短路电流计算表

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(1)计算说明:(2)设计依据设计依据:(3)基本资料:发电机:140.8510.50.2420.8510.50.2变压器:4011110《水电站机电设计手册》(电气一次)中第三章“短路电流计算”扩大G1额定功率(MW):扩大G2额定功率(MW):扩大G1功率因数cosφ:扩大G2功率因数cosφ:扩大G1额定电压(kV):扩大G2额定电压(kV):扩大G1次暂态电抗:扩大G2次暂态电抗:单元接线G3额定功率(MW):生态电站G4额定功率(MW):G3主变TM2额定容量(MVA):单元接线G3功率因数cosφ:生态电站G4功率因数cosφ:单元接线G3额定电压(kV):生态电站G4额定电压(kV):单元接线G3次暂态电抗:生态电站G4次暂态电抗:扩大G1额定电流(kA):扩大G2额定电流(kA):单元G3额定电流(kA):生态G4额定电流(kA):G1、G2主变TM1额定容量(MVA):G1、G2主变TM1短路阻抗Ud%:G3主变TM2短路阻抗Ud%:G1、G2主变TM1高压侧额定电压(kV):G3主变TM1高压侧额定电压(kV):0.081238587X8X8XcosU3e1PINFcosU3e2PINFcosU3e3PINFcosU3e4PINF6.311110线路:110265115110265115(4)计算各电抗标幺值:1.211.210.403.20线路电压等级(kV):2号线路距离(km):3号线路距离(km):1号线路距离(km):4号线路距离(km):平均额定电压:取;电压基准值取各段的平均额定电压。平均额定电压:1号线路距离(km):短路电流计算阻抗图G4主变TM3额定容量(MVA):G4主变TM3短路阻抗Ud%:G4主变TM3高压侧额定电压(kV):线路电压等级(kV):出线回路数(回):出线回路数(回):MVASB100cosPSXX1B''d11cosPSXX2B''d22cosPSXX3B''d33cosPSXX4B''d480.280.220.160.161.7518.68(5)求d1点短路电流简化电抗值:0.080.881.38d1点短路时等值阻抗图1Bd14S100%UXS2Bd25S100%UXS411221XXX))1.1(S4.0(X2B7hUl6111XnX))1.1(S4.0(X2B6hUl3Bd29S100%UXS))1.1(S4.0(X2B10hUl6113XXX23.63计算电抗值:0.080.290.681.48t=0s3.80.6284590350.4018830146.180049742查:水电站机电设计手册P99水轮机发电机运算曲线数字表短路电流标幺值:1111XXjs*12IBjsSPXXcos/41414BjsSPXXcos/211212*13IhFUPII3cos/12*122,1hFUPII3cos/3*133hBjsUSXI3111系109814XXXXBjsSPXXcos/313130.022592637.210391792t=0.1st=0.2s*8I*9I*8I*9I系总IIIIIFFFd432,11hBjsUSXI3111系hFUPII3cos/4*144t=2st=4s*8I*9I*8I*9I(6)求d2点短路电流简化电抗值:1.214285711.214285710.275000001.3767628723.630904191.216.33108.62计算电抗值:0.374.6016.710.08123862611XX2X4X14134111111XXXXYYXC411CXX系621XXXFF133CXXF系jSX1X13X14X144CXXF0.23.136.79额定电流值:t=0s短路电流标幺值:5.535.535.015.01查表:水电站机电设计手册P99水轮发电机运算曲线数字表B1F121ScosPXjSFjSFXXBjSFSXcosPX3F33112,1cos32eNFUPINjSFFXI3*31134,3cos32eNFUPIBjSFSXcosPX4F44NjSFFXI1*11NjSFFXI2*21NjSFFXI4*41NFFFIII1*11NFFFIII2*220.870.0514.725696t=0.1s短路电流标幺值:t=0.2s短路电流标幺值:1eBjs4*43*32*21*14321U3S1系系厂XIIIIIIIIIIIIIINFFNFFNFFNFFXFFFFNFFFIII3*33NFFFIII4*441eBjsU3S1系系统XI1eBjs4*43*32*21*1432U3S1系系机XIIIIIIIIIIIIINFFNFFNFFNFFXFFFt=2s短路电流标幺值:t=4s短路电流标幺值:140.8510.50.250.810.50.20.91(kA)0.91(kA)2.72(kA)0.34(kA)5011110《水电站机电设计手册》(电气一次)中第三章“短路电流计算”6500取;电压基准值取各段的平均额定电压。