CN204065389U - Solar simulator electronic load box on-line calibration device - Google Patents
Solar simulator electronic load box on-line calibration device Download PDFInfo
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- CN204065389U CN204065389U CN201420311080.8U CN201420311080U CN204065389U CN 204065389 U CN204065389 U CN 204065389U CN 201420311080 U CN201420311080 U CN 201420311080U CN 204065389 U CN204065389 U CN 204065389U
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Abstract
The utility model discloses solar simulator electronic load box on-line calibration device, for the accuracy of measurement of the electric current of on-line calibration solar simulator electronic load box, voltage, power, comprise photovoltaic module (1), Y-type three way type connector (2), rapid data collection device (3), Hall closed-loop current sensors (4) and computing machine (5).It is the signal that rapid data collection device (3) gathers that this on-line calibration device detects gained signal, a signal is gained voltage signal after Hall closed-loop current sensors I-V changes, another signal is the voltage signal that photovoltaic module (1) exports, these two signals export to computing machine (5) after rapid data collection device (3) carries out AD conversion, show data and curves by computing machine (5).Utilize the utility model, under solving transient condition, calibrate the technological difficulties of solar simulator electronic load box, and calibration current, voltage, power measurement accuracy simultaneously, realize the calibration of IV curve.
Description
Technical field
The utility model relates to solar simulator electronic load box collimation technique field, is specifically related to a kind of solar simulator electronic load box on-line calibration device, for the accuracy of measurement of the electric current of on-line calibration solar simulator electronic load box, voltage, power.
Background technology
Solar simulator is a kind of light source of simulating nature solar spectrum and irradiance, is usually made up of light source and power supply, optics and optical filter, control operation system, electronic load box etc.Compared with the true sun, solar simulator have stability by force, not by advantages such as Changes in weather affect.Electronic load box is widely used in the test of photovoltaic module and solar cell photoelectric properties (as short-circuit current, open-circuit voltage, peak power, conversion efficiency, fill factor, curve factor etc.) as the parts of solar simulation core the most, the quality of its performance determines the accuracy of photovoltaic module and the measurement of solar cell photoelectric properties, and the practical application of the economic interests directly had influence in assembly trade settlement process and final photovoltaic plant and assessment.Domestic and international market existing solar simulator electronic load box performance is very different, there is the erroneous judgement to photovoltaic module power measurement result to a great extent.In order to ensure its accuracy measured, must calibrate solar simulator electronic load box.
Now mostly need electronic load box to separate simulator to the calibration of solar simulator electronic load box, then send China Metrology Accreditation mechanism to calibrate, and the cycle is longer, reduce the utilization ratio of solar simulator to a great extent, have impact on the production capacity of photovoltaic enterprise.Further, off-line calibration adopts source of stable pressure and constant-current source to input as signal usually, tests the accuracy of measurement of electronic load tank current, voltage respectively, exists different, may introduce measuring error from the sampling mode mostly being transient acquisition in actual application.
Utility model content
(1) technical matters that will solve
In view of this, fundamental purpose of the present utility model is to provide a kind of solar simulator electronic load box on-line calibration device, to calibrate the technological difficulties of solar simulator electronic load box under solving transient condition, and calibration current, voltage, power measurement accuracy simultaneously, realize the calibration of IV curve.
