CN103472430A - Solar simulator irradiation non-uniformity and instability test system - Google Patents
Solar simulator irradiation non-uniformity and instability test system Download PDFInfo
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Abstract
The invention discloses a solar simulator irradiation non-uniformity and instability test system which comprises four calibrated standard photovoltaic cells serving as illumination sensors, a data acquisition unit connected with the four standard photovoltaic cells, and a computer connected with the data acquisition unit. One standard photovoltaic cell is fixed at the edge of the effective irradiation surface of a tested solar simulator, and the other three standard photovoltaic cells are arranged in three left and right adjacent equal cells of the effective irradiation surface of the solar simulator in sequence; the three standard photovoltaic cells are manually and sequentially moved in a non-overlapped mode from the upper left corner of the effective irradiation surface of the solar simulator by using the three cells as a unit to cover all rows of the effective irradiation surface of the solar simulator. Signals detected by the system are subjected to data processing to obtain irradiation non-uniformity values and instability values of the solar simulator, and the levels of the values are estimated according to international standards IEC60904-9: 2007.
Description
Technical field
The present invention relates to a kind of checkout equipment.
Background technology
Solar simulator is the spectrum of simulating nature sunshine and the equipment of irradiance, and the unit for electrical property parameters and the permanance that are widely used in photovoltaic device are measured, and according to mode of operation, can be divided into stable state type and the large class of impulse type two.The impulse type solar simulator is general only for the I-V feature measurement of photovoltaic device, and stable state type solar simulator can be used for photovoltaic device I-V feature measurement and permanance is measured.Ground is measured solar simulator grade used with photovoltaic device and is estimated successively according to spectral distribution, irradiation nonuniformity, three indexs of irradiation instability.
Along with increasing solar simulator comes into operation at photovoltaic industry, the performance evaluation of solar simulator becomes a big hot topic research direction of current measuring technology.Patent 201020577557.9 adopts a standard photovoltaic cell to be gathered as optical sensor, in the effective irradiation face in institute's division unit lattice by the manual mobile irradiation nonuniformity of measuring in turn.The signal collected sends computing machine by a data collector to after AD transforms.Use this device to be tested, can not evade the caused deviation of variation of each flash of light irradiance value of impulse type solar simulator, thereby cause test result inaccurate, can not estimate well the unevenness index of solar simulator.
Summary of the invention
The objective of the invention is to overcome the shortcoming of prior art, propose the test macro of a kind of solar simulator irradiation nonuniformity and instability.The present invention can test solar simulator irradiation nonuniformity and instability more accurately, there is the photosignal conversion, on the basis of high precision high sampling rate independence AD hardware, by adopting polylith standard photovoltaic cell as the optical sensor synchronous acquisition, made up the impact of different time points solar simulator irradiation instability on the unevenness test.This test macro small volume, be easy to carry, and is applicable to dissimilar solar simulator.
In order to achieve the above object, the technical solution used in the present invention is:
Test macro of the present invention comprises:
Four standard photovoltaic cells through demarcating, described standard photovoltaic cell is as the optical sensor of test macro of the present invention;
A data collecting unit, this data acquisition unit is connected with four standard photovoltaic cells, and the signal that native system is gathered carries out the AD conversion;
A computing machine, this computing machine is connected by the usb data line with data acquisition unit, and native system is provided data to show and processes;
Native system is used for testing solar simulator irradiation nonuniformity and instability value, and draws the performance rate of this index.
Described standard photovoltaic battery size is 2cm * 2cm, and material is polysilicon or monocrystalline silicon.Described standard photovoltaic cell, through demarcating, has stable calibration value.This standard photovoltaic cell is made according to the regulation of international standard IEC60904-2:2007.
Described data acquisition unit comprises a four-way independence AD data collecting card and four high-accuracy measuring resistances that resistance is 0.1 ohm; Four passages of described data collecting card and high-accuracy measuring resistance are relations one to one.
Described data collecting card has four passages, and each passage comprises positive and negative two interfaces, and the positive and negative interface of each passage connects respectively the two ends of corresponding measuring resistance.Described data collecting card is for gathering the magnitude of voltage at resistance two ends, and the voltage value signal gathered sends computing machine to after converting digital signal to by data collecting card AD.
Described data acquisition unit comprises four input channels, an output channel.
The input channel of described data acquisition unit is connected with the standard photovoltaic cell by the high-frequency electrical cable, and four input channels are connected with four standard photovoltaic cells respectively.Described output channel is connected with computing machine by the high speed USB data line with shading ring.
