In-situ module-level I–V tracers for novel PV monitoring

Quiroz, Jimmy Edward; Stein, Joshua S.; Carmignani, Craig; Gillispie, Kellen

doi:10.1109/pvsc.2015.7355608

Cited by 22 publications

(13 citation statements)

References 2 publications

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“…Figure 14 shows I-V and P-V curves of the panel that has a hot spot and a panel without faults as a comparison. It is observed that the voltage of the panel with failure falls at around 16Vdc, showing a typical behavior of a damaged or "shaded" cell [14][15][16][17] which matches the thermography image. Reviewing the P-V curve of the panels, the decrease in the maximum power point (MPP) is observed, power decreases from 94.16W on the panel without anomalies (see Figure 14a), to 69.97W on the panel with anomalies (with a hotspot, see Figure 14b) obtaining a 25.69% less power in the panel with the hot spot compared to a panel without failures.…”

Section: I-v/p-v Curves Analysis As First Validationmentioning

confidence: 70%

Low-cost infrared thermography in aid of photovoltaic panels degradation research

Dávila-Sacoto

Hernández-Callejo

Alonso‐Gómez

et al. 2020

redin

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The analysis of PV solar panels deterioration allows researchers to know the health status of a panel in order to determine the overall functioning of a PV solar farm. A part of this analysis is performed by thermography, generally using professional and expensive equipment. This article presents a validation for the use of low-cost thermal imaging cameras, reviewing the relative error that can be obtained through scattering, contour analysis and three-dimensional meshes. The procedure is validated by analysis of I-V/P-V curves and a temperature sensor matrix, reaching errors less than 10% with cameras with less than 500USD.

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Section: I-v/p-v Curves Analysis As First Validationmentioning

confidence: 70%

Low-cost infrared thermography in aid of photovoltaic panels degradation research

Dávila-Sacoto

Hernández-Callejo

Alonso‐Gómez

et al. 2020

redin

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“…Based on onsite IVCT data, several researchers have investigated diagnostic strategies [32]- [34]. IVCT is a fast and accurate way to check performance and troubleshoot issues before becoming significant [35]. Many simple characteristic parameters can be derived directly from I − V curves, such as opencircuit voltage (V oc ), short circuit current (I sc ), maximum current (I m ), and maximum voltage (V m ), as well as Fill Factor (FF) [36].…”

Section: Introductionmentioning

confidence: 99%

Design and Development of Low Cost, Portable, On-Field I-V Curve Tracer Based on Capacitor Loading for High Power Rated Solar Photovoltaic Modules

Sayyad

Nasikkar

2021

IEEE Access

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This paper outlines a novel design of low-cost, portable, fast, and precise Current-Voltage Curve Tracer (IVCT) with automated parameter extraction for high power rated Solar Photovoltaic (SPV) modules to effectively and efficiently determine the outdoor operating status of SPV power generators. The developed IVCT is based on a Raspberry Pi microprocessor, a super-capacitive load, heat sinkable discharge resistances, and sensors with high sensitivity and resolution for measuring light irradiance, module temperature, current, and voltage. The proposed Outdoor Test Facility (OTF) consists of an Current-Voltage (I − V ) and a Power-Voltage (P − V ) curve tracer that uses a dynamic loading supercapacitor to safely and quickly scan the SPV module performance characteristics under real-world operating conditions. It also helps to achieve uniform sampling with better data accuracy. It uses Raspberry Pi as a central processing unit for low-cost data acquisition, data logging, and data computation. Furthermore, results from on-field testing of various small-scale SPV modules show that the I − V tracer can acquire higher-resolution characteristics curves and perform accurate model parameter recognition in real-time. Proposed IVCT can measure individual SPV modules without altering the electrical interconnection circuit, and the operating point can be shifted to 20 A and 45 V in few seconds. The proposed system recomposes the SPV module I − V characteristics based on this variance, with accuracies of 1 to 3% for the region near maximum power. INDEX TERMSI-V curve tracer, Capacitive load, Internet of Things (IoT), On-site I − V curve measurement, Solar Photovoltaic VOLUME x, 20xx

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“…The device may be even more expensive if additional requirements are needed, such as working outdoors, using a wi-fi connection, or allowing specific electrical voltages and intensities. Some devices have been developed in an attempt to satisfy these demands at low cost [31]. The second option is probably the easiest to implement, due to the simplicity of the experimental configuration.…”

Section: Introductionmentioning

confidence: 99%

Design of a Low-Cost Multiplexer for the Study of the Impact of Soiling on PV Panel Performance

et al. 2021

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Atmospheric factors, such as clouds, wind, dust, or aerosols, play an important role in the power generation of photovoltaic (PV) plants. Among these factors, soiling has been revealed as one of the most relevant causes diminishing the PV yield, mainly in arid zones or deserts. The effect of soiling on the PV performance can be analyzed by means of I–V curves measured simultaneously on two PV panels: one soiled and the other clean. To this end, two I–V tracers, or one I–V tracer along with a multiplexer, are needed. Unfortunately, these options are usually expensive, and only one I–V tracer is typically available at the site of interest. In this work, the design of a low-cost multiplexer is described. The multiplexer is controlled by a low-cost single-board microcontroller manufactured by ArduinoTM, and is capable of managing several pairs of PV panels almost simultaneously. The multiplexer can be installed outdoors, in contrast to many commercial I–V tracers or multiplexers. This advantage allows the soiling effect to be monitored on two PV panels, by means of I–V indoor tracers. I–V curves measured by the low-cost multiplexer are also presented, and preliminary results are analyzed.

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In-situ module-level I–V tracers for novel PV monitoring

Cited by 22 publications

References 2 publications

Low-cost infrared thermography in aid of photovoltaic panels degradation research

Low-cost infrared thermography in aid of photovoltaic panels degradation research

Design and Development of Low Cost, Portable, On-Field I-V Curve Tracer Based on Capacitor Loading for High Power Rated Solar Photovoltaic Modules

Design of a Low-Cost Multiplexer for the Study of the Impact of Soiling on PV Panel Performance

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