Abstract
In recent years, power electronic converters are widely used in the industrial as well as domestic applications for the control of power flow. The topologies of multilevel inverter have several advantages such as high output voltage, lower THD and reduction of voltage ratings of the power semiconductor switching devices. The objective of the work is to design multilevel inverters for PV applications integrated in distribution grids so as to reduce THD and to improve the power quality. The proposed control strategy ensures an implementation of SHE modulation for a 5 to 11 levels. This technique is a method to get rid of harmonics by judicious selection of the firing angles of the inverter and eliminates the need of the expensive low pass filters in the system. This article deals with the reduction of harmonics for multilevel converter sources converter for equal and for unequal DC voltages cases.
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