Deif Multi-line 2 - Peak Shaving

AGC Designer’s Reference Handbook
DEIF A/S Page 15 of 168
Peak shaving
Auto mode description
The gen-set will start at a predefined mains import level and run at a fixed minimum load, e.g.
10%. When the mains import increases above the maximum mains import setpoint, the gen-set
will supply the extra load in order to maintain the mains import at the maximum import level.
When the load drops below the max. mains import setpoint, the gen-set will run at min. load
again. When the mains import decreases below the stop setpoint, the gen-set will cool down and
stop.
A 4-20mA transducer is used for indication of the power imported from the mains.
Diagram, peak shaving - example
Max. mains import level
Gen-set start level
Gen-set stop level
t
STOP
Gen-set minimum load
kW
Generator power
t
Mains power
Peak/total power