Journal of Electrical Engineering : Volume 18 / 2018 - Edition : 3

A Self Balancing Space Vector PWM for Z Source T Multilevel Inverter

R.Shiva kumar
power electronics
This paper offerings a new Z Source -T shape - Neurtal point Diode Clamped (NPC) - Multi Level Inverter (MLI) power conversion system (Z-T-NPC-MLI) with the aid of New Space Vector PWM (SVPWM) scheme. The proposed impedance source inverter associations the advantages of boosting and conversion of DC to AC power. There are numerous research papers on T-NPC-MLI producing the desired voltage conversion and with minimal switching and conduction losses. Nevertheless, the reported research on Z-NPC-MLI SVPWM has dealt with reduction of Shoot through (ST) options and its majority enhancement, it does not address the neutral point fluctuation problems on the DC-Link. This paper offers an improved SVPWM scheme for Z-T-NPC-MLI with minimal ST state. The scheme exploits the redundancy switching vector option for both ST and regular switching, which offers a self-control neutral point fluctuation. Also, the proposed SVPWM keeps the quarter symmetry and harmonic spectra. The deliberate Z-T-NPC-MLI with proposed SVPWM is simulated in MATLAB/SIMULINK environment, and the results confirm the advantages of the proposed inverter and its simplified PWM scheme.
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