Influence of double-line frequency power oscillation in photovoltaic generator efficiency and H-bridge VSI performance

摘要

In this work it is presented a theoretical and experimental investigation of the influence of the low power oscillation due to the pulsating single-phase energy flow in a H-bridge voltage source inverter that operates connected to the grid and is fed by photovoltaic (PV) panels. That oscillation can be responsible for efficiency reduction of PV generators connected to the DC-bus of the inverter, as well as degrades its AC output voltage quality. Experimental results are provided to validate the theoretical approach and to evaluate the performance and quantify energy gain by proposing a method to improve the amount of energy extracted from a PV generator even with low frequency oscillation.