1. Island Frequency Controller
CFC | AGC - Setpoint 80
100 60 40 20
61.50
57.50
61.00
60.50
60.00
59.50
59.00
58.500
58.00
57.00
75 MW Unit #1 (CFC)
75 MW Unit #2 (Base Load)
60 Hz
59.8 Hz 38 28 27
CFC Unit Pulses
To Target of
60Hz
Base Unit Pulses
To AGC Target Setpoint 33 32
Adding 20 MW load
GOV-FF (Xcel)
Add 10 MW of Load
Total load initially = 55 MW
Total load increased to 65 MW

2. Cold Load Pickup
100 90 80
If modeled load = 10 MW and desired load is 5 MW, then taking into account
Cold Load pickup, anticipated load is 20 MW (double the modeled load value).
Therefore in order to pickup 5 MW I have to scale my load to half of that or 2.5 MW. 70 60
Load 50 40 30 20 10
Time