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

Abstract

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.

Numerical Modeling, Simulation and Evaluation of Conventional and Hybrid Photovoltaic Modules Interconnection Configurations under Partial Shading Conditions

“…The assumption of taking fixed temperature for varying incident light intensity is in line with the literature reported studies [26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43]. Adoption of a small 4 ×4 PV array system for simulation investigation is practically feasible according to the studies [44,45] wherein authors detailed both the simulation and practical investigations in this particular contextual analysis. This case study is more comprehensive towards the discussion of PV modules interconnection configurations as compared to the PV array topologies highlighted in the literature to the best of the author's acquaintance.…”

Photovoltaic Partial Shading Performance Evaluation With a DSTATCOM Controller

“…k α is a gain that depends upon the settling time of the step response of GI. In Laplace domain, v s → v s (s) and v α1 → v α1 (s) can be denoted as (3).…”

“…Traditional methods become inefficient in accurately tracking GMPP as well as can be erroneous in tracking any local MPP, which results in a sizable deduction in the production of energy as well as efficiency. New research articles demonstrate the significance of tracking GMPP in case of quickly changing irradiance scenarios [3]- [5]. Hence, the most significance feature of grid-connected photovoltaic system is generating the optimum amount of power in accordance with changing solar radiation.…”

Investigation of Small-Scale Photovoltaic Systems for Optimum Performance under Partial Shading Conditions

“…In research [21], a (4 × 4) system was studied under PS conditions to extract the highest possible power using several different connections. The results were tested and verified through practical experiments.…”

“…In contrast, another team of researchers focuses on the system as a whole and how to deal with the shading of several modules within the system [20,21]. They investigate various systems under the influence of different PS patterns and experience new methods for static and dynamic connection.…”