P Load Sharing - Deif GPC-3 Designers Reference Handbook

GPC-3 DRH 4189340587 UK
Compensation for isochronous governors
When the genset is equipped with a governor that only provides isochronous operation, the droop in the
GPC-3 can be used to compensate for the missing droop setting possibility on the governor.
Dependency
Droop mode is active when:
Control inputs
Breaker feedbacks
Mode inputs
To activate the use of "Start sync./control" from M-Logic or external communication (for exam-
ple Modbus), the M-Logic command "Start sync./ctrl enable" must be activated. Alternatively,
you can use the functions "Remote GB ON" and "Remote GB OFF".
Regulator
The frequency controller is used in the GPC-3 when operating in frequency droop mode. This means that as
long as the power does not match the frequency, the governor will be controlled up- or downwards. In this
way, the power and the frequency will always end up matching each other according to the adjusted droop
curve.

3.6 P load sharing

This regulation mode is typically used when paralleling two or more gensets. During load sharing operation
with other gensets, the power and frequency of each individual genset can be changed. This means that if the
fuel supply is changed to the engine, the power of the genset – and subsequently the frequency – will
change.
Dependency
P load sharing mode is active when:
Control inputs
Breaker feedbacks
Mode inputs
DEIF A/S
Input
Start sync./control
De-load
CB open
CB closed
Frequency droop
Input
Start sync./control
De-load
GB open
GB closed
P load sharing
Functional descriptions
Active mode
Droop
25 ON
43 OFF
54 OFF
55 ON
User def. ON
Active mode
Load sharing
25 ON
43 OFF
26 OFF
27 ON
49 ON
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