Research on hot spot risk for high-efficiency solar module

Deng, Shifeng; Zhang, Zhen; Ju, Chenhui; Dong, Jingbing; Xia, Zhengyue; Yan, Xinchun; Xu, Tao; Xing, Guoqiang

doi:10.1016/j.egypro.2017.09.399

Cited by 85 publications

(34 citation statements)

References 5 publications

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“…There are many publications related to simulation and modelling of hot spots using different software. For instance, Deng et al [100] designed a model to define heat dissipation under different shading conditions. Solheim et al [101] modelled the thermal properties of a solar cell considering its several layers to calculate more precisely the thermal distribution.…”

Section: Hot Spotsmentioning

confidence: 99%

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Survey of maintenance management for photovoltaic power systems

Gonzalo

Marugán

Márquez

2020

Renewable and Sustainable Energy Reviews

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The sustainability of the global energy production systems involves new renewable energies and the improvement of the existing ones. Photovoltaic industry is growing thanks to the development of new technologies that increase the performance of photovoltaic systems. These systems are commonly subject to harsh environmental conditions that decrease their energy production and efficiency. In addition, current photovoltaic technologies are more sophisticated, and the size of photovoltaics solar plants is growing. Under this framework, research on failures and degradation mechanisms, together with the improvement of maintenance management, becomes essential to increase the performance, efficiency, reliability, availability, safety, and profitability of these systems. To assess maintenance needs, this paper presents a double contribution: an exhaustive literature review and updated survey on maintenance of photovoltaic plants, and a novel analysis of the current state and a discussion of the future trends and challenges in this field. An analysis of the main faults and degradation mechanisms is done, including the causes, effects, and the main techniques to detect, prevent and mitigate them.

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Section: Hot Spotsmentioning

confidence: 99%

“…[99] Germany Process control, thermography. [100] China Simulation, impact of defects. [101] Norway FEM, different types.…”

Section: Snow and Ice Depositionmentioning

confidence: 99%

Survey of maintenance management for photovoltaic power systems

Gonzalo

Marugán

Márquez

2020

Renewable and Sustainable Energy Reviews

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“…The high-temperature part of the PV module appears as a hot spot, as demonstrated in Fig. 4 [94][95][96]. This can happen temporarily or permanently.…”

Section: Hot Spots (Temporary and Permanent)mentioning

confidence: 99%

Review of mismatch mitigation techniques for PV modules

Niazi

Yang

Séra

2019

IET Renewable Power Generation

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The installation of photovoltaic (PV) systems is continuously increasing in both standalone and grid-connected applications. The energy conversion from solar PV modules is not very efficient, but it is clean and green, which makes it valuable. The energy output from the PV modules is highly affected by the operating conditions. Varying operating conditions may lead to faults in PV modules, e.g. the mismatch faults, which may occur due to shadows over the modules. Consequently, the entire PV system performance in terms of energy production and lifetime is degraded. To address this issue, mismatch mitigation techniques have been developed in the literature. In this context, this study provides a review of the state-of-the-art mismatch mitigation techniques, and operational principles of both passive and active techniques are briefed for better understanding. A comparison is presented among all the techniques in terms of component count, complexity, efficiency, cost, control, functional reliability, and appearance of local maximums. Selected techniques are also benchmarked through simulations. This review serves as a guide to select suitable techniques according to the corresponding requirements and applications. More importantly, it is expected to spark new ideas to develop advanced mismatch mitigation techniques.

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“…Employing bypass diodes in parallel to the PV panels inherently reduces the shading impact but the major drawback is that, even if a fraction of the panel is shaded, the particular panel will be discarded from the cumulative PV array, which decreases the power efficiency [17][18][19]. Additionally, the employment of flyback diodes results in multiple power peaks in P-V curves.…”

Section: Introductionmentioning

confidence: 99%

Performance Enhancement of a Partially Shaded Photovoltaic Array by Optimal Reconfiguration and Current Injection Schemes

et al. 2021

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The output of a photovoltaic array is reduced considerably when PV panels are shaded even partially. The impact of shading causes an appreciable loss in power delivery, since the PV panels are connected in series and parallel to contribute to the required voltage and power for the load. The prevailing research on mitigating the shading impact is mostly based on complex reconfiguration strategies where the PV panels are subjected to complex rewiring schemes. On the other hand, to disperse the shading many studies in the literature defend the physical rearrangement of the panels. The available intensive reconfiguration schemes, such as the series parallel (SP), bridge link (BL), honeycomb (HC), and total cross tied (TCT) schemes, try only to mitigate the shading impact and there is no scope for compensation; as a result, a loss of output power is inevitable. In the proposed research work, both the mitigation of and the compensation for the losses incurred due to shading are studied. In this work, an optimal reconfiguration scheme is adopted to reduce the shading impact and a power electronic circuit with a battery source is designed to compensate for the shading losses in all aspects. In the optimal reconfiguration scheme, a bifurcation strategy is adopted in each column and the electrical connections of the PV panels are interchanged such that the shading impact is dispersed. The power electronic circuit consists of a half-bridge buck converter with a battery source that injects the current required by a shaded column. This setup compensates for the shaded PV array’s power and improves the efficiency of the total system. The proposed scheme was implemented in a 3200 W system and subjected to various shading patterns, including single panel shading, corner shading, long and wide shading, and random shading. The proposed scheme was simulated in the MATLAB Simulink environment and compared with static 4 × 4 PV array configurations, including the series parallel (SP), bridge link (BL), honeycomb (HC), and total cross tied (TCT) configurations. The comparative performance was assessed in terms of mismatch power loss, fill factor, and efficiency. The proposed system is suitable for all shading patterns and was proved to be very efficient even in the worst shading, where 1353 W was saved.

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Research on hot spot risk for high-efficiency solar module

Cited by 85 publications

References 5 publications

Survey of maintenance management for photovoltaic power systems

Survey of maintenance management for photovoltaic power systems

Review of mismatch mitigation techniques for PV modules

Performance Enhancement of a Partially Shaded Photovoltaic Array by Optimal Reconfiguration and Current Injection Schemes

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