השוואת שיטות

	תהודה תת-סינכרונית	התחייבות יחידות
תחום	הנדסת חשמל	הנדסת חשמל
משפחה	Process / pipeline	Process / pipeline
שנת המקור	1977	1959
הוגה השיטה	E. William Kimbark, Robert Farmer	Charles J. Baldwin
סוג	Identification and mitigation of subsynchronous oscillations in AC systems	Combinatorial optimization for generator turn-on/turn-off scheduling
מקור מכונן	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.	Baldwin, C. J., Dale, K. M., & Dittrich, R. F. (1959). A study of the economic shutdown of generating units in daily dispatch. AIEE Transactions, 78(3), 272-282.
כינויים	SSR, Subsynchronous control interactions, Torsional oscillations	UC, Generator Commitment, Thermal Unit Scheduling
קשורות	3	3
תקציר	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.	Unit Commitment (UC) is the problem of deciding which power generation units should be switched on or off over a planning horizon (typically 24-168 hours) to minimize total operating cost while meeting demand and reserve requirements. Introduced by Baldwin et al. in 1959, UC is a fundamental scheduling problem in power system operations, combining combinatorial optimization (which units to commit) with continuous optimization (optimal power output). UC remains one of the most important and computationally challenging problems in power systems.