Abstract
Photovoltaic (PV) arrays can be connected following regular or irregular connection patterns to form regular configurations (e.g., series-parallel, total cross-tied, bridge-linked, etc.) or irregular configurations, respectively. Several reported works propose models for a single configuration; hence, making the evaluation of arrays with different configuration is a considerable time-consuming task. Moreover, if the PV array adopts an irregular configuration, the classical models cannot be used for its analysis. This paper proposes a modeling procedure for PV arrays connected in any configuration and operating under uniform or partial shading conditions. The procedure divides the array into smaller arrays, named sub-arrays, which can be independently solved. The modeling procedure selects the mesh current solution or the node voltage solution depending on the topology of each sub-array. Therefore, the proposed approach analyzes the PV array using the least number of nonlinear equations. The proposed solution is validated through simulation and experimental results, which demonstrate the proposed model capacity to reproduce the electrical behavior of PV arrays connected in any configuration.
Highlights
Photovoltaic (PV) systems are considered one of the most important renewable energy sources; since the sunlight is almost everywhere, it is free, and the energy production does not generate greenhouse gases
The partial shading profile for both configurations is defined by the M I ph matrix, as shown in Equation (16), while the matrices M Isat, Mβ, MRs, MRh, M Isatby, and Mβby are defined as 10 × 5 matrices with the parameters of Table 3
This paper introduced a modeling procedure to reproduce the electrical behavior of a PV array connected in any configuration for a given array voltage
Summary
Photovoltaic (PV) systems are considered one of the most important renewable energy sources; since the sunlight is almost everywhere, it is free, and the energy production does not generate greenhouse gases. According to the International Energy Agency, in 2016 a total of 75 GW from PV systems were installed around the world, 50% more compared to 2015. In this way, the installed global PV capacity reached 300 GW [1], approximately. The installed global PV capacity reached 300 GW [1], approximately These facts justify the growing interest in researching PV systems, in modeling techniques to analyze their electrical behavior and viability evaluation. Modeling techniques are a useful tool for power prediction analysis, the evaluation of maximum power point tracking (MPPT) strategies, and the validation of reconfiguration algorithms, among
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