Question

For the system shown in Figure 2, draw an impedance diagram in per unit by choosing 30 MVA to be the base power and 6.6 kV as the base voltage for the circuit of generator G1. The data are given as follows: Generator G1: 25 MVA, 6.6 kV, X = 0.20 pu Generator G2: 15 MVA, 6.6 kV, X = 0.15 pu Generator G2: 30 MVA, 13.2 kV, X = 0.15 pu Transformer T1: 30 MVA, 6.6?/115Y kV, X = 0.10 pu Transformer T2: 15 MVA, 6.6?/115Y kV, X = 0.10 pu Transformer T3: Single-phase units each rated 10 MVA, 6.9/69 kV, X = 0.10 pu

          For the system shown in Figure 2, draw an impedance diagram in per unit by choosing 30 MVA to be the base power and 6.6 kV as the base voltage for the circuit of generator G1. The data are given as follows:
Generator G1: 25 MVA, 6.6 kV, X = 0.20 pu
Generator G2: 15 MVA, 6.6 kV, X = 0.15 pu
Generator G2: 30 MVA, 13.2 kV, X = 0.15 pu
Transformer T1: 30 MVA, 6.6?/115Y kV, X = 0.10 pu
Transformer T2: 15 MVA, 6.6?/115Y kV, X = 0.10 pu
Transformer T3: Single-phase units each rated 10 MVA, 6.9/69 kV, X = 0.10 pu

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For the system shown in Figure 2, draw an impedance diagram in per unit by choosing 30 MVA to be the base power and 6.6 kV as the base voltage for the circuit of generator G1. The data are given as follows:
Generator G1: 25 MVA, 6.6 kV, X = 0.20 pu
Generator G2: 15 MVA, 6.6 kV, X = 0.15 pu
Generator G2: 30 MVA, 13.2 kV, X = 0.15 pu
Transformer T1: 30 MVA, 6.6?/115Y kV, X = 0.10 pu
Transformer T2: 15 MVA, 6.6?/115Y kV, X = 0.10 pu
Transformer T3: Single-phase units each rated 10 MVA, 6.9/69 kV, X = 0.10 pu

Added by Marcos F.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Sri K

08/23/2023

Step 1

For Generator G1, the base power and voltage are already the same as the ones we have chosen, so we don't need to do any conversion. The impedance of G1 is 0.20 pu. For Generator G2, the base power is different, so we need to convert the impedance to the new Show more…

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For the system shown in Figure 2, draw an impedance diagram in per unit by choosing 30 MVA to be the base power and 6.6 kV as the base voltage for the circuit of generator G1. The data are given as follows: Generator G1: 25 MVA, 6.6 kV, X = 0.20 pu Generator G2: 15 MVA, 6.6 kV, X = 0.15 pu Generator G3: 30 MVA, 13.2 kV, X = 0.15 pu Transformer T1: 30 MVA, 6.6/115 kV, X = 0.10 pu Transformer T2: 15 MVA, 6.6/115 kV, X = 0.10 pu Transformer T3: Single-phase units each rated 10 MVA, 6.9/69 kV, X = 0.10 pu

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