Three generating units within a power plant are synchronized and supplying power to the main grid. The table below shows the respective capacities, initial loading and %droop of each generator for a grid frequency of 60 Hz. Generator # G1 G2 G3 Speed Droop 3% 4% 5% Capacity (MW) 50 100 150 Total 300 MW Initial Loading (MW) 20 60 120 200 MW 6 1. What will be the output of G2 if the grid frequency drops by 0.3 Hz? 2. What will be the total output of the power plant if the grid frequency dropped from 60 Hz to 59.8 Hz? 3. What value of grid frequency will cause G1 output to increase from 20 MW at 60 Hz to 25 MW?

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Three generating units within a power plant are
synchronized and supplying power to the main grid. The
table below shows the respective capacities, initial
loading and %droop of each generator for a grid
frequency of 60 Hz.
Generator
#
G1
G2
G3
Speed
Droop
3%
4%
5%
Capacity
(MW)
50
100
150
Total 300 MW
Initial Loading
(MW)
20
60
120
200 MW
1. What will be the output of G2 if the grid frequency drops
by 0.3 Hz?
6
2. What will be the total output of the power plant if the grid
frequency dropped from 60 Hz
to 59.8 Hz?
3. What value of grid frequency will cause G1 output to
increase from 20 MW at 60 Hz to 25 MW?
4. What value of grid frequency will cause the total plant
output to decrease by 50 MW?
Transcribed Image Text:Three generating units within a power plant are synchronized and supplying power to the main grid. The table below shows the respective capacities, initial loading and %droop of each generator for a grid frequency of 60 Hz. Generator # G1 G2 G3 Speed Droop 3% 4% 5% Capacity (MW) 50 100 150 Total 300 MW Initial Loading (MW) 20 60 120 200 MW 1. What will be the output of G2 if the grid frequency drops by 0.3 Hz? 6 2. What will be the total output of the power plant if the grid frequency dropped from 60 Hz to 59.8 Hz? 3. What value of grid frequency will cause G1 output to increase from 20 MW at 60 Hz to 25 MW? 4. What value of grid frequency will cause the total plant output to decrease by 50 MW?
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