CN103063997B - A kind of pilot system and method thereof of testing solar photovoltaic assembly ageing resistance - Google Patents
A kind of pilot system and method thereof of testing solar photovoltaic assembly ageing resistance Download PDFInfo
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- CN103063997B CN103063997B CN201210574298.8A CN201210574298A CN103063997B CN 103063997 B CN103063997 B CN 103063997B CN 201210574298 A CN201210574298 A CN 201210574298A CN 103063997 B CN103063997 B CN 103063997B
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Abstract
The invention discloses a kind of pilot system of testing solar photovoltaic assembly ageing resistance, it comprise for splendid attire electrolytic solution electrolytic tank, be positioned at light source above electrolytic tank, for heating heating arrangement and the power supply of electrolytic solution, electrolytic tank is for groove type structure is for providing the space of arrangement at least one group of test sample, often group test sample is made up of three photovoltaic modulies to be measured, and power electric is connected to often group and tests the frame of wherein two photovoltaic modulies to be measured in sample; Heating arrangement is located on described electrolytic tank; Often group test sample connects power supply and is placed in the electrolytic solution of electrolytic tank with real use state, and by light source and heating arrangement illumination simulation and heat-retaining condition respectively, the photovoltaic module generation galvanic effect to be measured of energising is to test its ageing resistance; Also disclose the test method of above-mentioned pilot system.The present invention can the ageing resistance of test light photovoltaic assembly, differentiates that photovoltaic module implements the effect of ground connection corrosion protection, and guide the actual use of photovoltaic module with this.
Description
Technical field
The present invention relates to crystal silicon solar technical field of photoelectricity test, particularly a kind of pilot system of testing solar photovoltaic assembly ageing resistance, also relates to the test method of this pilot system.
Background technology
Existing solar photovoltaic assembly generally comprises glass plate, EVA layer, the battery strings be made up of monomer solar cell, EVA layer and backboard from top to bottom successively; carry out lamination according to said sequence and adopt laminating technology vacuum hotpressing; glass plate and backboard are bonded in respectively two of battery strings on the surface thus form a solid tabular body; in order to improve the intensity of solar photovoltaic assembly; be convenient to transport and install, usually can adopt frame encapsulation in the surrounding of assembly.
At present, frame many employings aluminum alloy material of solar photovoltaic assembly is made.Because aluminum metal activity is forward, the impact of the factor such as simultaneously to be processed easily makes jamb surface form irregular plane, and, solar photovoltaic assembly is at outside work, add the impact of external environment, easily there is galvanic effect in frame local, galvanic effect refers to the redox reaction occurred in Lu's magnesium silicon and external environment in aluminium alloy.Owing to there is galvanic effect, jamb surface can be corroded, thus acceleration frame is aging.In addition, the photovoltaic system be made up of photovoltaic module often requires ground connection, forms current return with ground, and thus aluminium frame becomes a part for ground return circuit, accelerates the aging of aluminium frame so further, reduces the intensity of photovoltaic module.
According to industry code requirement, photovoltaic module should at least use 25 years under condition out of doors, but in the reliability testing experiment of industry standard, all not mentioned catabiosis that galvanic effect causes for producing after photovoltaic module ground connection is tested.But the catabiosis that galvanic effect causes can not be ignored in the use of photovoltaic module, especially photovoltaic module is arranged on the area (such as acid rain, coastland) of bad environments, galvanic effect is more obvious.Therefore, how identifying that the degree of aging of photovoltaic module and guides assembly to use with the effect differentiating to implement ground connection corrosion protection is the insoluble technical barrier of current photovoltaic industry.
Summary of the invention
First object of the present invention is to provide the pilot system of the test solar photovoltaic assembly ageing resistance that a kind of structure is simple, reliability is high.
