WAMS Based Damping Control of Inter-area Oscillations Employing Energy Storage System

Abstract

This paper presents a systematic design procedure for a wide-area damping controller (WADC) employing Energy Storage Systems (ESSs). The WADC is aimed at enhancing the damping of multiple inter-area modes in a large scale power system. Firstly, geometric measures of controllability and obsevability are used to select the control locations for ESSs and most effective stabilizing signals, respectively. Then, the WADC coordinates these signals to achieve multiple-input-multiple-output (MIMO) controllers with the least Frobenius norm feedback gain matrix. The simulation results of frequency and time domains verify the effectiveness of the wide-area damping controller for various operating conditions. Furthermore, the robustness of the wide-area damping controller is also tested with respect to time delay and uncertainty of models.

Keywords

• damping
• energy storage
• phasor measurement units
• power system stability
• robustness