Design and Implementation of Five Level Inverter based MPPT Using Self Lift SEPIC Converter

Abstract

The conventional power conditioning units require a DC-DC converter followed by an inverter circuit to deliver the required power to the load. This increases the required power conversion stages, system cost, size and reduces the overall system efficiency. Therefore, to maximize the efficiency of the renewable energy system, it is necessary to track the maximum power point of the input source. This paper presents the modeling and simulation of incremental conductance (IncCond) Maximum Power Point Tracking (MPPT) using Multi level Single Ended Primary Inductance Converter (SEPIC) converter and compared its performance with self lift SEPIC converter. The solar panel model is developed using the basic circuit equations of photovoltaic cell. The MPP of a solar panel varies with irradiation and temperature. The IncCond algorithm is used to track the maximum power from the solar panel. The unregulated voltage from the panel will be regulated by using the Multi level SEPIC at the same time it can also supply the medium voltage and high voltage loads. The efficiency of the Multi level SEPIC converter over the self lift SEPIC converter has been tested by using Matlab/Simulink.