北京交通大学 电力系统基础作业题

V[0]?1.0I[0]?1.0''0x?0.13cos?[0]?0.82

''dE?1?0.13?1?1?0.8?1.08如果发电机额定空载运行：

V[0]?1.0I[0]?0.0''0 本题取

x?0.13cos?[0]?0.82

''dE?1?0.13?0?1?0.8?1SB?100 MVA，VB?Vav，

SB100?x?0.14??0.2333 SN60''dxG*Vs%SB8100xT*????0.2667 100SN10030SB100xL*?xll2?0.38?20?2?0.5551 VB37x?*?0.2333?0.2667?0.5551?1.0551

E*''1.08I*''???1.0236 x?*1.055149/74

北京交通大学 电力系统基础作业题

起始暂态电流

100I''?II?1.0236??1.5972 kA

3?37''*B冲击电流

iim?kim2I''?1.8?2?1.5972?4.0658 kA

短路电流最大有效值

Iim?1?2(kim?1)?Ip

?1.52I''?1.52?1.5972?2.428''* kA

短路功率

St?ISB?1.0236?100?102.36 MVA

6-15．

解：取

SB?60MVA,VB?Vav

SB60?KA=3.299KA 则 IB?3?Vav3?10.5SB60????xS?xS?0.5??0.1 xG???xd???0.15SS300xT1?xT2Vs%?SB10.560?xT????0.105100STN1006050/74