LPV-based power system stabilizer: Identification, control and field tests

• Published in: Control engineering practice Vol. 72; pp. 53 - 67
• Main Authors: Nogueira, Fabrício Gonzalez, Barra Junior, Walter, da Costa Junior, Carlos Tavares, Lana, Janio José
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01-03-2018
• Subjects: Linear matrix inequality; LPV control; LPV system identification; Power system stabilizer; Robust LMI relaxations; Sums of squares decomposition; Linear matrix inequality; Sums of squares decomposition; Power system stabilizer; LPV control; Robust LMI relaxations; LPV system identification
• ISSN: 0967-0661; 1873-6939
• DOI: 10.1016/j.conengprac.2017.11.004

This paper shows the design and tests of an LPV power system stabilizer aimed at improving the damping of electromechanical oscillations in power systems. In order to capture the dynamic model for control design, LPV models were estimated from experimental data. The generator active and reactive powers were used as scheduling parameters. The control problem is formulated as a parameterized linear matrix inequality, which the positivity condition is relaxed through a sum-of-squares decomposition. The controller ensures stability and H∞ performance for a set of operating conditions. Field tests were carried out on a 10-kVA machine and on a 350-MVA hydroelectric generator.