This book deals with the design and implementation of a multilevel voltage source converter based static synchronous compensator (STATCOM) employing sinusoidal pulse width (SPW) modulation control techniques. The main objective of this book is to maintain voltage stability in the power system using Multilevel Inverter based STATCOM. Hence, a new symmetrical modular multilevel STATCOM is employed to reduce voltage fluctuations like sag and swell conditions and also to isolate current and voltage harmonics in the transmission system. The multilevel STATCOM is used at the point of common coupling (PCC).