Marine Electrical Power Systems:
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System Voltage and Frequency Regulation Figures

Last Update: November 13, 2025

Figures created by Norbert Doerry for the System Voltage and Frequency Regulation Document




Generator set voltage and frequency regulation

Image (C) Copyright 2025 by Norbert Doerry – licensed via CC BY 4.0




Generic PID closed loop feedback control loop

Image (C) Copyright 2025 by Norbert Doerry – licensed via CC BY 4.0




Voltage droop based on reactive power

Image (C) Copyright 2025 by Norbert Doerry – licensed via CC BY 4.0




Droop characteristic - Voltage droop as a function of reactive power

Image (C) Copyright 2025 by Norbert Doerry – licensed via CC BY 4.0




Notional voltage regulation for generator set

Image (C) Copyright 2025 by Norbert Doerry – licensed via CC BY 4.0




Notional governor for generator set engine

Image (C) Copyright 2025 by Norbert Doerry – licensed via CC BY 4.0


CorelDraw File


(C) Copyright 2025 Norbert Doerry

This work by Norbert Doerry is licensed under CC BY 4.0

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