Woodward GCP-30 Series User Manual

Manual 37365A GCP-30 Series Packages - Genset Control
Page 58/179 © Woodward
Single generator in mains parallel operation
The load-dependent start/stop function is enabled when all of the following conditions have been met:
• The control has been placed in the AUTOMATIC operation mode
• The mains interchange power control (import/export power) has been enabled by either the "Automatic 1" or
"Automatic 2" discrete inputs (terminals 3 or 5) and are configured for import or export operations
• One or both parameters "Load-dependent start/stop on terminal 3/5" (Parameter 95 or Parameter 96) has been
confi
gured to "ON".
Parameter 97
Minimum load
generator 0000kW
Load dependent start/stop: generator minimum power start set point 0 to 6,900 kW
For the mains interchange (import/export) real power control to function, a mini-
mum generator power set point value is required. In many cases, it is desirable that
the engine is prevented from starting unless the generator will operate at a specific
kW level or higher to ensure a reasonable degree of efficiency.
Example: The mains interchange must reach a level that will permit an 80kW gene-
rator to operate at a minimum load of 40kW prior to the engine starting.
Parameter 98
Add-on delay
mains oper. 000s
Load dependent start/stop: start delay 0 to 999 s
Load swings may exceed the "Minimum load generator" (Parameter 97) set point
momentarily. In order to prevent the engine from starting due to short-term load
swings, a delay time may be configured. The load must remain above the minimum
load set point without interruption for the delay time, configured in seconds, prior
to a start command being issued. If the load falls below the minimum load set point
before the delay time expires, the delay time is reset and a start command is not is-
sued.
Parameter 99
Shed-off delay
mains oper. 000s
Load dependent start/stop: stop delay 0 to 999 s
Load swings may fall below the "Hysteresis add on/off op." (Parameter 100) set
point momentarily. In order to prevent the engine from stopping due to short-term
load swings, a delay time may be configured. The load must remain below the hys-
teresis set point without interruption for the delay time, configured in seconds, prior
to a stop command being issued. If the load exceeds the hysteresis set point before
the delay time expires, the delay time is reset and a stop command is not issued.
Stopping hysteresis
NOTE
Parameter 100 is used to determine the stopping hysteresis for a single generator in a mains parallel
operation and multiple paralleled generators in an isolated operation.
Parameter 100
Hysteresis add-.
on/off op.0000kW
Load dependent start/stop: stopping hysteresis 0 to 9,999 kW
The shutdown power limit of the generator is determined via a hysteresis. The hys-
teresis is used to prevent the engine continuously starting and shutting down due to
minor load swings. The hysteresis should be configured so that the system has time
to bring an additional generator online during the largest possible load swing that
the plant may experience.

Woodward GCP-30 Series Specifications

General

Brand	Woodward
Model	GCP-30 Series
Category	Controller
Language	English