Patent ID: 6056782
Filing Date: 2000-05-02
Classification: H02P

Abstract:
A synchronous machine simulator comprising:spiral conversion means, connected to a rotating synchronous electrical machine as an object of simulation for inputting a three phase voltage received through terminals of the synchronous machine, for performing an analog to digital conversion of real instantaneous values of the three phase voltage, and for converting the real instantaneous values of the three phase voltage into spiral vectors;voltage calculation means for performing a symmetrical component conversion of the spiral vectors to calculate a positive-sequence component voltage, a negative-sequence component voltage, and a zero-sequence component voltage, and for calculating an internal voltage of the synchronous machine using the positive-sequence component voltage and a phase angle of the synchronous machine;current calculation means for calculating a positive-sequence component current, a negative-sequence component current, and a zero-sequence component current using the positive-sequence component voltage, the negative-sequence component voltage, and the zero-sequence component voltage calculated by said voltage calculation means; andspiral inverse conversion means for calculating real instantaneous values of a three phase current in the synchronous machine by performing a symmetrical component conversion for the positive-sequence component current, the negative-sequence component current, and the zero-sequence component current calculated by said current calculation means, and for outputting the real instantaneous values of the three phase current, wherein said synchronous machine simulator simulates a backswing characteristic, an asymmetrical three phase characteristic, instantaneous transient current, instantaneous transient voltage, instantaneous active electric power, instantaneous reactive electric power, instantaneous electrical system torque, instantaneous mechanical system torque, system shaft torque, phase angle, and exciting voltage based on the values calculated by said spiral inverse conversion means, said spiral conversion means, said voltage calculation means, and said current calculation means.