Journal of Electrical Engineering : Volume 19 / 2018 - Edition : 3

Novel three Phase Quasi Z source Multilevel Inverter Topology for Wind Turbine Driven Permanent Magnet Generator

Authors:
Maheswari K.T
Dr.R.Bharanikumar
Domain:
power electronics
Abstract:
This study presents the utilization of multilevel inverter that has been designed to reduce the circuit complexity and optimizing the use of bidirectional switches. A new three phase Quasi Z source multilevel inverter (QZS-MLI) for low speed wind turbine driven permanent magnet generator has been proposed. The proposed inverter consists of an auxiliary circuit which is made up of QZS network and 5 bidirectional switches along with the full bridge inverter configuration. Since the working of power switches are optimized, it is able to produce 7 levels line to line voltage with only 2 shared power switches among the three phases. The output voltage is similar to the renowned traditional multilevel inverters such as diode clamped, flying capacitors and cascaded H bridge inverters but with less power switches and ease of use. A modified carrier based level shifted pulse width modulation control strategy has also been developed. The performance of the proposed inverter is analyzed through MATLAB/SIMULINK and the results are verified with experimental setup.
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