手法を比較

	対称成分	電力系統状態推定
分野	電気工学	電気工学
系統	Process / pipeline	Process / pipeline
提唱年	1918	1970
提唱者	Charles Legeyt Fortescue	Fred Schweppe
種類	Decomposition method for analyzing unbalanced three-phase circuits	Real-time state estimation using measurements and physical models
原典	Fortescue, C. L. (1918). Method of symmetrical co-ordinates applied to the solution of polyphase networks. AIEE Transactions, 37(2), 1027-1044.	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.
別名	Symmetrical component analysis, Phase component decomposition	PSSE, WLS State Estimation, Power Flow State Estimation
関連	3	3
概要	Symmetrical Components is a mathematical technique for analyzing unbalanced three-phase electrical circuits by decomposing them into balanced component sets. Introduced by Charles Fortescue in 1918, the method transforms the complex analysis of unbalanced systems into simpler balanced equivalent circuits. Symmetrical components are fundamental to understanding faults, protection coordination, and stability in power systems, remaining essential in modern grid operations.	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.