An Efficient Modified CUK Converter with Fuzzy based Maximum Power Point Tracking Controller for PV System


To improve the work of photovoltaic system a modified cuk converter with Maximum Power Point Tracker (MPPT) that uses a fuzzy logic control algorithm is given in this research work. In the planned cuk converter, the conduction losses and switching losses are decreased by means of replacing the passive elements with switched capacitors.


These switched capacitors are used to provide smooth transition of voltage and current. So, the conversion ability of the converter is improved and the ability of the PV system is raised. The PV systems use a MPPT to continuously extract the highest possible power and deliver it to the load.


MPPT consists of a dc-dc converter used to find and maintain operation at the maximum power point using a tracking algorithm. The simulated results indicate that a large amount of additional power can be obtain from photovoltaic module using a planned converter with fuzzy logic controller based MPPT


 modified Cuk Converter

Photovoltaic System

Maximum Power Point Tracker

Fuzzy Logic Controller




Figure 1: Simulation diagram for the proposed converter








Figure 2: Output of Solar Irradiation at 500 watts / m2 (a)

Current, (b) Voltage, (c) Power







Figure 3: Output of Solar Irradiation at 1000 watts / m2 (a)

Current, (b) Voltage, (c) Power


The planned modified cuk converter was simulated in MATLAB simulation platform and the output work was decide. Then, the mode of operation of planned converter was consider by the different solar irradiation level. From that, output current, voltage and power were considered. For evaluating the output work, the planned modified cuk converter output was tested with PV system.


From the testing results, the output power of the modified converter ability and the ability deviation were resolve. The analyses showed that the planned modified cuk converter was better when compared to conventional cuk converter and boost converter. Experimental setup has been done to prove the strength of the planned system.


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