CN110492845A - A kind of high efficient two-sided solar photovoltaic assembly detection device and detection method - Google Patents
A kind of high efficient two-sided solar photovoltaic assembly detection device and detection method Download PDFInfo
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- CN110492845A CN110492845A CN201910854128.7A CN201910854128A CN110492845A CN 110492845 A CN110492845 A CN 110492845A CN 201910854128 A CN201910854128 A CN 201910854128A CN 110492845 A CN110492845 A CN 110492845A
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- 238000001514 detection method Methods 0.000 title claims abstract description 38
- 239000000523 sample Substances 0.000 claims description 27
- 230000003595 spectral effect Effects 0.000 claims description 24
- 238000012937 correction Methods 0.000 claims description 15
- 238000012360 testing method Methods 0.000 claims description 8
- 238000012544 monitoring process Methods 0.000 claims description 7
- 238000005259 measurement Methods 0.000 claims description 6
- 230000005855 radiation Effects 0.000 claims description 6
- 238000001228 spectrum Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000008030 elimination Effects 0.000 claims description 3
- 238000003379 elimination reaction Methods 0.000 claims description 3
- 238000002834 transmittance Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 2
- 238000012806 monitoring device Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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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
- H02S50/15—Testing of PV devices, e.g. of PV modules or single PV cells using optical means, e.g. using electroluminescence
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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 kind of high efficient two-sided solar photovoltaic assembly detection device and detection methods, comprising: braced frame, the braced frame include left frame and correct frame；Upper support bar, both ends are connect with left frame and correct frame respectively；Lower support bar, it is below upper support bar and parallel with upper support bar, and both ends are connect with left frame and correct frame respectively；Slide locating mechanism for photovoltaic module to be fixed between upper support bar and lower support bar, and may make photovoltaic module along the axial movement of upper support bar and lower support bar.The present invention can accurately carry out the detection work of high efficient two-sided solar photovoltaic assembly, and the accuracy of high efficient two-sided solar photovoltaic assembly detection can be effectively ensured by largely using and verifying in the present invention.
Description
Technical Field
The invention belongs to the technical field of photovoltaics, and particularly relates to a high-efficiency double-sided solar photovoltaic module detection device and a detection method.
Background
The double-sided solar cell module is a solar cell module which can convert light energy into electric energy on both the front side and the back side. When sunlight irradiates the double-sided component, part of light can be reflected to the back of the double-sided component by the surrounding environment, and the part of light is absorbed by the cell, so that certain contribution is generated to the photocurrent and the efficiency of the cell, and the power generation gain of the component is further improved.
With the increase of double-sided solar cell modules in the market, the number of N-type modules or P-type high-efficiency modules is large, and the limitation of a testing method, the performance of the solar cell module is difficult to test accurately, so that a user cannot make a correct evaluation.
Disclosure of Invention
In order to solve the problems, the invention provides an efficient double-sided solar photovoltaic module detection device which can accurately test the performance of a solar photovoltaic module.
The technical scheme of the invention is as follows: the utility model provides a high-efficient two-sided solar PV modules detection device, includes:
a support frame including a left frame and a right frame;
the two ends of the upper supporting rod are respectively connected with the left frame and the right frame;
the lower supporting rod is positioned below the upper supporting rod and is parallel to the upper supporting rod, and two ends of the lower supporting rod are respectively connected with the left frame and the right frame;
and the sliding positioning mechanism is used for fixing the photovoltaic module between the upper support rod and the lower support rod and enabling the photovoltaic module to move along the axial direction of the upper support rod and the lower support rod.
When the photovoltaic module is installed, two sides of the photovoltaic module are respectively connected with the upper supporting rod and the lower supporting rod through the sliding positioning mechanism, so that the photovoltaic module is installed between the upper supporting rod and the lower supporting rod, and the photovoltaic module can move along the axial direction of the upper supporting rod and the lower supporting rod. The sliding positioning mechanism has various structural forms, and can be realized by adopting various conventional structures, for example, the sliding positioning mechanism can comprise a plurality of sliding connecting pieces, each sliding connecting piece comprises a connecting part detachably connected with the photovoltaic component and a sliding part slidably sleeved on the supporting rod (the upper supporting rod or the lower supporting rod), the detachable connection with the photovoltaic component has various detachable connection modes, and various conventional modes can be adopted, for example, a clamping connection mode can be adopted.
