3.41 Consider the single-line diagram of the power system shown in Figure 3.36. Equip-

ment ratings are:

FIGURE 3.36

Problems 3.41 and 3.42

generator 1:

generator 2:

synchronous motor 3:

3-phase A-Y transformers

T₁, T2, T3, T4:

3-phase Y-Y transformer Ts: 1500 MVA, 500 kV Y/20 kV Y, X = 0.1

Neglecting resistance, transformer phase shift, and magnetizing reactance, draw the

equivalent reactance diagram. Use a base of 100 MVA and 500 kV for the 40-ohm

line. Determine the per-unit reactances.

1

8

T₁

T₂

10380

농어

750 MVA, 18 kV, X" = 0.2 per unit

750 MVA, 18 kV, X"=0.2

1500 MVA, 20 kV, X" = 0.2

750 MVA, 500 kV Y/20 kV A, X = 0.1

125 0

3

140 0

125

4 2

A

OBE

T₂

T₂

38CH

D

учини