Woodward GCP-30 Series User Manual

Manual 37365A GCP-30 Series Packages - Genset Control
Page 64/179 © Woodward
Isolated operation in parallel with other generators
The load-dependent start/stop functionality is enabled when the following conditions have been met for all con-
trols:
• 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
• All parameters, such as start power (Parameter 97), stop power (Parameter 100), start delay (Parameter 98),
st
op delay (Parameter 99), and the frequency set point value (Parameter 8) are configured identically for all
g
enerators that will be load sharing
• One or both parameters "Load-dependent stop/start on terminal 3/5" (Parameter 95 and/or Parameter 96) has
been confi
gured to "ON"
• The parameters "Load sharing" (Parameter 90) and/or "var sharing" (Parameter 92) have been configured to
"ON"
• All generators are configured for the same rated power (Parameter 21)
NOTE
In order to prevent a generator from becoming overloaded, ensure that the value configured for the re-
serve power (Parameter 103) is larger than the largest load sw
ing any one generator might endure
while an additional generator is brought online.
Parameter 103
Reserve power
isol.op. 0000kW
Load dependent start/stop: reserve power (isolated operation) 0 to 9,999 kW
The value configured for the reserve power determines when an additional genera-
tor will be started. The reserve power is the desired spinning reserve of a generator
or generators. The reserve power is usually estimated as the largest load swing that
a power plant may encounter during the time it takes to bring an additional genera-
tor online. The available generator power is calculated by multiplying the number
of generators with closed GCBs by the generator real power rating of a generator.
The reserve generator power is calculated by subtracting the power currently being
produced by all generators with closed GCBs from the total available generator
power. If the actual reserve power of the generators is less than the value confi-
gured in this parameter, the next generator will be started.
Currently available total generator rated real power
- Currently available total generator actual real power
= Reserve power
Parameter 104
Add-on delay
isol.op. 000s
Load dependent start/stop: start delay (isolated operation) 0 to 999 s
Load swings may exceed the "Reserve power isol. op." (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 reserve
power set point without interruption for the delay time, configured in seconds, prior
to a start command being issued. If the load falls below the reserve power set point
before the delay time expires, the delay time is reset and a start command is not is-
sued.
Parameter 105
Shed-off delay
isol.op. 000s
Load dependent start/stop: stop delay (isolated operation) 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.

Woodward GCP-30 Series Specifications

General

Brand	Woodward
Model	GCP-30 Series
Category	Controller
Language	English