Σύγκριση μεθόδων

	Υποσυγχρονικός Συντονισμός	Εκτίμηση Κατάστασης Συστημάτων Ηλεκτρικής Ενέργειας
Πεδίο	Ηλεκτρολογική Μηχανική	Ηλεκτρολογική Μηχανική
Οικογένεια	Process / pipeline	Process / pipeline
Έτος προέλευσης	1977	1970
Δημιουργός	E. William Kimbark, Robert Farmer	Fred Schweppe
Τύπος	Identification and mitigation of subsynchronous oscillations in AC systems	Real-time state estimation using measurements and physical models
Θεμελιώδης πηγή	Farmer, R. G., Natel, B., & Schulz, R. P. (1977). The bushland event of September 10, 1977. IEEE Transactions on Power Apparatus and Systems, 96(4), 1315-1328.	Schweppe, F. C., & Wildes, J. (1970). Power system static-state estimation: III system implementation. IEEE Transactions on Power Apparatus and Systems, 89(1), 120-125.
Εναλλακτικές ονομασίες	SSR, Subsynchronous control interactions, Torsional oscillations	PSSE, WLS State Estimation, Power Flow State Estimation
Συναφείς	3	3
Σύνοψη	Subsynchronous Resonance (SSR) is a phenomenon where frequencies below the synchronous frequency (50/60 Hz) are amplified in power systems, causing oscillations that can damage turbines. First observed in Bushland, Texas in 1977, SSR results from interaction between series-compensated transmission lines and synchronous generators. Understanding and mitigating SSR is critical for stable grid operation, particularly with high levels of series compensation or power electronics.	Power System State Estimation (PSSE) is a real-time algorithm that estimates the voltage and phase angle at every bus in a power grid from a set of noisy, redundant measurements. Introduced by Schweppe in 1970, it combines measurements (power flows, voltage magnitudes) with the physical power flow model to produce the most likely system state. State estimation is the foundation of modern grid control centers, providing operators with an accurate digital representation of the actual network.