HPM6 Power Management Controller User Manual
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11.4.1
HEAVY CONSUMER REQUEST
Heavy load equipment should send a heavy consumer request before starting up. Each HC request
signal can set the corresponding inquiry power value and rated power value. HC signal is divided into
continuous signal and pulse signal. If bus still has no sufficient left available power for HC response
when HC request failure time is over, controller will send HC request failure alarm. If the inquiry signal is
pulse signal, this heavy consumer inquiry is over after request failure alarm is acknowledged.
11.4.2
HEAVY CONSUMER RESPONSE
If a heavy consumer is requested, the system 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 and the heavy consumer stability delays, then the response
signal will be initiated, heavy consumer response output delay ends, if the heavy consumer feedback
inactive system is only heavy consumer includes its rated power, and the controller does not reserve
any power after the heavy consumer feedback is active.
Example (three 100kW gensets):
1)
There is 60kW redundancy on bus which is composed by two 100kW parallel running gensets
with 140kW load, then the heavy consumer request 1 is active (request power is 70kW);
2)
An additional genset should be started if the power needed is insufficient;
3)
There is 160kW redundancy on bus after genset starting and in parallel, then the response
signal will be initiated.
11.4.3
HEAVY CONSUMER PERMISSION
If a heavy consumer is requested, the system 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 and the heavy consumer stability delays, then the heavy
consumer permission signal will be initiated and the signal is variable. If the current bus power is not
enough, the heavy consumer permission signal will not output.
11.4.4
HEAVY CONSUMER FEEDBACK
The feedback can be divided into digital signal and analog signal according to the type of heavy
consumer (fixed power and variable power), analog signal can be collected by analog input or HMP300
communication input. Heavy consumer feedback signal is sent to the controller after the requested
heavy consumer starts normally. If it is a fixed power one, the system will not reserve any power for the
heavy consumer after the controller receives the digital feedback signal. If it is a variable power one,
when the controller receives an analog feedback signal
≥
2% of the rated power of heavy consumer, it is
considered that the heavy consumer has been started, and the system reserves the remaining power of
the rated power of heavy consumer (rated power of heavy consumer - current power of heavy
consumer).
After heavy consumer is acknowledged, if HC feedback failure time is over, controller still not
receive the HC feedback signal, it will send HC feedback failure alarm
Digital feedback is shown in the figure below:
