Output-feedback IDA control design via structural properties: Application to Thyristor Controlled Series Capacitors

In this paper the properties exhibited by the IDA Passivity-based Controller (PBC) design methodology for developing Output-Feedback Controllers (OFC) are illustrated by means of the particular system composed by a synchronous generator connected to an infinite bus via a Thyristor Controlled Series Capacitors (TCSC). Two OFC are presented, one that does not involve the unmeasurable state and other that, although including this state, present some Input-to-State Stability (ISS) properties that allow for establishing a sort of separation principle concerning an observer-based structure for the closed-loop system.