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Electric Power Generation
Installation and maintenance
5747 en - 2018.10 / a
Dual plate D700
22
4.3.4.4. Reactive reverse power fault
The reactive reverse power fault on the machine is monitored throughout operation.
•
If this fault is detected on the "active" AVR and not on the "online" AVR, the active AVR switches to
fault mode.
•
If this fault is detected for both the "active" and "online" AVRs, then switching does not occur (that may
then come from a fault in the link to the exciter).
Note: By default, no action has been programmed for reactive reverse power. A significant bump
may therefore occur on switching to the "online" AVR. This bump may be less noticeable if the
"field current before fault" action has been selected.
Start
AVR 1 = active
AVR 2 = online
Reactive
reverse power fault
on AVR 1?
Reactive
reverse power fault
on AVR 2?
Yes
Yes
No
No
No switching: loss of
sensing signalled
by the AVRs
(if programmed)
Switching:
AVR 1 = fault
AVR 2 = active
Loss of sensing on AVR 2?
Yes
No
Loss of sensing
signalled by the AVR
(if programmed)
No switching