Bandingkan kaedah

	Resonans Subsinchronous	Anggaran Keadaan Sistem Kuasa
Bidang	Kejuruteraan Elektrik	Kejuruteraan Elektrik
Keluarga	Process / pipeline	Process / pipeline
Tahun asal	1977	1970
Pengasas	E. William Kimbark, Robert Farmer	Fred Schweppe
Jenis	Identification and mitigation of subsynchronous oscillations in AC systems	Real-time state estimation using measurements and physical models
Sumber perintis	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.
Alias	SSR, Subsynchronous control interactions, Torsional oscillations	PSSE, WLS State Estimation, Power Flow State Estimation
Berkaitan	3	3
Ringkasan	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.