Analysis of a partially shaded PV array considering different module connection schemes and effects of bypass diodes

Wang, Yaw-Juen; Lin, Shu-Syuan

doi:10.1109/icuepes.2011.6497768

Cited by 23 publications

(32 citation statements)

References 16 publications

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“…The three basic topology configurations with the combination of both 3X3 and 4X4 PV arrays are discussed [14] and are shown in Fig.4 …”

Section: Shading Effect On Pv Array Configurationsmentioning

confidence: 99%

“…The present proposed system by using a new technique called magic square overcomes the drawback of the Sudoku method just by configuring the physical location of the TCT modules whereas in the electrical connections are unaltered by doing this modification the effect of shadow has been dispersed throughout the array and thereby lowering the influence of shadow effect of that module in that row [12,13]. Alterations in the arrangement in the solar arrays were discussed in [14] but it is concluded with only one irradiation values, it is required to conclude the same with multiple irradiations. The method used in [17] uses a sub-arrays concept to reduce some typical issues like reducing wiring length etc., but the complexity in array configuration is retained.…”

Section: Introductionmentioning

confidence: 99%

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Shadow dispersion of PV Array under variable irradiance for superior power Generation by Magic Square Configuration

Reddy¹,

Reddy²,

Kumar³

2018

IJET

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The PV array generates smaller amount of the power compared with other electrical power generation components. There are many components that are adversely effected the output of PV array in such components, one is partial shading. Due to this, each module in PV array receives different solar irradiations causes different P-V characteristics of its peak values. This paper presents a pioneering method called as Magic Square configuration has been proposed to enhance the generated power of photovoltaic modules by configuring those are under affect of shade. Thus there is no change of electrical arrangement of PV modules in an array but only the objective location in the total cross tied (TCT) array is rearranged according to the magic square arrangement. Proposed paper gives comparison data with the conventional configuration method and hence the performance is calculated. The proposed technique provides a better solution that how shadow effect on the PV modules has been reduced and how this shadow is distributed, and not only that also gives an idea about how the inequality losses due to the partial shading is effectively reduced. The power loss of various configurations of 3X3 and 4X4 array has been compared. The proposed technique is validated through MATLAB/Simulink environment.

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“…The three basic topology configurations with the combination of both 3X3 and 4X4 PV arrays are discussed [14] and are shown in Fig.4 …”

Section: Shading Effect On Pv Array Configurationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Shadow dispersion of PV Array under variable irradiance for superior power Generation by Magic Square Configuration

Reddy¹,

Reddy²,

Kumar³

2018

IJET

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“…The present paper comprises literature review of the most appropriate research papers, which are studied for obtaining the research gap. The various types of PV array configurations are reviewed in their performance, reliability, accuracy, robustness, efficiency, and execution of each configuration …”

Section: Introductionmentioning

confidence: 99%

Shade dispersion-based photovoltaic array configurations for performance enhancement under partial shading conditions

Pachauri

Yadav

Chauhan³

et al. 2018

Int Trans Electr Energ Syst

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Summary Recently, the partial shading conditions (PSCs) and its impact on the performance of photovoltaic (PV) systems have motivated to explore novel approach to minimize the PSC adverse effect. In this context, the existing PV arrays are reconfigured to overcome the effects of PSCs. This paper presents a comprehensive and comparative study of existed total cross‐tied (TCT) configuration with a novel Latin square puzzle‐based TCT configuration called Latin square‐TCT (LS‐TCT) to minimize the shading effects. An investigation is carried out based on the considered partial shading patterns (progressive bottom to top, left to right, diagonal, multistory building, and zigzag shading cases) in global maximum power point (GMPP), power loss, and fill factor. The performance of LS‐TCT configuration is compared with benchmark TCT configuration. It is noticed that the proposed LS‐TCT configuration has maximum power of 2279 W as compared with 1976 W for TCT configuration at global maximum power point for a shading case. Further, it is also shown that the minimum power losses in proposed LS‐TCT configuration are reduced to 330 W as compared with 633 W for TCT configuration. Moreover, the fill factor in the proposed LS‐TCT configuration is 9.91 as compared with 8.59 for TCT configuration under the considered PSCs. Overall, the performance of LS‐TCT configuration is found to be superior as compared with TCT configuration.

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“…The current and voltage generated by a single photovoltaic cell are not enough for the load. Generally, many photovoltaic cells are connected in series or in parallel to create a photovoltaic module [16]. In a photovoltaic power station, several modules are connected in series or in parallel.…”

Section: Model Of Photovoltaicmentioning

confidence: 99%

Research on Parameter Distribution Features of Photovoltaic Array under the Cover and Shadow Shading Conditions

Zhu

et al. 2018

International Journal of Photoenergy

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The outdoor operating photovoltaic arrays have two different shading conditions, shadowing and covering. The shading causes a decrease in output power of photovoltaic system and may bring hot spots which causes physical damage to the array. This paper studies the electrical parameter distribution feature of photovoltaic array under different shading conditions by means of analog simulation and empirical testing. Through introducing theoretical computational method of the electrical parameters, it describes the distribution features of the electrical parameters of photovoltaic array. The results indicate that the influence of local shadowing on the current of array can be neglected. Shadowing decreases the optimal operating voltage while covering leads to a decrease in the optimal operating voltage and the open-circuit voltage. The drop magnitude of voltage is associated with the number of the shaded cell strings and the string voltage. The two shading types can be identified on the basis of distribution rules of open-circuit voltage and optimal operating voltage. Simulations and experiments verify the consistency of the rules. Relevant conclusions provide a reference for modeling, online fault diagnosis, and optimization design of the maximum power tracking algorithm of photovoltaic array under different shading conditions.

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Analysis of a partially shaded PV array considering different module connection schemes and effects of bypass diodes

Cited by 23 publications

References 16 publications

Shadow dispersion of PV Array under variable irradiance for superior power Generation by Magic Square Configuration

Shadow dispersion of PV Array under variable irradiance for superior power Generation by Magic Square Configuration

Shade dispersion-based photovoltaic array configurations for performance enhancement under partial shading conditions

Research on Parameter Distribution Features of Photovoltaic Array under the Cover and Shadow Shading Conditions

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