Title: Performance analysis of nine level SL quasi multi level inverter for different loads
Authors: S. Priyadharsini; T.S. Sivakumaran
Department of EEE, Anna University, Chennai, Tamil Nadu, India
Sasurie Academy of Engineering, Kariyampalayam (PO), Coimbatore-641653 Tamil Nadu, India
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.
Keywords: dual PV source; SL quasi MLI; low THD; SPWM modulation; motor drives.
Int. J. of Materials and Product Technology, 2017 Vol.55, No.1/2/3, pp.2 - 16
Submission date: 15 May 2016
Date of acceptance: 25 Nov 2016
Available online: 16 Jun 2017