CN111130457A - Method for determining minimum curling radius of flexible photovoltaic module - Google Patents
Method for determining minimum curling radius of flexible photovoltaic module Download PDFInfo
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- CN111130457A CN111130457A CN201811286081.0A CN201811286081A CN111130457A CN 111130457 A CN111130457 A CN 111130457A CN 201811286081 A CN201811286081 A CN 201811286081A CN 111130457 A CN111130457 A CN 111130457A
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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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Abstract
The invention discloses a method for determining the minimum curling radius of a flexible photovoltaic module, which comprises the following steps: winding the flexible photovoltaic module on a curved surface with a set minimum curvature radius; carrying out an environmental test on the flexible photovoltaic module wound on the curved surface; carrying out reciprocating curling and stretching on the flexible photovoltaic module subjected to the environmental test; performing electrical performance test on the flexible photovoltaic module which is subjected to reciprocating curling and stretching, and judging whether the test result is qualified; and if so, determining the minimum curvature radius of the curved surface as the minimum curling radius of the flexible photovoltaic module. According to the method for determining the minimum curling radius of the flexible photovoltaic module, the flexible photovoltaic module is subjected to an environmental test and is wound on the curved surface with the set minimum curvature radius to be curled and unfolded for multiple times, so that the actual use condition of frequent curling and unfolding of the flexible photovoltaic module is effectively simulated, and the curling radius of the flexible photovoltaic module is accurately determined according to the minimum curvature radius of the curved surface.
Description
Technical Field
The invention relates to the technical field of photovoltaics, in particular to a method for determining the minimum curling radius of a flexible photovoltaic module.
Background
The photovoltaic module is mostly a glass-encapsulated rigid module which can not be bent and curled, but the photovoltaic market still has a part of flexible modules which can be bent or curled and are encapsulated by flexible materials, wherein the flexible modules are generally installed on the surface of a curved object and can be exposed to outdoor conditions for a long time in a curled state for use. However, the flexible photovoltaic module is generally required to be curled and bent within a reasonable curling radius range, and if the reasonable curling radius range is exceeded, the flexible photovoltaic module is difficult to function, and even the flexible photovoltaic module is damaged.
The radius value of the component is determined after the component is curled for one time or multiple times generally, but the radius determining mode lacks a theoretical basis, and whether the determined radius can ensure the function realization and the service life of the flexible photovoltaic component cannot be known.
Disclosure of Invention
The invention aims to provide a method for determining the minimum curling radius of a flexible photovoltaic module, which aims to solve the problems in the prior art, obtain a better curling radius, ensure the normal operation of the flexible photovoltaic module and prolong the service life.
The invention provides a method for determining a minimum curling radius of a flexible photovoltaic module, which comprises the following steps:
step S10, winding the flexible photovoltaic module on a curved surface with a set minimum curvature radius;
step S20, carrying out an environmental test on the flexible photovoltaic module wound on the curved surface;
step S30, carrying out reciprocating curling and stretching on the flexible photovoltaic module subjected to the environmental test;
step S40, performing electrical performance test on the flexible photovoltaic module which is subjected to reciprocating curling and stretching, and judging whether the test result is qualified; if yes, go to step S50;
and step S50, determining the minimum curvature radius of the curved surface as the minimum curling radius of the flexible photovoltaic module.
The method for determining the minimum radius of curvature of the flexible photovoltaic module as described above, wherein preferably, the step S10 specifically includes:
step S11, detecting a first maximum power of the flexible photovoltaic assembly in a flat state;
step S12, winding the flexible photovoltaic module on a first curved surface with a set minimum curvature radius;
step S30 specifically includes:
step S31, carrying out reciprocating curling and stretching on the flexible photovoltaic module at a first set frequency;
step S40 specifically includes:
step S41, detecting a second maximum power of the flexible photovoltaic assembly after the flexible photovoltaic assembly is curled and stretched in a reciprocating mode;
step S42, judging whether the ratio of the amount of the second maximum power attenuated relative to the first maximum power is in a set power attenuation threshold range or not; if yes, go to step S421;
step S421, determining the minimum curvature radius of the first curved surface as the minimum curling radius of the flexible photovoltaic module.
