Woodward 2301D, Инструкция по установке и эксплуатации, Страница: 68 / 130

2301D/2301D-EC Digital Control Manual 26247
60 Woodward
W**LOADPULSE SETTINGS**
To enable the Loadpulse, the kW calibration should be OK since the logic uses
the load change as a parameter.
The Loadpulse logic has been tested in August 2002 on a DG-set with a W200
engine. Activating the loadpulse logic did not result in significant improvement of
load-acceptance. There was improvement on the load-rejection tests.
01 ENABLE LOADPULSE dflt = FALSE (TRUE, FALSE)
This parameter enables (TRUE) or disables (FALSE) the Loadpulse logic.
The Loadpulse logic measures how fast the engine load changes in time. When
a large increase in engine load is detected, the speed reference is increased
momentarily to compensate for a drop in speed.
If a large decrease in engine load is detected, the speed reference is decreased
momentarily to compensate for a large speed overshoot.
02 SCALE LOADPULSE dflt = 1.000 (0.01, 10.00)
This allows for scaling of the kW signal.
03 LOW LVL ON dflt = -50.000 (-10000.00, 10000.00)
This represents the level (of change in engine load) at which the Loadpulse logic
is activated, for large load rejections. When this level is reached, then value
entered In SUBTR FRM SP is subtracted from the speed reference (or actuator
output).
04 HI LVL ON dflt = 50.000 (-10000.00, 10000.00)
This represents the level (of change in engine load) at which the Loadpulse logic
is activated, for large load acceptances. When this level is reached, then value
entered In ADD TO SP is added to the speed reference (or actuator output).
05 OFFSET dflt = 0.000 (-100.00, 100.00)
This represents the value to which the SUBTR FRM SP or ADD TO SP will
return. Normally, this value should be set at 0.0.
06 RATE TO SP dflt = 10.000 (0.00, 100.00)
This determines how fast (in rpm/s for speed reference, or actuator %/s) the
value entered in OFFSET is reached, from value entered in ADD TO SP or
SUBTR FRM SP.
07 SUBTR FRM SP dflt = -50.000 (-100.00, 100.00)
This represents the value that is subtracted from the current speed reference, or
from the actuator output in case of a large load rejection. This step is momentary
and will return to the value entered in OFFSET. The rate with which this happens
can be modified in RATE TO SP.
08 ADD TO SP dflt = 50.000 (-100.00, 100.00)
This represents the value added to the current speed reference, or from the
actuator output if a large load acceptance occurs. This step is momentary, and
returns to the value entered in OFFSET. The rate at which this occurs can be
modified in RATE TO SP. See Figure 3-9.