| An advanced static var compensator or STATCOM is a reactive power source applied for the dynamic compensation in power systems to provide voltage support, increase transient stability margin and improve damping of power systems. The thesis investigates the possibility of using a cascade M-level inverter consists of (M-1)/2 H-bridges in which each bridge has its own separate dc source as an advanced static compensation or STATCOM, in which the design of the seven level inverters as well as corresponding switching methods, harmonic spectrum and control strategies are carefully developed. The basic operation features of a STATCOM is simulated in a simple ac system.; The merit of the cascade converter configuration over the other two multilevel converter configurations, diode-clamped converter configuration, and flying-capacitor converter configuration, is that the cascading configuration uses a small number of diode and capacitors. (Abstract shortened by UMI.)... |
