Power and mismatch losses mitigation by a fixed electrical reconfiguration technique for partially shaded photovoltaic arrays

Satpathy, Priya Ranjan; Sharma, Renu

doi:10.1016/j.enconman.2019.04.039

Cited by 108 publications

(33 citation statements)

References 21 publications

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“…In fact, this is consistent with (8), (9) and (10). By dispersing the shadows, the difference between row currents is minimized, thereby maximizing the minimum row current to increase the output power of the PV array and allowing as many PV modules as possible to participate in power generation without being bypassed; this is the essence of irradiance equalization.…”

Section: A Essence Of the Irradiance Equalization Principlesupporting

confidence: 79%

“…The power loss caused by partial shading is not only related to the shading conditions but also to the interconnection mode of a PV array [6]; among these modes, series-parallel (SP), total-cross-tied (TCT), and bridge-linked (BL) are the most common [7]. It has been found that the TCT topology can minimize mismatch losses and increase reliability better than other configurations [8]- [9]. However, despite reducing the mismatch loss to a certain extent, these interconnection schemes still fail to maximize the output power.…”

Section: Introductionmentioning

confidence: 99%

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Optimal Photovoltaic Array Dynamic Reconfiguration Strategy Based on Direct Power Evaluation

et al. 2020

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In actual operation, photovoltaic arrays inevitably encounter shadow problems, resulting in a power output decline and multiple peaks in the output characteristics. The effect of partial shade can be satisfactorily reduced by photovoltaic array reconfiguration. Almost all current reconfiguration techniques are based on the irradiance equalization principle. However, by analyzing the output characteristics of photovoltaic array, it is found that the irradiance equalization principle improves the output power by increasing only the minimum row current without considering the effect of the voltage, so the reconfiguration techniques based on this principle cannot obtain the global optimal configuration under some partial shading conditions. In order to maximize the output power of photovoltaic array under any partial shaded condition, this paper proposes a reconfiguration strategy based on direct power evaluation. In this approach, the reconfiguration problem is formulated as a 0-1 multi-knapsack problem, and a novel mathematical model is established to directly evaluate the maximum output power of photovoltaic array. Then, the optimal reconfiguration scheme is determined by solving the mathematical model. Finally, the effectiveness of the proposed reconfiguration strategy is proved in theory and simulations.

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Section: A Essence Of the Irradiance Equalization Principlesupporting

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Optimal Photovoltaic Array Dynamic Reconfiguration Strategy Based on Direct Power Evaluation

et al. 2020

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“…The solar panel is of polycrystalline in nature as such type of SPV modules involves lesser production cost, which may tend to augment the overall system performance. 27,28 The system has been tested and studied under the standard testing condition (STC), where modules receive an irradiance of 1000 W/m 2 , with temperature of 25°C and air mass (AM) = 1.5. The power generation for the PV modules, I~V characteristics, and P~V characteristics of SPV modules during constant irradiance and varying irradiance is shown in the Appendix, ie from Figure A…”

Section: Modeling Of the Spv Arraymentioning

confidence: 99%

Demonstrating the benefits of thermoelectric‐coupled solar PV system in microgrid challenging conventional integration issues of renewable resources

