Suppose that you are given a single area with three generating units as shown in Figure.
Three-generator system:-
| Unit |
Rating (MVA) |
Speed Droop R(Per Unit on Unit Base)
|
|
1
|
100
|
0.01
|
|
2
|
500
|
0.015
|
|
3
|
500
|
0.015
|
The units are initially loaded as follows:
P1 = 80 MW
P2 = 300 MW
P3 = 400 MW
Assume D=0; what is the new generation on each unit for a 50-MW load increase? Repeat with D=1.0 pu (i.e., 1.0 pu on load base). Be careful to convert all quantities to a common base when solving.