Control scheme of cascaded H-bridge Statcom in three-phase power systems. Cascaded H-bridge Statcom has merits in point of switching losses, output harmonics, and the number of circuit components. But every H-bridge cell has isolated dc capacitors. So the balancing problem of capacitor voltages exists. Since Statcom is often requested to operate under asymmetrical condition by power system faults such as one line grounding or two-line short circuit...