3-2开式网络的电压和功率分布5551.同一电压等级的几段线路一开式网络及其等值电路一电压和功率分布的计算2.两级电压的开式电力网2025/8/12SCU-SEEI-Tqliu
12 SCU-SEEI-Tqliu 2025/8/7 3-2 开式网络的电压和功率分布 1.同一电压等级的几段线路 –开式网络及其等值电路 –电压和功率分布的计算 2.两级电压的开式电力网
1.同一电压等级几段线路的电压和功率分布（1）用V~求得各点的运算负荷（2）从未段线路开始，用V~依次计算各段线路的功率损耗（3）用V和已求得的功率分布，丛A点开始逐段计算电压降落，求得V，和√.V
13 SCU-SEEI-Tqliu 2025/8/7 （1）用VN求得各点的运算负荷 （2）从末段线路开始，用VN依次计算各段 线路的功率损耗 （3）用VA和已求得的功率分布，从A点开始 逐段计算电压降落，求得Vb和 Vc Vd 1.同一电压等级几段线路的电压和功率分布
AQB; =-B,IS.= SLDb + jAQBI + jAOS.= StDe + jAQB2 + jAQP2Sa= SuDa + jAQB3R3+jxRi+jX,R2+jX2bdCAO运算负荷湾B2jB2iBB31222.(b)14SCU-SEEI-Tqliu2025/8/7
14 SCU-SEEI-Tqliu 2025/8/7 2 2 1 QBi = − Bi VN 3 2 3 1 2 d LDd B c LDc B B b LDb B B S S j Q S S j Q j Q S S j Q j Q = + = + + = + + 运算负荷
d2b1CASLDbSLDCSLDdRi+iXiR2+iX2R3+jX3SSAOAQBjBi/2jB1/2B2/2jB2/2jB3/2jB3/2SipdSLD115SCU-SEEI-Tqliu2025/8/7
15 SCU-SEEI-Tqliu 2025/8/7 A 1 b 2 c 3 d S L D b S L D c S L D d A R1+ jX1 R2 +jX2 R3+ jX3 j B1/2 j B1/2 j B2/2 j B2/2 j B3/2 j B3/2 b c d S L D b S L D c S L D d QB1
Ri+jXiR2+iX2R3+jX3bCCASI"SiS3"S2"S3S2'jB1/2SS.福Sa = SLDd + jAQB3S, = SLDb + jAOBI + jAOB2S。= SLDe + jAQB2 + jAQB316SCU-SEEI-Tqliu2025/8/7
16 SCU-SEEI-Tqliu 2025/8/7 Sd R1+ jX1 R2 +jX2 R3+ jX3 j B1/2 b c d Sb Sc S1 S1 S2 S2 S3 S3 A c LDc B2 QB3 S = S + jQ + j b LDb B1 QB2 S = S + jQ + j d LDd QB3 S = S + j