Power enhancement of PV system via physical array reconfiguration based Lo Shu technique

Venkateswari, R.; Rajasekar, N.

doi:10.1016/j.enconman.2020.112885

Cited by 109 publications

(49 citation statements)

References 35 publications

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“…In this paper, various types of PV array configuration models are reviewed and investigated in terms of their performance parameters such as accuracy, reliability, (BL-HC) 3 [118,126,136] RTCT 2 [100,118] [91] New configuration 1 [93] Novel configuration 1 [120] SDS configuration 1 [120] Latin square (LS) 1 [129] Dominance Square (DS) 2 [130,139] OE configuration 1 [133] Skyscraper 1 [134] Ladder configuration 1 [136] Competence Square (CS) 3 [139,143,147] Lo-Shu 1 [139] Metaheuristic-TCT based PV array configurations GA 5 [142][143][144][145]147] PSO (ASM based configuration)…”

Section: B Liteature Reviewmentioning

confidence: 99%

“…A critical approach is adopted for extensive analysis of TCT, Su-Do-Ku, DS, Competence Square (CS), and Lo Shu puzzle-based configurations (9×9 size) is carried out in [139]. Novel performance indexes such as capacity factor (CF), execution ratio (ER), and capture loss (CL) are included along with conventional parameters for result analysis perspective under SW, LW, LN, and SN shading conditions (200W/m 2 -900 W/m 2 ).…”

Section: (P) Cs and Lo Shu Configurationsmentioning

confidence: 99%

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Impact of Partial Shading on Various PV Array Configurations and Different Modeling Approaches: A Comprehensive Review

Pachauri

Mahela²,

Sharma

et al. 2020

IEEE Access

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Since the last decade, partial shading conditions (PSCs) and its adverse influences on photovoltaic (PV) system performance have received due attention. It motivates researchers to explore methods to diminish/disperse the shading effects and/or novel PV array configurations to sustain under PSCs. To diminish the effects of PSCs, this paper presents a comprehensive review of various PV array configuration models for PV systems and metaheuristic approaches for shade dispersion effectively. Different PV array modeling approaches are identified, emphasizing their benefits, inadequacies and categorized according to vital features such as shade dispersion and improved performance in terms of efficiency; fill factor (FF), and maxima power, minimized power losses (PL) primarily. Besides these various PV array configurations such as hybrid, reconfigured, mathematical/game puzzle based advanced configurations are uniquely discussed with the existing configurations. In the current scenario, the metaheuristic algorithms are explored and widely accepted by researchers due to the long wire length requirement for PV array reconfiguration. This paper discusses and deliberates recent developments in methods of solar PV performance enhancement that deserves further study. Overall, the present study is helpful for academicians and researchers in the committed solar power installation area. INDEX TERMS Photovoltaic system, partial shading condition (PSC), game puzzle, total cross-tied (TCT), honey comb, bridge link, metaheuristic algorithm.

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Section: B Liteature Reviewmentioning

confidence: 99%

Section: (P) Cs and Lo Shu Configurationsmentioning

confidence: 99%

Impact of Partial Shading on Various PV Array Configurations and Different Modeling Approaches: A Comprehensive Review

Pachauri

Mahela²,

Sharma

et al. 2020

IEEE Access

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show abstract

“…Similarly, Lo-Shu technique was proposed in Ref. 20, to disperse the shade over the PV array to minimize the difference of row current. The outcomes of this technique confirmed that the Lo-Shu technique was more effective and generates higher power compared with the TCT, Su-Do-Ku, and CS techniques.…”

Section: Introductionmentioning

confidence: 99%

Optimal dynamic reconfiguration of large‐scale PV plant under partial shading conditions based on two reconfigurable stages

Ajmal

Ramachandaramurthy

Tomar

et al. 2021

Int Trans Electr Energ Syst

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Varying solar radiation on photovoltaic (PV) panels reduces the PV system's output and increases the mismatch losses. Several techniques have been proposed to solve the mismatch problem, for example, the reconfiguration technique of PV panels.Most of the reconfiguration techniques have been proposed for small systems because of the difficulty in applying to large systems as a large number of switches are required for such applications. In this paper, a new technique based on total-cross-tied (TCT) in two reconfigurable stages is proposed. In the first stage, the shading over the PV plant is dispersed by switching between arrays. In the second stage, the shade dispersion from the first stage is increased by optimizing between the columns. The number of switches and sensors were reduced by using genetic algorithm, thus reducing the system cost. To demonstrate the proposed new reconfiguration technique, four shaded cases were simulated and tested using MATLAB/SIMULINK. A comprehensive analysis of power-voltage (P-V) curves and row currents calculation was performed, for TCT configuration and the proposed new reconfiguration technique. Also, a comparative study on performance analysis, energy-saving, and income generation was carried out for each shading case. The comparative study of the four cases shows that the reconfiguration techniques proposed in two stages generate more power under partial shading conditions than TCT. Further research is needed to ensure the practicality of the switches needed to realize this technique.

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“…Recently, reconfiguration techniques are playing a major role in combatting the effect of partial shading that adopt the principle of either changing the electrical connection or placement of PV modules to disperse the effect of shading in the entire array [23]. Some of these techniques include: shade dispersion scheme [24], magic square [25], SDP [26], SD-PAR [27], optimal Sudoku [28], fixed electrical reconfiguration [29], Lo Shu technique [30], etc. However, these techniques directly or indirectly adopt the existing TCT configuration and create wiring complexities and difficulties in fault diagnosis.…”

Section: Introductionmentioning

confidence: 99%

Impact of Uneven Shading by Neighboring Buildings and Clouds on the Conventional and Hybrid Configurations of Roof-Top PV Arrays

Satpathy

Babu

Shanmugam³

et al. 2021

IEEE Access

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Partial shading is the commonly encountered scenario of building roof-top based PV arrays that mainly occur due to the shadow of the neighbouring buildings and clouds resulting in unexpected losses and deteriorated system performance. The arrays are connected in various configurations to enhance the system performance during shading. In this paper, various conventional and hybrid interconnection configurations based on series-parallel (SP), bridge-linked (BL), and total cross tied (TCT) topologies of the roof-top PV arrays are examined under various partial shading scenarios caused by the neighbouring building and clouds. The investigation is done for a 9x9 roof-top array in MATLAB/Simulink environment considering various comparison parameters. It has been found that during 1.23%, 7.40%, 11.11%, 17.75%, 18.51%%, 22.22%, and 24.69% of total array shading, SP generated the maximum power whereas, during 30.86%, 61.72% shading, TCT has the generated only a slightly higher power as compared to SP. Hence, the study concludes that the configurations have a puny effect on the power generation of the arrays during uneven shading patterns caused by buildings and clouds.

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Power enhancement of PV system via physical array reconfiguration based Lo Shu technique

Cited by 109 publications

References 35 publications

Impact of Partial Shading on Various PV Array Configurations and Different Modeling Approaches: A Comprehensive Review

Impact of Partial Shading on Various PV Array Configurations and Different Modeling Approaches: A Comprehensive Review

Optimal dynamic reconfiguration of large‐scale PV plant under partial shading conditions based on two reconfigurable stages

Impact of Uneven Shading by Neighboring Buildings and Clouds on the Conventional and Hybrid Configurations of Roof-Top PV Arrays

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