Woodward GCP-30 Series Configuration

Manual 37278B GCP-30 Series - Genset Control
Page 60/174 © Woodward
General
Case 7: Start of the engine
If [P
GN.actual.tot
+ P
reserve.isolated
+ > P
rated.tot
] the engine is started. (f)
Case 8: Stop of the engine
If [P
GN.actual.tot
+ P
reserve.isolated
+ P
hyst
+ P
rated
+ < P
rated.tot
] the engine is stopped. (g)
Example
Two generators in an isolated operation are used in parallel with other generators. One generator should always
be in operation.
P
rated
= 200 kW Rated real power of a genset.
P
Reserve.isolated
= 60 kW
P
hyst
= 30 kW
Case 8:
Generator real power, at which the second engine is started:
P
GN.actual
> P
rated.tot
- P
reserve.isolated
.
P
GN.actual
> 200 kW - 60 kW = 140 kW.
If the generator real power exceeds 140 kW negative deviation from the pre-specified minimum reserve
power occurs. As a result of this, the next engine is started.
Case 9:
Generator real power, at which the second engine is stopped:
P
GN.actual.tot
< P
rated.tot
- P
reserve.isolated
- P
rated
- P
hyst
.
P
GN.actual.tot
< 400 kW - 60 kW - 200 kW - 30 kW = 110 kW.
P
GN.actual
< P
GN.actual.tot
/ No. GCB = 110 kW / 2 = 55 kW.
If, in the case of outgoing isolated load, the total actual generator real power is reduced to such an extent
that one generator is enough to ensure the reserve power, the second engine is stopped.
Stop Of The Engine At Mains Failure [GCP-31]
Parameter 119
Mains error -
stop eng. ON
Engine stop at mains failure ON/OFF
ON ................ If the mains fail for at least the time of the mains settling time (Para-
meter 165) and the discrete input "Enable MCB" (terminal 53) is
enabled (the mains parallel operation is enabled), the engine is
stopped. When the mains returns and the mains settling time (Para-
m
eter 220) has expired, the engine is started and the GCB is syn-
chronized.
OFF .............. If the mains fail for at least the time of the emergency power start de-
lay (Parameter 165) and the discrete input "Enable MCB" (termin-
al 5
3) is enabled (the mains parallel operation is enabled), the GCB is
opened. The engine will continue running in idle mode. When the
mains returns and the mains settling time (Parameter 220) has ex-
pi
red, the GCB is synchronized.

Woodward GCP-30 Series Specifications

General

Brand	Woodward
Model	GCP-30 Series
Category	Controller
Language	English