Preferably, the support frame further comprises an upper frame and a lower frame, the upper frame is provided with a standard battery capable of moving in the X direction and/or the Y direction, and the lower frame is provided with a monitoring battery. The standard battery can move in the X direction and the Y direction according to the test requirement, and various modes for realizing the movement of the standard battery in the X direction and the Y direction are provided, for example, a mode of a sliding block and a sliding rail can be adopted, and when the position of the standard battery needs to be adjusted, the sliding block connected with the standard battery can move along the sliding rail.
Preferably, the photovoltaic module temperature monitoring device further comprises an infrared probe used for monitoring and monitoring the temperature of the photovoltaic module, and the infrared probe is arranged on the upper supporting rod.
Preferably, the left frame comprises a left slide rail, the right frame comprises a right slide rail, and two ends of the upper supporting rod are respectively connected with the left slide rail and the right slide rail and can slide relative to the left slide rail and the right slide rail. The size of the area between the upper support rod and the lower support rod can be adjusted, the upper support rod can be driven to move upwards or downwards along the left slide rail and the right slide rail, and after the required width is reached, the connecting ends of the upper support rod and the left slide rail and the right slide rail are locked, so that the upper support rod is prevented from continuously moving along the left slide rail and the right slide rail. When the upper support rod is connected with the left slide rail and the right slide rail, the two ends of the upper support rod can be respectively provided with the slide blocks, then the slide blocks at the two ends are respectively connected with the left slide rail and the right slide rail in a sliding manner, and when the upper support rod does not need to be moved, the slide blocks can be locked through the locking parts, so that the movement is prevented. The invention can also be provided with a pulley component connected with the sliding block to realize the balance control of the upper supporting rod.
The invention also provides a detection method by utilizing the high-efficiency double-sided solar photovoltaic module detection device, which comprises the following steps:
the detection area of the detection device is subjected to a spectral radiation nonuniformity test, the average value of all points is calculated, the standard cell is positioned at the average spectral radiation point, and the correction is carried out according to the formula (1):
ICF＝IP-WPVS/IP-AVE*I
(1)；
wherein, ICFFor the corrected current, IP-WPVSAt wpvs operating point current, IP-AVEAverage current of all points in the detection area, wherein I is current;
the temperature of the photovoltaic module is collected through the infrared probe, and then temperature coefficient correction is carried out on the I-V characteristic according to formulas (2) and (3):
I2＝I1+Isc[G2/G1-1]+α(T2-T1)
(2)；
V2＝V1-RS(I2-I1)-KI2(T2-T1)+β(T2-T1)
(3)；
wherein,
I1、V1-coordinates of the measured characteristic points;
I2、V2-modifying the coordinates of the corresponding points of the characteristic;
Isc-measured short circuit current value of the sample;
G1-measured irradiance of a standard solar cell;
G2-standard irradiance of a standard solar cell;
T1-the measured temperature of the sample;
T2-standard temperature, or other desired temperature;
α and β — temperature coefficients of current and voltage of the sample at standard or other desired irradiance, and over the temperature range of interest (α is positive and β is negative);
Rs-internal series resistance of the sample;
k-curve correction factor.
The I-V characteristic of the photovoltaic module is divided and scanned for 1 time in the forward direction and the reverse direction, and the number of times of division is calculated according to a formula (4) to eliminate the capacitance effect:
(Pbackward-Pforward)/(Pbackward+Pforwa rd)*100％＜0.5％
(4)；
wherein Pbackward is reverse power; pford forward Power
The elimination of reflection and transmission is carried out according to the formula (5):
wherein,
isc, rear is the reverse side short-circuit current;
t (λ): a transmittance distribution;
r (λ): a reflectance distribution;
Srear(λ): a reverse spectral response distribution;
Sfront(λ): a front spectral response distribution;
isc, rear: reverse side short circuit current;
isc, front short-circuit current.
