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Excitation control apparatus for a generator

  • US 4,245,182 A
  • Filed: 03/28/1978
  • Issued: 01/13/1981
  • Est. Priority Date: 03/30/1977
  • Status: Expired due to Term
First Claim
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1. An excitation control apparatus for a generator having a terminal voltage regulating means for regulating a field current of the generator in accordance with a differential signal between a terminal voltage signal of the generator and a reference voltage signal, comprising:

  • detector means for detecting and providing outputs of a signal indicative of an active power component at an output of said generator and a signal indicative of a reactive power component thereof;

    scalar operation means coupled to said detector means for carrying out a scalar operation in accordance with predetermined functions relative to the active and reactive power components, said scalar operation means including at least one of a means for computing a compensation value for a line drop voltage on the output side of said generator, a means for computing an under-excitation limiting value for said generator, a means for computing a regulation value for maintaining a constant power factor operation of said generator, a means for computing an overcurrent compensation value for an armature winding of said generator and a means for computing a cross-current compensation value for a cross-current between said generator and an additional generator connected in parallel thereto, at least one of said compensation/control value computing means being responsive to the common outputs from said detector means for carrying out the scalar operation in accordance with the corresponding specified function; and

    means for adding said compensation/control values from the output of said scalar operation means to the differential output from said terminal voltage regulating means.

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