Nonlinear Stability Analysis of DC-DC Power Electronic Systems by Means of Switching Equivalent Models

The proliferation of renewable energy sources is promoting the use of dc-dc power electronic converters in power distribution systems. It is well-known that the interconnection of power electronic converters can be a source of instabilities. Traditionally, impedance-based stability analyses are perf...

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Main Authors: Hesam Mazaheri, Airan Frances, Rafael Asensi, Javier Uceda
Format: Article
Language:English
Published: IEEE 2021-01-01
Series:IEEE Access
Subjects:
Online Access:https://ieeexplore.ieee.org/document/9475070/
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spelling doaj-f1abbee9e169415981327242d35ea98a2021-07-15T23:00:19ZengIEEEIEEE Access2169-35362021-01-019984129842210.1109/ACCESS.2021.30948049475070Nonlinear Stability Analysis of DC-DC Power Electronic Systems by Means of Switching Equivalent ModelsHesam Mazaheri0https://orcid.org/0000-0002-0182-6424Airan Frances1https://orcid.org/0000-0003-3389-0815Rafael Asensi2https://orcid.org/0000-0002-3053-0462Javier Uceda3https://orcid.org/0000-0001-9534-5914Centro de Electrónica Industrial (CEI), Universidad Politécnica de Madrid, Madrid, SpainCentro de Electrónica Industrial (CEI), Universidad Politécnica de Madrid, Madrid, SpainCentro de Electrónica Industrial (CEI), Universidad Politécnica de Madrid, Madrid, SpainCentro de Electrónica Industrial (CEI), Universidad Politécnica de Madrid, Madrid, SpainThe proliferation of renewable energy sources is promoting the use of dc-dc power electronic converters in power distribution systems. It is well-known that the interconnection of power electronic converters can be a source of instabilities. Traditionally, impedance-based stability analyses are performed using either the analytical description or the identification of the output impedance of the source converter and the input admittance of the load converter. However, this methodology is restricted by the small-signal conditions, which are usually violated in this kind of systems due to the high variability imposed by the renewable energy sources. In nonlinear systems, the stability analysis usually consists on the definition of the region of attraction around a stable equilibrium point. In the literature, the analysis of nonlinear systems is almost exclusively applied to analytical systems, where all the details are known. This paper proposes a black-box methodology to obtain the region of attraction of the equilibrium point of commercial off-the-shelf dc-dc converters working in power distribution systems. First, optimization algorithms are used to identify the parameters of a predefined structure, such that it is able to reproduce the dynamic behavior of the system. The parameters identified can be used to create a switching equivalent model that accounts for the nonlinearities produced by the switching process of the converters. Second, the bisection method is implemented to minimize the number of simulations needed to determine the region of stability accurately. The proposed methodology has been validated both with simulations and with an experimental setup.https://ieeexplore.ieee.org/document/9475070/Bisection methodblack-box modelsdigital twinGAPSO algorithmnonlinear systemsoptimization algorithms
collection DOAJ
language English
format Article
sources DOAJ
author Hesam Mazaheri
Airan Frances
Rafael Asensi
Javier Uceda
spellingShingle Hesam Mazaheri
Airan Frances
Rafael Asensi
Javier Uceda
Nonlinear Stability Analysis of DC-DC Power Electronic Systems by Means of Switching Equivalent Models
IEEE Access
Bisection method
black-box models
digital twin
GAPSO algorithm
nonlinear systems
optimization algorithms
author_facet Hesam Mazaheri
Airan Frances
Rafael Asensi
Javier Uceda
author_sort Hesam Mazaheri
title Nonlinear Stability Analysis of DC-DC Power Electronic Systems by Means of Switching Equivalent Models
title_short Nonlinear Stability Analysis of DC-DC Power Electronic Systems by Means of Switching Equivalent Models
title_full Nonlinear Stability Analysis of DC-DC Power Electronic Systems by Means of Switching Equivalent Models
title_fullStr Nonlinear Stability Analysis of DC-DC Power Electronic Systems by Means of Switching Equivalent Models
title_full_unstemmed Nonlinear Stability Analysis of DC-DC Power Electronic Systems by Means of Switching Equivalent Models
title_sort nonlinear stability analysis of dc-dc power electronic systems by means of switching equivalent models
publisher IEEE
series IEEE Access
issn 2169-3536
publishDate 2021-01-01
description The proliferation of renewable energy sources is promoting the use of dc-dc power electronic converters in power distribution systems. It is well-known that the interconnection of power electronic converters can be a source of instabilities. Traditionally, impedance-based stability analyses are performed using either the analytical description or the identification of the output impedance of the source converter and the input admittance of the load converter. However, this methodology is restricted by the small-signal conditions, which are usually violated in this kind of systems due to the high variability imposed by the renewable energy sources. In nonlinear systems, the stability analysis usually consists on the definition of the region of attraction around a stable equilibrium point. In the literature, the analysis of nonlinear systems is almost exclusively applied to analytical systems, where all the details are known. This paper proposes a black-box methodology to obtain the region of attraction of the equilibrium point of commercial off-the-shelf dc-dc converters working in power distribution systems. First, optimization algorithms are used to identify the parameters of a predefined structure, such that it is able to reproduce the dynamic behavior of the system. The parameters identified can be used to create a switching equivalent model that accounts for the nonlinearities produced by the switching process of the converters. Second, the bisection method is implemented to minimize the number of simulations needed to determine the region of stability accurately. The proposed methodology has been validated both with simulations and with an experimental setup.
topic Bisection method
black-box models
digital twin
GAPSO algorithm
nonlinear systems
optimization algorithms
url https://ieeexplore.ieee.org/document/9475070/
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AT rafaelasensi nonlinearstabilityanalysisofdcdcpowerelectronicsystemsbymeansofswitchingequivalentmodels
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