User:Викидим/Zero power factor curve

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The zero power factor curve (also zero power factor characteristic, ZPF) of a synchronous generator is a plot of the output voltage as a function of the excitation current or field using a zero power factor (purely inductive) load that corresponds to rated voltage at rated current (1 p.u.). The curve is typically plotted alongside the open-circuit characteristic.

The zero power characteristic is similar to the open-circuit characteristic but shifted down by $\alpha$ .

The curve is obtained by rotating the generator at the rated RPM with the output terminals connected to the unity load, varying the excitation field and recording the output voltage.

References

Sources

v t e Characteristics of synchronous machines
Capability curve Open-circuit saturation curve Reactances Short circuit ratio Synchronous impedance curve Zero power factor curve V curve

Category:Electrical generators

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