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Isaías V. De Bessa; Renan Landau Paiva De Medeiros. Investigation of the Performance of the Control Methodologies to Mitigate the Undesirable Oscillation in a Smart Grid System. Smart Trends in Computing and Communications: Proceedings of SmartCom 2020 2020, 406 -415.
AMA StyleIsaías V. De Bessa, Renan Landau Paiva De Medeiros. Investigation of the Performance of the Control Methodologies to Mitigate the Undesirable Oscillation in a Smart Grid System. Smart Trends in Computing and Communications: Proceedings of SmartCom 2020. 2020; ():406-415.
Chicago/Turabian StyleIsaías V. De Bessa; Renan Landau Paiva De Medeiros. 2020. "Investigation of the Performance of the Control Methodologies to Mitigate the Undesirable Oscillation in a Smart Grid System." Smart Trends in Computing and Communications: Proceedings of SmartCom 2020 , no. : 406-415.
This paper presents a novel direct form to design a digital robust control using RST structure (i.e., name given because of the R, S and T polynomials computed) based on convex optimization such as Chebyshev sphere; this approach was applied to a DC-DC Buck converter. This methodology takes into account parametric uncertainties and a Chebyshev sphere constraint in order to ensure robust performance and stability of the system in the discrete domain. For this purpose, a mathematical model for the DC-DC Buck converter is presented when considering uncertainties in electrical variables, such as load resistance, inductance, capacitance, and source voltage variation, also to obtain the discrete model of the system by using the bilinear transformation. The proposed methodology is compared with two other approaches designed in a discrete domain: the classical pole placement and the robust methodology based on the Kharitonov theorem. Wide-ranging experiments are performed in order to evaluate the behavior of the control methodologies when the system is subject to parametric variations of the load resistance and voltage setpoint variation. The results show that the proposed methodology outperforms the other approaches in 90% of the tests and ensures robust stability and robust performance when the system is subjected to a parametric uncertainties family.
Cleonor Das Neves; Walter B.; Renan De Medeiros; Florindo Ayres Junior; Iury Bessa; Isaías Bessa; Gabriela De M. Veroneze; Luiz E Silva; Nei Farias. Direct Form Digital Robust RST Control Based on Chebyshev Sphere Optimization Applied in a DC-DC Power Converter. Energies 2020, 13, 3810 .
AMA StyleCleonor Das Neves, Walter B., Renan De Medeiros, Florindo Ayres Junior, Iury Bessa, Isaías Bessa, Gabriela De M. Veroneze, Luiz E Silva, Nei Farias. Direct Form Digital Robust RST Control Based on Chebyshev Sphere Optimization Applied in a DC-DC Power Converter. Energies. 2020; 13 (15):3810.
Chicago/Turabian StyleCleonor Das Neves; Walter B.; Renan De Medeiros; Florindo Ayres Junior; Iury Bessa; Isaías Bessa; Gabriela De M. Veroneze; Luiz E Silva; Nei Farias. 2020. "Direct Form Digital Robust RST Control Based on Chebyshev Sphere Optimization Applied in a DC-DC Power Converter." Energies 13, no. 15: 3810.
The DC microgrid system is composed by converters that operate like feeders and loads. Among these loads, we highlight the constant power loads (CPLs) that may cause instability in the microgrid, observed in the form of undesired oscillations due to its negative impedance behavior. Therefore, this work proposes to use performance indices and stability margins to evaluate state and output feedback control strategies for stabilization of DC microgrids. In particular, it is proposed to evaluate the stability margin of the proposed methodologies by means of the impedance relations in the microgrid based on the Middlebrook criterion. Our simulations and tests showed the relation between the performance and stability degradation and the microgrid impedances variation.
Isaías V. De Bessa; Renan L. P. De Medeiros; Iury Bessa; Florindo A. C. Ayres Junior; Alessandra R. De Menezes; Gustavo M. Torres; João Edgar Chaves Filho. Comparative Study of Control Strategies for Stabilization and Performance Improvement of DC Microgrids with a CPL Connected. Energies 2020, 13, 2663 .
AMA StyleIsaías V. De Bessa, Renan L. P. De Medeiros, Iury Bessa, Florindo A. C. Ayres Junior, Alessandra R. De Menezes, Gustavo M. Torres, João Edgar Chaves Filho. Comparative Study of Control Strategies for Stabilization and Performance Improvement of DC Microgrids with a CPL Connected. Energies. 2020; 13 (10):2663.
Chicago/Turabian StyleIsaías V. De Bessa; Renan L. P. De Medeiros; Iury Bessa; Florindo A. C. Ayres Junior; Alessandra R. De Menezes; Gustavo M. Torres; João Edgar Chaves Filho. 2020. "Comparative Study of Control Strategies for Stabilization and Performance Improvement of DC Microgrids with a CPL Connected." Energies 13, no. 10: 2663.