Implementation of PV Fed Hybrid Multilevel Inverter using MPPT Based Induction Motor Drive for Industrial Pump Application
نویسنده
چکیده
This paper shows that versatile stand-alone photovoltaic (PV) systems still demand on at least one battery inverter with improved characteristics of robustness and efficiency, which can be achieved using multilevel topologies. A compilation of the most common topologies of multilevel converters is presented, and it shows which ones are best suitable among the NPC/ Cascaded H-Bridge to implement inverters for standalone applications in the range of a few kilowatts. The harmonics content of the output signals of the both the inverters are analyzed. Two types of harmonics are investigated for induction motors: space harmonics and time harmonics. Space harmonics are generated due to the different phase windings interaction when the power supply is sinusoidal and they can be reduced by applying a proper machine design. Finally a level shifted carrier based pulse width modulation technique is used for MLI. The performance of proposed MLI and cascaded H-Bridge MLI for induction motor drive application is presented. Matlab/Simulink model is developed and simulation results are explained in detail.
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