Patent ID: 6768277
Filing Date: 2004-07-27
Classification: F02C,F05D,H02P

Abstract:
A gas turbine system including: first power conversion means for converting an AC voltage of a power system to a DC voltage; second power conversion means for converting the DC voltage output from said first power conversion means into an AC voltage; a generator connected to an AC output side of said second power conversion means and driven and rotated by a gas turbine; and turbine control means for outputting a revolution speed command value depending upon a fuel flow rate of said gas turbine, said gas turbine system comprising:revolution speed detection means for detecting a revolution speed of said generator; DC voltage detection means for detecting a voltage of a DC side of said first power conversion means; DC voltage command value generation means for generating a DC voltage command value in accordance with a difference between the revolution speed detected by said revolution speed detection means and the revolution speed command value output by said turbine control means; DC voltage command value selection means for selecting either a preset DC voltage command value or the DC voltage command value generated by said DC voltage command value generation means in accordance with the revolution speed detected by said DC voltage detection means; and first control means for controlling a conversion output of said first power conversion means in accordance with a control signal for making the DC voltage detected by said DC voltage detection means coincide with the DC voltage command value selected by said DC voltage command value selection means.