4.7.2 Signal length
The signal length is calculated compared to the adjusted period time. In the drawing below the effect of the proportional regulator is
shown.
P-regulator
Output (%)
100
80
60
40
20
0
0 10 20 30 40 50 60
Kp
4 % 2 %
1 %
0.5 %
In this example we have a 2 percent regulation deviation and an adjusted value of the Kp = 20. The calculated regulator value of the
controller is 4 0%. Now the pulse length can be calculated with a period time = 2500 ms:
e(deviation) / 100 x t(period)
40 / 100 x 2500 = 1000 ms
The length of the period time will never be shorter than the adjusted ON time.
4.8 Droop mode
4.8.1 Principle and setup
Droop mode can be used when a new genset is installed together with existing gensets which operate in droop mode in order to
make equal load sharing with the existing gensets. This regulation mode can be used where it is required/allowed that the generator
frequency drops with increasing load.
The droop mode parameters can be adjusted between 0-10% droop. If the value is different from 0%, the droop percentage will be
applied on top of the regulation output of the governor (f) or AVR (U).
Droop regulation parameters
Parameter
Name Description
2514 f droop Droop setting for frequency regulator with analogue output
2573 f droop relay Droop setting for frequency regulator with relay regulation
2644 U droop Droop setting for voltage regulator with analogue output
2693 U droop relay Droop setting for voltage regulator with relay regulation
INFO
When using droop mode, the frequency PID (f) and voltage PID (U) is active. If option M12 is present, you must inhibit
analogue load sharing.
DESIGNER'S HANDBOOK 4189341275A EN Page 82 of 196
To Next Page
Loading...
Need help?
General
