Advanced HVDC link control for damping power system oscillations

Abstract

This paper presents a new approach to the design of an integrated AC/DC system using variable structure systems theory based on the concepts of sliding mode control. The sliding mode control constrains the system motion to a state trajectory and provides greater robustness and insensitivity to plant parameter variations and is practically realisable. The paper highlights the designs of DC link current regulator and gamma modulation controllers for fast transient stability of an AC/DC system.