Deif AGC-4 Mk II Designers Handbook

INFO
Dynamic synchronisation is recommended where fast synchronisation is required, and where the incoming gensets are
able to take load just after the breaker has been closed.
INFO
Static and dynamic synchronisation can be switched by using M-Logic.
5.3 Static synchronisation
In static synchronisation, the synchronising genset 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.
INFO
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.
The static principle is illustrated below.
Synchronised
t [s]
20°
10°
0°
Angle
L1
gen
/L1
bus
[deg]
Synchronisation principle – static synchronisation
Speed:
1500.3 RPM
50.01 Hertz
Speed:
1500 RPM
50.00 Hertz
LOAD
G
GB
G
GB
L1
L2L3
L1
L2L3
L1
L2L3
L1
L2L3
Generator on loadSynchronising generator
L1
L2L3
α
L3
L1
L2
α
L3
L1
L2
α
L3
L1
L2
30°
5.3.1 Phase controller
When the static synchronisation is used and the synchronising is activated, the frequency controller will bring the genset frequency
towards the busbar frequency. When the genset frequency is within 50 mHz of the busbar frequency, the phase controller takes
over. This controller uses the angle difference between the generator system and the busbar system as the controlling parameter.
This is illustrated in the example above where the phase controller brings the phase angle from 30 deg. to 0 deg.
DESIGNER'S HANDBOOK 4189341275A EN Page 88 of 196

Deif AGC-4 Mk II Specifications

General

Brand	Deif
Model	AGC-4 Mk II
Category	Controller
Language	English