Power system stabilizer using variable speed synchronous machine and flywheel.

摘要

PURPOSE:To enhance stability of power system by employing a variable speed synchronous machine and a flywheel. CONSTITUTION:The inventive system comprises a variable speed synchronous machine 1 (hereinafter, referred to variable speed machine connected with a power system 6 and having a rotor coupled with a flywheel, and an excitation controller 10 for controlling the frequency, the absolute value and the phase of exciting voltage for the variable speed machine 1. The excitation controller 10 controls at first the absolute value of the exciting voltage to regulate the output voltage to a reference voltage and further controls the frequency of the exciting voltage to a slip frequency. Detected value of effective power of a generator connected with the variable speed machine 1 and a power system is then inputted and the phase angle of the exciting voltage is controlled to bring fluctuation of any one effective power to zero. Alternatively, any one of the reactive power of the variable speed machine 1 or a detected value of output voltage may be inputted and the absolute value of exciting voltage may be subjected to correction control to bring fluctuation of the reactive power or the output voltage to zero.