The method for determining the minimum curl radius of the flexible photovoltaic module as described above, wherein preferably, if the determination result of step S42 is no, the method further includes:
step S422, determining whether a ratio of the amount of the second maximum power attenuated relative to the first maximum power is smaller than a lower limit of the power attenuation threshold range;
if so, determining that the minimum radius of curvature of the first curved surface is not the minimum radius of curvature of the flexible photovoltaic assembly, and performing steps S11 to S42 with a second curved surface; the minimum curvature radius of the second curved surface is smaller than that of the first curved surface.
The method for determining the minimum curl radius of the flexible photovoltaic module as described above, wherein preferably, if the determination result of step S42 is no, the method further includes:
step S423, determining whether a ratio of the amount of the second maximum power attenuated relative to the first maximum power is greater than an upper limit of the power attenuation threshold range;
if so, determining that the minimum radius of curvature of the first curved surface is not the minimum radius of curvature of the flexible photovoltaic assembly, and performing steps S11 to S42 with a third curved surface; the minimum curvature radius of the third curved surface is larger than that of the first curved surface.
The method for determining the minimum curl radius of the flexible photovoltaic module is described above, wherein the power attenuation threshold value is preferably in a range of 5% to 10%.
The method for determining the minimum curl radius of the flexible photovoltaic module is described above, wherein the first setting frequency is preferably 40 to 60 times.
The method for determining the minimum radius of curvature of the flexible photovoltaic module as described above, wherein preferably, the step S20 specifically includes:
and step S21, hanging the flexible photovoltaic module wound on the curved surface in an environment test box, and keeping the flexible photovoltaic module in the environment test box for a first set time.
The method for determining the minimum crimp radius of the flexible photovoltaic module is described above, wherein the first time period is preferably 800h to 1200 h.
The method for determining the minimum curl radius of the flexible photovoltaic module as described above, wherein after step S21, the method further comprises:
s211, laying the flexible photovoltaic module subjected to the environmental test on a test bed and standing for a second set time;
and S212, detecting the third maximum power of the flexible photovoltaic assembly after standing.
The method for determining the minimum crimp radius of the flexible photovoltaic module is described above, wherein the second time period is preferably 1h to 4 h.
The method for determining the minimum curl radius of the flexible photovoltaic module as described above, wherein, preferably, before the step S10, the method further comprises:
and step S13, performing reciprocating rolling and stretching on the flexible photovoltaic module before the environmental test.
According to the method for determining the minimum curling radius of the flexible photovoltaic module, the flexible photovoltaic module is subjected to an environmental test, and is wound on the curved surface with the set minimum curvature radius to be curled and unfolded for multiple times, so that the actual use condition of frequent curling and unfolding of the flexible photovoltaic module is effectively simulated, the curling radius of the flexible photovoltaic module is accurately determined according to the minimum curvature radius of the curved surface, and the normal work of the flexible photovoltaic module is ensured.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Fig. 1 is a flowchart of a method for determining a minimum curl radius of a flexible photovoltaic module according to an embodiment of the present invention;
fig. 2 is a flowchart of a method for determining a minimum curl radius of a flexible photovoltaic module according to another embodiment of the present invention;
fig. 3 is a flowchart of a method for determining a minimum curl radius of a flexible photovoltaic module according to another embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.
As shown in fig. 1, an embodiment of the present invention provides a method for determining a minimum curl radius of a flexible photovoltaic module, which includes the following steps:
and step S10, winding the flexible photovoltaic module on a curved surface with a set minimum curvature radius. It will be appreciated that the curved surface is a structural surface having a curved surface, and in particular, the structure having a curved surface may be a spool.
And step S20, carrying out environmental test on the flexible photovoltaic module wound on the curved surface.
Wherein, step S20 specifically includes:
and step S21, hanging the flexible photovoltaic module wound on the curved surface in an environment test box, and keeping the flexible photovoltaic module in the environment test box for a first set time. The first set time period may be 800h to 1200h, and is preferably 1000 h. It should be noted that, the structure with the curved surface should be capable of being mounted in a suspension manner in a test box, and simultaneously has strong corrosion resistance. In order to avoid the flexible photovoltaic module from automatically falling off after being wound on the curved surface, the flexible photovoltaic module can be wound and fixed on the curved surface by adopting an adhesive tape.
