毕业设计（论文）
△/Y变换：
图5-5 110kV侧短路的等值电路图
Y/△变换：
图5-6 110kV侧短路的等值电路图
则有：
图5-7 110kV侧短路的等值电路图
*XJS1?X1SN1200?0.384??0.768 UB100SN21200?0.2679??1.5348 UB100*XJS2?X2***查计算曲线数字表可得：I1?0??1.360，I1?1??1.284，I1?2??1.464 ***I2?0??0.70，I2?1??0.671，I2?2??0.671
换算成有名值为：
I?0??I1*(0)?I?1??I1*(1)?SN13UAvSN13UAv*?I2(0)?SN23UAvSN23UAv?1.360?2003?115?0.7?12003?115?5.5827KA
*?I2(1)??1.284?2001200?0.671??5.3317KA 3?1153?115I?2??I1*(2)?SN13UAv*?I2(2)?SN23UAv?1.464?2003?115?0.671?12003?115?5.5124KA
25
毕业设计（论文）
Ich?2.55I(0)?2.55?5.5827?14.2359KA 5.4.2 35kv侧母线短路计算
图5-8 35kV侧短路的等值电路图
图5-9 35kV侧短路的等值电路图
Y/△变换：
图5-10 35kV侧短路的等值电路图
26
毕业设计（论文）
图5-11 35kV侧短路的等值电路图
*XJS1?X1SN1200?0.9074??1.8148 UB100SN21200?0.6329??7.5948>3.45 UB100*XJS2?X2***查计算曲线数字表可得：I1?0??0.5653，I1?0.5??0.5793，I1?1??0.5793
换算成有名值为：
I?0??I1*(0)?I?0.5??I1*(0.5)?SN13UAvSN1*?I2(0)?SN23UAvSN2?0.5653?2003?37?11200??4.2297KA7.59483?373UAv*?I2(0.5)?3UAv?0.5793?20011200???4.2734KA3?377.59483?37I?1??I1*(2)?SN13UAv*?I2(1)?SN23UAv?0.5793?20011200???4.2734KA7.59483?373?37Ich?2.55I(0)?2.55?4.2297?10.7857KA 5.4.3 10kv侧母线短路计算
图5-12 10kV侧短路的等值电路图
27
毕业设计（论文）
图5-13 10kV侧短路的等值电路图
Y/△变换：
图5-14 10kV侧短路的等值电路图
图5-15 10kV侧短路的等值电路图
*XJS1?X1SN1200?1.2359??2.4718 UB100SN21200?0.8620??10.344>3.45 UB100*XJS2?X2***查计算曲线数字表可得：I1，I1?0??0.4135，I1?0.5??0.4151?1??0.4151
换算成有名值为：
I?0??I1*(0)?I?0.5??I1*(0.5)?SN13UAvSN1*?I2(0)?SN23UAvSN2?0.4135?11200??10.926KA10.3443?10.53?10.5?20011200???10.9437KA3?3710.3443?372003UAv*?I2(0.5)?3UAv?0.4151?I?1??I1*(1)?SN13UAv*?I2(1)?SN23UAv?0.4151?20011200???10.9437KA10.3443?373?37 28
毕业设计（论文）
Ich?2.55I(0)?2.55?10.926?27.8613KA
29
变电站毕业论文设计