(2) technical scheme
For achieving the above object, the utility model provides a kind of solar simulator electronic load box on-line calibration device, and this device comprises photovoltaic module 1, Y-type three way type connector 2, rapid data collection device 3, Hall closed-loop current sensors 4 and computing machine 5, wherein:
Photovoltaic module 1, is made up of in the form of an array multiple solar cell piece, front towards solar simulator light source, for this solar simulator electronic load box on-line calibration device provides voltage and current signal source;
Y-type three way type connector 2, adopt unshielded cable to form, one end is binary channels interface, and the other end is single channel interface, is mated respectively by photovoltaic module 1 dock with rapid data collection device 3 and solar simulator electronic load box 6 to be calibrated;
Rapid data collection device 3, comprise multiple data acquisition port, the corresponding passage of each data acquisition port, any two passages are wherein selected during detection, channel acquisition gained voltage signal after Hall closed-loop current sensors I-V changes, another channel acquisition photovoltaic module 1 output voltage signal, carries out AD conversion to these the two kinds of signals gathered, exports to computing machine 5;
Hall closed-loop current sensors 4, to be mated with rapid data collection device 3 by concentric cable and be connected, testing current is provided to this solar simulator electronic load box on-line calibration device, to the current signal from photovoltaic module 1 adopted carry out I-V conversion, the voltage signal obtained after conversion exports to some passages of rapid data collection device 3 by concentric cable;
Computing machine 5, adopts USB port to be connected to rapid data collection device 3 and Hall closed-loop current sensors 4, shows, for Hall closed-loop current sensors 4 provides working power to the signal being received from rapid data collection device 3 with data and curves.
In such scheme, in described Y-type three way type connector 2, binary channels interface comprises first passage interface a and second channel interface b, first passage interface a mates with solar simulator electronic load box 6 to be calibrated and docks, and second channel interface b to be mated with a certain passage of rapid data collection device 3 by concentric cable and is connected; Single channel interface is third channel interface c, mates dock with the pin interfaces of photovoltaic module 1.
In such scheme, described rapid data collection device 3 passes through and demarcates before collection signal.
In such scheme, the sensitivity KH of described Hall closed-loop current sensors 4 is through demarcating, and sensitivity KH equals output voltage and input current ratio.
In such scheme, described Hall closed-loop current sensors 4 adopts concentric cable to be connected with between rapid data collection device 3, and all there is a joint at the two ends of this concentric cable.
In such scheme, a USB port in described computing machine 5 is connected with Hall closed-loop current sensors 4 power port, for it provides working power.
In such scheme, a USB port in described computing machine 5 is connected with rapid data collection device 3, shows with data and curves the signal being received from rapid data collection device 3.
In such scheme, it is the signal that rapid data collection device 3 gathers that this solar simulator electronic load box on-line calibration device detects gained signal, a signal is gained voltage signal after Hall closed-loop current sensors I-V changes, another signal is the voltage signal that photovoltaic module 1 exports, these two signals export to computing machine 5 after rapid data collection device 3 carries out AD conversion, show data and curves by computing machine 5.
(3) beneficial effect
As can be seen from technique scheme, the utility model has following beneficial effect:
1, the solar simulator electronic load box on-line calibration device that provides of the utility model, adopt binary channels or multi-channel signal acquiring, calibrate while can realizing solar simulator electronic load tank current, voltage, power measurement accuracy, under solving transient condition, calibrate the technological difficulties of solar simulator electronic load box.
2, the solar simulator electronic load box on-line calibration device that provides of the utility model, the on-line calibration of solar simulator electronic load box accuracy of measurement can be realized, greatly reduce calibration cycle, do not affect the practical application of solar simulator, do not affect the practical application of photovoltaic enterprise.
3, the solar simulator electronic load box on-line calibration device that provides of the utility model, can realize the calibration that solar simulator electronic load box measures IV curve.
4, the solar simulator electronic load box on-line calibration device that provides of the utility model, calibrates based under transient mode, consistent with the practical application of solar simulator electronic load box.
5, the solar simulator electronic load box on-line calibration device that provides of the utility model, structure is simple, is easy to carry and installs, can meet Site Detection and the metering requirements of photovoltaic enterprise and testing agency very well.
6, the solar simulator electronic load box on-line calibration device that provides of the utility model, to transient state and stable state solar simulator, comprises component tester, solar cell piece separator etc., all applicable.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, result of the present utility model and feature are described in further detail, wherein:
Fig. 1 is the schematic diagram of the solar simulator electronic load box on-line calibration device according to the utility model embodiment.
Fig. 2 utilizes the electronic load box of solar simulator shown in Fig. 1 on-line calibration device to record electric current, voltage, power relation over time.
Fig. 3 utilizes the electronic load box of solar simulator shown in Fig. 1 on-line calibration device to record calibration IV curve.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with specific embodiment, and with reference to accompanying drawing, the utility model is further described.
