Real-Time Identification of Power System Oscillation Sources Using DEF Method with WAMS Data: A Case Study in Thailand

The increasing penetration of renewable energy sources has intensified low-frequency oscillation challenges in modern power systems due to reduced system inertia and higher variability. Accurate and timely identification of oscillation sources is therefore essential for maintaining system stability. This paper presents a real-time oscillation source identification method based on Dissipating Energy Flow (DEF) analysis using Wide Area Monitoring System