Modeling and testing of two-stage grid-connected photovoltaic micro-inverters

C.L. Trujillo, F. Santamaría and E.E. Gaona

Renewable Energy, 2016, vol. 99, issue C, 533-542

Abstract: In this paper, the characteristics, design and control parameters of a 200 W micro-inverter, consisting of two conversion stages are presented; the first one is implemented by a push-pull converter, which provides galvanic insulation and adjusts the DC voltage from the photovoltaic panel to an appropriate voltage with the implementation of a current injected control. The second stage corresponds to a full bridge inverter SPWM with an average current control, which injects energy from the push-pull converter to the grid; it is synchronized with the grid and delivers the maximum power provided by the photovoltaic panel. Power is extracted through the Maximum Power Point Tracking Technique (MPPT). The micro-inverter is simulated and its behavior to irradiance variations is observed. Finally, the transient and stable responses of the implemented micro-inverter are presented. Stable and slightly underdamped output signals (voltage and current) are obtained under current panel variations.

Keywords: Control; DC-DC converter; Inverter; Modeling; Photovoltaic systems (search for similar items in EconPapers)
Date: 2016
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (6)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:99:y:2016:i:c:p:533-542

DOI: 10.1016/j.renene.2016.07.011

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