Energy generation in PV grid-connected systems: power extraction optimization for plant oriented PV generators

Velasco, G.; Negroni, J.J.; Guinjoan, F.; Pique, R.

doi:10.1109/isie.2005.1529064

Cited by 13 publications

(11 citation statements)

References 1 publication

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“…However, this does not change the modules' physical location in the PV array, and shading mitigation is accomplished by dynamically adjusting the modules' electrical interconnections. The equalization index (EI) concept, which quantifies the degree of irradiance equalization, was proposed in [8]. Accordingly, the best arrangement is the one that keeps the EI as low as possible.…”

Section: Nomenclaturementioning

confidence: 99%

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Improved Dynamic Reconfiguration Strategy for Power Maximization of TCT Interconnected PV Arrays under Partial Shading Conditions

Loukriz,

Kichene,

Bendib

et al. 2024

Preprint

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In photovoltaic (PV) systems, partial shading is a major issue that may cause power losses, hot spots, and PV modules damage. Thus, PV array dynamic reconfiguration approaches based on irradiance equalization (IEq) between rows have been proposed to alleviate the shading effect thereby improving PV power production. However, the existing IEq-based reconfiguration techniques focus only on the minimization of row current error, without taking into consideration the voltage effect, which in turn, may result in power losses. In this regard, an improved reconfiguration strategy is proposed in the present paper to maximize the power production of a TCT interconnected PV array operating under partial shading conditions (PSCs). The proposed strategy aims to achieve a PV array reconfiguration that mitigates the droop voltage issue by considering irradiance levels in both rows and columns. An in-depth investigation of a typical PV module and TCT module is provided, demonstrating that there are cases where the partial shading does not affect the PV module current but the operating voltage. In addition, an analysis highlighting the limitations of the IEq technique regarding the droop voltage issue is presented. Furthermore, mathematical development is established for deriving the objective function of the proposed strategy. The efficiency of the proposed reconfiguration strategy is assessed through experimental tests carried out on a 20 MWp PV station in Ain El-Melh, Algeria. The obtained results reveal that the proposed method overcomes the weaknesses of the existing IEq strategy and ensures power production higher than the TCT and IEq configurations by 17.25% and 19.34%, respectively.

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Section: Nomenclaturementioning

confidence: 99%

“…Considering an array consisting of (n×m) PV modules, each module's irradiance is identified using conventional matrix notation. With a module located in row i and column j operating under an irradiance of Iij, the total irradiance of column j and row i [8], can be defined as follows:…”

Section: Proposed Strategy For Pv Power Maximizationmentioning

confidence: 99%

Improved Dynamic Reconfiguration Strategy for Power Maximization of TCT Interconnected PV Arrays under Partial Shading Conditions

Loukriz,

Kichene,

Bendib

et al. 2024

Preprint

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“…Consequently, the individual irradiance summation for the PVMs in a single row determines the total circulating current in a string. Velasco et al [116,117] introduced an equalization index (EI) based optimization algorithm. The main idea of this approach is to use electronic switches to equalize the irradiance of PVMs in each row, thereby, reducing the mismatch losses.…”

Section: Approaches For Reconfigurationmentioning

confidence: 99%

Static and Dynamic Reconfiguration Strategies for Reducing Partial Shading Effects in Photovoltaic Array: A Comprehensive Review

Anjum

Mukherjee²

2022

Energy Tech

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The output power generated by a photovoltaic (PV) cell decreases remarkably because of the irregular irradiance pattern. Thus, the overall system performance is degraded. The decrease in the power output is not dependent on the shaded area but is rather dependent on the array configuration and the shading pattern. To eliminate partial shadings, many strategies have been documented in the state‐of‐the‐art literature. These strategies may not improve the maximum output power to the required level but definitely do so to a certain extent. Thus, to minimize these losses, a promising reconfiguration approach is needed, i.e., reconfiguring the PV modules inside the PV array to improve the maximum power output. These techniques are broadly divided into two categories, viz., static and dynamic reconfiguration methods. The advanced PV array reconfiguration solutions to improve global power output under mismatch and partial shading scenarios are presented in this article. According to the results of the review article studied in this research, dynamic approaches are costlier as compared to static reconfiguration strategies, but are more effective to reduce the partial shading impact in comparison to the static techniques.

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“…In [8], an optimisation algorithm has been presented, based on using an equalisation index. Moreover, an irradiance equalising algorithm has been presented in [23] in this regard. The system includes a fixed and reconfigurable section, controlled by the relevant algorithm.…”

Section: Introductionmentioning

confidence: 99%

Method based on graph theory to extract the best switch set for reconfiguration of photovoltaic panels

Iraji

Farjah

Ghanbari

2019

IET Generation, Transmission & Distribution

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Energy generation in PV grid-connected systems: power extraction optimization for plant oriented PV generators

Cited by 13 publications

References 1 publication

Improved Dynamic Reconfiguration Strategy for Power Maximization of TCT Interconnected PV Arrays under Partial Shading Conditions

Improved Dynamic Reconfiguration Strategy for Power Maximization of TCT Interconnected PV Arrays under Partial Shading Conditions

Static and Dynamic Reconfiguration Strategies for Reducing Partial Shading Effects in Photovoltaic Array: A Comprehensive Review

Method based on graph theory to extract the best switch set for reconfiguration of photovoltaic panels

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