In the system shown in Figure 1, the transformers are connected star-star with both star points grounded and the generators are connected instar with thier star points grounded. The system base is 15 MVA. The transformers all have reactances of 0.04 p.u. on this 15 MVA base. Thereactances of all other elements are given in Table 1 (in 2) and the voltage levels are given in Table 2.p.u.G1p.u.T1jöPer-UnitConvert all values to p.u. on a 15 MVA base.Xa=p.u.Xc₂=XL =V BABEG12X9T3Figure 1: A section of the distribution systemT1LTable 1: Sequence reactances (2)3G1 L G20.3 0.59 0.014L9/10 10Fault VoltageWhat is the voltage at bus 3 (in Volts) after the fault has occurred?Vp=VT25T23410/4Table 2: Voltage bases (kV)G24T310/9|G2Fault CurrentA three-phase fault with a fault reactance of 0.01 p.u. occurs at bus 3. Calculate the fault current flowing at the fault point in KA.Ip=-jKASo

It is given that: MVAbase=15XT1=XT2=XT3=0.04 pu

In the system shown in Figure 1, the transformers are connected star-star with both star points grounded and the generators are connected in star with thier star points grounded. The system base is 15 MVA. The transformers all have reactances of 0.04 p.u. on this 15 MVA base. The reactances of all other elements are given in Table 1 (in $2) and the voltage levels are given in Table 2. 2 T1 L 01/10 jä 3 T3 p.u. Per-Unit Convert all values to p.u. on a 15 MVA base. Xax= Xc₂= XL = p.u. p.u. G1 V BABE Figure 1: A section of the distribution system X G1 T1 G1 9/10 4 Table 1: Sequence reactances (12) 0.3 0.59 0.01 L G2 Fault Voltage What is the voltage at bus 3 (in Volts) after the fault has occurred? V T2 10 10/4 Table 2: Voltage bases (kV) T2 G2 T3 5 10/9 G2 Fault Current A three-phase fault with a fault reactance of 0.01 p.u. occurs at bus 3. Calculate the fault current flowing at the fault point in kA. IF=j KA Sc Unan

In the system shown in Figure 1, the transformers are connected star-star with both star points grounded and the generators are connected in star with thier star points grounded. The system base is 15 MVA. The transformers all have reactances of 0.04 p.u. on this 15 MVA base. The reactances of all other elements are given in Table 1 (in $2) and the voltage levels are given in Table 2. 2 T1 L 01/10 jä 3 T3 p.u. Per-Unit Convert all values to p.u. on a 15 MVA base. Xax= Xc₂= XL = p.u. p.u. G1 V BABE Figure 1: A section of the distribution system X G1 T1 G1 9/10 4 Table 1: Sequence reactances (12) 0.3 0.59 0.01 L G2 Fault Voltage What is the voltage at bus 3 (in Volts) after the fault has occurred? V T2 10 10/4 Table 2: Voltage bases (kV) T2 G2 T3 5 10/9 G2 Fault Current A three-phase fault with a fault reactance of 0.01 p.u. occurs at bus 3. Calculate the fault current flowing at the fault point in kA. IF=j KA Sc Unan

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter3: Power Transformers

Section: Chapter Questions

Problem 3.26P: A bank of three single-phase transformers, each rated 30MVA,38.1/3.81kV, are connected in Y- with a...

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