STABLE OPERATION OF A SINGLE - PHASE CASCADED H-BRIDGE MULTILEVEL CONVERTER

The proposed paper presents the steady state power balance in the cells of a single-phase two cell cascaded H-Bridge converter. Multilevel cascaded H-Bridge (CHB) converters fonds a good solution for high-power applications. The power balance can be achieved by supplying the active power from the grid or to deliver active power to the grid in each cell. This can be analyzed by maintaining the DC-link voltages and the desired AC output voltage value. To have a stable operation it is necessary to supply the active power to 2C-CHB between maximum and minimum limits. The circuit for 2C-CHB synchronous rectifier is designed in MATLAB and the results are obtained successfully.