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Application of a nonlinear hybrid controller in multi-machine power system based on a power system stabilizer

Ahmadi-Zebarjad M., Shahgholian G.

Journal of Power Technologies

2017

Vol. 97, nr 4

295--301

The power system stabilizer (PSS) is used to generate supplementary control signals for the excitation system in order to dampen low frequency oscillations. This paper presents an approach to designing a hybrid power system stabilizer (HPSS), which is a parallel combination of a conventional PSS and a nonlinear control system, to enhance transient stability for multimachine power systems. The effectiveness and applicability of the proposed approach are examined using a standard multimachine power system. The nonlinear system simulation results show that the HPSS is more effective than the conventional PSS in damping oscillations.