Above-mentioned purpose of the present invention is realized by following technical measures: a kind of pilot system of testing solar photovoltaic assembly ageing resistance, it is characterized in that: it comprise for splendid attire electrolytic solution electrolytic tank, be positioned at light source above electrolytic tank, for heating heating arrangement and the power supply of electrolytic solution, described electrolytic tank is for groove type structure is for providing the space of arrangement at least one group of test sample, often group test sample is made up of three photovoltaic modulies to be measured, and described power electric is connected to often group and tests the frame of wherein two photovoltaic modulies to be measured in sample; Described heating arrangement is located on described electrolytic tank; Often group test sample connects power supply and is placed in the electrolytic solution of electrolytic tank with real use state, and by light source and heating arrangement illumination simulation and heat-retaining condition respectively, the photovoltaic module generation galvanic effect to be measured of energising is to test its ageing resistance.
Invention emulates the galvanic effect that photovoltaic module occurs when real use state, can the ageing resistance of test light photovoltaic assembly, and judge that whether photovoltaic module to be measured is qualified by the test of industry photovoltaic module traditional performance, namely adopt traditional performance test as acceptable criterion, differentiate that photovoltaic module implements the effect of ground connection corrosion protection with this, and guide the actual use of photovoltaic module.
The present invention can do following improvement, and described heating arrangement adopts the electric heater with temperature controlling function, and it is 45 ~ 75 DEG C that described electric heater controls electrolyte temperature.
In order to make electrolytic reaction abundant, as a modification of the present invention, described pilot system also comprises several for carrying the aerating device of air in electrolytic tank, described aerating device is communicated with in described electrolytic tank by gas ducting, and the sidewall of described electrolytic tank is provided with the interface be connected with described gas ducting.In electrolytic solution, pass into air, the oxygen needed for electrolytic reaction can be provided, accelerate electrolytic reaction, shorten the test duration, improve testing efficiency.
As a kind of optimal way of the present invention, described electrolytic tank is cuboid, and described interface is distributed on the relative two side of described electrolytic tank in pairs, and the every two docking ports respectively corresponding upper and lower parts being positioned at each photovoltaic module to be measured are set up.Two interfaces in every docking port are oppositely arranged, and when air enters in electrolytic solution, make electrolytic solution be circulation state, can accelerate electrolyte flow, oxygen is evenly distributed, impel electrolytic reaction abundant.
As a further improvement on the present invention, described power acquisition detects the supply unit of electricity function with having, described supply unit automatically cuts off electric power when electricity reaches electricity setting value and sends alerting signal.
As optimal way of the present invention, described electricity setting value is 30 ~ 40KC.
As embodiments of the present invention, described light source adopts lamp or analog light source.Wherein, analog light source specifically can adopt existing stable light source simulator.
As one embodiment of the present invention, the heating temperature range of described heating arrangement is 45 ~ 75 DEG C.Maintain the temperature of photovoltaic module when real use state.
The present invention can have following embodiment, described pilot system also comprises the support for support photovoltaic module to be measured, described support is tower structure, described is set up on the bottom surface of described electrolytic tank, the end face of described support is support face, described support face tilt is arranged with the differing tilt angles coordinating photovoltaic module real use state to be measured, so that photovoltaic module to be measured fully accepts light source irradiation.
Second object of the present invention is the test method of the pilot system providing a kind of above-mentioned test solar photovoltaic assembly ageing resistance.
Above-mentioned purpose of the present invention is realized by following technical measures: a kind of test method of pilot system of above-mentioned test solar photovoltaic assembly ageing resistance, is characterized in that comprising the following steps:
(1) in electrolytic tank, inject electrolytic solution, open heating devices heat electrolytic solution;
(2) get three qualified photovoltaic modulies respectively as photovoltaic module to be measured, these three photovoltaic modulies to be measured are as one group of test sample, and the both positive and negative polarity of each photovoltaic module to be measured connects load respectively;
(3) the frame of two photovoltaic modulies to be measured often organized in test sample connects the both positive and negative polarity of power supply respectively;
(4) photovoltaic module to be measured is placed in the electrolytic solution of electrolytic tank with real use state;
(5) open light source, make light source uniform irradiation on photovoltaic module to be measured;
(6), there is electrolytic reaction until power supply exports electricity reach electricity setting value, powered-down in power-on; Test terminates.
