open access publication

Conference Paper, 2024

A Gray-Box Stability Analysis Mechanism for Power Electronic Converters

2024 IEEE Applied Power Electronics Conference and Exposition (APEC), ISBN 979-8-3503-1664-3, Volume 00, Pages 1310-1315, 10.1109/apec48139.2024.10509115

Contributors

Kong, Rui (Corresponding author) [1] Sahoo, Subham Kumar 0000-0002-7916-028X [1] Song, Yubo 0000-0003-1452-449X [1] Blaabjerg, Frede 0000-0001-8311-7412 [1]

Affiliations

  1. [1] Aalborg University
    2. [NORA names: AAU Aalborg University; University; Denmark; Europe, EU; Nordic; OECD]

Abstract

This paper proposes a gray-box stability analysis mechanism based on data-driven dynamic mode decomposition (DMD) for commercial grid-tied power electronics converters with limited information on its control parameters and topology. By fusing the underlying physical constraints of the state equations into data snapshots, the system dynamic state matrix and input matrix are simultaneously approximated to identify the dominant system dynamic modes and eigenvalues using the DMD with control (DMDc) algorithm. While retaining the advantages of eliminating the need for intrinsic controller information, the proposed gray-box method establishes higher accuracy and interpretable outcomes over the conventional DMD method. Finally under experimental conditions of a low-frequency oscillation scenario in electrified railways featuring a single-phase converter, the proposed gray-box DMDc is verified to identify the dominant eigenvalues more accurately.

Keywords

DMD method, DMDC, accuracy, algorithm, analysis mechanism, conditions, constraints, control, control information, control parameters, converter, data, data snapshots, data-driven dynamic mode decomposition, decomposition, dominant eigenvalue, dynamic mode, dynamic mode decomposition, dynamic state matrix, eigenvalues, electrified railway, electronic converters, equations, experimental conditions, gray-box method, grey-box, information, input, input matrix, matrix, mechanism, method, mode, mode decomposition, oscillation scenario, outcomes, parameters, physical constraints, power, power electronic converters, railway, scenarios, single-phase converter, snapshots, stability analysis mechanism, state, state equation, state matrix, system, system dynamics mode, topology

Data Provider: Digital Science

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