I of resistance2；
5) detection dust stratification with low profile photovoltaic assembly with clean low profile photovoltaic assembly under standard test condition, test it and pass through resistance
RsOperating current be I01, I02；
6) the dust stratification degree D without the clean low profile photovoltaic assembly rinsed is calculated by below equationj:
Dj=(I2-I1×I02/I01)/I2× 100%；
According to many group detection dust stratification low profile photovoltaic assemblies, the most often group detection dust stratification low profile photovoltaic assembly correspondence test difference
The dust stratification degree of inclination angle or position, detects the dust stratification dust stratification degree D of low profile photovoltaic assembly njn:
Djn=(I2–In×I02/I0n)/I2× 100%
InThe electric current of resistance, I is flowed through for detection dust stratification low profile photovoltaic assembly n0nFor detecting dust stratification under standard test condition with little
The operating current of type photovoltaic module n；
7) warning signal is sent according to dust stratification degree.
The method of detection photovoltaic module superficial dust the most according to claim 7, it is characterised in that dust stratification degree 4-10% is
Low level alerts；Dust stratification degree 10%-20% is the alarm of middle rank；Dust stratification degree is high-level alarm more than 20%.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106656039A (en) * | 2016-11-17 | 2017-05-10 | 上海普天中科能源技术有限公司 | Photovoltaic assembly surface cleanliness evaluation device |
| CN109283226A (en) * | 2018-11-29 | 2019-01-29 | 北京国电龙源环保工程有限公司 | The dust stratification measuring device and its measurement method on denitrating catalyst surface |
| CN109374645A (en) * | 2018-12-27 | 2019-02-22 | 山东建筑大学 | Photovoltaic panel dust detection system and method |
| CN109976356A (en) * | 2019-04-28 | 2019-07-05 | 河海大学常州校区 | A kind of automatic O&M control method of robot cleaner for photovoltaic module |
| CN110108536A (en) * | 2019-06-18 | 2019-08-09 | 中国计量大学 | A kind of standard board manufacturing method compared for settled date mirror area gray scale detection |
| CN110266269A (en) * | 2019-03-19 | 2019-09-20 | 友达光电股份有限公司 | The dirty measurement method in surface and measuring device |
| CN117607160A (en) * | 2024-01-23 | 2024-02-27 | 南京旗云中天科技有限公司 | Surface area ash detection method for photovoltaic module, ash accumulation sensor and monitoring system |
| CN117740816A (en) * | 2023-11-10 | 2024-03-22 | 南京旗云中天科技有限公司 | Method, sensor and system for improving detection precision of dust deposition pollution ratio of photovoltaic module |
| CN117740816B (en) * | 2023-11-10 | 2024-06-21 | 南京旗云中天科技有限公司 | Method, sensor and system for improving detection precision of dust deposition pollution ratio of photovoltaic module |
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| CN110108536B (en) * | 2019-06-18 | 2021-10-01 | 中国计量大学 | Standard plate manufacturing method for heliostat area gray level detection and comparison |
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