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Improved design of sliding-mode controller based on the incremental conductance MPPT algorithm for PV applications

Solar Photovoltaic system plays an important role in power generation system. The output power produced in the photovoltaic modules relies on upon solar radiation and temperature of the solar cells. In this paper an utilization of sliding mode control technique is connected to track maximum power of photovoltaic cells. This usage depends on grid connected dc to dc switching converter. This is typically connected between the PV modules and the inverter. In this control framework, it is important to measure the PV array output power and to change the duty cycle of the DC/DC converter control signal. This PV converter is controlled by enhanced designing technique of sliding mode controller which drives the PV voltage with reference of an external MPPT algorithm. To test the robustness of this control, we compared the results obtained from the Perturb and Observe (P&O) technique with the proposed incremental conductance (InC) method. Obtained results show an improved performance of InC algorithm with sliding mode control strategy under various parameter conditions.