Stabilizer for power system

摘要

The stabilizer for power system is capable of suppressing power unstableness quickly and functioning effectively to a plurality of power disturbances even if the non-linearity of the power system becomes more intense because the stability point is moved from optimum stability. A phase difference calculating circuit calculates the phase difference between the internal phase angle of a generator and the voltage phase in a secondary bus line of a main transformer connected to a synchronous generator. A power system stabilizer produces an auxiliary signal based on the output of the phase difference calculating circuit. A first nonlinear compensating circuit and a second nonlinear compensating circuit produce compensating signals for compensating the non-linearity of the power system in order to compensate the output of the power system stabilizer.