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Abstract
This study presents the simulation analysis of a PV based single-phase modified H-bridge eleven-level inverter. Multilevel inverters offer high power capability, associated with lower output harmonics and lower turn-off losses. This study informs a PV based multilevel inverter using a H-bridge output stage with four bidirectional auxiliary switches. The inverter is capable of producing eleven levels of output-voltage levels (+V dc/5, +2V dc/5, +3Vdc/5, +4V dc/5, +V dc, '0' level, -Vdc/5, -2Vdc/5, -3Vdc/5, -4Vdc/5 and -Vdc) from the DC supply. Theoretical predictions of the proposed PV based single-phase modified H-bridge eleven-level inverter with MPPT are validated using simulation in MATLAB SIMULINK.
Highlights
Due to the need, constant increase of costs of fossil fuels and its huge negative impact on the environment, renewable energy sources have recommended and developed, in recent years
In Photovoltaic (PV) systems, solar energy is converted into electrical energy by PV arrays
PV array with Maximum Power Point Tracker (MPPT): PV array: A solar PV system is powered by many crystalline or thin film PV modules
Summary
Constant increase of costs of fossil fuels and its huge negative impact on the environment, renewable energy sources have recommended and developed, in recent years. It is estimated that the electrical energy generation from renewable sources is increased from 19%, in 2010, to 32%, in 2030, because of innovation in power electronics techniques and control strategies (European Commission, 2010). In Photovoltaic (PV) systems, solar energy is converted into electrical energy by PV arrays. Photovoltaic systems require interfacing power converters like dc-dc converter and dc-ac inverter between the PV arrays and the grid. A single-phase grid-connected inverter is usually used for residential or low-power applications of power ranges that are less than 10 kW (Calais and Agelidis, 1998). Types of single-phase grid-connected inverters have been investigated (Kjaer et al, 2005). The dc-dc boost converter was required because the PV arrays had a voltage that was lower than the grid voltage. The inverter used in the power stage offers a significant enhancement in terms of lower component count and condensed design complexity when compared with the other existing eleven-level inverters
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