• 10359 Setpoint uprating of power [kW]
•
Examples Power Derating
If the frequency increases the value F
Start
(Parameter
of the generator will be memorized by the controller as an internal value P
M
. (P
measured) and indicated at “4613 f dep. Derating P reference” [%]. Now, the power will
be derated with a gradient R [%/Hz](parameter
).
All examples are using the following values:
• P
rated
= 200 kW
•
• P
M
= 130 kW
•
• R = 40%/Hz (parameter
•
• F
Start
= 50.20 Hz (parameter
)
•
• F
Mains
= 50.50 Hz
•
The power derating ΔP may be calculated using the following formulas:
• ΔP
kW
= P
M
[kW] x R [%/Hz] x (FMains [Hz] - FStart [Hz]) / 100 [%]
•
• ΔP
%
= P
M
[%] x R [%/Hz] x (FMains [Hz] - FStart [Hz]) / 100 [%]
•
Example 1: Power derating with “5807 Up/derating based on" Actual power
• The power derating ΔP
kW
is calculated as follows:
•
◦ ΔP
kW
= 130 kW x 40 %/Hz x (50.50 Hz - 50.20 Hz] / 100% = 15.6 kW
◦
◦ “10358 Setpoint derating of power” indicates 114.4 kW (130 kW – 15.6 kW)
◦
• The power derating ΔP
%
is calculated as follows:
•
◦ ΔP
%
= 65 % x 40 %/Hz x (50.50 Hz - 50.20 Hz] / 100% = 7.8 %
◦
◦ “10341 Freq. dep. derating of power” and “05.28 P derating(f) [%]” indicates
◦
7.8 %
The derating becomes inactive, if the frequency becomes lower than F
Stop
(Parameter
) ). (If the frequency becomes too high, the frequency monitoring function trips.)
Example 2: Power derating with “5807 Up/derating based on" Rated power
• The power derating ΔP may be calculated using the following formulas: The power
•
derating ΔP
kW
is calculated as follows:
◦ ΔP
kW
= 200 kW x 40 %/Hz x (50.50 Hz - 50.20 Hz] / 100% = 24 kW
◦
◦ “10358 Setpoint derating of power” indicates 104 kW (130 kW – 24 kW).
◦
• The power derating ΔP
%
is calculated as follows:
•
◦ ΔP
[%]
= 100 % x 40 %/Hz x (50.50 Hz - 50.20 Hz] / 100 % = 12 %
◦
370
easYgen-3000XT Series
B37574
4 Configuration
4.4.4.5.5 Active Power – Frequency Function P(f)
Released