Qualified photovoltaic module refers to that the outward appearance of photovoltaic module and performance meet the demands.
As one embodiment of the present invention, described step (1) in, heating electrolytic solution to 45 ~ 75 DEG C; Described step (6) in, described electricity setting value is 30 ~ 40KC.
Compared with prior art, the present invention has following significant effect:
(1) invention emulates the galvanic effect that photovoltaic module occurs when real use state, can the ageing resistance of test light photovoltaic assembly, and judge that whether photovoltaic module to be measured is qualified by the test of industry photovoltaic module traditional performance, namely adopt traditional performance test as acceptable criterion, differentiate that photovoltaic module implements the effect of ground connection corrosion protection with this, and guide the actual use of photovoltaic module.
(2) pilot system composition of the present invention is simple, reliability is high and easy to implement.
(3) aerating device of the present invention can provide the oxygen needed for electrolytic reaction, accelerates electrolytic reaction, shortens the test duration, improves testing efficiency.
(4) electrolytic solution can be made while passing into air to be circulation state, to accelerate electrolyte flow, oxygen to be evenly distributed, to impel electrolytic reaction abundant.
(5) test method of the present invention is simple, automatically cuts off electric power when adopting supply unit control electricity to reach electricity setting value, therefore easy to operate.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Fig. 1 is test principle figure of the present invention;
Fig. 2 is pilot system of the present invention composition schematic diagram;
Fig. 3 is that photovoltaic module to be measured connects power supply schematic diagram.
Embodiment
As shown in Figure 2,3, it is a kind of pilot system of testing solar photovoltaic assembly ageing resistance of the present invention, it comprise for splendid attire electrolytic solution 11 electrolytic tank 1, be positioned at light source 2 above electrolytic tank 1, for heating heating arrangement and the power supply 20 of electrolytic solution 11, pilot system is disposed in the interior, light source 2 is analog light sources, concrete employing stable light source simulator.Electrolytic tank 1 is for groove type structure is for providing the space of arrangement at least one group of test sample, often group test sample is made up of three photovoltaic modulies 21,22 and 23 to be measured, in the present embodiment, one group is adopted to test sample, the frame 24 of photovoltaic module to be measured is made for aluminum alloy materials, and power electric is connected to the frame 24 of wherein two the adjacent photovoltaic modulies to be measured 21,22 in this group test sample; Electrolytic tank 1 is cuboid, heating arrangement is located on electrolytic tank, heating arrangement adopts the electric heater (not shown in FIG.) with temperature controlling function, electric heater is arranged on the sidewall of electrolytic tank 1, it is 60 DEG C that electric heater controls electrolyte temperature, keep ± 5 DEG C float, to maintain the temperature of photovoltaic module when real use state.Photovoltaic module 21,22 to be measured connects power supply and is placed in the electrolytic solution of electrolytic tank with real use state, and by light source and heating arrangement illumination simulation and heat-retaining condition respectively, the photovoltaic module generation galvanic effect to be measured of energising is to test its ageing resistance.
This pilot system also comprises for carrying the aerating device of air (not shown in FIG.) in electrolytic tank 1, aerating device is communicated with in electrolytic tank 1 by several gas ducting, the sidewall of electrolytic tank 1 is provided with the interface 4 be connected with gas ducting, aerating device can provide the oxygen needed for electrolytic reaction, accelerates electrolytic reaction; Interface 4 is distributed on the relative two side of electrolytic tank 1 in pairs, and the every two docking ports 4 respectively corresponding upper and lower parts being positioned at each photovoltaic module to be measured are set up.Electrolytic solution can be made while passing into air to be circulation state, to accelerate electrolyte flow, oxygen to be evenly distributed, to impel electrolytic reaction abundant.
In the present embodiment, power supply 20 adopts the supply unit having and detect electricity function, and supply unit automatically cuts off electric power when electricity reaches electricity setting value and sends alerting signal, and wherein, electricity setting value is 35KC.
