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The first part: (0-150)kW. SG and DG share the power;
The second part: (150-850)kW, DG on-load is 50Kw(10%), the rest is loaded with SG;
The third part: (850-1200)kW, SG on-load is 800kW(80%), the rest is loaded with DG;
The fourth part: (1200-1300) kW, SG on load is 400kW(80%), the rest is loaded with SG;
The fifth part: (1300-1500)kW, SG on-load is 900kW(90%)+sharing excess power ( total load-1300 kW), DG
on-load is 400kW(90%)+sharing excess power ( total power-1300kW).
NOTE: If the fixed min on-load percentage is set to 0, DG will start with load only when SG on-load exceeds
the fixed power percentage.
10.3
SYNCHRONISING
HMC6 controller adopts dynamic synchronizing because of its fast speed to close breakers. It is with
0.1Hz slip frequency, synchronizing can be finished in 10s and ramp on load immediately once generator
closed.
During dynamic synchronizing, the unit which is going to synchronized is running at a different speed to
busbar generator, and the speed difference between them is named as slip frequency. Generally, the
synchronizing unit is running at a positive slip frequency which means it is relatively faster than busbar
generator, so that the generator reverse power is avoided after synchronizing.
The aim of synchronization is reduce the phase angle between two systems (refer to 3-phase systems of
generator and busbar).
Voltage difference, frequency difference and angle difference should be set during dynamic synchronizing.
The breaker is going to closed if all of them meet the requirement.
10.4
HEAVY CONSUMERS
Each HMC6 controller is able to handle four Heavy Consumers (HC). Response priority for the same
controller is HC1>HC2>HC3>HC4; while for the different controllers, controller's ID determines HC request's
priority, which means first response to HC request from controller with small ID number.
When a heavy consumer is requested, the function for conditional connection of heavy consumers reserves
the programmed HC requested value on the busbar, until sufficient predicted available power is present at the
busbar.
10.4.1
HEAVY CONSUMER REQUESTS
Heavy consumer equipment should send a heavy consumer request before starting up. Only binary
input can be handled by HMC6 and the request value must be fixed load value. Each heavy consumer
request can set a corresponding request power value and rated power value.
10.4.2
HEAVY CONSUMER RESPONSE
If a heavy consumer is requested, the controller calculates the power needed according to the
requested value of heavy consumer power. If the request is not satisfied, the controller will start the
corresponding standby units, if satisfied, the controller will not reserve any power after the heavy consumer
feedback is effective.
Example：
HMC6 Power Management Controller User Manual
Page 36 of 87
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