In addition, the test chamber can be one of a high temperature and high humidity environment test chamber, a humidity-freezing test chamber, a temperature cycle test chamber or an ultraviolet reliability test chamber, so that the curling radius of the flexible photovoltaic module in different use environments can be determined.
And step S30, performing reciprocating curling and stretching on the flexible photovoltaic module subjected to the environmental test.
S40, performing electrical performance test on the flexible photovoltaic module which is subjected to reciprocating curling and stretching, and judging whether the test result is qualified; if so, the process proceeds to step S50.
And step S50, determining the minimum curvature radius of the curved surface as the minimum curling radius of the flexible photovoltaic module.
Compared with the prior art, the flexible photovoltaic module is wound on the curved surface, and the flexible photovoltaic module is curled and unfolded on the curved surface for multiple times, so that the use condition of frequent curling and unfolding of the flexible photovoltaic module is effectively simulated, the curling radius of the flexible photovoltaic module is accurately determined, and the normal work of the flexible photovoltaic module is ensured.
Of course, it is understood that, in order to simulate the bending state of the flexible photovoltaic module in practical use, the simulation method is not limited to the rolling and unfolding of the flexible photovoltaic module, and the flexible photovoltaic module may be folded and unfolded, and folded and unfolded in multiple layers.
In order to further simulate the state of the flexible photovoltaic module in actual use and improve the matching degree between the test state and the actual use state of the flexible photovoltaic module, before step S10, the method may include:
and step S13, performing reciprocating rolling and stretching on the flexible photovoltaic module before the environmental test.
Specifically, in another embodiment, as shown in fig. 2, step S10 specifically includes:
and step S11, detecting the first maximum power of the flexible photovoltaic assembly in the flat state.
And step S12, winding the flexible photovoltaic module on the first curved surface with the set minimum curvature radius. Wherein, the first curved surface requires a smooth surface to prevent scratching the flexible photovoltaic module.
Step S30 specifically includes:
and step S31, performing reciprocating curling and stretching on the flexible photovoltaic module at a first set frequency. Specifically, the first set frequency may be 40 to 60 times, and in the embodiment, the first set frequency is specifically 50 times.
Step S40 specifically includes:
and step S41, detecting the second maximum power of the flexible photovoltaic module after the flexible photovoltaic module is curled and stretched back and forth.
Step S42, judging whether the ratio of the second maximum power to the first maximum power attenuation amount to the first maximum power is in a set power attenuation threshold range; if so, the process proceeds to step S421. Wherein, the set power attenuation threshold range can be 5% -10%.
Step S421, determining the minimum curvature radius of the first curved surface as the minimum curling radius of the flexible photovoltaic assembly.
Compared with the prior art, the determination of the optimal curling radius of the flexible photovoltaic module is realized by judging the power attenuation conditions of the flexible photovoltaic module before and after curling and stretching, so that the normal work of the flexible photovoltaic module is ensured, and the service life is prolonged.
Further, if the determination result of the step S42 is no, the method further includes:
step S422, judging whether the ratio of the amount of the second maximum power attenuated relative to the first maximum power is smaller than the lower limit of the power attenuation threshold range; if so, determining that the minimum curvature radius of the first curved surface is not the minimum curling radius of the flexible photovoltaic module, and re-executing the steps S11 to S42 by adopting a second curved surface with the minimum curvature radius smaller than that of the first curved surface.
That is, if the percentage of the amount of the second maximum power reduction is less than 5%, the first curved surface needs to be replaced with a second curved surface having a relatively smaller minimum radius of curvature to be retested; the second curved surface with the smaller minimum curvature radius can enable the flexible photovoltaic assembly to bend to a larger extent, so that the attenuation of the flexible photovoltaic assembly can be increased, and the final attenuation percentage can reach the power attenuation threshold range.
Further, if the determination result of the step S42 is no, the method further includes:
step 423, judging whether the ratio of the amount of the second maximum power attenuated relative to the first maximum power is larger than the upper limit of the power attenuation threshold range; if so, determining that the minimum curvature radius of the first curved surface is not the minimum curling radius of the flexible photovoltaic module, adopting a third curved surface with the minimum curvature radius larger than that of the first curved surface, and re-executing the steps S11 to S42.
