Cascaded H-Bridge Multilevel Converter for a High-Power Medium-Voltage Impedance-Admittance Measurement Unit

Recent trends in power system design and inclusion of renewable energy sources and smart grids are creating different subsystem interactions that require proper investigation, understanding, describing and estimating global system stability through impedance-admittance measurement and identification. This paper proposes and presents the cascaded H-bridge multilevel inverter topology for perturbation injection converter and impedance-admittance measurement. The methodology of impedance-admittance measurement is explained together with different measurement. Performance and suitability of this topology for impedance-admittance measurement is evaluated through simulations. As a main result of this study, the feasibility of injecting small-signal perturbations in the medium-voltage level system is shown.

[1]  Enrico Santi,et al.  Wide bandwidth system identification of AC system impedances by applying pertubations to an existing converter , 2011, 2011 IEEE Energy Conversion Congress and Exposition.

[2]  Petre Stoica,et al.  Spectral Analysis of Signals , 2009 .

[3]  P. Zumel,et al.  Impedance Identification Procedure of Three-Phase Balanced Voltage Source Inverters Based on Transient Response Measurements , 2011, IEEE Transactions on Power Electronics.

[4]  Gerald Francis,et al.  An Algorithm and System for Measuring Impedance in D-Q Coordinates , 2010 .

[5]  Drazen Dujic,et al.  Leakage Flux Modeling of Medium-Voltage Phase-Shift Transformers for System-Level Simulations , 2019, IEEE Transactions on Power Electronics.

[6]  P. Welch.  The use of fast Fourier transform for the estimation of power spectra: A method based on time averaging over short, modified periodograms , 1967 .

[7]  Dushan Boroyevich,et al.  Medium-Voltage Impedance Measurement Unit for Assessing the System Stability of Electric Ships , 2017, IEEE Transactions on Energy Conversion.

[8]  Drazen Dujic,et al.  Dynamic Assessment of Source–Load Interactions in Marine MVDC Distribution , 2017, IEEE Transactions on Industrial Electronics.

[9]  Frede Blaabjerg,et al.  Harmonic Stability in Power Electronic-Based Power Systems: Concept, Modeling, and Analysis , 2019, IEEE Transactions on Smart Grid.

[10]  Drazen Dujic,et al.  Evaluation of 1.7 kV SiC MOSFETs for a regenerative cascaded H-bridge multilevel converter cell , 2018, 2018 IEEE International Conference on Industrial Technology (ICIT).

[11]  R. D. Middlebrook,et al.  Input filter considerations in design and application of switching regulators. , 1976 .

[12]  Zhiyu Shen,et al.  Online Measurement of Three-phase AC Power System Impedance in Synchronous Coordinates , 2013 .

[13]  Zhiyu Shen,et al.  Three-phase AC system impedance measurement unit (IMU) using chirp signal injection , 2013, 2013 Twenty-Eighth Annual IEEE Applied Power Electronics Conference and Exposition (APEC).

[14]  Jing Huang,et al.  New Techniques for Measuring Impedance Characteristics of Three-Phase AC Power Systems , 2009, IEEE Transactions on Power Electronics.

[15]  Steven Kay,et al.  Modern Spectral Estimation: Theory and Application , 1988 .

[16]  Marko Jaksic,et al.  Identification of small-signal dq impedances of power electronics converters via single-phase wide-bandwidth injection , 2015 .

[17]  Dushan Boroyevich,et al.  Wide-bandwidth Identification of small-signal dq impedances of ac power systems via single-phase series voltage injection , 2015, 2015 17th European Conference on Power Electronics and Applications (EPE'15 ECCE-Europe).