And (3) correcting the spectrum mismatch of the front surface or the back surface of the high-efficiency double-sided solar photovoltaic module according to the formulas (6) and (7):
ISC，front or rear＝Imeas，front or rear/MMfront or rear
(7)；
wherein,
MMfront or rear: front or back spectral mismatch factors;
Eref(λ): standard solar spectrum (AM1.5) distribution;
Ssample，front or rear(λ): the spectral response of the front or the back of the tested sample is obtained;
Emeas(λ): spectral distribution of the measured solar simulator;
Sref(λ): the spectral response of the WPVS standard;
ISC，front or rear: a front or back short circuit current correction value;
Imeas，front or rear: front or back side short circuit current measurements;
correction ISC、Impp、PmxaThe detection data of the solar photovoltaic module finishes the detection of the I-V characteristic of the high-efficiency double-sided solar photovoltaic module.
Compared with the prior art, the invention has the beneficial effects that:
the invention can accurately carry out the detection work of the high-efficiency double-sided solar photovoltaic module, and can effectively ensure the detection accuracy of the high-efficiency double-sided solar photovoltaic module through a large amount of use and verification.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a graph of the effect results.
Detailed Description
As shown in fig. 1, the present invention includes:
a support frame 1, the support frame 1 comprising a left frame 11 and a right frame 12;
an upper support rod 2, both ends of which are respectively connected with the left frame 11 and the right frame 12;
a lower support rod 3 which is positioned below the upper support rod 2 and is parallel to the upper support rod 2, and both ends of which are respectively connected with the left frame 11 and the right frame 12;
and the sliding positioning mechanism 4 is used for fixing the photovoltaic module between the upper support rod 2 and the lower support rod 3 and enabling the photovoltaic module to move along the axial direction of the upper support rod 2 and the lower support rod 3.
When the photovoltaic module is installed, two sides of the photovoltaic module are respectively connected with the upper supporting rod 2 and the lower supporting rod 3 through the sliding positioning mechanism 4, so that the photovoltaic module is installed between the upper supporting rod 2 and the lower supporting rod 3, and the photovoltaic module can move along the axial direction of the upper supporting rod 2 and the lower supporting rod 3. The structure of the sliding positioning mechanism 4 in the invention has various forms, and can be realized by adopting various conventional structures, for example, the sliding positioning mechanism 4 can comprise a plurality of sliding connecting pieces, each sliding connecting piece comprises a connecting part detachably connected with the photovoltaic module and a sliding part slidably sleeved on the supporting rod (the upper supporting rod 2 or the lower supporting rod 3), the detachable connection with the photovoltaic module has various forms, and various conventional manners can be adopted, for example, a clamping manner can be adopted.
As shown in fig. 1, the supporting frame 1 of the present invention further includes an upper frame 13 and a lower frame 14, wherein the upper frame 13 is provided with a standard battery 5 capable of moving in the X direction and/or the Y direction, and the lower frame 14 is provided with a monitoring battery 6. The standard battery 5 can also move in the X direction and the Y direction according to the test requirement, and various ways for realizing the movement of the standard battery 5 in the X direction and the Y direction are available, for example, a slide block and a slide rail way can be adopted, and when the position of the standard battery 5 needs to be adjusted, the slide block connected with the standard battery 5 can move along the slide rail.
As shown in fig. 1, the photovoltaic module temperature monitoring device further comprises an infrared probe for monitoring and controlling the temperature of the photovoltaic module, wherein the infrared probe is arranged on the upper support rod 2.
The left frame 11 comprises a left slide rail, the right frame 12 comprises a right slide rail, and two ends of the upper support rod 2 are respectively connected with the left slide rail and the right slide rail and can slide relative to the left slide rail and the right slide rail. The size of the area between the upper supporting rod 2 and the lower supporting rod 3 can be adjusted, the upper supporting rod 2 can be driven to move upwards or downwards along the left sliding rail and the right sliding rail, and after the required width is reached, the connecting ends of the upper supporting rod 2 and the left sliding rail and the right sliding rail are locked, so that the upper supporting rod 2 is prevented from continuously moving along the left sliding rail and the right sliding rail. When the upper support rod 2 is connected with the left slide rail and the right slide rail, the two ends of the upper support rod 2 can be respectively provided with the slide blocks, then the slide blocks at the two ends are respectively connected with the left slide rail and the right slide rail in a sliding manner, and when the upper support rod 2 does not need to be moved, the slide blocks can be locked through the locking parts, so that the movement is prevented. The invention can also be provided with a pulley component connected with the sliding block to realize the balance control of the upper supporting rod 2.
