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Application of new POSICAST control method to synchronous generator excitation system

Ghorbani H., Monadi M., Ghorbani A., Candela J. I.

Journal of Power Technologies

2018

Vol. 98, nr 4

336--344

In this paper, modeling, analysis, design and simulation of a POSICAST controller are presented for application in a generator’s excitation system. Simple structure is the most important characteristic of this controller. The controller is a feedforward compensator; it eliminates intensive over/undershoots in system dynamic response. Since changing the reference signal in the excitation system of the synchronous generator causes oscillations in the terminal voltage, the POSICAST controller (PC) is applied at the outset of the excitation system to mitigate these oscillations. The impact of the proposed controller on the stability of the studied power system is evaluated by both eigenvalues analysis and experimental results. In order to validate the theory, the performance of the designed controller is verified in OPAL-RT by experimental approach.