Described computing machine demonstrates data and curves by the signal collected, and processes irradiation evenness value and the instability value that draws solar simulator through data, and according to international standard, IEC60904-9:2007 makes ranking.
The course of work of the present invention is:
After determining the effective irradiation face size of tested solar simulator, according to the IEC60904-9:2007 international standard, the effective irradiation face is divided into to some cells.Standard photovoltaic cell wherein is fixed on to the edge of tested solar simulator effective irradiation face, in the adjacent decile cell in three left and right that its excess-three piece standard photovoltaic cell is arranged in solar simulator effective irradiation face successively.Do three standard photovoltaic cells to be moved as a whole, from the upper left corner of solar simulator effective irradiation face, from left to right in the first row cell, take three lattice as a unit manual ordinal shift overlappingly not, after having covered the first row cell, then with same order, at the second row cell, manually move, the like, all row of covering solar simulator effective irradiation face.If decile cell from left to right is not three integral multiple, can when moving to the rightmost side, reduce by one or two standard photovoltaic cells, guarantee just in time to cover all cells in solar simulator effective irradiation face, avoid and survey.
Will be in the decile cell of each solar simulator effective irradiation face the current signal that produces of standard photovoltaic cell, the current signal produced together with the standard photovoltaic cell that is fixed on tested solar simulator effective irradiation face edge, send data acquisition unit to by the high-frequency electrical cable.
Be converted into voltage signal through the standard precision resistance in data acquisition unit, gathered by data collecting card, and, after AD transforms, send digital signal to computing machine by the usb data line.
By Analytical Data Process with Computer, draw respectively irradiation nonuniformity and the instability of this solar simulator, and make the performance rate evaluation of this index.
The advantage that compared to the prior art the present invention had is:
1. the present invention adopts a standard photovoltaic cell to be fixed on the edge of tested solar simulator effective irradiation face, and other three standard photovoltaic cells are in the moving mobile irradiance value of measuring in turn of the tested solar simulator effective irradiation face division unit lattice expert of institute.The irradiance value that the standard photovoltaic cell of three standard photovoltaic cells the irradiance value warp recorded and the effective irradiation face edges that are fixed on tested solar simulator records compares, revises, obtain the solar simulator unevenness, evaded the variation along with the different irradiance values of test duration point of each flash of light of impulse type solar simulator or steady-state simulation device, the flashing caused is spent the impact on the unevenness test generation surely.
2. the present invention is not only applicable to the impulse type solar simulator, and is applicable to the stable state solar simulator.
3. the present invention adopts three standard photovoltaic cells to move simultaneously, has improved testing efficiency, has simplified testing process.
4. the present invention adopts four tunnel independence AD data acquisition units, has realized the four-way synchronous acquisition, has improved measuring accuracy.
5. the present invention adopts the data acquisition unit up to the 1M/s sample frequency, can within the limited time period, increase sampling number, has improved the data sample quantity collected in the unit interval section, has improved acquisition precision.
6. the present invention adopts the high precision measuring resistance of stable performance, has improved data and has transformed precision.
7. the computing machine that the present invention adopts not only can show data, can also carry out the robotization processing to the data sample, according to result of calculation critical parameter index grade, and automatically generates test report, effectively raises test efficiency, has saved human cost.
The accompanying drawing explanation
Fig. 1 structural representation of the present invention, in figure: C11 standard photovoltaic cell, C22 standard photovoltaic cell, C33 standard photovoltaic cell, C44 standard photovoltaic cell;
In Fig. 2 the present invention, four standard photovoltaic battery locations are put and mobile sequential schematic;
Fig. 3 adopts the present invention to test the unevenness planimetric map of certain type pulse solar simulator;
Fig. 4 adopts the present invention to test the instability data and curves figure of certain type pulse solar simulator.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
As shown in Figure 1, solar simulator irradiation nonuniformity of the present invention and instability test macro comprise: No. 1 standard photovoltaic cell C1, No. 2 standard photovoltaic cell C2, No. 3 standard photovoltaic cell C3, No. 4 standard photovoltaic cell C4.Four standard photovoltaic cell C1, C2, C3, C4 are as optical sensor of the present invention.Described standard photovoltaic battery size is 2cm * 2cm, and material is polysilicon or monocrystalline silicon.This battery, according to the regulation of international standard IEC60904-2:2007, is made with the aluminum alloy casing encapsulation, has stable calibration value after rating test.
