GE Industrial Solutions Galaxy Verification - Manual (Page 60)

Galaxy Power System Verification Procedures
3 - 16 Galaxy Millennium Controller Performance Verification Procedures Issue 3 January 2008
Energy Management
Overview The Energy Management algorithm matches the number and ampacities
of all available battery plant rectifiers to the actual plant load
requirements, favoring the shutdown of rectifiers when plant load
requirements are low enough to warrant selected rectifier shutdown,
thus maintaining the battery plant at maximum efficiency without
sacrificing reliability or creating nuisance alarms. The Galaxy controller
continuously monitors the number of connected rectifiers, their
individual ampacities, the actual output current being delivered by each
and the actual office load-current demand.
The Energy Management algorithm exercises all rectifiers on a monthly
basis, guaranteeing that every connected rectifier is operated for at least
24 hours each month. All connected rectifiers that have not operated a
total of 24 hours in the previous monthly cycle will be turned On by the
controller on the first Wednesday of the next month at 10:00 a.m. for 24
hours.
Energy Management is available only in the intelligent controller and
must be enabled in both hardware and software. Enable the hardware
switch by setting SW204-1 on the BSJ board to 1. From the front panel
follow the path:
→ CONFIG → RECT CTR → EFFIC to
enable the software switch. Energy Management can be enabled in
EasyView by following the path: CONFIGURE
→ PLANT →
HARDWARE AND SOFTWARE.
Procedure
Step Action
1 Reset the BSJ intelligent controller (Figure 3-1) and stabilize
the load at some level at which at least one rectifier becomes
unnecessary. After 10 minutes, the first unneeded rectifier
will be placed in standby by the controller. If additional
rectifiers can be shut down, they will follow individually at 10
minute intervals.
2 If the plant load can be varied, increase it to the point where
another rectifier is necessary after the controller has
completed its shutdowns. One (or more as required) of the
rectifiers will be restarted immediately when the load exceeds
the capacity of the current on-line rectifiers.
Note: If energy management is always enabled, it may not be required
to do this test, especially if some of the rectifiers are in “TR” mode.