某节点的自导纳为与该节点相接的各支路导纳之和。
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Y 11 =y 10 +y 12 +y 13 =j0.1-j2.5-j2=-j4.4, Y 12 =Y 21 =-y 12 =j2.5 Y 13 =Y 31 =-y 13 =j2,Y 22 =y 20 +y 12 +y 23 =-j4.9 Y 23 =Y 32 =-y 23 =j2.5, Y 33 =y 30 +y 31 +y 32 +y 34 =-j14, Y 34 =Y 43 =-y 34 =j10 Y 44 =Y 34 =-j10 该电路节点导纳矩阵Y B

