A SITO DC DC converter hybrid cascaded multilevel inverter topology for stand alone PV applications [articol]

Abstract

The Photovoltaic (PV) is an unavoidable segment in renewable energy based power generation system. The two stage power conversion is a best pay tribute to stone alone such as EV charging station or grid-connected PV power system Nevertheless, the power converters design and control integration must be prized in order to achieve the efficiency and reliability. In this paper, a new single input triple output non-isolated DC-DC boost converter (SITO DC-DC converter) and a 15 level reduced switch hybrid H-bridge multi-level inverter (MLI) are designed for a stand-alone PV system which is most suitable to both domestic and industrial applications. To interface the DC - DC converter and DC-AC converter, a new hybrid pulse width modulation technique (PWM) is proposed which reduces the total harmonic distortion (THD) of the output voltage and mainly SITO converter reduces the voltage balancing problem in MLI while converting DC to AC. The proposed system is simulated using MATLAB/Simulink system software and laboratory scale setup is build and implemented by using SPARTAN 3 DSP controller. The simulation and experimental results are confirmed proposed converters reward.