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Analysis of Cascaded Multilevel Inverter with Other New Topologies

M. V. Kurwale, V. R. Doifode, P. J. Dumkondwar

Abstract


Multilevel inverters have been important devices developed in recent years, showing to their capability to increase the voltage and power delivered to the load. Researches done based on basic inverter topologies shows that, Multilevel inverters have been widely used in medium and high-voltage applications as they have many advantages such as low power dissipation on power switches, low harmonic and low electromagnetic interference (EMI) outputs. For getting the improvement in inverter performance and quality of output, the different methods has been implemented such as, use of various switching strategies, use of  Low Pass Filter to eliminate higher order harmonics ,use of  Multilevel Structure in order to reduce harmonics and THD. The Selective harmonic elimination method for the staircase voltage waveform generated by multilevel inverter has been studied extensively in the last decade. The selective harmonic elimination method for 3-Pahase 7-Level Multilevel inverter using simple PWM Technique is proposed in this paper. MATLAB Simulink environment is used to simulate the results.

 

Keywords: PWM – Pulse width modulation, FACTS-flexible AC transmission system, MLI- multilevel inverter, CHB-cascaded H-bridge, NPC- neutral point clamped, FC- flying capacitors


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References


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