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Room: 011 Phone: +49 721 608-46251 Fax: +49 721 358854 johannes kolbEvu8∂kit edu | ||
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| Projekt 704//Multilevelumrichter |
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| Anwendungspotentiale von Modularen Multilevelumrichtern in innovativen Antriebssystemen | VDE/VDI-Fachtagung Antriebssysteme 2013, Nürtingen |
Das Prinzip der Modularen Multilevelumrichter (MMC, M2C) ist ein innovativer Ansatz aus der Gleichstrom-Energieübertragung im Hochspannungsbereich, welcher vorteilhaft für Antriebsumrichter eingesetzt werden kann. Der Beitrag stellt die MMC-Topologien mit ihren Anwendungspotentialen sowie deren Vorteile für die Speisung von elektrischen Drehstrommaschinen dar. Hierbei werden die grundlegenden funktionalen Zusammenhänge hinsichtlich der Regelung und Dimensionierung vorgestellt und die Auswirkungen auf die Maschinen diskutiert. Zusätzlich lässt sich die Integration von Batteriespeichern mit Hilfe von hocheffizienten DC-DC-Wandlern auf Zellebene aufwandsarm realisieren. |
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| Innovative Konzepte und Anwendungen von Modularen Multilevelumrichtern in zukünftigen Energiesystemen | 2. Jahrestagung des KIT-Zentrums Energie, Karlsruhe |
Modulare Multilevelumrichter bieten aufgrund der Serienschaltung von identischen leistungselektronischen Zellen zahlreiche Vorteile in verschiedensten Anwendungen für zukünftige Energiesysteme. Sie ermöglichen insbesondere im Hochspannungsbereich flexible und skalierbare Lösungen zur effizienten Umwandlung von elektrischer Energie bis weit in den Megawattbereich hinein. Durch die Erzeugung von mehrstufigen Spannungen mit geringen Oberschwingungen werden Filtermaßnahmen minimiert und die Qualität der Stromeinprägung deutlich erhöht. Neben der Kopplung unterschiedlicher elektrischer Netze sowie der Anbindung von elektrischen Maschinen bzw. Generatoren eignen sich Modulare Multilevelumrichter besonders zur Integration von Batterien für die großtechnische Speicherung von elektrischer Energie. Diese Schaltungstopologie bildet damit eine mögliche Schlüsseltechnologie zur Bewältigung der technischen Herausforderungen in zukünftigen elektrischen Energiesystemen, insbesondere bei der Einbindung von regenerativen Energiequellen. |
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| Modularer Multilevel Matrix Umrichter für flexible und hocheffiziente Generatorsysteme | 2. Jahrestagung des KIT-Zentrums Energie, Karlsruhe |
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| Boosting the Efficiency of Low Voltage Modular Multilevel Converters beyond 99% | PCIM Europe 2013, Nuremberg, Germany |
The Modular Multilevel Converter (MMC) is an upcoming topology for high efficiency power |
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| Benefits of Operating Doubly Fed Induction Generators by Modular Multilevel Matrix Converters | PCIM Europe 2013, Nuremberg, Germany |
The benefits of supplying the rotor circuit of a Doubly Fed Induction Generator (DFIG) by the |
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| Novel DC-AC Converter Topology for Multilevel Battery Energy Storage Systems | PCIM Europe 2013, Nürnberg |
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| Dimensioning and Design of a Modular Multilevel Converter for Drive Applications | EPE-PEMC 2012 ECCE Europe, Novi Sad, Serbia |
The Modular Multilevel Converter is an upcoming topology for medium voltage drive applications in the megawatt power range. This paper presents the procedure of the converter’s dimensioning, which is used for the design of a prototype MMC-System. The voltage rating and the required size of the capacitors in the cells are calculated. The inductance of the arm choke, depending on the modulation strategy is determined. The prototype is realised by using self-powered cells, which are precharged without any additional power supply during the start-up phase. The design of the complete prototype including the signal processing is shown. This system provides the opportunity to analyse different control schemes, modulation strategies, impacts on the machine etc. |
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| Fully decoupled current control and energy balancing of the Modular Multilevel Matrix Converter | EPE-PEMC 2012 ECCE Europe, Novi Sad, Serbia |
The Modular Multilevel Matrix Converter (M3C) is a Modular Multilevel Converter topology which is suitable for high power low speed drive applications. This paper presents a fully decoupled current control which allows an independent input, output and internal balancing current control. To equalize the energy stored in the nine converter arms, an energy and balancing control is presented which includes average, horizontal, vertical and diagonal balancing control loops. Simulation results are used to verify the function of the M3C together with an induction motor drive system. Additionally, the proper function of the recently constructed arm PCB working as single phase multilevel STATCOM is presented. This PCB will be used for each arm in the laboratory prototype of the M3C in the near future. |
