Partial Shading Analysis of Multistring PV Arrays and Derivation of Simplified MPP Expressions

Psarros, Georgios N.; Batzelis, Efstratios; Papathanassiou, Stavros A.

doi:10.1109/tste.2015.2389715

Cited by 50 publications

(37 citation statements)

References 27 publications

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“…The negative voltage modeling part is expressed as a quadratic function [130]. An improved single diode model presented in [4] is used for modeling in [131]. The modeling process is extension of [132] where simplified expressions are developed and are implemented for generalized multi-string arrays.…”

Section: Non-iterative Methodsmentioning

confidence: 99%

Modeling of photovoltaic system for uniform and non-uniform irradiance: A critical review

Jena

Ramana

2015

Renewable and Sustainable Energy Reviews

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Section: Non-iterative Methodsmentioning

confidence: 99%

Modeling of photovoltaic system for uniform and non-uniform irradiance: A critical review

Jena

Ramana

2015

Renewable and Sustainable Energy Reviews

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“…This brings a new parameter of pooling of some temporal exchanges in electricity market. Single diode and two diode models are presented with their complete mathematical formulations [9][10][11][12][13][14][15][16][17][18][19][20][21]. Single diode is preferred because of its simplicity and accuracy.…”

Section: State Of Artmentioning

confidence: 99%

“…Parameters are determined with the help of some assumptions made by the researchers [15][16][17][18][19] (6) Define k = I sc /I o and substitute Equation (6) in (5), we get…”

Section: Mathematical Modellingmentioning

confidence: 99%

“…More than 120 research papers are significantly reviewed and classified in four categories. The first category [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] covers the PV modelling and PV array designing. The second category is based on MPPT methods and their detailed study while third and fourth categories are based on converter [74][75][76][77][78][79][80][81][82][83][84][85][86][87][88][89][90][91] and inverter topologies [92][93][94][95][96][97][98][99][100][101][102][103][104][105][106][107]…”

Section: Introductionmentioning

confidence: 99%

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A Comprehensive Review on Grid-TiedSolar Photovoltaic System

Kumar

Gupta

2017

JGE

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Energy generation is facing a big challenge for meeting the load demand during peak hours. Power utilities are heavily depending on fossil fuels due to limited resources of non renewable energy generation. Therefore researchers and scientists are looking towards some distributed generators (DGs) to supply extra power during peak hours of energy curve. Solar power gives them an extra sniff to meet the load demand in that period. As a consequence grid-tied solar Photovoltaic (PV) system catches the eyes of researchers and industrialist mainly for reducing the burden of fossil fuel energy generation. Single stage or two stages PV systems are applicable for grid interconnection with or without battery backup. Double stage system is generally suggested for practical applications as it holds a benefit of power quality improvement. This article presents a comprehensive review on grid-tied solar PV system. The complete architecture of the grid-tied PV system includes the construction of PV array, MPPT methods, DC-DC converters, Inverters and control algorithms. Different control techniques and topologies with their merits and demerits for grid-tied systems are thoroughly reviewed. The comparisons of different conventional and advanced control techniques justify the practicability of this architecture. Different topologies and control methods of grid-tied PV system are studied thoroughly to justify the potential of grid-tied PV system.

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“…Many previous efforts have simplified the question of shade's impact on performance, either by restricting the shade geometry to that of regular inter-row self-shading [24,25], simplifying the module I-V curve description [26,27], or applying an empirical 'shade factor' to the area of shade extent [19,28]. Other recent works [29,30] have derived simplified mathematical expressions for calculation of the maximum power points of partially shaded PV systems, with limited validation under a tightly controlled set of test cases.…”

Section: Introductionmentioning

confidence: 99%

Measured and estimated performance of a fleet of shaded photovoltaic systems with string and module‐level inverters

MacAlpine

Deline

Dobos

2017

Progress in Photovoltaics

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Shade obstructions can significantly impact the performance of photovoltaic (PV) systems. Although there are many models for partially shaded PV arrays, there is a lack of information available regarding their accuracy and uncertainty when compared with actual field performance. This work assesses the recorded performance of 46 residential PV systems, equipped with either string-level or module-level inverters, under a variety of shading conditions. We compare their energy production data to annual PV performance predictions, with a focus on the practical models developed here for National Renewable Energy Laboratory's SYSTEM ADVISOR MODEL software. This includes assessment of shade extent on each PV system by using traditional onsite surveys and newer 3D obstruction modelling. The electrical impact of shade is modelled by either a nonlinear performance model or assumption of linear impact with shade extent, depending on the inverter type. When applied to the fleet of residential PV systems, performance is predicted with median annual bias errors of 2.5% or less, for systems with up to 20% estimated shading loss. The partial shade models are not found to add appreciable uncertainty to annual predictions of energy production for this fleet of systems but do introduce a monthly root-mean-square error of approximately 4%-9% due to seasonal effects. Use of a detailed 3D model results in similar or improved accuracy over site survey methods, indicating that, with proper description of shade obstructions, modelling of partially shaded PV arrays can be done completely remotely, potentially saving time and cost. Published 2017. This article is a U.S. Government work and is in the public domain in the USA.

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Partial Shading Analysis of Multistring PV Arrays and Derivation of Simplified MPP Expressions

Cited by 50 publications

References 27 publications

Modeling of photovoltaic system for uniform and non-uniform irradiance: A critical review

Modeling of photovoltaic system for uniform and non-uniform irradiance: A critical review

A Comprehensive Review on Grid-TiedSolar Photovoltaic System

Measured and estimated performance of a fleet of shaded photovoltaic systems with string and module‐level inverters

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