Frequency Control - Woodward easYgen-2000 Series User Manual

4.5.12.1

Frequency Control

Notes on kick impulse function
ID Parameter
5507 Frequency
control
5510 Proportional
gain
5511 Integral gain
37535B
Configure Application > Configure Controller > Frequency Control
Frequency control provides a kick impulse function, which issues a
pulse if the frequency control deadband (param‐
eter 5550 Ä p.
be performed for 20 seconds. The function is enabled, if a synchro‐
nization is carried out.
If the phase angle is between 0° and 180°, a "frequency lower"
n
signal is issued.
If the phase angle is between 180° and 360°, a "frequency
n
raise" signal is issued.
The pulse duration is 100ms. If the synchronization still fails,
another pulse will be issued after 10 seconds.
The following conditions are required for the kick impulse function:
Frequency control (parameter
n
"3pos controller"
Synchronization mode (parameter
n
ured to "RUN" or "CHECK" (or "Controlled by LM" and RUN or
CHECK enabled by the LogicsManager)
CL Setting range Description
[Default]
2 [PID analog] The frequency is controlled using an analog PID controller.
3pos controller The frequency is controlled using a three-step controller.
Off Frequency control is not carried out.
2 0.01 to 100.00 The proportional coefficient specifies the gain. By increasing the gain, the
response is increased to permit larger corrections to the variable to be con‐
[1.00]
trolled.
The farther outside tolerances the process is, the larger the response action
is to return the process to the tolerance band.
Notes
If the gain is configured too high, the result is excessive overshoot/undershoot
of the desired value.
This parameter is only visible if frequency control (parameter
is configured to "PID analog".
2 0.01 to 100.00 The integral gain identifies the I part of the PID controller.
[1.00] The integral gain corrects for any offset (between setpoint and process vari‐
able) automatically over time by shifting the proportioning band. Reset auto‐
matically changes the output requirements until the process variable and the
setpoint are the same.
This parameter permits the user to adjust how quickly the reset attempts to
correct for any offset.
Notes
The integral gain constant must be greater than the derivative time constant.
If the integral gain constant is too large, the engine will continually oscillate.
If the integral gain constant is too small, the engine will take too long to settle
at a steady state.
This parameter is only visible if frequency control (parameter
is configured to "PID analog".
easYgen-2200/2500 | Genset Control
272) is not exceeded and no synchronization could
5507 Ä p.
5728 Ä p.
Configuration
271) is configured to
207) is config‐
5507 Ä p. 271)
5507 Ä p. 271)
271