Peak Shaving - Deif Multi-line 2 Designers Reference Handbook

AGC

Peak shaving

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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.
kW
Max. mains import level
Gen-set start level
Gen-set stop level
Gen-set minimum load
Diagram, peak shaving - example
DEIF A/S
Designer's Reference Handbook
Peak/total power
Mains power
Generator power
t
t
STOP
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