a=E, -XaidVg=WdV, = E,- jXaiV, = E, - XaiaL va=-jX,iVa = Xqigqq=E, - jX, Iα- jX, Ia±jX, Iad=E, +j(X,-X)Ia-jX, 1Eo= E, -j(X, -Xa)Iα-jX, IE!±jXaIaSCU-SEEI-Tqliu2025/8/7
SCU-SEEI-Tqliu 2025/8/7 . . ' ' q d V E jX I jX I = − − q q d d q q q q d d v X i v E X i = = − d q q q q d d V jX I V E jX I = − = − d q d d = E − Xi . q d jX I . d q jX I q d v = . . ' ' ( ) d = + − − E j X X I jX I q q d q EQ E . . ' ' ' ( ) q = − − − E j X X I jX I q q d d
jX iEQ=Eo-jXqijXiE'DLV=E'-jX12025/8/7SCU-SEEI-Tqliu
SCU-SEEI-Tqliu 2025/8/7 . V E jX I = Q − q . ' ' V E jX I = − d EQ V q jX I E V Xd j I
次暂态电势和次暂态电抗的定义UD(6-64)(6-65)O1SCU-SEEI-Tqliu2025/8/7
SCU-SEEI-Tqliu 2025/8/7 次暂态电势和次暂态电抗的定义 a d f D D D f f q X X X X X E + + + = 1 1 1 a d f D d a X X X X X + + = + 1 1 1 1 (6-64) (6-65)
X60(6-66)XXaq1X(6-67)XK0agSCU-SEEI-Tqliu2025/8/7
SCU-SEEI-Tqliu 2025/8/7 Q a q Q Q d X X X E 1 1 + = − Q a q q a X X X X 1 1 1 + = + (6-66) (6-67)
稳态Wa= E, - XaidVg = E, - Xaidy-Wg=Ea +XigVa = Ea + XaicVa=-VV= E" - jX, Ia- jX, Ia+jXIg= E" - jX, I+ j(X, - X)I~E"- jX, I同样可得向量图6-26SCU-SEEI-Tqliu2025/8/7
SCU-SEEI-Tqliu 2025/8/7 . . " " " d q V E jX I jX I = − − d q q d q q d q d d E X i E X i " " " " − = + = − d d q q q q d d v E X i v E X i " " " " = + = − 稳态 d q q d v v = − = 同样可得向量 图6-26 . " q d jX I . . " " " " . " " ( ) q d q d d E jX I j X X I E jX I = − + − −