Described No. 1 standard photovoltaic cell C1 is fixed on the edge of tested solar simulator effective irradiation face, usings this No. 1 standard photovoltaic cell C1 as benchmark, for the comparison of irradiance and the correction of instability.
In the adjacent decile cell in three left and right that described No. 2 standard photovoltaic cell C2, No. 3 standard photovoltaic cell C3 and No. 4 standard photovoltaic cell C4 are arranged in solar simulator irradiation face, manually mobile described three standard photovoltaic cells are measured the irradiance value of solar simulator in turn.Moving method is: three standard photovoltaic cells to be moved: described No. 2 standard photovoltaic cell C2, No. 3 standard photovoltaic cell C3 and No. 4 standard photovoltaic cell C4 do as a whole, from the upper left corner of solar simulator effective irradiation face, from left to right in the first row cell, take three lattice as a unit, manual ordinal shift overlappingly not, after having covered the first row cell, then with same order, in the second row cell, manually move, the like, all row of covering solar simulator effective irradiation face.If decile cell from left to right is not three integral multiple, can when moving to the rightmost side, reduce by one or two standard photovoltaic cells, guarantee just in time to cover all cells in solar simulator effective irradiation face, avoid and survey.
The present invention also comprises a data collecting unit.Described data acquisition unit comprises a four-way independence AD data collecting card and four high-accuracy measuring resistance R1, R2, R3 and R4 that resistance is 0.1 ohm; Described four standard photovoltaic cell C1, C2, C3, C4 form four closed loops, described four closed loops generation current under illumination condition by the respective channel of described data acquisition unit with corresponding measuring resistance R1, R2, R3 or R4 respectively; Data collecting card in described data acquisition unit has four input channels, each input channel comprises positive and negative two interfaces, the positive and negative interface of each passage connects respectively the two ends of corresponding measuring resistance R1, R2, R3 or R4, is used at the voltage signal that gathers high-accuracy measuring resistance R1, R2, R3 and the R4 two ends of described four 0.1 ohm.Four road voltage signals, after described data collecting card AD converts digital signal to, send computing machine by described data acquisition unit output channel to through the usb data line.
The present invention also comprises a computing machine, and this computing machine is connected by the usb data line with data acquisition unit, and native system is provided data to show and processes.Described computing machine demonstrates data and curves by the signal collected, and processes and draws irradiation nonuniformity value and the instability value of solar simulator through data, and judge the performance rate of this index according to international standard IEC60904-9:2007.
The job step of native system test solar simulator is carried out according to the described step of international standard IEC60904-9:2007.The present invention adopts the standard photovoltaic cell as the irradiance optical sensor, according to the effective irradiation face size of solar simulator, effective good fortune is shown up and is divided into several test grids.Be fixed on effective irradiation face edge using a standard photovoltaic cell as the reference battery, other three standard photovoltaic cells are by the irradiance value at manual traverse measurement diverse location place.Each piece standard photovoltaic cell, by the irradiance value of data acquisition unit four road synchronous acquisition solar simulators, converts digital signal to through AD, is sent to computing machine.Processed by computing machine, through comparing with reference battery, carry out the irradiance corrected Calculation, extrapolate the irradiation nonuniformity value of each test grid in solar simulator effective irradiation face.
1, irradiation nonuniformity test
Embodiment: a certain pulse solar simulator effective irradiation face is 200cm * 100cm.This area is obtained to 312.5cm after 64
2.Because this value is less than 400cm
2, so the full-size of standard photovoltaic cell can not surpass 312.5cm
2, at least to divide 64 grids in the effective irradiation face.If be divided into eight row nine row totally 72 grids tested, adopt four standard photovoltaic cells to be measured as optical sensor.Wherein a conduct, with reference to battery, is positioned over the edge of effective irradiation face.Another three as mobile battery, be arranged in successively in the adjacent decile cell in interior three left and right of solar simulator effective irradiation face, do three standard photovoltaic cells to be moved as a whole, from the upper left corner of effective irradiation face, take three lattice from left to right as a unit manual ordinal shift three times overlappingly not in the first row cell, after having covered the first row cell, then moving mobile the second row cell expert with same order, the like, manually move 24 times in turn altogether, guarantee just in time to cover 72 cells in all solar simulator effective irradiation faces, as shown in Figure 2.The test signal of four standard photovoltaic cells of data acquisition unit synchronous acquisition, send into computing machine and process.The numerical value of the solar simulator irradiance gathered, process is revised with the numerical value that reference battery collects, and obtains revised irradiance value, as the effective irradiance value of each test grid.
