Wide-Area Measurement-Based Stabilizing Control of Power System Considering Signal Transmission Delay

TLDR

Recent advances in wide‑area measurement systems enable centralized control using remote signals for multi‑mode swing damping, but unavoidable transmission delays affect signal arrival at the controller. The study aims to design a damping controller that accounts for these delays to maintain satisfactory performance. A predictor‑based H∞ control strategy is employed to design a WAMS‑based damping controller for a prototype power system using a static var compensator. The controller’s performance is evaluated over a range of operating conditions.

Abstract

Recent technological advances in the area of wide-area measurement systems (WAMS) has enabled the use of a combination of measured signals from remote locations for centralized control purpose. The transmitted signals can be used for multiple swing mode damping using a single controller. However, there is an unavoidable delay involved before these signals are received at the controller site. To ensure satisfactory performance, this delay needs to be taken into account in the control design stage. This paper focuses on damping control design taking into account a delayed arrival of feedback signals. A predictor-based H/sub /spl infin// control design strategy is discussed for such time-delayed systems. The concept is utilized to design a WAMS-based damping controller for a prototype power system using a static var compensator. The controller performance is evaluated for a range of operating conditions.