Pilot system also comprises the support 5 for support photovoltaic module to be measured, support 5 is tower structure, support 5 is located on the bottom surface of electrolytic tank 1, the end face of support 5 is support face, support face tilt is arranged with the differing tilt angles coordinating photovoltaic module real use state to be measured, so that photovoltaic module to be measured fully accepts light source irradiation.
A test method for the pilot system of above-mentioned test solar photovoltaic assembly ageing resistance, comprises the following steps:
(1) in electrolytic tank 1, inject electrolytic solution 11, open heating devices heat electrolytic solution to 60 DEG C, and be stabilized in this temperature, floating of basic maintenance ± 5 DEG C;
(2) get three qualified photovoltaic modulies respectively as photovoltaic module to be measured, these three photovoltaic modulies 21,22 and 23 to be measured are as one group of test sample, and qualified photovoltaic module refers to that the outward appearance of photovoltaic module and performance meet the demands, and requires IV, EL test data; The both positive and negative polarity of each photovoltaic module to be measured connects load 6 respectively;
(3) the frame 24 of photovoltaic module 21,22 to be measured is connected respectively the both positive and negative polarity of power supply 20; The both positive and negative polarity of power supply 20 is connected on two wiring points of photovoltaic module 21,22 frame 24 to be measured, in the present embodiment, to make electromotive force even on the corner that these two wiring points are positioned at photovoltaic module 21,22 frame 24 to be measured.In other embodiments, the wiring point on each photovoltaic component frame to be measured is at least two and is symmetric.
(4) photovoltaic module 21,22 and 23 to be measured is placed in the electrolytic solution 11 of electrolytic tank 1 with real use state, be namely fixed by photovoltaic module to be measured on support 5 in a cell, now, photovoltaic module to be measured is horizontal by 30 degree of angles;
(5) open stable light source simulator, make light source uniform irradiation on photovoltaic module to be measured;
(6), there is electrolytic reaction until power supply exports electricity reach electricity setting value 35KC, powered-down in power-on; Test terminates.
Photovoltaic module 21 to be measured is aging for accelerated corrosion, installs in rear galvanic effect ageing environment, particularly aluminium frame making technology not by the part taking the machined surface of safeguard measure and structural stress to concentrate the most for simulated light photovoltaic assembly; Photovoltaic module 22 to be measured is electrical erosion, and check the protection of support and frame for simulating after photovoltaic system is installed, whether inspection safeguard procedures can meet the serviceable life of assembly; Photovoltaic module 23 to be measured is as blank reference, identical with general test design, and photovoltaic module 23 to be measured is spontaneous corrosion, as with reference to test body, to proofread the test accuracy of photovoltaic module 21,22 to be measured.
As shown in Figure 1, test principle of the present invention is: A, B, C of submerging in the electrolytic solution tri-pieces of photovoltaic modulies, and A connects just (+) pole of power supply, and B connects negative (one) pole of power supply, and switches on power, C no power.See table 1:
| Numbering | State | The inflow of electric current and outflow | Intended surface state | Title |
| A | Connect the positive pole of power supply | Flow out | Very large corrosion | Galvanic corrosion |
| B | Connect the negative pole of power supply | Flow into | Slight erosion | Electrically anticorrosion |
| C | Do not connect | Nothing | Corrosion-free | Spontaneous corrosion |
(table 1)
Corrosion electricity calculates:
Q=25Y*365D*24h*3600s*40 μ A=31536C formula (1)
Consider superpotential electric current and the thunder-strike phenomenons such as photovoltaic system, electricity is set in 35KC.
Galvanic corrosion amount: W=Zit → it=Q=W/Z
The electrochemical equivalent of aluminium is 0.93 × 10
-4g/A`s
Obtain: etching extent is 3.7g
The relation of maximum corrosion depth and calendar tenure of use:
D=2.4995int-2.8112 (confidence level 95%)
In formula, d is corrosion depth (mm); T is aircraft calendar limit year (a).
