10KV系统短路电流整定计算表格VIP免费

序号电路元件计算公式1电网300100.333 2进线电缆YJV-3X30020.0790.143 0.477 19.218 209.80 48.91 30.634.50%0.0114 0.345 26.569 290.06 67.62 0.614 4YJV-3X700.80.0710.052 0.528 17.343 189.34 44.14 5YJV-3X1852.50.0630.143 0.620 14.786 161.42 37.63 60.254.50%0.0288 0.648 14.129 154.25 35.96 0.326 7YJV-3X700.80.0710.052 0.671 13.651 149.03 34.74 8YJV-3X1851.50.0630.086 Xjs3*=X1*+X2*+X8*0.562 16.289 177.82 41.46 90.54.50%0.0144 xjs4*=X1*+X2*+X8*+X9*0.577 15.882 173.38 40.42 0.367 10YJV-3X700.80.0710.052 0.614 14.922 162.90 37.98 17%0.037 10KV电网短路电流计算假定电网短路容量为300MVA,基准电压Uj=10KV,基准电流Ij=9.16KA,冲击系数Kch.s取1.8. 各元件有效电阻较小,短路电路中总电阻不大于总电抗的1/3,不予考虑.10KV|---2.0Km 3X300电缆------10KV变配电所SS2 |F1--------2.5Km 3X185电缆--------F4|SS1 10/0.4KV变压器|F5 b |---SS2 10/0.4KV变压器|F2 |---- 0.8Km 3X70电缆----10KV电机|F6 b |----1.5Km 3X70电缆----10KV电机|F3 b |----------1.5Km 3X185电缆--------F7|SS3 10/0.4KV变压器|F8 b |----1.0Km 3X70电缆----10KV电机|F9变压器/电网容量SrT/Sks MVA电缆长度Km变压器Uk%短路电路总电抗Xjs超瞬变短路电流KA 短路容量MVA短路全电流KA折算到高压侧的短路电流(KA)阻抗/Km短路元件电抗(标值)I"s=I0.2=Ik= Ij/Xjs*Ss"= Sj/Xjs*ich.s= 1.414*Kch.s*I"I1= I2/(1.732*nl)X1*=Sj/SksX2*=L*X(Sj/Uj^2)短路点F1SS2 10KV母线Xjs1*=X1*+X2*SS2变压器(基准电压10KV)X3*=(Uk%/100)*(Sj/SrT)*(0.4^2/10^2)短路点F2SS2变压器低压侧Xjs2*=X1*+X2*+X3*SS2-10KV电机X4*=L*X(Sj/Uj^2)短路点F3Xjs3*=X1*+X2*+X4*SS2-SS1电缆X5*=L*X(Sj/Uj^2)短路点F4SS1 10KV母线Xjs4*=X1*+X2*+X5*SS1变压器(基准电压10KV)X6*=(Uk%/100)*(Sj/SrT)*(0.4^2/10^2)短路点F5SS1变压器低压侧Xjs5*=X1*+X2*+X5*+X6*SS1-10KV电机X7*=L*X(Sj/Uj^2)短路点F6Xjs3*=X1*+X2*+X5*+X7*SS2-SS3电缆X8*=L*X(Sj/Uj^2)短路点F7SS3 10KV母线SS3变压器(基准电压10KV)X9*=(Uk%/100)*(Sj/SrT)*(0.4^2/10^2)短路点F8SS3变压器低压侧SS3-10KV电机X10*=L*X(Sj/Uj^2)短路点F9Xjs3*=X1*+X2*+X8*+X10*400kw 10KV电机X"d*=Xd"(Sj/Sed)KkKkKjxKhn11.051.110.851036.44.5 5.0 50.00 I...