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A Thirteen Level Inverter Design Based on Hybrid MLI Topology for Minimum THD

S.Lakshmipriya, R.K.Raghav, Dr.M.Muruganandam

To minimize the power demand and scarcity we have to improve the power extracting methods. Multilevel inverter is used to extract power from solar cells, fuel cells and batteries. It synthesizes the desired ac output waveform from several dc sources. This paper presents a three phase hybrid multilevel inverter topology that uses thirteen level transistor clamped H-Bridge with minimum total harmonic distortion. To achieve a better voltage utilisation and harmonics reduction, Multicarrier Phase Shift Pulse Width Modulation control technology is used. The analysis of output voltage harmonics and the total power losses converging the switching power losses are carried out and compared with the cascaded neutral point clamped and conventional H-Bridge inverters. A new method to balance the system voltage in each source is developed and tested. For the verifications it is tested on three phase application systems. From the results, the proposed inverter provides higher output quality with relatively less harmonics losses and THD as compared to the other conventional inverters.