That is, if the percentage of the amount of the second maximum power reduction is greater than 10%, the first curved surface needs to be replaced with a third curved surface having a relatively larger minimum radius of curvature to be retested; the third curved surface with the larger minimum curvature radius can enable the flexible photovoltaic assembly to bend with a smaller amplitude, so that the attenuation amount of the flexible photovoltaic assembly can be reduced, and the final attenuation percentage can reach the power attenuation threshold range.
Thus, if the ratio of the amount of the second maximum power attenuated relative to the first maximum power is not within the set power attenuation threshold range, the curved surfaces with different minimum curvature radii can be adjusted according to the methods in step S422 and step S423 to finally obtain the optimal curling radius of the flexible photovoltaic module.
In yet another embodiment, as shown in fig. 3, the method for determining the minimum curl radius of the flexible photovoltaic module includes the following steps:
and step S11, detecting the first maximum power of the flexible photovoltaic assembly in the flat state.
And step S12, winding the flexible photovoltaic module on the first curved surface with the set minimum curvature radius.
And step S21, hanging the flexible photovoltaic module wound on the curved surface in an environment test box, and keeping the flexible photovoltaic module in the environment test box for a first set time.
And S211, laying the flexible photovoltaic module subjected to the environmental test on a test bed and standing for a second set time. Wherein, the second set time length can be 1 h-4 h, preferably 2 h.
And S212, detecting the third maximum power of the flexible photovoltaic assembly after standing.
The flexible photovoltaic module after the test is stood for a certain time, so that the influence of the sudden change of the environmental conditions on the subsequent test before and after the test on the flexible photovoltaic module can be prevented. Meanwhile, the maximum power of the flexible photovoltaic assembly after standing is detected, so that the power consistency of the flexible photovoltaic assembly before and after entering the test box can be ensured, and the accuracy of the follow-up curling radius test is ensured.
And step S31, performing reciprocating curling and stretching on the flexible photovoltaic module at a first set frequency.
And step S41, detecting the second maximum power of the flexible photovoltaic assembly after the flexible photovoltaic assembly is curled and stretched back and forth.
Step S42, judging whether the ratio of the second maximum power to the first maximum power attenuation amount to the first maximum power is in a set power attenuation threshold range; if so, the process proceeds to step S421.
Step S421, the minimum curvature radius of the first curved surface is the minimum curling radius of the flexible photovoltaic module.
In an embodiment, step S10 may specifically include:
and S101, attaching and winding the reverse side of the flexible photovoltaic module on the curved surface, and performing reciprocating curling and stretching at a second set frequency.
And S102, the front surface of the flexible photovoltaic module is attached and wound on the curved surface, and the flexible photovoltaic module is curled and stretched in a reciprocating mode at a third set frequency.
From this, through curling respectively and stretching flexible photovoltaic module's tow sides, can guarantee the comprehensive test to flexible photovoltaic module, ensure the accuracy of final radius of curling.
Wherein, the second setting frequency and the third setting frequency can be 40-60 times.
According to the method for determining the minimum curling radius of the flexible photovoltaic module, the flexible photovoltaic module is subjected to an environmental test, and is wound on the curved surface with the set minimum curvature radius to be curled and unfolded for multiple times, so that the actual use condition of frequent curling and unfolding of the flexible photovoltaic module is effectively simulated, the curling radius of the flexible photovoltaic module is accurately determined according to the minimum curvature radius of the curved surface, and the normal work of the flexible photovoltaic module is guaranteed.
The construction, features and functions of the present invention are described in detail in the embodiments illustrated in the drawings, which are only preferred embodiments of the present invention, but the present invention is not limited by the drawings, and all equivalent embodiments modified or changed according to the idea of the present invention should fall within the protection scope of the present invention without departing from the spirit of the present invention covered by the description and the drawings.