In conjunction with the surface area of the aluminium frame of photovoltaic module, the etching extent calculated is much smaller than 3.7g.
Therefore the quantized value of this experiment: corrosion electricity is defined as 35KC.This value is that photovoltaic module specification calculates routinely, and the electricity setting value with the photovoltaic module of unlike material frame should recalculate by formula (1).
Different photovoltaic module electrical leakage quantity is different, and the aluminum alloy chemically equivalent of different formulations is different, and this test objective detects the performance of photovoltaic module antigen cell degradation, and this adds and sternly designs, and does not affect test findings.
Galvanic corrosion computing formula is as follows:
Galvanic effect etching extent=natural galvanic corrosion+work leakage current chemical corrosion
Extent of corrosion is factor index with the electricity by primary element circuit the most at last,
That is: W=Zit
Work leakage current chemical corrosion amount:
Service time T1=25Y*365D
The unit operational use time according to different territory of use (sunshine), T2=24,18,12,6h/D
Under the weather conditions such as overcast and rainy snow, also need to carry out coefficient check according to designated area.
Thus, the variable set amount of this test is: test period t and by galvanic current I
a, specifically can set according to the condition of pilot system.
The galvanic effect occurred in the actual use procedure of test method simulated light photovoltaic assembly of the present invention, after test terminates, judge that whether photovoltaic module to be measured is qualified by the test of industry photovoltaic module traditional performance again, namely adopt traditional performance test as acceptable criterion, after test, still meet the following conditions, namely qualified:
A) under the test condition of this requirement of experiment, the peak power output decay of photovoltaic module to be measured is no more than the limit 5% of regulation after each mini-test, and tests the empirical value of sample with reference to normal IEC;
B) in process of the test, there is not phenomenon of opening a way in photovoltaic module to be measured;
C) without any serious open defect of IEC61215 regulation;
D), after total Test completes, Insulation test requirement is still met;
E) in each group beginning of test routine, end and after damp heat test completes, the requirement of wet leakage current test is still met.
In other embodiments, the heating temperature range of heating arrangement can be 45 ~ 75 DEG C; Pilot system can also be disposed in the outdoor, and light source adopts lamp; Electricity setting value is 30 ~ 40KC; Electrolytic tank provides the space of arrangement at least one group of test sample, often organizes test sample and is made up of three photovoltaic modulies to be measured.
Embodiments of the present invention are not limited thereto; according to foregoing of the present invention; according to ordinary technical knowledge and the customary means of this area; do not departing under the present invention's above-mentioned basic fundamental thought prerequisite; the present invention can also make the amendment of other various ways, replacement or change, all drops within rights protection scope of the present invention.
Claims (10)
1. test the pilot system of solar photovoltaic assembly ageing resistance for one kind, it is characterized in that: it comprises the electrolytic tank for splendid attire electrolytic solution, be positioned at the light source above electrolytic tank, for heating heating arrangement and the power supply of electrolytic solution, described electrolytic tank is for groove type structure is for providing the space of arrangement at least one group of test sample, often group test sample is made up of three photovoltaic modulies to be measured, described power electric is connected to often group and tests the frame of wherein two photovoltaic modulies to be measured in sample, these two photovoltaic modulies to be measured are respectively the aging and electrical erosion of accelerated corrosion, another photovoltaic module to be measured is spontaneous corrosion, as blank reference, described heating arrangement is located on described electrolytic tank, often group test sample connects power supply and is placed in the electrolytic solution of electrolytic tank with real use state, by light source and heating arrangement illumination simulation and heat-retaining condition respectively, heating arrangement controls electrolyte temperature to maintain the temperature of photovoltaic module when real use state, and the photovoltaic module generation galvanic effect to be measured of energising is to test its ageing resistance.
2. the pilot system of test solar photovoltaic assembly ageing resistance according to claim 1, is characterized in that: described heating arrangement adopts the electric heater with temperature controlling function, and it is 45 ~ 75 DEG C that described electric heater controls electrolyte temperature.
