Modified Single-Phase Single-Stage Grid-tied Flying Inductor Inverter with MPPT and Suppressed Leakage Current

Modified Single-Phase Single-Stage Grid-tied Flying Inductor Inverter with MPPT and Suppressed Leakage Current

Abstract:

In this paper, an improved transformer-less single-phase single-stage grid-tied flying inductor inverter is presented. The negative terminal of the PV panel is grounded in the proposed topology, which increases reliability and suppresses the leakage current. The proposed topology has buck-boost capability without increasing the number of required components and has considerably high efficiency. An improved control algorithm for proper operation of the proposed topology has been investigated. Moreover, a modified P&O MPPT algorithm suitable for the proposed converter is presented. Furthermore, design of the converter components based on maximum power which the proposed converter can inject is done. Simulation of the proposed converter is done in Matlab Simulink in order to verify the designed values and experimental prototype is developed in the same situation as the Simulink and design procedure to reconfirm the results of Simulink and design results. Finally, a comparison study has been investigated for better clarification of the advantages and disadvantages of the proposed converter.

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