Refer to shown in Fig. 1, Fig. 1 is the schematic diagram of the solar simulator electronic load box on-line calibration device according to the utility model embodiment, for the accuracy of measurement of the electric current of on-line calibration solar simulator electronic load box 6, voltage, power, this device comprises photovoltaic module 1, Y-type three way type connector 2, rapid data collection device 3, Hall closed-loop current sensors 4 and computing machine 5, wherein:
Photovoltaic module 1, is made up of in the form of an array multiple solar cell piece, front towards solar simulator light source, for this solar simulator electronic load box on-line calibration device provides voltage and current signal source; In actual applications, can choose according to the testing range of electronic load box 6 to be measured the magnitude of voltage or current value that this photovoltaic module provides.
Y-type three way type connector 2, adopt unshielded cable to form, one end is binary channels interface, and the other end is single channel interface, is mated respectively by photovoltaic module 1 dock with rapid data collection device 3 and solar simulator electronic load box 6 to be calibrated; Wherein, binary channels interface comprises first passage interface a and second channel interface b, first passage interface a mates with solar simulator electronic load box 6 to be calibrated and docks, and second channel interface b to be mated with a certain passage of rapid data collection device 3 by concentric cable and is connected; Single channel interface is third channel interface c, mates dock with the pin interfaces of photovoltaic module 1.In actual applications, in this solar simulator electronic load box on-line calibration device, the number of Y-type three way type connector can be one, also can be multiple, and the number of the connector of Y-type three way type shown in Fig. 1 is two.
Rapid data collection device 3, this data acquisition unit passes through and demarcates before collection signal, comprise multiple data acquisition port, the corresponding passage of each data acquisition port, any two passages are wherein selected during detection, channel acquisition gained voltage signal after Hall closed-loop current sensors I-V changes, another channel acquisition photovoltaic module 1 output voltage signal; This rapid data collection device 3 carries out AD conversion to the above-mentioned two kinds of signals gathered, and exports to computing machine 5, shows data and curves by computing machine 5.
Hall closed-loop current sensors 4, to be mated with rapid data collection device 3 by concentric cable and be connected, testing current is provided to this solar simulator electronic load box on-line calibration device, to the current signal from photovoltaic module 1 adopted carry out I-V conversion, the voltage signal obtained after conversion exports to a certain passage of rapid data collection device 3 by concentric cable.The sensitivity KH of this Hall closed-loop current sensors is through demarcating, and sensitivity KH equals output voltage and input current ratio.Described Hall closed-loop current sensors 4 adopts concentric cable to be connected with between rapid data collection device 3, and all there is a joint at the two ends of this concentric cable.
Computing machine 5, adopt USB port to be connected to rapid data collection device 3 and Hall closed-loop current sensors 4, one of them USB port is connected with Hall closed-loop current sensors 4 power port, for it provides working power; A USB port is connected with rapid data collection device 3, shows with data and curves the signal being received from rapid data collection device 3.
This solar simulator electronic load box on-line calibration device detects the signal of gained signal and rapid data collection device 3 collection, a signal is gained voltage signal after Hall closed-loop current sensors I-V changes, another signal is the voltage signal that photovoltaic module 1 exports, these two signals export to computing machine 5 after rapid data collection device 3 carries out AD conversion, show data and curves by computing machine 5.
In the set-up procedure detected, according to solar simulator electronic load box calibration range, select suitable photovoltaic module as the electric current of solar simulator electronic load box and measuring apparatus and voltage signal source, after its temperature stabilization, be placed in test surfaces, front is just to solar simulator light source.Record Hall closed-loop current sensors exports zero-point voltage value V0.By Y-type three way type connector wherein one through Hall closed-loop current sensors perforation punching circular hole, for the measurement of this solar simulator electronic load box on-line calibration device current signal.
