Dave, N3HE wrote:
"Picture an alternator delivering rated current into a resistance:---."
Reactive current adds to the total. It often comes from many lightly
loaded induction motors supplied by the power system.
Fortunately, the power factor of a synchronous motor can be varied over
a wide range by control of its excitation. Often, unloaded synchronous
motors are connected to a power system for the sole purpose of
controlling power factor. An unloaded synchronous motor can make a
really large variable capacitor.
Best regards, Richard Harrison, KB5WZI
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