DESIGN OF ROBUST CONTROLLER FOR STATCOM APPLIED TO LARGE INDUCTION MOTOR USING GRAPHICAL LOOP SHAPING METHOD

Abstract

Between the different robust H-Infinity methods to design the controller for FACTS, loop shaping is known to be one of the effective and feasible methods. This research presents an investigation on H-Infinity loop shaping procedure via Graphical Loop Shaping (GLS) for STATCOM installed at terminals of a large induction motor. The dynamic behavior of induction motor is analyzed while the uncertainty of system parameters and STATCOM parameters are considered and will be compared with conventional PI controller.
Simulation results prove that GLS method has better dynamic response and more robust than PI controller against variation of system parameters and STATCOM
Parameters, so in a specified operating point, even the system goes to instability.