Irradiation is carried out to photovoltaic module 1, solar simulator electronic load box is utilized to measure its IV characteristic, comprise voltage, electric current curve over time, utilize rapid data collection device 3 sampled signal to export simultaneously, record photovoltaic module 1 output voltage V and Hall current sensor secondary output voltage V1 curve over time.Formula electric current I=(V1-V0)/KH and power P=VI is embedded in rapid data collection device 3 software handler, carries out computing and export accordingly result.Obtain photovoltaic module 1 output current (Hall current sensor former limit input current) I, output voltage V, output power P with the change curve in sampling time.Sample same time point place solar simulator electronic load box measurement electric current, voltage, power and this solar simulator electronic load box on-line calibration device electric current, voltage, power measurement values to compare, obtain the calibration result under this range.By sampling different time points (corresponding different electric current, voltage, power range), realize the multirange calibration that solar simulator electronic load box measures electric current, voltage, power accuracy.
Consider the situation of practical application, the magnitude of voltage (Vm) of open-circuit voltage (Voc) (magnitude of voltage when output current is 0), short-circuit current (Isc) (current value when output voltage is 0), peak power output (Pm) and correspondence thereof, current value (Im) evaluate the most key photoelectric parameter of photovoltaic module performance, therefore the calibration of general solar simulator electronic load box accuracy of measurement is only for above 5 parameters.Preferably, repeat 5 tests, average as final calibration result.
Test case
Be that the solar simulator electronic load box on-line calibration device that provides of the utility model is provided as follows, certain photovoltaic enterprise production test transient state solar simulator electronic load box voltage used, electric current, power measurement accuracy are calibrated.
Hall current sensor sensitivity KH=0.200175V/A is obtained by demarcating.Hall closed-loop current sensors zero-point voltage V0=2.507V is measured with rapid data collection device.Choose nominal power Pm=230W, the monocrystalline silicon photovoltaic module of short-circuit current Isc=8.4A, open-circuit voltage Voc=37.0V as voltage, current signal source, after itself and surrounding environment heat exchange temperature are stable, be placed in test surfaces, front is in the face of simulator light source.Connect each service wire according to accompanying drawing 1, trigger solar simulator pulse flash, utilize solar simulator electronic load box and this solar simulator electronic load box on-line calibration device to gather photovoltaic module simultaneously and export IV characteristic.Record solar simulator electronic load box records magnitude of voltage Vmm, the current value Imm of open-circuit voltage Vocm, short-circuit current Iscm, peak power output Pmm and correspondence thereof.Utilize rapid data collection device 3 sampled signal to export, record photovoltaic module output voltage Vc and Hall current sensor secondary output voltage V1 curve over time.Formula electric current I c=(V1-V0)/KH and power P c=VcIc is embedded in rapid data collection device 3 software handler, carry out computing and export accordingly result, obtain photovoltaic module output current Ic, output voltage Vc, output power Pc with the change curve in sampling time, as shown in Figure 2.Take Vc as horizontal ordinate, Ic, Pc that each same time point is corresponding are ordinate mapping, obtain calibrated IV family curve, as shown in Figure 3.When getting Vc=0, corresponding Ic is short-circuit current calibration value Iscc, and when getting Ic=0, corresponding Vc is open-circuit voltage calibration value Vocc, and the maximal value of getting Pc is peak power calibration value Pmc, and corresponding voltage, electric current are respectively Vmc, Imc.
Repeat above test process 5 times, calculate Vocm respectively, Iscm, Pmm, Imm, Vmm, Vocc, Iscc, Pmc, Imc, the mean value of Vmc, and then obtain open-circuit voltage modifying factor (Vocc/Vocm), short-circuit current modifying factor (Iscc/Iscm), peak power modifying factor (Pmc/Pmm), peak power corresponding current modifying factor (Imc/Imm), the calibration result of peak power corresponding voltage modifying factor (Vmc/Vmm), as shown in table 1, table 1 is the calibration result utilizing the electronic load box of solar simulator shown in Fig. 1 on-line calibration device to calibrate solar simulator electronic load box accuracy of measurement.
