Model of a mechanical grid equivalent
Primary control
Network Power-Frequency Characteristic

Self-regulation
Inductive loads like motors cause the system load to be slightly
frequency dependent.

- μ [%/Hz]
- The self regulation effect of the load P [%/Hz]
- ΔP' [MW]
- The change in the power consumption of the loads because of the
change in frequency Δf.
- P [MW]
- The value of the original load of the system plus the change ΔP
due to the change in frequency.
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