Electrolitic capacitors of dc-bus link normally present the lowest mean time between failures among other electronic components of photovoltaic (PV) inverters. This manuscript proposes to increase inverter reliability using a dual-stage PV inverter system with small dc-bus link film capacitors, where a high-gain high-frequency isolated step-up dc-dc converter processes the energy from PV arrays. This converter topology in combination with a digital resonant control strategy for elimination of the low-frequency power ripple in PV array makes possible reducing dc-bus link capacitance without reduction of power extracted from PV system. The proposed control system is explained in detail, including experimental validation. † Lower reduction of efficiency at high temperatures of operation [30, 31]. † Lower redution of energy generation under partial shading compared with crystalline modules [32]. † Lower losses in cables, diodes, and step-up converter for parallel arrays due to higher maximum power point (MPP) voltage [33].

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This paper presents a simplified mathematical model to estimate the energy produced by photovoltaic systems considering irradiance over the module surface, module temperature, and the wind speed of photovoltaic modules. This analysis is compared with the more usual analysis of energy production of a photovoltaic system using the monthly average irradiation data. Simulation results are presented to compare and validate the proposed analysis.

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