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Multilevel Inverter (MLI) has been recognized as an attractive topology for high voltage DC-AC conversion. Function of a multilevel inverter is to synthesize a desired voltage wave shape from several levels of DC voltages. But the main drawback of MLI is its output voltage amplitude is limited to DC sources voltage summation. To overcome this limitation, a Z-source five-level neutral point clamped inverter has been proposed in this work. In the proposed topology output voltage amplitude can be boosted with Z network shoot-through state control. It employs Z network between the DC source and inverter circuitry to achieve boost operation. The output voltage of proposed inverter can be controlled using modulation index and shoot through state. This research work focuses on multicarrier pulse width modulation (MCPWM) strategy for the single phase five level Z-source neutral point clamped inverter. Performance parameters of five-level Z - source neutral point clamped inverter have been analyzed. A simulation model of five level Z-source neutral point clamped inverter developed using MATLAB/SIMULINK 7.13 and its performance has been analyzed.

A Comparison Of Multi Carrier Pwm Techniques Using Z-Source Five Level Diode Point Clamped Inverter