Power System Controller Design based on Model Identification with Phasor Measurements

Masayuki Watanabe, Masaru Fukushima, Tomohiro Maeda, and Yasunori Mitani


power system control, power system stabilizer, wide area phasor measurement, low-frequency oscillations


This paper presents a method for the tuning of a power system stabilizer (PSS) for damping inter-area low-frequency oscillations based on wide area phasor measurements and H infinity control theory. The dynamics of a power system is identified as an approximate model based on voltage phasors obtained by the wide area measurement system (WAMS). Then, a PSS is designed by applying H infinity control theory on the approximate model. The inter-area mode should be damped effectively by a well-tuned PSS based on the state monitoring with the modeling error compensation considered. The proposed method has been applied to a simple two-area system to demonstrate the effectiveness of this approach.

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