H - Electricity – 02 – M
Patent
H - Electricity
02
M
342/20
H02M 1/12 (2006.01) H02J 3/24 (2006.01) H02J 3/36 (2006.01) H02M 5/45 (2006.01)
Patent
CA 1285047
ABSTRACT OF THE DISCLOSURE An apparatus for stabilizing turbine generator shaft torsional oscillations including: a current detector for detecting ac current of a turbine generator used in combination with a dc power-transmission system, a filter to which an output of said current detector is delivered, the filter comprising a first bandpass filter for detecting a super synchronous component (fl + fm) and a second bandpass filter for detecting a sub synchronous component (fl - fm) where a fundamental frequency of the generator is represented by fl and a natural frequency of the mechanical shaft system of the generator is represented by fm, a calculation circuit for applying conversion of at least one of d and q axis to respective outputs from the first and second bandpass filters using a generator phase .theta.G to take out at least one of .DELTA.id and .DELTA.iq of the sub and super synchronous components, a third bandpass filter to which an output from the calculation circuit is fed, the third bandpass filter for taking out a stabilization signal therefrom, and a circuit for controlling a converter for delivering an output of the generator to the dc power-transmission system on the basis of the stabilization signal.
530897
Kurita Atsushi
Mase Akira
Fetherstonhaugh & Co.
Kabushiki Kaisha Toshiba
Kurita Atsushi
Mase Akira
LandOfFree
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