d1点短路时等值阻抗图1.62*13I*13I*14I*9I*9I*9I*9I0.370.320.1520.65kA25.66kA(1)计算说明:(2)设计依据设计依据:(3)基本资料:发电机:25250.850.8510.510.50.20.210100.850.8510.510.50.20.21.621.620.650.65变压器:63251111110110《水电站机电设计手册》(电气一次)中第三章“短路电流计算”大机G1额定功率(MW):大机G2额定功率(MW):大机G1功率因数cosφ:大机G2功率因数cosφ:大机G1额定电压(kV):大机G2额定电压(kV):大机G1次暂态电抗:大机G2次暂态电抗:小机G3额定功率(MW):小机G4额定功率(MW):G3、G4主变TM2额定容量(MVA):小机G3功率因数cosφ:小机G4功率因数cosφ:小机G3额定电压(kV):小机G4额定电压(kV):小机G3次暂态电抗:小机G4次暂态电抗:大机G1额定电流(kA):大机G2额定电流(kA):小机G3额定电流(kA):小机G4额定电流(kA):G1、G2主变TM1额定容量(MVA):G1、G2主变TM1短路阻抗Ud%:G3、G4主变TM2短路阻抗Ud%:G1、G2主变TM1高压侧额定电压(kV):G3、G4主变TM1高压侧额定电压(kV):cosU3e1PINFcosU3e1PINFcosU3e1PINFcosU3e1PINF线路:1106520650115(4)计算各电抗标幺值:0.680.681.701.700.440.171号线路距离(km):4号线路距离(km):线路电压等级(kV):2号线路距离(km):出线回路数(回):3号线路距离(km):平均额定电压:取;电压基准值取各段的平均额定电压。短路电流计算阻抗图MVASB100cosPSXX1B''d11cosPSXX2B''d22cosPSXX3B''d33cosPSXX4B''d441Bd15S100%UXS2Bd26S100%UXS0.09(5)求d1点短路电流简化电抗值:1.290.510.09计算电抗值:0.300.300.09t=0s3.733.731.101575282d1点短路时等值阻抗图查:水电站机电设计手册P99水轮机发电机运算曲线数字表短路电流标幺值:61921XXX7X77XXjs*8I))1.1(S4.0(1X2B7hUln53821XXXBjsSPXXcos/2388BjsSPXXcos/2199*9IhFUPII3cos/12*92,10.4406301135.6543366267.196542021t=0.1s3.043.040.8977986210.3591194495.6543366266.911254696t=0.2s2.952.950.871219057短路电流标幺值:短路电流标幺值:*8I*9I*8I*9I系总IIIIFFd4,32,11hFUPII3cos/32*84,3hBjsUSXI317系hFUPII3cos/12*92,1hFUPII3cos/32*84,3hBjsUSXI317系系总IIIIFFd4,32,11hFUPII3cos/12*92,10.3484876235.6543366266.874043306t=2s2.972.970.8771256270.3508502515.6543366266.8823125046.88t=4s2.992.990.883032197短路电流标幺值:短路电流标幺值:*8I*9I*8I*9IhFUPII3cos/32*84,3hBjsUSXI317系系总IIIIFFd4,32,11hFUPII3cos/12*92,1hFUPII3cos/32*84,3hBjsUSXI317系系总IIIIFFd4,32,11hFUPII3cos/12*92,10.1766064395.6543366266.713975262(6)求d2点短路电流简化电抗值:0.440000000.088791750.514603170.853.50计算电抗值:0.600.600.8515.486.812310XX7X9X579111XXXYYXC57CXX系104,3XXF92,1CXXF系jSXhFUPII3cos/32*84,3hBjsUSXI317系系总IIIIFFd4,32,115X2.0615739190.20额定电流值:3.231.29t=0s短路电流标幺值:5.530.5110.74kA7.15kAt=0.1s短路电流标幺值:4.050.5110.74kA5.24kA查表:水电站机电设计手册P99水轮发电机运算曲线数字表B1F1,22,1ScosP2XjSFXBjSFSXcosP2X3F3,443,112,1cos32eNFUPI*4,3FINjSFFXI2,1*2,111eBjs2,1*2,12,1U3S1系系外XIIIIINFFXFNFFII4,3*F3,44,3I134,3cos32eNFUPINFFII4,3*F3,44,3I*4,3FINjSFFXI2,1*2,11NjSFFXI2,1*2,111eBjs2,1*2,12,1U3S1系系外XIIIIINFFXFt=0.2s短路电流标幺值:3.860.5510.87kA4.99kAt=2s短路电流标幺值:3.380.5510.87kA4.37kAt=4s短路电流标幺值:3.230.5510.87kA4.18kANFFII4,3*F3,44,3INFFII4,3*F3,44,3INFFII4,3*F3,44,3I*4,3FI*4,3FI*4,3FINjSFFXI2,1*2,11NjSFFXI2,1*2,11Nj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