Claims (11)
1. A method for determining the minimum curling radius of a flexible photovoltaic module is characterized by comprising the following steps:
step S10, winding the flexible photovoltaic module on a curved surface with a set minimum curvature radius;
step S20, carrying out an environmental test on the flexible photovoltaic module wound on the curved surface;
step S30, carrying out reciprocating curling and stretching on the flexible photovoltaic module subjected to the environmental test;
step S40, performing electrical performance test on the flexible photovoltaic module which is subjected to reciprocating curling and stretching, and judging whether the test result is qualified; if yes, go to step S50;
and step S50, determining the minimum curvature radius of the curved surface as the minimum curling radius of the flexible photovoltaic module.
2. The method for determining the minimum radius of curvature of the flexible photovoltaic module according to claim 1, wherein the step S10 specifically comprises:
step S11, detecting a first maximum power of the flexible photovoltaic assembly in a flat state;
step S12, winding the flexible photovoltaic module on a first curved surface with a set minimum curvature radius;
step S30 specifically includes:
step S31, carrying out reciprocating curling and stretching on the flexible photovoltaic module at a first set frequency;
step S40 specifically includes:
step S41, detecting a second maximum power of the flexible photovoltaic assembly after the flexible photovoltaic assembly is curled and stretched in a reciprocating mode;
step S42, judging whether the ratio of the amount of the second maximum power attenuated relative to the first maximum power is in a set power attenuation threshold range or not; if yes, go to step S421;
step S421, determining the minimum curvature radius of the first curved surface as the minimum curling radius of the flexible photovoltaic module.
3. The method for determining the minimum curl radius of the flexible photovoltaic module of claim 2, wherein if the determination result in the step S42 is negative, the method further comprises:
step S422, determining whether a ratio of the amount of the second maximum power attenuated relative to the first maximum power is smaller than a lower limit of the power attenuation threshold range;
if so, determining that the minimum radius of curvature of the first curved surface is not the minimum radius of curvature of the flexible photovoltaic assembly, and performing steps S11 to S42 with a second curved surface; the minimum curvature radius of the second curved surface is smaller than that of the first curved surface.
4. The method for determining the minimum curl radius of the flexible photovoltaic module of claim 2, wherein if the determination result in the step S42 is negative, the method further comprises:
step S423, determining whether a ratio of the amount of the second maximum power attenuated relative to the first maximum power is greater than an upper limit of the power attenuation threshold range;
if so, determining that the minimum radius of curvature of the first curved surface is not the minimum radius of curvature of the flexible photovoltaic assembly, and performing steps S11 to S42 with a third curved surface; the minimum curvature radius of the third curved surface is larger than that of the first curved surface.
5. The method of claim 2, wherein the power attenuation threshold is in a range of 5% to 10%.
6. The method for determining the minimum curl radius of the flexible photovoltaic module according to claim 2, wherein the first setting frequency is 40-60 times.
7. The method for determining the minimum radius of curvature of the flexible photovoltaic module according to claim 1, wherein the step S20 specifically comprises:
and step S21, hanging the flexible photovoltaic module wound on the curved surface in an environment test box, and keeping the flexible photovoltaic module in the environment test box for a first set time.
8. The method of claim 7, wherein the first duration is between 800h and 1200 h.
9. The method for determining the minimum curl radius of a flexible photovoltaic module of claim 7, wherein after step S21, the method further comprises:
s211, laying the flexible photovoltaic module subjected to the environmental test on a test bed and standing for a second set time;
and S212, detecting the third maximum power of the flexible photovoltaic assembly after standing.
10. The method of claim 9, wherein the second period of time is between 1h and 4 h.
11. The method for determining the minimum curl radius of a flexible photovoltaic module of claim 1, wherein before step S10, the method further comprises:
and step S13, performing reciprocating rolling and stretching on the flexible photovoltaic module before the environmental test.
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Effective date of registration: 20210222 Address after: Unit 611, unit 3, 6 / F, building 1, yard 30, Yuzhi East Road, Changping District, Beijing 102208 Applicant after: Zishi Energy Co.,Ltd. Address before: Room 403, unit 2, building C, Dongfang Shengshi, Jinpai community, Buji street, Longgang District, Shenzhen, Guangdong 518112 Applicant before: Shenzhen yongshenglong Technology Co.,Ltd. |
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Application publication date: 20200508 |