Modeling and current control of modular multilevel converters considering actuator and sensor delays

Munch, Philipp; Liu, Steven; Dommaschk, Mike

doi:10.1109/iecon.2009.5414756

Cited by 43 publications

(16 citation statements)

References 4 publications

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“…One possible convention is given in table I that bases on the definition from literature [4] and should be the basis for further discussions in this elaboration (the labels are supplemented by a label called state that will become important in the next paragraphs). Meanwhile, the MMC is a very well-known converter topology; at this point the authors like to refer to the literature mentioned in the references for schematic circuit diagrams of the MMC and detailed explanations of the operating principle.…”

Section: Modulators For the Modular Multilevel-convertermentioning

confidence: 99%

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An enhanced modulator concept for the Modular Multilevel Converter

Schroeder

Henninger

Jaeger

et al. 2014

2014 16th European Conference on Power Electronics and Applications

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This paper deals with an enhanced modulator concept for the Modular Multilevel Converter. Based on an overview on existing concepts including module sorting algorithms and measurement results from a hardware-setup in laboratory, a new concept is developed. Measurement results of the implemented new algorithm for module selection and capacitor energy balancing in various operating points of the converter are presented and analyzed in detail. This elaboration is completed with a classification of the suggested modulator concept compared to established concepts.

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Section: Modulators For the Modular Multilevel-convertermentioning

confidence: 99%

“…One area is converter control and especially energy balancing control strategies [3][4][5]. Another field of research are battery energy storage systems based on the MMC topology that has been investigated [6,7].…”

Section: Introductionmentioning

confidence: 99%

An enhanced modulator concept for the Modular Multilevel Converter

Schroeder

Henninger

Jaeger

et al. 2014

2014 16th European Conference on Power Electronics and Applications

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show abstract

“…Currently, MMCs have been expanded to many applications [4] such as motor drivers [5], solar/wind power systems [6][7][8], energy transmission and distribution systems [9], and static synchronous compensators (STATCOM) [10]. Recently published literature related to MMC targeted current control, voltage control, loss analysis and modulation, dynamic and steady-state models, modeling, and simulation methods [11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

A New Adaptive Approach to Control Circulating and Output Current of Modular Multilevel Converter

et al. 2019

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This paper addresses the output current and circulating current control of the modular multi-level converter (MMC). The challenging task of MMCs is the control of output current and circulating current. Existing control structures for output and circulating current achieve control objectives with comparatively complex controllers and the designed parameters for the controller is also difficult. In this paper, an adaptive proportional integral (API) controller is designed to control the output current and the circulating current. The output current is regulated in α β axes while the circulating current is regulated in the a b c stationary frame to enhance MMC performance. The output and circulating current control results using an API controller are compared with the conventional proportional resonant (PR) controller in terms of transient response, stability, optimal performance, and reference tracking for results verification. The API control architecture significantly improve transient response, stability, and have excellent reference tracking capability. Moreover, it controls output current and converges the circulating current to a desired value. The control structure is designed for a three-phase MMC system, simulated and analyzed in MATLAB-Simulink.

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“…This increases the difficulty of designing the commonly used parallel or cascaded multi-PI(D)s control structures while dealing with complicated coupling, laborious PI parameters determination, a unpredictable closed-loop convergence rate and full utilization of the high-degree freedom [9]. Furthermore, the control design is far from an integrated and unified method for fulfilling all of the control requirements.…”

Section: Introductionmentioning

confidence: 99%

Multivariable Optimal Control of a Direct AC/AC Converter under Rotating dq Frames

Wan¹,

Liu²,

Jiang³

2013

Journal of Power Electronics

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The modular multilevel cascade converter (MMCC) is a new family of multilevel power converters with modular realization and a cascaded pattern for submodules. The MMCC family can be classified by basic configurations and submodule types. One member of this family, the Hexverter, is configured as Double-Delta Full-Bridge (DDFB). It is a novel multilevel AC/AC converter with direct power conversion and comparatively fewer required components. It is appropriate for connecting two three-phase systems with different frequencies and driving an AC motor directly from a utility grid. This paper presents the dq model of a Hexverter with both of its AC systems by state-space representation, which then simplifies the continuous time-varying model into a periodic discrete time-invariant one. Then a generalized multivariable optimal control strategy for regulating the Hexverter's independent currents is developed. The resulting control structure can be adapted to other MMCCs and is flexible enough to include other control criterion while guaranteeing the original controller performance. The modeling method and control design are verified by simulation results.

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Modeling and current control of modular multilevel converters considering actuator and sensor delays

Cited by 43 publications

References 4 publications

An enhanced modulator concept for the Modular Multilevel Converter

An enhanced modulator concept for the Modular Multilevel Converter

A New Adaptive Approach to Control Circulating and Output Current of Modular Multilevel Converter

Multivariable Optimal Control of a Direct AC/AC Converter under Rotating dq Frames

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