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Title in Portuguese: Interval robust controller to minimize oscillations effects caused by constant power load in a DC multi-converter Buck-Buck system
Author: Marcillo, Kevin Eduardo Lucas
Guingla, Douglas Antonio Plaza
Medeiros, Renan Laudau Paiva de
Beavides, David Alejandro Vaca
Nogueira, Fabrício Gonzalez
Keywords: Engenharia elétrica
Correntes elétricas
Conversores de frequência
Robust control based on Kharitonov rectangle
Mitigation oscillations in multi-converter buck-buck system
Constant power load
Multi-converter buck-buck system
Parametric uncertainties
Issue Date: 2019
Publisher: IEEE Access
Citation: MARCILLO, K. E. L. et al. Interval robust controller to minimize oscillations effects caused by constant power load in a DC multi-converter Buck-Buck system. IEEE Access, v. 7, p. 26324 - 26342, 2019.
Abstract: Multi-converter electronic systems are becoming widely used in many industrial applications; therefore, the stability of the whole system is a big concern to the real-world power supplies applications. A multi-converter system comprised of cascaded converters has a basic con guration that consists of two or more converters in series connection, where the rst is a source converter that maintains a regulated dc voltage on the intermediate bus while remaining are load converters that convert the intermediate bus voltage to the tightly regulated outputs for the next system stage or load. Instability in cascaded systems may occur due to the constant power load (CPL), which is a behavior of the tightly regulated converters. CPLs exhibit incremental negative resistance behavior causing a high risk of instability in interconnected converters. In addition, there are other problems apart from the CPL, e.g., non-linearities due to the inductive element and uncertainties due to the imprecision of a mathematical model of dc dc converters. Aiming to effectively mitigate oscillations effects in the output of source converter loaded with a CPL, in this paper, an interval robust controller, by linear programming based on Kharitonov rectangle, is proposed to regulate the output of source converter. Several tests were developed by using an experimental plant and simulation models when the multi-converter buck buck system is subjected to a variation of power reference. Both simulation and experimental results show the effectiveness of the proposed controller. Furthermore, the performance indices computed from the experimental data show that the proposed controller outperforms a classical control technique.
metadata.dc.type: Artigo de Periódico
ISSN: 2169 - 3536
Appears in Collections:DEEL - Artigos publicados em revista científica

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