Table 1
Above-described specific embodiment; the purpose of this utility model, technical scheme and beneficial effect are further described; be understood that; the foregoing is only specific embodiment of the utility model; be not limited to the utility model; all within spirit of the present utility model and principle, any amendment made, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (8)
1. a solar simulator electronic load box on-line calibration device, it is characterized in that, this device comprises photovoltaic module (1), Y-type three way type connector (2), rapid data collection device (3), Hall closed-loop current sensors (4) and computing machine (5), wherein:
Photovoltaic module (1), is made up of in the form of an array multiple solar cell piece, front towards solar simulator light source, for this solar simulator electronic load box on-line calibration device provides voltage and current signal source;
Y-type three way type connector (2), employing unshielded cable is formed, one end is binary channels interface, the other end is single channel interface, is mated respectively by photovoltaic module (1) dock with rapid data collection device (3) and solar simulator electronic load box (6) to be calibrated;
Rapid data collection device (3), comprise multiple data acquisition port, the corresponding passage of each data acquisition port, any two passages are wherein selected during detection, channel acquisition gained voltage signal after Hall closed-loop current sensors I-V changes, another channel acquisition photovoltaic module (1) output voltage signal, carries out AD conversion to these the two kinds of signals gathered, exports to computing machine (5);
Hall closed-loop current sensors (4), to be mated with rapid data collection device (3) by concentric cable and be connected, testing current is provided to this solar simulator electronic load box on-line calibration device, to the current signal from photovoltaic module (1) adopted carry out I-V conversion, the voltage signal obtained after conversion exports to some passages of rapid data collection device (3) by concentric cable;
Computing machine (5), USB port is adopted to be connected to rapid data collection device (3) and Hall closed-loop current sensors (4), the signal being received from rapid data collection device (3) is shown with data and curves, for Hall closed-loop current sensors (4) provides working power.
2. solar simulator electronic load box on-line calibration device according to claim 1, it is characterized in that, in described Y-type three way type connector (2), binary channels interface comprises first passage interface a and second channel interface b, first passage interface a mates with solar simulator electronic load box (6) to be calibrated and docks, and second channel interface b to be mated with a certain passage of rapid data collection device (3) by concentric cable and is connected; Single channel interface is third channel interface c, mates dock with the pin interfaces of photovoltaic module (1).
3. solar simulator electronic load box on-line calibration device according to claim 1, is characterized in that, described rapid data collection device (3) is passed through and demarcated before collection signal.
4. solar simulator electronic load box on-line calibration device according to claim 1, is characterized in that, the sensitivity KH of described Hall closed-loop current sensors (4) is through demarcating, and sensitivity KH equals output voltage and input current ratio.
5. solar simulator electronic load box on-line calibration device according to claim 1, it is characterized in that, described Hall closed-loop current sensors (4) adopts concentric cable to be connected with between rapid data collection device (3), and all there is a joint at the two ends of this concentric cable.
6. solar simulator electronic load box on-line calibration device according to claim 1, it is characterized in that, a USB port in described computing machine (5) is connected with Hall closed-loop current sensors (4) power port, for it provides working power.
7. solar simulator electronic load box on-line calibration device according to claim 1, it is characterized in that, a USB port in described computing machine (5) is connected with rapid data collection device (3), shows with data and curves the signal being received from rapid data collection device (3).
8. solar simulator electronic load box on-line calibration device according to claim 1, it is characterized in that, it is the signal that rapid data collection device (3) gathers that this solar simulator electronic load box on-line calibration device detects gained signal, a signal is gained voltage signal after Hall closed-loop current sensors I-V changes, another signal is the voltage signal that photovoltaic module (1) exports, these two signals export to computing machine (5) after rapid data collection device (3) carries out AD conversion, show data and curves by computing machine (5).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104953948A (en) * | 2015-06-29 | 2015-09-30 | 中国电力科学研究院 | Error correction method for dynamic MPPT (maximum power point tracking) efficiency test on photovoltaic inverter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104953948A (en) * | 2015-06-29 | 2015-09-30 | 中国电力科学研究院 | Error correction method for dynamic MPPT (maximum power point tracking) efficiency test on photovoltaic inverter |
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