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	Ekonomisk drift (ED)	Snabbkopplad effektflödesmetod	Optimal Power Flow
Ämnesområde	Elektroteknik	Elektroteknik	Elektroteknik
Familj	Process / pipeline	Process / pipeline	Process / pipeline
Ursprungsår	1958	1972	1962
Upphovsperson	Lester K. Kirchmayer	Brian Stott, Octave Alsac	Jean Carpentier
Typ	Continuous optimization for allocating power output among committed generators	Decoupled iterative solution method for power system analysis	Nonlinear constrained optimization for power system operation
Ursprungskälla	Kirchmayer, L. K. (1958). Economic Operation of Power Systems. Wiley & Sons.	Stott, B., & Alsac, O. (1972). Fast decoupled load flow. IEEE Transactions on Power Apparatus and Systems, 91(3), 859-869.	Carpentier, J. (1962). Contribution à l'étude du dispatching économique. Bulletin de la Société Française des Électriciens, 8(3), 431-447.
Alias	ED, Least-Cost Generation Dispatch	FDLF, Fast Decoupled Load Flow	OPF, Economic Dispatch with Constraints
Närliggande	3	3	3
Sammanfattning	Economic Dispatch (ED) is the process of optimally allocating power output among committed generators to meet demand at minimum fuel cost. Introduced by Kirchmayer in 1958, ED is a fundamental real-time optimization problem solved every few minutes in power system operations. Unlike Unit Commitment (which decides generator on/off), ED assumes generators are already committed and focuses on splitting load most economically. ED's rapid feedback enables efficient real-time power plant operations.	The Fast Decoupled Load Flow (FDLF) method, introduced by Stott and Alsac in 1972, exploits the weak coupling between active and reactive power in power systems to accelerate convergence beyond standard Newton-Raphson. By decoupling the equations and using constant, approximate Jacobians, it reduces computation per iteration while maintaining acceptable accuracy for most practical systems. This method remains widely used in operational software for its speed and numerical stability.	Optimal Power Flow (OPF) is a fundamental optimization framework for computing the most economical and secure operating point of an electrical power system. Introduced by Jean Carpentier in 1962, OPF minimizes operational costs (fuel, losses, or other expenses) while satisfying physical and operational constraints. Modern electric grids depend on OPF for real-time economic dispatch, security analysis, and planning, making it one of the most important problems in power systems engineering.