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Performance analysis of nine level SL quasi multi level inverter for different loads
by S. Priyadharsini; T.S. Sivakumaran
International Journal of Materials and Product Technology (IJMPT), Vol. 55, No. 1/2/3, 2017

 

Abstract: This paper presents a design of dual cascaded SL quasi multilevel inverter that can be used with either a two isolated PV sources. This research work gives an outline of medium voltage multilevel inverter with a focus on achieving low harmonic distortion and high efficiency at low switching frequency operation. If another trusty feature of said H-bridge fails, it can be bypassed and the configuration can still operate as a five level inverter at its full power rating. This feature improves the trustworthiness of the path of the circuit and hence the switching device can be prevented from thermal runway and current hogging is prevented. The said modulations can be easily extended to three phase and higher multi level inverters, with same physical structure of the power module. The proposed controller is ultimately compared with other reported vector-based methods and its advantages are illustrated. The system is integrated and simulated on MATLAB. To verify the performance of the inverter, a prototype was constructed. The simulation and experimental results reveal that the inverter has high step-up inversion ability.

Online publication date: Fri, 16-Jun-2017

 

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