Patent ID: 8004252
Filing Date: 2011-08-23
Classification: H02J

Abstract:
1. A power system stabilizer, the stabilizer comprising: a sensor configured for sensing a signal representative of electro-mechanical oscillations of a power system; a controller configured for using the sensed signal for generating control signals for damping the electro-mechanical oscillations; and a damper comprising a damping converter and a resistor coupled to the damping converter, the damping converter being coupled to the power system through a power bus, the damping converter configured for using the control signals for damping the electro-mechanical oscillations, wherein the control signals provide dynamic stability and transient stability of the power system by damping the electro-mechanical oscillations, wherein the damping converter comprises at least two insulated gate bipolar transistor (IGBT) modules, and wherein the controller is configured for selectively switching IGBTs of the at least two IGBT modules simultaneously or sequentially.