HGM8151 Genset Parallel Controller User Manual Page 47 of 66
10.4
STEP 4: AUTOMATIC PARALLEL OPERATION
When the controller is in auto status, if digital in
put “remote start
on-load (on demand)
” is active,
it will
carry out automatic parallel, start and stop operation. There are 3 ways of automatic parallel operation:
1)
Start on demand: the module with the highest priority starts firstly. When load exceeds the pre-set
start maximum percentage, the second according to the priority module will start the gen-set,
synchronize and share load. When load falls lower than the preset minimum stop percentage, after
stop delay the second module breaker will be open and the module will be cooled down and
stopped.
2)
Start all sets initially: all the modules start at the same time; the first module to reach load
condition closes first; when other modules reach load condition, they synchronize one by one. After
that the modules monitors the load. If load value falls below module pre-set shutdown minimum
percentage, the module with lowest priority enters stop delay and then cools down and stops. If
load exceeds the preset start maximum percentage, the generators that are at rest will all start
again.
3)
Balanced engine running time: Engine with the lowest total run time starts first. When the running
gen-set total run time exceeds the other gen-set balanced running time, then the gen-set with the
next lowest total run time starts (both
“
start on demand
”
or
“
start all sets initially
”
modes are
possible); other gen-sets enter parallel operation after synchronizing. Opening breaker, unloading
and stop is performed automatically. All the gen-sets are repeatedly started and stopped according
to their total run time.
