(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:
62 6kV:XT0.10090.1453;LT0.4625mH ;
25(3) 1#或2#主变阻抗计算
1 uk1%(10.118.06.5)%10.8%;
21uk2%(10.16.518.0)%0.7%;
21uk3%(18.06.510.1)%7.2%;
21020.1080.343, LT11.091mH; 10kV:XT131.5 XT2102(0.007)0.022, LT20.0707mH; 31.51020.0720.2286; LT30.728mH; 31.5 XT3360.1080.1234, LT10.3929mH; 31.536(0.007)0.008, LT20.0255mH; XT231.5360.0720.0823; LT30.262mH; XT331.5(5) 10kV母线短路容量计算
6kV: XT1 计算等效电路如下图所示:
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
5.77425.77429.806, XL31.873 RL3.41.046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
XmaxXsmaxXT1XT20.117+0.343-0.022=0117.+0161.=0.438 2Smin100MVA228MVA; 0.438 XminXsminXT1XT20.05480.343-0.0220.376;
Smax100MVA463MVA; 0.216 (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
3.46423.46422.806, XL11.009 RL4.2761.090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 Smin 62MVA146MVA; 0.247 Xmin=0.01970.1230.08230.225;
Smax62MVA160MVA 0.2256KV Ⅲ段短路容量计算
Xman=XsmanXT0.04210.14530.1874
Smin36MVA193MVA 0.187Xmin=XsmanXT0.01970.14530.165
Smin
36MVA218MVA 0.165
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