A Robust Design of a Static VAR Compensator Controller for Power System Stability Improvement

摘要

A novel robust damping controller for a static var compensator (SVC) in a power system has been designed using a simple graphical technique. The graphical loop-shaping method starts by selection of a nominal plant function satisfying the robust stability and performance criterion. The variations in operating conditions from the nominal values are modeled as multiplicative structured uncertainty. The robust controller designed was tested for a number of operating conditions and disturbances. It is observed that the robust controller provides extremely good damping for a good range of operating points. The advantage of the proposed controller is that the design is based on a simple graphical method avoiding complex mathematical computations normally encountered in such designs.