Minimizing the Dc-link Capacitance of a Two-stage Pv-inverter by Predictive Current Control – Increasing Reliability and Reducing Cost by Means of Control
نویسنده
چکیده
The goal of this work is to reduce the DC-link capacitance of a two-stage single-phase inverter so much that the use of film capacitors becomes feasible in both, price and volume. Film capacitors instead of electrolytic capacitors could increase lifetime and reliability of the inverter, especially in high-temperature applications like module-integrated micro-inverters. For the capacitance reduction we use predictive current control for the DC/DC and the DC/AC stage. This type of control is able to suppress a large voltage ripple at the DC-link, allowing a reduction of the installed capacitance without deteriorating the input and output current waveforms.
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