A Novel Fixed PV Array Configuration for Harvesting Maximum Power From Shaded Modules by Reducing the Number of Cross-Ties

Bonthagorla, Praveen Kumar; Mikkili, Suresh

doi:10.1109/jestpe.2020.2979632

Cited by 55 publications

(9 citation statements)

References 29 publications

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“…G. S. Krishna et al [27] have presented an electrical reconfiguration strategy for mitigating the PSCs wherein switches are used to disperse the shaded PV modules such that multiple peak points are mitigated. P. K. Bonthagorla et al [28] have presented a triple tied PV array configuration for maximum power generation under PSCs.…”

Section: B Literature Reviewmentioning

confidence: 99%

Investigation on Effect of Irradiance Change in Maximum Power Extraction From PV Array Interconnection Schemes During Partial Shading Conditions

2021

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This paper presents the effect of irradiance change in solar photovoltaic (PV) array interconnection schemes under partial shading conditions (PSCs) for optimal selection of PV interconnection schemes in order to extract maximum power (MP) from the PV array. A 4×4 PV array is considered to examine the well-known PV interconnection schemes under different shading scenarios at distinct irradiance conditions. Simulation studies and experimental verification are carried out by considering a 30 W PV panel to analyse the performance of the PV array under various dynamic conditions. Comprehensive analysis in terms of fill factor, output power and mismatching power loss is presented by considering different interconnection schemes under various shading scenarios and irradiance levels. From the simulation studies and experimental verification, it is observed that the irradiance magnitude has a significant impact on the PV power generation from array interconnection schemes under PSCs wherein the performance characteristics of the array interconnection schemes vary with the variation in irradiance levels. It is also identified that the irradiance factor needs to be considered as a design variable while selecting the optimal PV array interconnection schemes for maximum power extraction under PSCs.

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Section: B Literature Reviewmentioning

confidence: 99%

Investigation on Effect of Irradiance Change in Maximum Power Extraction From PV Array Interconnection Schemes During Partial Shading Conditions

2021

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“…Ref. [21] suggests a triple tide connection to enhance the power extraction. Many authors have utilized different reconfiguration strategies to reduce the downside of the TCT configuration under partial shading conditions.…”

Section: Configuration and Reconfiguration Techniquesmentioning

confidence: 99%

Non-Symmetrical (NS) Reconfiguration Techniques to Enhance Power Generation Capability of Solar PV System

et al. 2022

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At present, primary power generation depends on non-renewable energy resources, which will become extinct. Solar is the best option in renewable energy sources to achieve clean and green power extraction. Solar PV transforms light energy into electrical energy. However, the output power of solar PV changes with solar insolation. It is also affected by environmental factors and the shading effect. One of the key factors that can reduce the PV system output power is partial shading condition (PSC). The reduction in power output not only depends on shaded region but also depends on pattern of shading and physical position of shaded modules in the array. Due to PSCs, mismatch losses are induced between the shaded modules which can cause several peaks in the output power–voltage (P-V) characteristic. This article describes the non-symmetrical reconfiguration technique and compares it with the primary total cross tied connection. The performance of non-symmetrical reconfiguration techniques is evaluated and compared in terms of global maximum power (GMP), voltage and currents at GMP, open and short circuit voltage and currents, mismatch power loss (MPL), fill factor, efficiency, and number of local maximum power peaks (LMPPs) on a 9 × 9 PV array.

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“…In a parallel configuration, the output array voltage is the same as the individual module voltage, while the output current is the sum of parallel-connected modules' current [17]. As the output current is less in a series array configuration and the output voltage is less in a parallel array configuration; therefore series (S) and parallel (P) configurations are combined to form a series-parallel (SP) array configuration to acquire the desired amount of voltage and current at its output from the PV system [18].…”

Section: Introductionmentioning

confidence: 99%

A Novel Benzene Structured Array Configuration for Harnessing Maximum Power From PV Array Under Partial Shading Condition With Reduced Number of Cross Ties

et al. 2022

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Partial shading (PS) phenomena significantly degrade the power output from the photovoltaic (PV) array.Due to the PS effect, there is a mismatch in current between the PV modules of a series-connected PV string. As a result, inshaded module power dissipates, resulting in increased module temperature and the creation of local hotspots. To avoid the hotspot effect, bypass diodes are connected anti-parallel to the PV modules. But the activation of bypass diodes creates multiple peaks in I-V and P-V characteristics. The effect of PS can be reduced by using a suitable array configuration and the performance of the PV array gets improved. Among all the existing PV array configurations, the total cross-tied (TCT) configuration performs better under partial shading conditions (PSCs). But the disadvantage of TCT is that it has an enormous number of tie connections, creating complexity in an array configuration and, therefore, more cable losses. The main objective of this paper is to propose a novel array configuration named benzene (BZ) configuration, which eliminates the demerits of the TCT array configuration. Benzene configuration has improved performance with fewer tie connections compared to conventional tie-connected configurations such as TCT, bridge link (BL), and honeycomb (HC). The performance of the tie-connected array configurations is analyzed under different PSCs by considering the various performance parameters such as global maximum power (GMP), the voltage at maximum power (Vmp), current at maximum power (Imp), mismatch loss (ML), shading loss (SL), fill factor (FF) and performance ratio. It is observed that the proposed benzene array configuration gives better output performance, even having lower mismatch losses with a reduced amount of tie connections. Further, the effect of the bypass diode on a partially shaded PV string is investigated through MATLAB Simulation and experimental analysis.INDEX TERMS PV array configurations, Benzene array configuration, Maximum output power, Fill factor (FF), Shading loss (SL), Mismatch loss (ML), partial shading condition (PSC). Nomenclature BZ Benzene kBoltzmann constantThis article has been accepted for publication in IEEE Access.

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A Novel Fixed PV Array Configuration for Harvesting Maximum Power From Shaded Modules by Reducing the Number of Cross-Ties

Cited by 55 publications

References 29 publications

Investigation on Effect of Irradiance Change in Maximum Power Extraction From PV Array Interconnection Schemes During Partial Shading Conditions

Investigation on Effect of Irradiance Change in Maximum Power Extraction From PV Array Interconnection Schemes During Partial Shading Conditions

Non-Symmetrical (NS) Reconfiguration Techniques to Enhance Power Generation Capability of Solar PV System

A Novel Benzene Structured Array Configuration for Harnessing Maximum Power From PV Array Under Partial Shading Condition With Reduced Number of Cross Ties

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