High-speed multi-channel system for solar simulator irradiance non-uniformity measurement

Rivola, Davide; Dittmann, Sebastian; Pravettoni, Mauro; Friesen, Gabi; Chianese, D.

doi:10.1109/pvsc.2014.6925465

Cited by 5 publications

(8 citation statements)

References 4 publications

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“…This was reasonable because the size of the test area was larger using the same light source. The light intensity around the test area would decrease the non-uniformity of solar simulator as [1], [2], [10], [14], and [28]. However, the experimental results were shown that the array detector scanning system measurements were more reliable because each measurement result in the same test-area were %uncertainty in average of 1.41% lower than that of the single detector (5.79%) significantly.…”

Section: The Analysis Of the Non-uniformity Of Irradiancementioning

confidence: 95%

Experiment analysis of non-uniformity measurement by array detector scanning system

Watjanatepin

Sritanauthaikorn

Boonmee

et al. 2022

IJEECS

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Solar simulator is used to analysis characteristic of the solar cells. The non-uniformity is its major performance. The traditional non-uniformity measurement calls single detector method. The paper’s objective is to design and construct an array detector scanning system and to determine the optimal scanning time to achieve the lowest uncertainty. To investigate the non-uniformity by our proposed method and the traditional method, our detector consisted of eight photodiodes mounted on an arm of a linear motion lead screw to guide the detector scaning onto the lighting area. A microcontroller applied for controling and measuring light irradiance in 64 points corresponding to IEC 60904-9 standard. The results showed that the array detector scanned at a speed of 33.33 mm/s to obtain the non-uniformity with the lowest uncertainty, less than 0.6%. Analysis results of the non-uniformity obtained from our system on the test areas of (mm×mm) 156×156, 166×166 and 200×200 compared with the single detector. It showed that the mean absolute error was 1.27. Our system provided a lower uncertainty than the traditional method. The measurement accuracy was acceptable. The advantage is for testing on different test areas within a single device. The measurement time is around 1/32 of the traditional method.

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Section: The Analysis Of the Non-uniformity Of Irradiancementioning

confidence: 95%

Experiment analysis of non-uniformity measurement by array detector scanning system

Watjanatepin

Sritanauthaikorn

Boonmee

et al. 2022

IJEECS

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“…Data analysis was done by Specwin Pro software with a spectral mismatch as referred to the IEC 60904-9 standard [4]. The authors had developed a custom measurement device of non-uniformity for the proposed solar simulator following the studies of [19] and [20]. Ten of the monocrystalline silicon solar cells (dimension of 30 mm × 25 mm) were applied to detect the irradiance of the solar simulator (Figure 2(b)).…”

Section: E Led Power Sourcesmentioning

confidence: 99%

“…Several reasons can cause the irradiance measurement error. The solar cell output coefficient is related to the conversion efficiency, area, and incident angle of ten cells used as the irradiance sensor [20]. Other errors are the shunt resistance error in the circuit of Figure 2(a) and the offset from the op-amp of I/V converter modules.…”

Section: B Led Solar Simulator Prototype Non-uniformity Of Irradiancementioning

confidence: 99%

A Novel Solar Simulator Based on Combined Natural-White and Infrared Light Emitting Diodes

Watjanatepin¹,

Kiatsookkanatorn²

2021

Journal of Southwest Jiaotong University

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Despite the continuous trend of an LED solar simulator development, there was little to be found in the application of a phosphor-converted natural white LED (pc-nWLED) for construction. This article reported the design and construction of an LED solar simulator which combined a pc-nWLED with infrared LEDs. The objectives of this study are to determine the performance of a novel solar simulator including non-uniformity (SNE), temporal stability (TIE), and spectrum mismatch (SM). This is followed by an experimental study of the correlation between the LED’s temperature and SNE. A spectroradiometer, pyranometer, and a custom-made non-uniformity measurement system were applied to test the performance characteristics of this solar simulator. The results indicated that the proposed solar simulator could achieve the AAA class. The results showed 0.90-1.08 of SM, 0.83% TIE, and 1.34% of SNE. The SNE indicated the positive significant correlation with the LED’s temperature, with an approximate of +0.043% per °C. A good cooling system for the LED module was necessary to maintain constant light uniformity. The blue-chip phosphor converted white LED combination with color mixed of 730 nm, 850 nm, and 940 nm could emit a light spectrum that was very close to the reference spectrum of about 99.6%.

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“…Solar simulators are often used for the indoor characterisation of photovoltaic cells [1][2][3]. This is due to the varying outdoor conditions [4].…”

Section: Introductionmentioning

confidence: 99%

Autonomous Dynamic Adaptability System to Maintain Irradiance Levels in a Steady-State Solar Simulator

Meyer

Nwodo

2020

Applied Sciences

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This paper presents the design of an autonomous dynamic adaptability system (ADAS) for maintaining the irradiance levels of a steady-state xenon arc lamp solar simulator (SS). The solar simulator is used to carry out indoor testing and accelerated age tests on photovoltaic (PV) cells at the Fort Hare Institute of Technology (FHIT). The ADAS was designed primarily for two reasons: Firstly, to maintain a set irradiance level, irrespective of external effects which may cause unintended irradiance drift or fluctuations, while carrying out indoor tests. Secondly, to achieve the solar simulator set point quicker, thus reducing temperature build up on the target area. At a cold start, the SS runs at 20% of its rated current (145 A). At 20% of 145 A, the simulator gave an irradiance of 145.97 Wm−2 with a non-uniformity of 1.02%, and a cell surface temperature of 24.9 °C. At 50%, the simulator produced irradiance of 501.30 Wm−2, with a non-uniformity of 1.53% and a cell surface temperature of 25.0 °C. The irradiance of 1000 Wm−2, with a non-uniformity of 3.26% and a cell surface temperature of 25.9 °C, was achieved at 90% of the rated current. From the results obtained, the ADAS demonstrates that it can reliably operate the SS with very minimal human–machine interaction. Through the autonomous dynamic adaptability, set irradiance levels are maintained in a steady-state solar simulator once the user supplies operational set points via the supervisory control and data acquisition (SCADA) interface.

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High-speed multi-channel system for solar simulator irradiance non-uniformity measurement

Cited by 5 publications

References 4 publications

Experiment analysis of non-uniformity measurement by array detector scanning system

Experiment analysis of non-uniformity measurement by array detector scanning system

A Novel Solar Simulator Based on Combined Natural-White and Infrared Light Emitting Diodes

Autonomous Dynamic Adaptability System to Maintain Irradiance Levels in a Steady-State Solar Simulator

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