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Static and dynamic mains voltage support by a static power factor correction device having a self-commutated converter

  • US 6,025,701 A
  • Filed: 11/10/1997
  • Issued: 02/15/2000
  • Est. Priority Date: 05/09/1995
  • Status: Expired due to Term
First Claim
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1. A method for static and dynamic support of a mains voltage at a network node, which comprises:

  • providing a static power factor correction device with a transformer and a self-commutated converter with at least one capacitive energy store;

    continuously determining reference values as a function of deviations between a magnitude of a mains voltage space vector at the network node and a predetermined magnitude reference value of the mains voltage space vector;

    producing a phase angle as a function of deviations between an actual value and the reference values, the phase angle indicating an instantaneous phase shift of a generated voltage-space vector of the self-commutated converter with respect to a measured mains voltage space vector;

    determining from the phase angle an angular position of the mains voltage space vector of the self-commutated converter as a function of the angular position of the voltage space vector; and

    selecting, based on the angular position of the mains voltage space vector of the self-commutated converter, associated switching state signals for the self-commutated converter through predetermined optimized pulse patterns.

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