Correlating Infrared Thermography With Electrical Degradation of PV Modules Inspected in All-India Survey of Photovoltaic Module Reliability 2016

Chattopadhyay, Shashwata; Dubey, Rahul; Bhaduri, Sumit; Zachariah, Sachin; Singh, Hemant Kumar; Solanki, Chetan Singh; Kottantharayil, Anil; Shiradkar, Narendra; Arora, B. M.; Narasimhan, K. L.; Vasi, J.

doi:10.1109/jphotov.2018.2859780

Cited by 32 publications

(10 citation statements)

References 5 publications

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“…tree coverage) [2], and dust particles [3]. Practically speaking, these issues are a considered as the major significant factors in decreasing the performance of the output power generation of PV modules, as well as creating an uneven increase in the cells temperature, causing a phenomenon named "PV hot-spots" [4]- [5].…”

Section: Overview Of Pv Mismatch Conditionsmentioning

confidence: 99%

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Current limiter circuit to avoid photovoltaic mismatch conditions including hot-spots and shading

Dhimish

Badran

2020

Renewable Energy

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Photovoltaic (PV) hot-spots are considered as one of the main reliability issues for PV modules.Although PV modules are capable to tolerate over-temperature, the hot-spots can lead to accelerated aging and, sometimes, to sudden failure with possible risk to fire. The commonpractise for mitigating this phenomenon is the adoption of the conventional bypass diode circuit, yet, this method does not guarantee a decrease in the temperature of hot-spotted solar cell. Therefore, in this paper, we present the development of a new current limiter circuit that is capable of mitigating the current flow of PV modules affected by mismatch conditions including partial shading and hot-spotting phenomenon. The foundation of the proposed circuit is fundamentally based on an input buffer which allows high impedance input voltages, and an operational amplifier circuit which controls the current flow of an integrated MOSFETs.Hence, to allow the control of the amount of current passing though mismatched PV substrings, and therefore, increase the output power generation. Detailed circuit simulations and multiple experiments are presented to evidence the capability of the circuit. In contrast, the average dissipated power of the circuit is limited to 0.53 W.

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Section: Overview Of Pv Mismatch Conditionsmentioning

confidence: 99%

“…According to Fig. 3, the two non-inverting amplifiers (LT2 and LT3) are acting as a buffer amplifiers with a gain expressed by (5). The main advantage of this modification that the gain of the existing circuit could be adjusted only by changing the input gain resistance (RGain).…”

Section: Fig 1 Widely Used Current Limiter Circuitmentioning

confidence: 99%

Current limiter circuit to avoid photovoltaic mismatch conditions including hot-spots and shading

Dhimish

Badran

2020

Renewable Energy

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“…Most of these disturbances result in thermal fault in the PV module, such as hotspots and electrical arc [7]. Hotspot disturbances in PV have a harmful impact, especially the degradation of the module material [8] [9]. It can cause accelerated aging and reduce PV energy production to about 70% within 15 years of operation [10].…”

Section: Introductionmentioning

confidence: 99%

Photovoltaic (PV) Thermal Fault Monitoring Using the Catadioptric Device

Pramana

Dalimi

2023

IEEE Access

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Large photovoltaic (PV) generations are vulnerable to thermal faults where the location is difficult to determine. The pre-existing thermal fault detection method (mostly manual visual inspection) is time-consuming and non-continuously monitoring. It may lead to more defects, such as degrading the faulted PV cell or putting the PV farm on fire. We propose a novel PV thermal fault monitoring and detection method using a catadioptric device (CD), which promises quick and continuous detection. In this paper, as an early stage in CD development, we focus on constructing a model involving some parameters to identify the object image formation. Then, through the model, a simulation case study of the PV farm monitoring proses was performed where the CD is ostensibly placed in front of the PV arrays. We variated the model parameters and selected the combination that resulted in a symmetrical and non-overlapped PV array image, which was then analyzed to see the sensor requirements of the CD. The results showed that the developed model could simulate PV image formation on CD with good validity. Also, the case result found that nine parameter combinations produce symmetrical and non-overlapped PV images where the image ratio is more affected by the camera position than the focal length. Finally, the minimum sensor requirement is determined by the center length of the farthest PV image to monitor all of the PV arrays.

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“…Conventional methods of I‐V curve analysis provide information pertaining to reduction in module's overall performance 35,36 . However, it fails to highlight the non‐uniform distribution of D&Ds in PV modules.…”

Section: Introductionmentioning

confidence: 99%

Investigation of dominant degradation mode in field‐aged photovoltaic modules using novel differential current‐voltage analysis approach

Meena

Kumar

Gupta

2022

Progress in Photovoltaics

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Photovoltaic (PV) modules are susceptible to various types of defects and degradations (D&Ds) under field‐operating conditions, which affect their performance and reliability. These D&Ds have non‐uniform distribution in the PV modules, which makes it difficult to distinguish amongst multiple D&Ds using a single characterization technique. In the present work, a simple non‐destructive characterization approach called differential current‐voltage (DIV) analysis using current‐voltage (I‐V) measurements have been developed for investigation of the dominant degradation mode in the cells of modules, wherein consecutive cells have been partially shaded while measuring the I‐V curve of the modules. For this purpose, a batch of crystalline silicon PV modules operating under hot and humid climatic conditions for 20 years has been investigated. A correlation has been established between the trend of percentage change in modules' electrical parameters during DIV measurements and the dominant degradation mode present in the cell under investigation. The trend of change in short circuit current and voltage at maximum power point has been identified as key electrical parameters to identify the dominant degradation mode in the cell. To analyse the trends of DIV analysis, the effect of prominent degradation modes on the module parameters has been investigated using electrical simulations. The investigated PV modules have been cross‐characterized through microscopic inspection and electroluminescence imaging to identify various D&Ds present in the investigated modules. The results of cross‐characterization substantiate the findings of DIV analysis. The presented DIV approach can be used for the analysis of non‐uniform degradation in the PV plants under field‐operating conditions.

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Correlating Infrared Thermography With Electrical Degradation of PV Modules Inspected in All-India Survey of Photovoltaic Module Reliability 2016

Cited by 32 publications

References 5 publications

Current limiter circuit to avoid photovoltaic mismatch conditions including hot-spots and shading

Current limiter circuit to avoid photovoltaic mismatch conditions including hot-spots and shading

Photovoltaic (PV) Thermal Fault Monitoring Using the Catadioptric Device

Investigation of dominant degradation mode in field‐aged photovoltaic modules using novel differential current‐voltage analysis approach

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