HGM9510 GENSET PARALLEL UNIT
HGM9510 Genset Parallel Unit ISSUE 2013-08-06 Version 1.1 Page 50 of 65
4) During manual parallel, perform impact load test and damp load test to check if there is power
oscillation.
11.4 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.