The invention also provides a detection method by utilizing the high-efficiency double-sided solar photovoltaic module detection device, which comprises the following steps:
the detection area of the detection device is subjected to a spectral radiation nonuniformity test, the average value of all points is calculated, the standard cell is positioned at the average spectral radiation point, and the correction is carried out according to the formula (1):
ICF＝IP-WPVS/IP-AVE*I
(1)；
wherein, ICFFor the corrected current, IP-WPVSAt wpvs operating point current, IP-AVEAverage current of all points in the detection area, wherein I is current;
the temperature of the photovoltaic module is collected through the infrared probe, and then temperature coefficient correction is carried out on the I-V characteristic according to formulas (2) and (3):
I2＝I1+Isc[G2/G1-1]+α(T2-T1)
(2)；
V2＝V1-RS(I2-I1)-KI2(T2-T1)+β(T2-T1)
(3)；
wherein,
I1、V1-coordinates of the measured characteristic points;
I2、V2-modifying the coordinates of the corresponding points of the characteristic;
Isc-measured short circuit current value of the sample;
G1-measured irradiance of a standard solar cell;
G2-standard irradiance of a standard solar cell;
T1-the measured temperature of the sample;
T2-standard temperature, or other desired temperature;
α and β — temperature coefficients of current and voltage of the sample at standard or other desired irradiance, and over the temperature range of interest (α is positive and β is negative);
Rs-internal series resistance of the sample;
k-curve correction factor.
The I-V characteristic of the photovoltaic module is divided and scanned for 1 time in the forward direction and the reverse direction, and the number of times of division is calculated according to a formula (4) to eliminate the capacitance effect:
(Pbackward-Pforward)/(Pbackward+Pforward)*100％＜0.5％(4)；
wherein Pbackward is reverse power; pford forward Power
The elimination of reflection and transmission is carried out according to the formula (5):
wherein,
isc, rear is the reverse side short-circuit current;
t (λ): a transmittance distribution;
r (λ): a reflectance distribution;
Srear(λ): a reverse spectral response distribution;
Sfront(λ): a front spectral response distribution;
isc, rear: reverse side short circuit current;
isc, front short-circuit current.
And (3) correcting the spectrum mismatch of the front surface or the back surface of the high-efficiency double-sided solar photovoltaic module according to the formulas (6) and (7):
ISC，front or rear＝Imeas，front or rear/MMfront or rear
(7)；
wherein,
MMfront or rear: front or back spectral mismatch factors;
Eref(λ): standard solar spectrum (AM1.5) distribution;
Ssample，front or rear(λ): the spectral response of the front or the back of the tested sample is obtained;
Emeas(λ): spectral distribution of the measured solar simulator;
Sref(λ): the spectral response of the WPVS standard;
ISC，front or rear: a front or back short circuit current correction value;
Imeas，front or rear: front or back side short circuit current measurements;
correction ISC、Impp、PmxaThe detection data of the solar photovoltaic module finishes the detection of the I-V characteristic of the high-efficiency double-sided solar photovoltaic module.
The method is used for carrying out standard measurement on 2 high-efficiency double-sided solar photovoltaic modules and Fraunhofer-ISE (Fraunhofer-ISE) of Germany, the standard measurement result is shown in figure 2, and the standard measurement result is within a tolerance range of +/-0.30 percent, so that the method is reliably verified.
Claims (5)
1. The utility model provides a high-efficient two-sided solar PV modules detection device which characterized in that includes:
a support frame including a left frame and a right frame;
the two ends of the upper supporting rod are respectively connected with the left frame and the right frame;
the lower supporting rod is positioned below the upper supporting rod and is parallel to the upper supporting rod, and two ends of the lower supporting rod are respectively connected with the left frame and the right frame;
and the sliding positioning mechanism is used for fixing the photovoltaic module between the upper support rod and the lower support rod and enabling the photovoltaic module to move along the axial direction of the upper support rod and the lower support rod.
