M.S Abinaya, L.Priyanga, T. Suresh Padmanabhan, T.Hemanand
This paper presents a simple STATCOM scheme using a cascaded two-level inverter-based multilevel inverter. The proposed topologies have two VSI based two-level inverters are connected in cascade through open-end windings of a three-phase transformer and filter elements. Converter fed dc-link voltages is regulates at different levels to obtain four-level operation. The proposed STATCOM multilevel inverter has operates under MATLAB/SIMULINK environment and the results are verified in balanced and unbalanced conditions. Further, stability behavior of the topology is investigated. The dynamic model is developed and transfer functions are derives under different conditions. The system behaviors are analyzing under various operating conditions.
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