如图所示为一个5节点电力系统。已知负荷1，2，3的大小分别为(67.5+j41.83)MVA，(60.0+j37.18)MVA，(90.0+j55.77)MVA；发电机出力为SG1=97.5+j60MVA。取母线2为平衡节点，线路参数如表1所示，进行潮流计算。-As shown in Figure 5 is a node power system. Known load size 1,2,3 respectively (67.5+ j41.83) MVA, (60.0+ j37.18) MVA, (90.0+ j55.77) MVA　generator output is SG1 = 97.5+ j60MVA. Take bus 2 to balance the node, the line parameters as shown in Table 1, flow calculation.