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| Operating performance of Modular Multilevel Converters in drive applications | PCIM Europe 2012, 8-10 May 2012, Nuremberg, Germany |
The Modular Multilevel Converter (MMC) is an upcoming topology for high power drive applications in the medium voltage range. This paper presents an investigation on MMCs used as motor-sided converter as well as grid-sided active-front-end converter. Experimental results from a prototype system show the operating performance of the DC-coupled MMCs at steady state including the start-up procedure. The dynamic response of the system is tested to verify the cascaded and transformed control scheme of the MMC. This control ensures a balanced energy distribution inside the MMCs in every operating point. |
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| Optimization of the passive components of the Modular Multilevel Matrix Converter for Drive Applications | |||
| Modulare Multilevelumrichter für Antriebssysteme – Chancen und Herausforderungen | SPS/IPC/DRIVES 2011, Kongress, Elektrische Automatisierung, Nürnberg |
In dem Beitrag wird die Anwendung von Modularen Multilevelumrichtern (MMC/M2C) zur Speisung von Drehstrommaschinen analysiert. Der modulare Aufbau des MMCs bietet zahlreiche Vorteile für den Betrieb von Mittelspannungsantrieben der Megawattklasse. Die Regelung des Umrichters sowie die interne Symmetrierung stellen die Herausforderungen beim Betrieb dar. Die Zusammenhänge zwischen den internen Energien, Spannungen und Strömen werden systematisch hergeleitet und daraus geeignete Regel- und Modulationsverfahren entwickelt. This contribution presents a complete concept to control the Modular Multilevel Converter for feeding three-phase machines over their whole frequency range. The control scheme is realised by the combination of the decoupled current control and the balancing of the inner energy stored in the capacitors of the converter’s arms. The illustrated modulation schemes have to realise the generation of the pulse patterns for the cells to form the arm voltages as well as the equalisation of the energy in the cells. The dimensioning regarding the energy pulsation and the current load in the arms is added. |
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| Straight forward vector control of the Modular Multilevel Converter for feeding three-phase machines over their complete frequency range | IECON 2011 - 37th Annual Conference on IEEE Industrial Electronics Society, Melbourne |
The paper presents a control strategy for the Modular Multilevel Converter (MMC), which allows feeding a three-phase machine over its complete frequency range. The machine is controlled by a standard field oriented control in the outer closed loop. The inner control has to met the challenge of balancing the energy stored in the capacitance of the converter arms. In this approach two operation modes are used: a low frequency mode for start-up and low speed operation plus a high frequency mode for higher speed. A special control scheme for the low frequency mode has to be applied to achieve low energy pulsation in the |
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| A novel cascaded vector control scheme for the Modular Multilevel Matrix Converter | IECON 2011 Melbourne Australia |
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| A novel control scheme for low frequency operation of the Modular Multilevel Converter | PCIM Europe 2011, 17-19 May 2011, Nuremberg, Germany |
The paper presents a control strategy for the Modular Multilevel Converter (MMC), which is able to provide low frequency or even zero frequency three-phase output voltages. This feature is necessary to feed a three-phase machine at low frequency. The common mode voltage and correspondent inner currents ensure a symmetrical energy distribution in the arms of the MMC and avoid AC-currents in the DC-source. |
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| Optimization of double-layer-capacitor storage systems for different applications | ESSCAP '08, 3rd European Symposium on Supercapacitors and Applications, 6.-7.11.2008, Rom |
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| Artikel (Buch/Zeitschrift) 534//Dummy |
| title | type | place | time |
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| Vorlesung 428//Seminar Leistungselektronik in Systemen der regenerativen Energieerzeugung | seminar | 8C8D1596A76E43C4B3E53463F7B46E61 | fraitags, 8:30 - 11:00 Uhr |
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