低压配电系统短路电流计算(第2版).xlsx

1、配配电电系系统统参参数数Rk(m)Xk(m)R P(m)高压系统短路容量(MVA)3000.0530.530.035变压器容量（kVA）630变压器阻抗电压（%）4%2.269.92.26配电母线规格类型铜母线母线长度L1(m)80.2241.041.062一级配电线路形式 铜芯电缆规格(mm2或A)9523.27.369.6长度L2（米）100二级配电线路形式 铜芯电缆规 格(A)2587.27.91225长度L3（米）100三级配电线路形式BV穿钢管规 格(A)1020.81.141.6长度L4（米）10电流名称三相短路电流（KA）单相短路电流（KA）阻抗比峰值系数 冲击电流（kA）计算公

2、式Ik=230/XK2+RK2Id=220/Xp2+Rp2RK/XKKIch=2*K*Ik短路点K121.52920.9450.2221.80054.803K219.57917.8050.2211.80049.840K3 7.2202.9521.3711.30013.274K41.9820.7644.2331.3003.644K51.6840.6714.8141.3003.096X XP P (m)(m)0.359.92.22414.8515.92.6备备注注高压侧短路容量(MVA)RSXSRPXP2000.0800.7960.0530.5303000.0530.5300.0350.35050

3、00.0320.3180.0210.210无穷大0.0000.0000.0000.000变压器容量（KVA）阻抗电压RT(m/m)XT(m/m)RP(m/m)31545.3519.585.3540043.8315.543.8350043.0112.443.0163042.269.92.2680061.6711.891.67100061.279.51.27125060.977.620.97160060.715.960.71200060.564.770.56250060.433.820.43 XP(m/m)19.5815.5412.449.911.899.57.625.964.773.82变压器容

4、量低压铜排(mm)母线槽（A）Rm(20c)(m/m)Xm(m/m)2004（40 x4）+30 x40.11200.01742504（40 x4）+30 x46300.11200.01743154（50 x5）+40 x46300.07160.16004004（63x6.3）+40 x48000.04970.14805004（80 x6.3）+50 x510000.03730.13006304（80 x8）+50 x512500.02800.13008004（100 x8）+63x6.316000.02240.116010004（125x10）+80 x6.320000.01490.1040

5、12504（2x100 x10）+100 x1025000.00900.063516004（2x125x10）+125x1031500.00750.058020004（2x125x10）+125x1040000.00750.058025004（2x125x10）+125x1050000.00750.0580注：GCS柜母排间距110mm,本表按125间距。RmP(70c)(m/m)XmP(m/m)0.04460.36600.04460.36600.04070.33400.23780.32200.16580.29000.13280.27800.10200.24600.07340.23400.03

6、920.13400.03670.12850.03670.12850.03670.1285母线额定电流（A）R(m/m)X(m/m)RP(m/m)XP(m/m)2500.10750.04720.24720.10864000.08060.0460.18540.10586300.08310.03820.19120.08768000.06990.03320.16080.076410000.05340.02640.12290.060712500.04010.02020.09220.046516000.03060.01550.07050.035718000.02730.01380.06290.031720

7、000.02390.01190.0550.027425000.01960.00970.04510.022330000.01660.00820.03820.018935000.01370.00690.03140.015940000.0120.0060.02750.013845000.00930.00690.02150.015950000.00770.00780.01780.0179电缆截面(mm2)R（m/m）X(m/m)RP(m/m)XP(m/m)45.5300.09914.4200.19963.7000.0949.2300.193102.2000.0845.9000.178161.3800.

8、0803.5800.164250.8720.0792.2500.159350.6290.0762.0100.156500.4640.0761.3400.155700.3220.0730.9510.149950.2320.0730.6960.14851200.1840.0720.5060.1451500.1490.0710.4710.1451850.1190.0710.3510.1442400.0910.0710.2750.1433000.0720.0710.2210.1422-1200.0920.0360.2530.0732-1500.0750.0360.2360.0732-1850.0600

9、.0360.1760.0722-2400.0450.0360.1380.0722-3000.0360.0350.1110.071截面(mm2)R（m/m）X(m/m)RP(m/m)XP(m/m)1.513.780.1427.560.322.58.440.1316.880.2945.2500.1210.5000.2863.5100.117.0200.26102.0800.114.1600.26161.3100.12.6200.25250.8280.11.6520.23350.5970.11.1940.24500.4410.090.8820.21700.3050.090.6100.22950.2200.090.4400.221200.1740.080.3480.211500.1410.080.2820.211850.1130.080.2260.2