Jena

Kar

2019

Int J Energy Res

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Incorporation of solar photovoltaic (SPV) and thermoelectric (TE), termed as solar photovoltaic-thermoelectric (SPV-TE) hybrid system, is found be a very promising technique in widening the utilization of solar spectrum and improving the power yield viably cum-proficiently. This hybrid architecture caters electrical energy with additional thermal energy, which signifies upon harnessing of solar insolation in an exceptional way. The implementation of the aforementioned system in microgrid (MG) leads to procurement of higher active power and comparably lesser reactive power to the system. Many nonconventional energy sources have been implemented for power generation in MG in spite of their instability and reconciliation issues. This article portrays upon the main concern of implementing only SPV-TE system in MG by considering two systems to analyze and compare. Those two systems, ie, SPV-wind energy system (SPV-WES)/fuel cell technology (FCT) and SPV-thermoelectric generator (SPV-TEG)-WES/FCT, were analyzed and validated over the employment of only the SPV-TEG system. For WES and FCT, the proposed system delivers higher active power near about 20% to 70% over the conventional MG and the TEG-integrated MG; 21% to 52% lesser reactive power is absorbed over the conventional MG and 7% to 17% higher reactive power is absorbed over the TEG-integrated MG. This, thus, brings about the lesser multifaceted nature in source incorporation and moderating the cons of coordinating WES and FCT, considering all its application. The proposed replaceable SPV-TEG framework in MG is observed to exceed expectations over the two frameworks offering ascend to a noteworthy leap forward in advancement of SPV. The whole system was studied, analyzed, and validated in MATLAB/Simulink environment.

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“…The notable static reconfiguration techniques are Su Do Ku [22], optimal Su Do Ku [23], improve Su Do Ku, futoshiki [24], competence square (CS) [25], dominance square (DS) [26], and the Zig-Zag scheme [27]. Other innovative rearrangements for fixed reconfiguration are presented in [28], [29]. Furthermore, an optimal fixed reconfiguration technique is proposed by reducing row spacing between arrays in [30].…”

Section: Introductionmentioning

confidence: 99%

A Robust Strategy Based on Marine Predators Algorithm for Large Scale Photovoltaic Array Reconfiguration to Mitigate the Partial Shading Effect on the Performance of PV System

et al. 2020

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Large-scale solar photovoltaic (PV) plants play an essential role in providing the increasing demand for energy in recent time. Therefore, in the purpose of achieving the highest harvested power under the partial shading conditions as well as protecting the PV array from the hot-spot calamity, the PV reconfiguration strategy is established as an efficient procedure. This is performed by redistribution of PV modules according to their levels of shading. Motivated by this, the authors in this article have introduced a novel population-based algorithm that is known as marine predators algorithm (MPA) to restructure the PV array dynamically. Moreover, a novel objective function is introduced to enhance the algorithm performance rather than utilizing the regular weighted objective function in the literature. The effectiveness of the proposed algorithms based on the novel objective function is evaluated using several metrics such as fill factor, mismatch losses, percentage of power loss, and percentage of power enhancement. Besides, the obtained results are compared with a regular total-cross-tied (TCT) connection, manta ray foraging optimization (MRFO), harris hawk optimizer (HHO) and particle swarm optimizer (PSO) based reconfiguration techniques. Furthermore, to demonstrate the suitability of the proposed methods, large scale PV arrays of 16 × 16 and 25 × 25 are considered and evaluated. The results reveal that MPA enhanced the PV array power by percentage of 28.6 %, 2.7 % and 5.7 % in cases of 9 × 9, 16 × 16 and 25 × 25 PV arrays, respectively. The comprehensive comparisons endorse that MPA shows a successful shade dispersion; hence the number of multiple peaks in the PV characteristics has reduced, and high values of power have been harvested with least mean execution time in comparison with PSO, HHO and MRFO. Moreover, the Wilcoxon signed-rank test has been accomplished to confirm the reliability and applicability of the proposed approach for the PV large scale arrays as well.

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Power and mismatch losses mitigation by a fixed electrical reconfiguration technique for partially shaded photovoltaic arrays

Cited by 108 publications

References 21 publications

Optimal Photovoltaic Array Dynamic Reconfiguration Strategy Based on Direct Power Evaluation

Optimal Photovoltaic Array Dynamic Reconfiguration Strategy Based on Direct Power Evaluation

Demonstrating the benefits of thermoelectric‐coupled solar PV system in microgrid challenging conventional integration issues of renewable resources

A Robust Strategy Based on Marine Predators Algorithm for Large Scale Photovoltaic Array Reconfiguration to Mitigate the Partial Shading Effect on the Performance of PV System

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