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Simulation and Analysis of Complementary Switching Multilevel Inverter using Wave Shifting Multi Carrier Modulation
Abstract
In the present existing power scenario to meet out the
demand, multi-level inverter technology has emerged recently as a very important alternative in the area of high-power medium-voltage applications. This paper presents a complementary switching multi-level inverter using wave shift modulation control technique which combines both the level shift and phase shift modulation
techniques. A 31 level inverter is designed to increase the quality of the output waveform to sinusoidal. This complementary switching reduces the number of switches thus reducing losses and total harmonic distortion (THD) in comparison with conventional multi-carrier based pulse width modulation (PWM) schemes, phase-shift (PSHM) and level-shift (LSHM) modulations. To analyze
the performance of proposed technique, a 31 Level cascaded
multi-level inverter is designed and simulated. In this new topology half H-bridge multilevel inverter with binary logic is used to achieve 2n levels per leg. THD and efficiency of the proposed technique is analyzed for 2kw MLI. The proposed concept is verified by using Mat Lab/Simulink.
Keywords
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