Özet:

This paper brought out the interest of eliminating a dc-dc converter stage in a two stage power conversion system to reduce the complxity, size and cost. The problem of the paper is formulated from the observations made by the existing literature, which have very less scope about the elimination of dc-dc converter stage in power conversion system.It is proposed and evaluated by implementing the combinations of the proportional Integral and sliding mode controllers to evaluate the grid side parameters such as grid voltage and current, real power,reactive power, power factor and dc link voltage settling time for standard atmospheric condition and changing atmospheric condition. Existing inverter topologies have the drawbacks in the terms of number of levels to rediuce the harmonics and dc link voltage maintenace for the disturbances caused at grid side and source side. The proposed system is analysed by implementing a three phase seven level diode clamped multilevel inverter. A multiloop controller is designed as the inner loop controls the power factor and the outerloop track the maximum power from photovoltaic syatem. This paper finally arrives at a conclusion about the stastical and simulated results of the proposed system by using MATLAB/SIMULINK.

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