CONTROLLER AND CONTROL METHOD OF SECONDARY EXCITING DEVICE, AND VARIABLE SPEED PUMPED-STORAGE POWER GENERATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To reduce harmonic voltage distortion rate of a power system.SOLUTION: A controller of a secondary exciting device for supplying a rotary machine with a voltage or a current of variable frequency includes harmonic wave frequency calculation means for calculating the frequency of a specific harmonic wave generated on the primary of the rotary machine by using the slip frequency or rotational speed of the rotary machine and the carrier frequency of the secondary exciting device, and carrier frequency correction means for correcting the carrier frequency of the secondary exciting device, so that the frequency of a harmonic wave falls within some band.SELECTED DRAWING: Figure 1