《电力系统分析理论》课程教学资源（PPT课件）第八章 不对称故障的分析计算

11":lbalaa2aaoCVaaLalLa12a1a2-a1b311alC对称分量变换矩阵SSCU-SEEI2025/8/7

SCU-SEEI-ltq 2025/8/7 1 1 1 1 1 3 1 2 2 0 2 1                     =           c b a a a a I I I a a a a I I I       对称分量 变换矩阵S 1 1 1 1 1 0 2 1 2 2                     =           a a a c b a I I I a a a a I I I      

2. 序阻抗Ia△VaaooaZaaZabIb一△bob0ZacZbbZbcIc一AVCoCOZccAV, = Zaai. +Zabi, +Z.ciSCU-SEEI-Itq2025/8/7

SCU-SEEI-ltq 2025/8/7 2.序阻抗 Va a a Ia Vb b b Ib Vc c c Ic Zaa Zbb Zcc Zac Zab Zbc a a a a a b b a c c V Z I Z I Z I   =  +  + 

ZZZAVIqabaaac6AVZZbbLrcabAVZZbcZacCC:SZIV120 = SAV= SZS-'I120 = Zscl120一abcabc= S-'I120aboSCU-SEEI-Itq2025/8/7

SCU-SEEI-ltq 2025/8/7 V120 = SVabc 120 1 I S I − abc = = SZI abc 120 120 1 SZS I Z I = = s c −                     =              c b a a c b c cc a b b b b c a a a b a c c b a I I I Z Z Z Z Z Z Z Z Z V V V      

元件结构参数完Zag = Zbb = Zcc = Z全对称时：Zab =Zbc =Zca =ZmZsc = SZS-1Z. Zm ZmaQna21 ZmZ.ZmaaOZZmZ.aQmmSCU-SEEI-Itq2025/8/7

SCU-SEEI-ltq 2025/8/7 元件结构参数完 全对称时： a b b c ca m a a b b cc s Z Z Z Z Z Z Z Z = = = = = =                               = = − 1 1 1 1 1 1 1 1 1 1 3 1 2 2 2 2 1 a a a a Z Z Z Z Z Z Z Z Z a a a a m m s m s m s m m Zs c SZS

00[Z,-Z.m00Z.=Z,-Zm久SC00Z,+2Zm00Z00Z200ZoSCU-SEEI-Itq2025/8/7

SCU-SEEI-ltq 2025/8/7           =           + − − = 0 2 1 0 0 0 0 0 0 0 0 2 0 0 0 0 Z Z Z Z Z Z Z Z Z s m s m s m Zs c