A Framework to Control Inter-Area Oscillations with Local Measurement

TL;DR

This paper proposes a framework for synthesizing remote signals from local measurements to enhance power system stability and damping of inter-area oscillations, reducing reliance on wide-area communication networks.

Contribution

It introduces a novel observer-based framework for local measurement-based feedback to control inter-area oscillations, improving stability and cybersecurity resilience.

Findings

Enhanced damping of inter-area oscillations

Effective remote signal synthesis using observer variants

Potential for attack-resilient smart grid control

Abstract

Inter-area oscillations in power system limit of power transfer capability though tie-lines. For stable operation, wide-area power system stabilizers are deployed to provide sufficient damping. However, as the feedback is through a communication network, it brings challenges such as additional communication layer and cybersecurity issues. To address this, a framework for synthesizing remote signal from local measurement as feedback in the wide-area power system stabilizer is proposed. The remote signal is synthesized using different variants of observers in a case study of two-area benchmark system. The proposed framework can improve the damping of inter-area oscillations for static output feedback controller. The presented framework should help to design attack-resilient controller design in smart grid.