Stabilizer for power system

Electricity: single generator systems – Automatic control of generator or driving means – Antihunting or rate of change

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322 20, 322 58, 361 20, H02P 910

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active

056044208

ABSTRACT:
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.

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Y. Cao et al., "A Nonlinear Variable Structure Stabilizer For Power System Stability", 94 WM 126-3 EC, IEEE/PES 1994 Winter Meeting, N.Y., N.Y. Jan. 30-Feb. 3, 1994, pp. 1-7.

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