Synchrophasor-based Tool for Computing Performance Indicators of Frequency Stability
Jaime D. Pinzón · 2024
Frequency control is one of the main objectives in the operation of the national interconnected system and when generation disconnection events, contingencies in electrical network equipment or disconnection of large blocks of load occur, the frequency can deviate up to action thresholds of protections or risk of cascade tripping of power system equipment. To analyze and characterize frequency stability, this paper presents a methodology for the assessment of frequency stability with performance indicators calculated from synchronized phasor measurements. The calculated indicators are the nadir frequency, rate of change of frequency (RoCoF) and frequency establishment time. The methodology is implemented in the analysis of frequency events of the Colombian interconnected system using time series data of synchrophasor measurements. The results showed the capacity of the proposed methodology and tool to characterize frequency events and the relationships between the different indicators calculated for each of the events.