3. the pilot system of test solar photovoltaic assembly ageing resistance according to claim 1 and 2, it is characterized in that: described pilot system also comprises the aerating device for carrying air in electrolytic tank, described aerating device is communicated with in described electrolytic tank by several gas ducting, and the sidewall of described electrolytic tank is provided with the interface be connected with described gas ducting.
4. the pilot system of test solar photovoltaic assembly ageing resistance according to claim 3, it is characterized in that: described electrolytic tank is cuboid, described interface is distributed on the relative two side of described electrolytic tank in pairs, and the every two docking ports respectively corresponding upper and lower parts being positioned at each photovoltaic module to be measured are set up.
5. the pilot system of test solar photovoltaic assembly ageing resistance according to claim 4, it is characterized in that: described power acquisition detects the supply unit of electricity function with having, described supply unit automatically cuts off electric power when electricity reaches electricity setting value and sends alerting signal.
6. the pilot system of test solar photovoltaic assembly ageing resistance according to claim 5, is characterized in that: described electricity setting value is 30 ~ 40KC.
7. the pilot system of test solar photovoltaic assembly ageing resistance according to claim 6, is characterized in that: described light source adopts lamp or analog light source.
8. the pilot system of test solar photovoltaic assembly ageing resistance according to claim 7, it is characterized in that: described pilot system also comprises the support for support photovoltaic module to be measured, described support is tower structure, described is set up on the bottom surface of described electrolytic tank, the end face of described support is support face, described support face tilt is arranged with the differing tilt angles coordinating photovoltaic module real use state to be measured, so that photovoltaic module to be measured fully accepts light source irradiation.
9. use a test method for the pilot system of testing solar photovoltaic assembly ageing resistance described in claim 1, it is characterized in that comprising the following steps:
(1) in electrolytic tank, inject electrolytic solution, open heating devices heat electrolytic solution;
(2) get three qualified photovoltaic modulies respectively as photovoltaic module to be measured, these three photovoltaic modulies to be measured are as one group of test sample, and the both positive and negative polarity of each photovoltaic module to be measured connects load respectively;
(3) the frame of two photovoltaic modulies to be measured often in group test sample connects the both positive and negative polarity of power supply respectively, and these two photovoltaic modulies to be measured are respectively the aging and electrical erosion of accelerated corrosion, and another photovoltaic module to be measured is spontaneous corrosion, as blank reference;
(4) photovoltaic module to be measured is placed in the electrolytic solution of electrolytic tank with real use state;
(5) open light source, make light source uniform irradiation on photovoltaic module to be measured;
(6), there is electrolytic reaction until power supply exports electricity reach electricity setting value, powered-down in power-on; Test terminates.
10. test method according to claim 9, is characterized in that: described step (1) in, heating electrolytic solution to 45 ~ 75 DEG C; Described step (6) in, described electricity setting value is 30 ~ 40KC.
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| CN105651681B (en) * | 2016-03-14 | 2019-09-27 | 中国科学院光电研究院 | Thin-film solar cells natural ageing test method and apparatus |
| CN106130482B (en) * | 2016-08-01 | 2018-01-16 | 江苏大学 | A kind of photovoltaic module is super to accelerate thermal cycling ageing experimental rig |
| CN106774552B (en) * | 2016-12-23 | 2018-11-02 | 江西瑞安新能源有限公司 | Photovoltaic module test method and control method |
| CN109490736B (en) * | 2018-10-18 | 2020-12-08 | 合肥晶澳太阳能科技有限公司 | Solar module's correction and ground connection testing arrangement |
| CN110412068B (en) * | 2019-08-02 | 2021-12-31 | 新疆大学 | Experimental method for testing mine area dust accelerated glacier ablation |
| CN110595742B (en) * | 2019-09-18 | 2021-07-30 | 广东产品质量监督检验研究院（国家质量技术监督局广州电气安全检验所、广东省试验认证研究院、华安实验室） | Method for detecting long-term potential influence of mechanical load on performance of photovoltaic module |
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