110KV35KV变电站继电保护整定计算书Word下载.docx
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Sj、Uj、Ij、Xj——一以基准量表示的容量(MVA)、电压(KV)、电流(KA)、电抗(Ω)
Se-----额定容量(MVA);
Ud%-----阻抗电压百分数;
X”d%-----超瞬变电抗百分数;
XO-----每千米电抗(Ω/km);
Up-----平均额定电压(KV);
X%-----电抗百分数;
L-----线路长度(km);
1、1#主变:
X1=Ud%/100*Sj/Se=7.85/100*100/20=0.3925
2#主变:
X2=Ud%/100*Sj/Se=8.06/100*100/20=0.403
2、6KV线路:
(集配站6302线路)X3线=XO*L*Sj/Up2=0.4*3.2*100/6.32=3.225
X3缆=XO*L*Sj/Up2=0.08*0.19*100/6.32=0.038
X3=X3线+X3缆=3.225+0.038=3.263
(旭飞公司6303线路)X4线=XO*L*Sj/Up2=0.353*2.2*100/6.32=1.9567
X4缆=XO*L*Sj/Up2=0.08*0.1*100/6.32=0.0202
X4=X4线+X4缆=1.9567+0.0202=1.9769
(恒兴公司6304线路)X5线=XO*L*Sj/Up2=0.347*4*100/6.32=3.4971
X5缆=XO*L*Sj/Up2=0.08*0.15*100/6.32=0.0302
X5=X5线+X5缆=3.4971+0.0302=3.5273
(金能公司6305线路)X6线=XO*L*Sj/Up2=0.347*4.6*100/6.32=4.0217
X6缆=XO*L*Sj/Up2=0.08*0.15*100/6.32=0.0302
X6=X6线+X6缆=4.0217+0.0302=4.0519
(一采区Ⅰ路线路)因6306线路为相分裂架设,故:
X7线=XO*L*Sj/Up2/2=0.333*2.6*100/6.32/2=1.091
X7缆=XO*L*Sj/Up2/2=0.08*0.4*100/6.32/2=0.0403
X7=X7线+X7缆=1.091+0.0403=1.1313
(环兴磁场6307线路)X8线=XO*L*Sj/Up2=0.347*4*100/6.32=3.4971
X8缆=XO*L*Sj/Up2=0.08*0.17*100/6.32=0.0171
X8=X8线+X8缆=3.4971+0.0171=3.5142
(乳化车间6308线路)X9线=XO*L*Sj/Up2=0.347*6.4*100/6.32=5.5954
X9缆=XO*L*Sj/Up2=0.08*0.07*100/6.32=0.0141
X9=X9线+X9缆=5.5954+0.0141=5.6095
(众元洗煤三分厂6309线路)X10(架空)=XO*L*Sj/Up2/2=0.333*1.7*100/6.32=1.4263
X10(电缆)=XO*L*Sj/Up2/2=0.08*0.24*100/6.32=0.0484
X10=X10(架空)+X10(电缆)=1.4263+0.0484=1.4747
(1#动力变6311线路)X11(电缆)=XO*L*Sj/Up2/2=0.08*0.22*100/6.32=0.0443
(三泵房6402线路)因6402线路为电缆线路,故:
XO为0.08Ω/km
X12=XO*L*Sj/Up2=0.08*0.4*100/6.32=0.0806
(深井专线6403线路)X13线=XO*L*Sj/Up2=0.353*2.5*100/6.32=2.2235
X13缆=XO*L*Sj/Up2=0.08*0.5*100/6.32=0.1008
X13=X13线+X13缆=2.2235+0.1008=2.3243
(众元洗煤厂6404线路)因6404线路为电缆线路,故:
X14=XO*L*Sj/Up2=0.08*0.5*100/6.32=0.1008
(一采区Ⅱ路线路)因6406线路为相分裂架设,故:
X15线=XO*L*Sj/Up2/2=0.325*3.6*100/6.32/2=1.4739
X15缆=XO*L*Sj/Up2/2=0.08*0.32*100/6.32/2=0.0302
X15=X15线+X15缆=1.4739+0.03225=1.5062
(石康铸造6407线路)X16线=XO*L*Sj/Up2=0.365*0.3*100/6.32=0.2759
X16缆=XO*L*Sj/Up2=0.08*0.15*100/6.32=0.2653
