短路容量计算
(1)110kV: 最大短路容量 Sdmax1825MVA;
最小短路容量 Sdmin855MVA;
110 kV:Xsmin6.630 ; Lsmin21.104mH;
Xsmax14.152 ; Lsmax45.047mH;
10kV:Xsmin0.0548 ; Lsmin0.1744mH;
Xsmax0.11696 ; Lsmax0.3723mH;
6kV:Xsmin0.01973; Lsmin0.0628mH;
Xsmax0.0421; Lsmax0.1340mH ;
(2) 3#主变:
62XT0.10090.1453256kV:;LT0.4625mH ;
(3) 1#或2#主变阻抗计算
u1k1%2(10.118.06.5)%10.8%;
u1k2%2(10.16.518.0)%0.7%;
u1k3%2(18.06.510.1)%7.2%;
10210kV:XT131.50.1080.343, 102
XT231.5(0.007)0.022, 102
XT331.50.0720.2286; 366kV:
XT131.50.1080.1234,
XT23631.5(0.007)0.008, 36
XT331.50.0720.0823; (5) 10kV母线短路容量计算
计算等效电路如下图所示:
LT11.091mH;
LT20.0707mH;
LT30.728mH;
LT10.3929mH;
LT20.0255mH;
LT30.262mH;
10kVXT2XsXT1XT3XLRL
图中, Xsmax0.117 ;Xsmin0.0548 ;
XT10.343,XT20.022,XT30.229
按照较大工况下,1#和2#主变6kV出线功率计算RL 和XL (数据来源见典型波形与频谱分析)
S23.400j1.046, (单相功率) S12.462j1.449, (单相功率)
我们用S2计算RL 和XL
5.77425.7742RL9.806XL31.8733.41.046 ,
由于|RL||jXL|远大于XT1,Xs等,故计算等效电路可以简化为
XsXT1 XT2 10kV
XmaxXsmaxSminXT1XT20.117+0.343-0.022=0117.+0161.=0.4382
100MVA228MVA0.438;
XminXsminXT1XT20.05480.343-0.0220.376;
Smax100MVA463MVA0.216;
(6) 6kV I段和II段母线短路容量计算
计算等效电路如下图所示:
6kVXT3XsXT1XT2RLXL
图中, Xsmax0.0421 ;Xsmin0.0197 ;XT0.1453;
XT10.1234;XT20.008;XT30.0823;
按照较大工况下,1#和2#主变10kV出线功率计算RL 和XL (数据来源见典型波形与频谱分析)
S23.860j1.807, (单相功率) S14.276j1.090, (单相功率)
我们用S1计算RL 和XL
3.46423.4642RL2.806XL11.0094.2761.090 ,
由于|RL||jXL|远大于XT1,Xs等,故计算等效电路可以简化为
XsXT1 XT36kV
Xmax=0.0421+0.1230.0823=0.247
Smin62MVA146MVA0.247;
Xmin=0.01970.1230.08230.225;
Smax62MVA160MVA0.225
6KV Ⅲ段短路容量计算
Xman=XsmanXT0.04210.14530.1874
Smin36MVA193MVA0.187
Xmin=XsmanXT0.01970.14530.165
Smin36MVA218MVA0.165
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