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This paper deals with the modeling of a single-phase PV inverter using current control. Two control methods are described; the hysteresis band and the zero-tolerance control. A study for the optimization of the Total Harmonic Distortion (THD) of the output current and for the minimization of the switching losses is being conducted. A new modulation method is also presented, defined as mixed modulation,...
This paper presents a cascaded H-bridge multilevel inverter that can be implemented using symmetrical topology. A multilevel inverter is a power electronic device built to synthesize a desired AC voltage from several levels of DC voltages. Multi level inverters have been an important development in recent years. Owning the capability to increase the power quality delivered to the load for high performance...
In this paper, a current-control strategy is proposed for voltage-source inverters in microgrids. The main objective of the proposed controller is to inject a clean sinusoidal current to the grid, even in the presence of nonlinear/unbalanced loads and/or grid-voltage distortions. The repetitive control technique is adopted because it can deal with a very large number of harmonics simultaneously. The...
Grid connected solar inverters are used to feed energy generated by a photovoltaic generator into the mains. High efficiency is a major requirement. Furthermore a low total harmonic distortion (THD) of the output current is needed to comply with regulations. This paper presents the control for a new highly efficient inverter topology. Due to disturbances of the grid voltage and non-linear effects...
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