X16=X16线+X16缆=0.2759+0.2653=0.5412
(化工厂6408线路)X17线=XO*L*Sj/Up2=0.347*8.4*100/6.32=7.3439
X17缆=XO*L*Sj/Up2=0.08*0.11*100/6.32=0.02217
X17=X17线+X17缆=7.3439+0.02217=7.366
(四泵房6409线路)X18线=XO*L*Sj/Up2=0.347*4*100/6.32=3.4971
X18缆=XO*L*Sj/Up2=0.08*0.15*100/6.32=0.0302
X18=X18线+X18缆=3.4971+0.0302=3.5273
(然尔特6410线路)X19线=XO*L*Sj/Up2=0.325*2.1*100/6.32=1.719
X19缆=XO*L*Sj/Up2=0.08*0.3/2*100/6.32=0.030
X19=X线+X缆=1.719+0.030=1.749
(三矿物业6412线路)X20线=XO*L*Sj/Up2=0.353*1.8*100/6.32=1.601
X20缆=XO*L*Sj/Up2=0.08*0.1*100/6.32=0.0202
X20=X19线+X19缆=1.601+0.0202=1.6212
三、计算K2点的短路参数(K2点前的总阻抗及短路电流)
1、最大运行方式下:
XK2max=0.24756+0.3925=0.64006
最小运行方式下:
XK2min=0.37084+0.3925=0.76334
2、k2点的超瞬变短路电流I”:
(用来作继电保护的整定计算和校验断路器的断流量)
根据:
I”k2=Ij/XK2max设基准容量为:
Sj=100MVA
且基准电流为:
Ij=Sj/
Up=100/
*6.3=9.165(KA)
I”k2=Ij/XK2max=9.165/0.64006=14.319(KA)
同理:
I”k2=Ij/XK2min且基准电流为:
I”k2=Ij/XK2min=9.165/0.76334=12.006(KA)
四、计算末端K6302-----K6412点的短路参数(K6302-----K6412各点的阻抗及三相短路电流)
1、∵K6302max=XK2max+X3=0.64006+3.263=3.90306
K6302min=XK2min+X3=0.7634+3.263=4.0264
∴I”6302max=Ij/K6302max=9.165/3.90306=2.349(KA)
I”6302min=Ij/K6302min=9.165/4.0264=2.277(KA)
2、K6303max=XK2max+X4=0.64006+1.9769=2.617
K6303min=XK2min+X4=0.76334+1.9769=2.740
∴I”6303max=Ij/K6303max=9.165/2.617=3.502(KA)
I”6303min=Ij/K6303min=9.165/2.74=3.345(KA)
3、K6304max=XK2max+X5=0.64006+3.5273=4.167
K6304min=XK2min+X5=0.7634+3.5273=4.291
∴I”6304max=Ij/K6304max=9.165/4.167=2.199(KA)
I”6304min=Ij/K6304min=9.165/4.291=2.136(KA)
4、K6305max=XK2max+X6=0.64006+4.0519=4.5755
K6305min=XK2min+X6=0.76334+4.0519=4.6996
∴I”6305max=Ij/K6305max=9.165/4.5755=2.003(KA)
I”6305min=Ij/K6305min=9.165/4.6996=1.950(KA)
5、K6306max=XK2max+X7=0.64006+1.1313=1.771
K6306min=XK2min+X7=0.76334+1.1313=1.895
∴I”6306max=Ij/K6306max=9.165/1.771=5.175(KA)
I”6306min=Ij/K6306min=9.165/1.895=4.836(KA)
6、K6307max=XK2max+X8=0.64006+3.5142=4.154
K6307min=XK2min+X8=0.76334+3.5142=4.278
∴I”6307max=Ij/K6307max=9.165/4.154=2.206(KA)
I”6307min=Ij/K6307min=9.165/4.278=2.142(KA)
7、K6308max=XK2max+X9=0.63006+5.6095=6.2396
K6308min=XK2m