Deif Multi-line 2 User Manual

AGC Designer’s Reference Handbook
DEIF A/S Page 135 of 168
It is obvious that this type of synchronisation is able to synchronise relatively fast because of the
adjusted minimum and maximum slip frequencies. This actually means that when the unit is aiming
to control the frequency towards its setpoint, then synchronising can still occur as long as the
frequency is within the limits of the slip frequency adjustments.
Static synchronisation
In static synchronisation the synchronising gen-set is running very close to the same speed as the
generator on the busbar. The aim is to let them run at exactly the same speed and with the phase
angles between the three-phase system of the generator and the three-phase system of the busbar
matching exactly.
The static principle is illustrated below.
L1
GB
GB
Load
Synchronised
L1
L1 L1L1L1
L1
L1
L2
L2
L2
L2 L2L2L2 L3 L3L3L3
L3 L3
L3
L3
t [s]
20°
10°
0°
Angle
L1
gen
/L1
bus
[deg]
Synchronising generator Generator on load
Synchronisation principle - static synchronisation
1500.3 RPM
50.01 Hertz
Speed:
1500 RPM
50.00 Hertz
Speed:
α
α
α
L2
Dynamic synchronisation is recommended where fast synchronisation is
required, and where the incoming gen-sets are able to take load just after the
breaker has been closed.
It is not recommended to use the static synchronisation principle when relay
regulation outputs are used. This is due to the slower nature of the regulation
with relay outputs.

Deif Multi-line 2 Specifications

General

Brand	Deif
Model	Multi-line 2
Category	Controller
Language	English