?VL?34.4977?6.045?22.6258?3.15115?1.19kV
变电站3高压侧电压为
V3?22(115?2.12)?1.19?112.89kV
变压器中电压降落的纵横分量分别为
?VT?34.0756?0.81?23.8064?20.15112.8934.0756?20.15?23.8064?0.81112.89?4.49kV ?5.91kV
?VL?归算到高压侧的电压
V3??(112.89?4.49)?5.91?108.56kV
22变电站低压侧电压
V3???108.56?6110?5.92kV
对于变电站节点4
???S4??ST4?j?QB?26?j17.42?0.0568?j0.2750?j2.79?(26.0568?j14.905)MV?AS4线路中的功率损耗： ?SL4?26.0568?14.905110222(6.27?j7.904)?(0.4640?j0.5849)MV?A
??S4????SL4?26.0568?j14.905?0.4640?j0.5849?(26.5208?j15.4899)MV?AS4由母线输出的功率
S4M?S4??j?QB?26.5208?j15.4899?j2.79?(26.5208?j12.6999)MV?A
线路中电压降落的纵、横分量分别为：
?VL?26.5208?6.27?15.4899?7.90411526.5208?7.904?15.4899?6.27115?2.51kV ?0.98kV
?VL?变电站4高压侧电压为
V4?(115?2.51)?0.98?112.49kV
22变压器中电压降落的纵横分量分别为
?VT?26.0568?1.07?17.695?25.4112.4926.0568?25.4?17.695?1.07112.49?4.24kV ?5.71kV
?VL?归算到高压侧的电压
V4??(112.49?4.24)?5.71?108.4kV
22 21
变电站低压侧电压
V4???108.4?10110?9.85kV
潮流图如下：
37.4869＋j21.7158 37.4869+j23.6258 37+j23.68 1 0.4113+j0.7894 －j1.91 0.0756+j0.3464 －j1.19 40.5769+j25.132 40.5769+j27.042 40+j27.6 2 －j1.91 0.4961+j0.9521 0.0808+j0.4 －j1.91 34.4977+j20.0364 34.4977+j22.3264 34+j23.46 3 －j2.29 0.4221+j0.81 0.0756+j0.3464 －j2.29 26.5208+j12.6999 26.5208+j15.4899 26 +j17.42 4 －j2.79 0.4640+j0.5849 0.0568+j0.2750 －j2.79 最小负荷时： 各变电站的负荷：
S1?(19?j13.76)MV?A S2?(21?j15.75)MV?A S3?(18?j13.032)MV?A S4?(14?j10.14)MV?A
对于变电站节点1
Sf1?S1??ST1?19?j13.76?0.0756?j0.3464?(19.0756?j14.1064)MV?AS1???Sf1?j?QB?19.0756?j14.1064?j1.91?(19.0756?j12.1964)MV?A
线路中的功率损耗： ?S19.07562?12.19642L?1102(2.625?j5.0375)?(0.1102?j0.2115)MV?A
22
S1??S1????SL?19.0756?j12.1964?0.1102?j0.2115?(19.1858?j12.4079)MV?A由母线输出的功率
S1M?S1??j?QB?19.1858?j12.4079?j1.91?(19.1858?j10.4979)MV?A
线路中电压降落的纵、横分量分别为：
?VL?19.1858?2.625?12.4907?5.037511519.1858?2.625?12.6258?5.0375115?0.98kV ??0.115kV
?VL?变电站1高压侧电压为
V1?(115?0.98)?(?0.115)?114.02kV
22变压器中电压降落的纵横分量分别为
?VT?19.0756?0.81?14.1064?20.15114.0219.0756?20.15?14.1064?0.81114.02?2.63kV ?3.27kV
?VL?归算到高压侧的电压
V1??(114.02?2.63)?3.27?111.44kV
22变电站低压侧电压
V1???111.44?10110?10.13kV
对于变电站节点2
Sf2?S2??ST2?21?j15.75?0.0808?j0.4?(21.0808?j16.15)MV?A ???Sf2?j?QB?21.0808?j16.15?j1.91?(21.0808?j14.24)MV?A S2线路中的功率损耗： ?SL2?21.0808?14.24110222(2.625?j5.0375)?(0.1391?j0.2670)MV?A
??S2????SL2?21.0808?j14.24?0.1391?j0.2670?(21.2199?j14.507)MV?AS2由母线输出的功率
S2M?S2??j?QB?21.2199?j14.507?j1.91?(21.2199?j12.597)MV?A
线路中电压降落的纵、横分量分别为：
?VL?21.2199?2.625?14.507?5.037511521.2199?5.0375?14.507?2.625115?1.12kV ?0.60kV
?VL?变电站2高压侧电压为
23
V2?22(115?1.12)?0.60?113.88kV
变压器中电压降落的纵横分量分别为
?VT?21.0808?0.59?16.15?15.9113.8820.0808?15.9?16.15?0.59113.88?2.36kV ?2.72kV
?VT?归算到高压侧的电压
V2??(113.88?2.36)?2.72?111.55kV
22变电站低压侧电压
V2???111.55?10110?10.14kV
对于变电站节点3
Sf3?S3??ST3?18?j13.032?0.0756?j0.3464?(18.0756?j13.3784)MV?A ???Sf3?j?QB?18.0756?j13.3784?j2.29?(18.0756?j11.0884)MV?A S3线路中的功率损耗： ?SL3?18.0756?11.0884110222(3.15?j6.045)?(0.1166?j0.2237)MV?A
??S3????SL3?18.0756?j11.0884?0.1166?j0.2237?(18.1922?j11.3121)MV?AS3由母线输出的功率
S3M?S3??j?QB?18.1922?j11.3121?j2.29?(18.1922?j9.0221)MV?A
线路中电压降落的纵、横分量分别为：
?VL?18.1922?3.15?11.3121?6.04511518.1922?6.045?11.3121?3.15115?1.09kV ?0.65kV
?VL?变电站3高压侧电压为
V3?(115?1.09)?0.65?113.9kV
22变压器中电压降落的纵横分量分别为
?VT?18.0756?0.81?13.3784?20.15113.918.0756?20.15?13.3785?0.81113.9?2.50kV ?3.1kV
?VL?归算到高压侧的电压
V3??(113.9?2.50)?3.1?111.44kV
22变电站低压侧电压
24
V3???111.44?6110?6.08kV
对于变电站节点4
Sf4?S4??ST4?14?j10.14?0.0568?j0.2750?(14.0568?j10.415)MV?A S??4?Sf4?j?QB?14.0568?j10.415?j2.79?(14.0568?j7.625)MV?A 线路中的功率损耗： 22?SL4?14.0568?7.6251102(6.27?j7.904)?(0.1317?j0.1660)MV?A
S?4?S4????SL4?14.0568?j7.625?0.1317?j0.1660?(14.1885?j7.791)MV?A由母线输出的功率
S4M?S4??j?QB?14.1885?j7.791?j2.79?(14.1885?j5.001)MV?A
线路中电压降落的纵、横分量分别为：
?V?6.27?7.791?7.904L?14.1885115?1.31kV ?V14.1885?7.904?7.791?6.27L?115?0.45kV
变电站4高压侧电压为
V4?(115?1.31)2?0.452?113.69kV
变压器中电压降落的纵横分量分别为
?V10.415?25.4T?14.0568?1.07?113.69?2.46kV ?V14.0568?25.4?10.415?1.07L?113.69?3.04kV
归算到高压侧的电压
V4??(113.69?2.46)2?3.042?111.27kV
变电站低压侧电压
V4???111.27?10110?10.11kV
潮流图如下：
25