2“S2 G G+g, G+g, G+G R R 或表示为: Mn=a '+a2us2 ta3us3 (2) 1+ 3) n 支路电流为: 2 G3us3-+ S1 G+G 3 G2+G3G2+G3 2+(3) bs1+b2s2+b3u3=以21)+2) G G S33 us2+( G3_Gaus G2+G3 G2+G3 G+G 3 十R 1i s1 R 2us2 R 3us3 i 2 i3 +– +– 1 2 3 1 2 3 3 3 2 3 2 2 1 G G i G G G u G G G u u S S S n + + + + + = 或表示为： ( ) ( ) ( ) 31 21 11 1 1 1 2 2 3 3 n n n n S s S u u u u a i a u a u = + + = + + 支路电流为： ( ) ( ) ( ) ( ) ( ) ( ) 33 23 13 2 3 1 3 3 2 3 3 2 2 3 2 3 1 3 3 i i i G G i G u G G G u G G G i u u G S n S S S = + + + − + + + + = − = ( ) ( ) ( ) ( ) ( ) 32 22 1 1 1 2 2 3 3 2 2 3 1 2 3 3 3 2 2 2 3 2 2 1 2 2 b i b u b u i i i G G i G G G u G u G G G i u u G S S S S S n S S = + + = + + + + + − + + = − =