The unevenness matrix data of this pulse solar simulator is in Table 1, and Fig. 3 is shown in by the unevenness planimetric map.
Table 1 unevenness matrix
| 997.16 | 999.35 | 1015.84 | 1017.70 | 997.46 | 1007.32 | 1022.28 | 1029.79 | 1033.34 |
| 997.61 | 1001.21 | 1009.65 | 997.57 | 999.12 | 1009.78 | 1022.47 | 1029.55 | 1028.25 |
| 998.02 | 1003.58 | 999.74 | 1002.53 | 1001.12 | 1014.52 | 1028.04 | 1030.74 | 1027.98 |
| 997.18 | 1012.95 | 1002.75 | 998.25 | 1006.29 | 1014.97 | 1027.52 | 1026.35 | 1029.61 |
| 1006.26 | 999.91 | 1001.84 | 1004.94 | 1003.40 | 1019.13 | 1024.96 | 1028.35 | 1035.97 |
| 1003.73 | 1001.20 | 1004.91 | 1006.00 | 1009.46 | 1012.47 | 1024.50 | 1033.48 | 1035.45 |
| 997.66 | 1003.01 | 1007.24 | 1000.97 | 1011.50 | 1015.83 | 1025.33 | 1036.17 | 1030.86 |
| 998.19 | 1003.72 | 1008.81 | 999.88 | 1004.62 | 1017.16 | 1020.13 | 1029.58 | 1020.13 |
Irradiation nonuniformity adopts formula (1) to calculate:
Maximum irradiance and minimum irradiance refer at the Validity Test plane internal standard photovoltaic cell measured value that means fixed point in office.
2, irradiation instability test
Embodiment: a certain impulse type solar simulator that is 200cm * 100cm for the effective irradiation face, instability changes relevant with the irradiance in data acquisition time.To in a upper unevenness test implementation example, being positioned at solar simulator effective irradiation face center position, the data analysis that the standard photovoltaic cell be listed as fourth line the 5th gathers calculates, and wherein the instability data and curves as shown in Figure 4.
Press formula (2) and calculate instability.
The maximum irradiance here and minimum irradiance are determined by the purposes of solar simulator.If measuring, permanance irradiation use solar simulator, maximum irradiance and minimum irradiance to refer to the irradiance value in the arbitrfary point position measurement in the test plane of irradiation time section internal detector.
Claims (3)
1. a solar simulator irradiation nonuniformity and instability test macro, is characterized in that, described test macro comprises:
Four standard photovoltaic cells (C1, C2, C3, C4) through demarcating, as the optical sensor of described test macro;
A data collecting unit, four input channels of this data acquisition unit are connected with four standard photovoltaic cells (C1, C2, C3, C4), and the signal that described test macro is gathered carries out the AD conversion;
A computing machine, this computing machine is connected by the usb data line with data acquisition unit, to described test macro, provides data process and show.
2. solar simulator irradiation nonuniformity according to claim 1 and instability test macro, it is characterized in that, comprise a four-way independence AD data collecting card and four measuring resistances (R1, R2, R3, R4) that resistance is 0.1 ohm in described data acquisition unit; The positive and negative interface of each passage of described data collecting card connects respectively the two ends of corresponding measuring resistance.
3. solar simulator irradiation nonuniformity according to claim 1 and instability test macro, it is characterized in that, in described four standard photovoltaic cells, a standard photovoltaic cell (C1) is fixed on the edge of tested solar simulator effective irradiation face, in the adjacent decile cell in three left and right that its excess-three piece standard photovoltaic cell (C2, C3, C4) is arranged in solar simulator effective irradiation face successively; With three standard photovoltaic cells (C2, C3, C4), do as a whole, from the upper left corner of solar simulator effective irradiation face, from left to right in the first row cell, take three cells as a unit manual ordinal shift overlappingly not, after having covered the first row cell, then with same order, at the second row cell, manually move, the like, all row of covering solar simulator effective irradiation face.
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| CN105092213A (en) * | 2015-07-22 | 2015-11-25 | 上海卫星装备研究所 | Device and method for testing irradiation non-uniformity and instability of solar simulator |
| CN105281666A (en) * | 2015-10-22 | 2016-01-27 | 河海大学常州校区 | Method for improving test precision of solar cell radiation sensor |
| CN107152999A (en) * | 2017-05-26 | 2017-09-12 | 广东省计量科学研究院（华南国家计量测试中心） | Solar simulator irradiation level unevenness calibration method |
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