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Control of Direct AC/AC Modular Multilevel Converters Using Capacitor Voltage Estimation
KTH, School of Electrical Engineering (EES), Electric power and energy systems. (High power electronics)ORCID iD: 0000-0001-8891-5659
KTH, School of Electrical Engineering (EES), Electric power and energy systems.ORCID iD: 0000-0002-8565-4753
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2016 (English)In: 18th European Conference on Power Electronics and Applications (EPE'16 ECCE Europe), 2016, IEEE conference proceedings, 2016, 1-9 p.Conference paper (Refereed)
Abstract [en]

This paper applies a control method based on current control and sum-capacitor-voltage estimation to the direct ac/ac modular multilevel converter. As capacitor voltages are estimated, their measurements are not needed in the high-level control, which simplifies the communication between the main controller and the submodules of the converter. The stability of the internal dynamics of the converter, using the aforementioned control method, is studied using Lyapunov stability theory, proving that the system is globally asymptotically stable. The behavior of the converter is simulated focusing on three-phase 50 Hz to single-phase 16 2/3 Hz conversion, which is typical for railway power supply systems of some European countries. Simulation results are in agreement with the expected behavior of the converter, both in steady-state and dynamic situations.

Place, publisher, year, edition, pages
IEEE conference proceedings, 2016. 1-9 p.
Keyword [en]
AC-AC power convertors;Lyapunov methods;capacitors;electric current control;railway electrification;stability;European country;Lyapunov stability theory;capacitor voltage estimation;current control;direct AC-AC modular multilevel converter;frequency 50 Hz;railway power supply system;sum-capacitor-voltage estimation;Band-pass filters;Capacitors;Current control;Estimation;Legged locomotion;Voltage control;Voltage measurement;AC-AC converters;Lyapunov methods;current control;multilevel systems
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Electrical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-197611DOI: 10.1109/EPE.2016.7695319ScopusID: 2-s2.0-84996836164OAI: oai:DiVA.org:kth-197611DiVA: diva2:1052167
Conference
2016 18th European Conference on Power Electronics and Applications (EPE'16 ECCE Europe)
Note

QC 20161207

Available from: 2016-12-05 Created: 2016-12-05 Last updated: 2016-12-07Bibliographically approved

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Publisher's full textScopushttp://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=7695319&isnumber=7695111

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