2. The efficient double-sided solar photovoltaic module detection apparatus as claimed in claim 1, wherein the supporting frame further comprises an upper frame and a lower frame, the upper frame is provided with a standard cell capable of moving in the X direction and/or the Y direction, and the lower frame is provided with a monitoring cell.
3. The efficient double-sided solar photovoltaic module detection device as claimed in claim 1, further comprising an infrared probe for monitoring and controlling the temperature of the photovoltaic module, wherein the infrared probe is disposed on the upper support rod.
4. The efficient double-sided solar photovoltaic module detection device as claimed in claim 1, wherein the left frame comprises a left slide rail, the right frame comprises a right slide rail, and two ends of the upper support rod are respectively connected with the left slide rail and the right slide rail and can slide relative to the left slide rail and the right slide rail.
5. A detection method for a high-efficiency double-sided solar photovoltaic module is characterized by comprising the following steps:
the detection area of the detection device is subjected to a spectral radiation nonuniformity test, the average value of all points is calculated, the standard cell is positioned at the average spectral radiation point, and the correction is carried out according to the formula (1):
ICF＝IP-WPVS/IP-AVE*I (1)；
wherein, ICFFor the corrected current, IP-WPVSAt wpvs operating point current, IP-AVEAverage current of all points in the detection area, wherein I is current;
the temperature of the photovoltaic module is collected through the infrared probe, and then temperature coefficient correction is carried out on the I-V characteristic according to formulas (2) and (3):
I2＝I1+Isc[G2/G1-1]+α(T2-T1) (2)；
V2＝V1-RS(I2-I1)-KI2(T2-T1)+β(T2-T1) (3)；
wherein,
I1、V1-coordinates of the measured characteristic points;
I2、V2-modifying the coordinates of the corresponding points of the characteristic;
Isc-measured short circuit current value of the sample;
G1-measured irradiance of a standard solar cell;
G2-standard irradiance of a standard solar cell;
T1-the measured temperature of the sample;
T2-a standard temperature;
α and β -current and voltage temperature coefficients of the sample at standard or desired irradiance, and within a desired temperature range;
Rs-internal series resistance of the sample;
k-curve correction factor;
the I-V characteristic of the photovoltaic module is divided and scanned for 1 time in the forward direction and the reverse direction, and the number of times of division is calculated according to a formula (4) to eliminate the capacitance effect:
(Pbackward-Pforward)/(Pbackward+Pforward)*100％＜0.5％ (4)；
wherein Pbackward is reverse power; pford forward Power
The elimination of reflection and transmission is carried out according to the formula (5):
wherein,
isc, rear is the reverse side short-circuit current;
t (λ): a transmittance distribution;
r (λ): a reflectance distribution;
Srear(λ): a reverse spectral response distribution;
Sfront(λ): a front spectral response distribution;
isc, rear: reverse side short circuit current;
isc, front short-circuit current;
and (3) correcting the spectrum mismatch of the front surface or the back surface of the high-efficiency double-sided solar photovoltaic module according to the formulas (6) and (7):
ISC，front or rear＝Imeas，front or rear/MMfront or rear (7)；
wherein,
MMfront or rear: front or back spectral mismatch factors;
Eref(λ): standard solar spectrum (AM1.5) distribution;
Ssample，front or rear(λ): the spectral response of the front or the back of the tested sample is obtained;
Emeas(λ): spectral distribution of the measured solar simulator;
Sref(λ): the spectral response of the WPVS standard;
ISC，front or rear: a front or back short circuit current correction value;
Imeas，front or rear: front or back side short circuit current measurements;
correction ISC、Impp、PmxaThe detection data of the solar photovoltaic module finishes the detection of the I-V characteristic of the high-efficiency double-sided solar photovoltaic module.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110991033A (en) * | 2019-11-29 | 2020-04-10 | 河海大学常州校区 | Method and system for calculating power output of double-sided photovoltaic module |
| CN110991033B (en) * | 2019-11-29 | 2022-08-16 | 河海大学常州校区 | Method and system for calculating power output of double-sided photovoltaic module |
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