A New Nested Neutral Point Clamped (NNPC) Converter for Medium-Voltage (MV) Power Conversion

In this paper, a new Voltage Source Converter (VSC) for Medium Voltage (MV) applications is presented which can operate over a wide range of voltages (2.4kV-7.2KV) without the need for connecting power semiconductor in series. The operation of the proposed converter is studied and analysed. In order to control the proposed converter, a Space Vector Modulation (SVM) strategy which benefits from the switching state redundancy has been used. This strategy helps to control the output voltage and stabilize voltages of the flying capacitors in the proposed converter. Performance of the converter under different operating conditions is investigated in the MATLAB/Simulink environment.