Detection of LFO and Evaluation of Damping Improvement Using Synchrophasor Measurement

Synchrophasor has evolved as an effective tool for detection of low frequency oscillation (LFO) inherent to a power system. This paper presents case studies to illustrate utilization of Synchrophasors for post-mortem analysis of oscillations to identify the root cause and evaluate the effectiveness of the remedial measures like Power System Stabilizer (PSS) and System Protection Schemes (SPS) for improving damping in the system. Authors suggest installation of Phasor Measurement Unit (PMU) at suitable locations for performance evaluation of other controllers installed in the system for power oscillation damping (POD).