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Providing capability to keep wind and renewable sources connecting to the grid by Dynamic voltage restores (DVRs) during transient low-voltage and over-voltage conditions is a recommended solution. But, increasing the grid nominal voltage, the power switch stresses increase significantly. Also, the generated voltage by DVRs may contain high total harmonic components. In this regard, this research work aimed to introduce a new structure for step-up switched capacitor converter (SCC) for voltage regulation by DVRs. Among the advantages of the proposed structure, increasing the voltage amplitude, providing more voltage levels and using fewer components compared to the conventional structures can be mentioned. In the proposed structure, a 13 level inverter is presented which has two independent DC voltage source. The capabilities of the suggested 13-level structure, it is used to feed resistive and resistive-inductive loads. The capabilities of the proposed structure are tested in MATLAB/Simulink. The feature of the proposed inverter in a DVR-quipped wind unit is verified through simulations results.

A new multilevel inverter is proposed in this paper, in which the capacitor and transformer are employed to generate the high voltage levels compared to the used elements. In this proposed structure, only one DC source and transformer are used. In the extended structure, only the number of capacitors and switches is increased as a result the costs are reduced and implementation is simplified. In order to evaluate pros and cons of the proposed inverter, first it is compared to the conventional transformer-based structures, and then its performance is evaluated through simulation in MATLAB by considering a 9-level configuration.