PV arrays reconfiguration for partial shading mitigation: Recent advances, challenges and perspectives

Yang, Bo; Ye, Haoyin; Wang, Jingbo; Li, Jiale; Wu, Shaocong; Li, Yulin; Shu, Hongchun; Ren, Yaxing; Hua, Yi

doi:10.1016/j.enconman.2021.114738

Cited by 113 publications

(37 citation statements)

References 106 publications

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“…For the purpose of mitigating the effects of PSC as well as enhancing the power generation of PV station, altering the topological structure of PV components is employed, which could equivalently disperse the originally-centralized shadow on the array surface to the whole array. In recent years, researchers have developed multiple methods of PV arrays reconfiguration, which are classified mainly into static reconfiguration techniques and dynamic techniques (Kaushika and Gautam, 2003;Yang et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Power Grid Frequency Regulation Strategy for Photovoltaic Plant Based on Multi-Objective Harris Hawks Optimization

Wang

Chang

et al. 2021

Front. Energy Res.

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To settle the issue of balance between two objectives, i.e., photovoltaic (PV) power station output power maximization and frequency regulation (FR) signals response, a novel PV reconfiguration strategy is proposed in this work, which maximizes the output power through PV reconfiguration, and meanwhile utilizes the energy storage system (ESS) to decrease the PV plant generated power’ deviation from FR signals. Above all, a model of PV-storage power station reconfiguration is designed to minimize the power bias of both rated power and FR signals. Then, the multi-objective Harris hawks optimization (MHHO) is used to obtain the Pareto front which can optimize the above two objectives due to its high optimization efficiency and speed. Subsequently, the optimal compromise solution is selected by the decision-making method of VIseKriterijumska Optimizacija I Kompromisno Resenje (VIKOR). Aiming to substantiate the efficacy of the proposed technique, the case studies are carried out under partial shading condition (PSC) with constant and time-varying FR signals. The simulation results show that, compared with the situation without optimization, the power deviations of the two objectives are reduced by 25.11 and 75.76% under constant FR signals and 23.27 and 55.81% under time-varying FR signals by proposed method, respectively.

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Section: Introductionmentioning

confidence: 99%

Power Grid Frequency Regulation Strategy for Photovoltaic Plant Based on Multi-Objective Harris Hawks Optimization

Wang

Chang

et al. 2021

Front. Energy Res.

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“…Shading of the solar radiation of some module surfaces in the array due to any environmental factor affects the module efficiency, array efficiency and thus the efficiency of the PV system [48][49][50][51][52]. Various techniques are applied to reduce the shading effect [53]. However, applying strategies such as electrical interconnection changes or using microinverters in large-scale systems makes the system complex and increases its cost.…”

Section: Discussionmentioning

confidence: 99%

Determination of the appropriate zone on dam surface for floating photovoltaic system installation using RS and GISc technologies

Yılmaz

Gülgen

Ateş

2023

International Journal of Engineering and Geosciences

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Remote sensing GIS Google Earth Engine Solar power plant Solar analysisThis study aims to reveal suitable places where floating photovoltaic-solar power plants (FPV-SPPs) can be installed on the dam surface using the possibilities of remote sensing (RS) and geographical information science (GISc) technologies. Past satellite images from Landsat and Sentinel platforms allow researchers to analyse shoreline changes in the dam surface. Shoreline extraction is a crucial process for the FPV-SPP to stay afloat despite external constraints. In this study, changes in dam water levels were determined by classifying 20-year satellite images and analysing a 32-year global surface water dynamics dataset. The water surface area was calculated as 1,562.40 ha using the random forest (RF) algorithm and the normalized differences water index (NDWI) on Google Earth Engine (GEE) cloud platform. In addition, solar analysis was carried out with GISc using annual solar radiation maps shuttle radar topography mission (SRTM) data, which directly affects the energy production of FPV-SPPs. It has been calculated that the solar radiation on the water surface varies between 1,554 kWh/m 2 -year and 1,875 kWh/m 2 -year. These calculated values were divided into five different classes, and it was observed that 88.5% of the dam surface had a very high level of solar radiation compared to other areas. Higher efficiency will be obtained from the FPV-SPP to be installed in this region compared to the systems to be installed in other regions. It has been observed that the radiation values in other parts of the water surface are lower due to topographic shading. These analyses revealed energy zones with high production potential, thereby easing the decision-making process for investors planning to establish FPV-SPPs.

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“…The consequence of this phenomenon is that the energy generated by PV array is not fully utilized, which damages PV modules, shortens the service lifetime, and leads to economic losses. To mitigate this impact, PV reconfiguration technologies are recommended to disperse shadows uniformly, which are divided into static array reconfiguration and dynamic array reconfiguration (Yang et al, 2021a). In contrast to static array reconfiguration method, dynamic reconfiguration brings targeted change to the electrical connection between the PV modules according to the present irradiation on the PV array, which is more flexible and efficient.…”

Section: Introductionmentioning

confidence: 99%

Evaluations of Practical Engineering Application of Photovoltaic Reconfiguration Technology

2022

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2018 Row current, execution time, total income per year, standard deviation (SD) Modified Harris hawks algorithm (Yousri et al., 2020a) 2020 Row current, mismatch loss, fill factor (FF), percentage power loss, power enhancement, execution time Marine predators algorithm (Yousri et al., 2020b) 2020 Row current, mismatch loss, FF, percentage power loss, power enhancement, execution time Grey wolf optimization algorithm (Balraj and Stonier, 2020) 2020 Global shade dispersion index, total irradiance value of each row, power enhancement Butterfly optimization algorithm (Fathy, 2020) 2020 Row current, mismatch loss, FF, power enhancement, PR Artificial ecosystem-based optimization (Yousri et al., 2020c) 2020 Row current, power enhancement, mismatch loss, execution time, FF Democratic political algorithm (Yang et al., 2021b) 2021 Power enhancement, mismatch loss, execution time, FF, SD FIGURE 1 | Structure of the proposed switching matrix in literature.

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PV arrays reconfiguration for partial shading mitigation: Recent advances, challenges and perspectives

Cited by 113 publications

References 106 publications

Power Grid Frequency Regulation Strategy for Photovoltaic Plant Based on Multi-Objective Harris Hawks Optimization

Power Grid Frequency Regulation Strategy for Photovoltaic Plant Based on Multi-Objective Harris Hawks Optimization

Determination of the appropriate zone on dam surface for floating photovoltaic system installation using RS and GISc technologies

Evaluations of Practical Engineering Application of Photovoltaic Reconfiguration Technology

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