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输电系统如下图所示,已知每台变压器额定容量 MVA, =3500kvar, =1000kW, =12.5 ,每回线路长250km, =0.08Ω/km, =0.4Ω/km, ;负荷 =150MW, 。线路首端电压 =245kV,试计算: (1)输电线路,变压器以及输电系统的电压降落和电压损耗。 (2)输电线路首端功率和输电效率。 (3)线路首端A,变压器低压侧C的电压偏移。
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