Experimental Comparison of Model Predictive Control and Cascaded Control of the Modular Multilevel Converter

Böcker, Jan; Freudenberg, Benjamin; Dieckerhoff, Sibylle

doi:10.1109/tpel.2014.2309438

Cited by 145 publications

(68 citation statements)

References 15 publications

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“…Therefore, real-time implementation of MPC technique becomes a challenging task. The same has been concluded from comparison study done between classical and MPC techniques in [148]. Subsequently, new technique with three independent predictive controllers is proposed for the ac-side currents, circulating currents, and SM capacitor voltage balancing [149].…”

Section: A Emerging Multilevel Topologiesmentioning

confidence: 68%

A Survey of Low Switching Frequency Modulation Techniques for Medium-Voltage Multilevel Converters

Edpuganti

Rathore

2015

IEEE Trans. on Ind. Applicat.

159

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Multilevel converters (MLCs) have emerged as standard power electronic converters for medium voltage high power industrial applications. Owing to dominating device switching losses in high power applications, it is preferable to use low device switching frequency (LDSF) modulation techniques. Then, it is possible to achieve higher device utilization, higher converter efficiency and reduced cooling requirements. However, there exists a trade-off between device switching frequency and harmonic distortion of converter output currents. Therefore, the main challenge for LDSF modulation techniques is to minimize the harmonic distortion of output currents. The goal of this paper is to provide a review of various LDSF modulation techniques proposed in the literature and also discuss in detail about one of the the emerging LDSF control techniques known as synchronous optimal pulsewidth modulation. Finally, challenges to LDSF modulation techniques for emerging multilevel topologies and future trends in applications of MLCs are discussed to motivate further research, to enhance proposed LDSF techniques and to explore for new alternatives.

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Section: A Emerging Multilevel Topologiesmentioning

confidence: 68%

A Survey of Low Switching Frequency Modulation Techniques for Medium-Voltage Multilevel Converters

Edpuganti

Rathore

2015

IEEE Trans. on Ind. Applicat.

159

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“…3 (a). A direct calculation of the reference to the value of (5) was shown to improve the dynamic performance of the controller [9] under transient conditions with such methods also applicable to model predictive control of the converter [8] and to MMCs operating under unbalanced conditions [11]. A circulating current control method based on the energy within the arms and controllers on the positive and negative synchronous reference frame was presented in [7].…”

Section: Circulating Current and Control In Modular Multilevel Comentioning

confidence: 99%

Control of Circulating Currents in Modular Multilevel Converters Through Redundant Voltage Levels

Konstantinou

Pou

Ceballos

et al. 2016

IEEE Trans. Power Electron.

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Amongst the main control targets in a modular multilevel converter (MMC) is the control of the circulating currents within the phase-legs of the topology. This paper presents a controller for the circulating current of the MMC that utilises the available redundancies of the multilevel waveform in 2N + 1 modulated MMCs in order to regulate the circulating current to its reference. The main advantages of the approach are the elimination of control loops that generate the reference voltages for the control of the circulating current, simple implementation and very fast dynamic performance. The controller is implemented at the modulation stage and its operation is independent of the circulating current reference. An extension of the controller to track large deviations in the circulating current is also demonstrated. The simplicity and effectiveness of the proposed controller is illustrated through detailed simulations and experimental results from a single-phase laboratory prototype.

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“…It promises some significant advantages for the converter control. For example, MPC can easily handle multiple variables with their boundaries and nonlinearities within a single control law as well as its concept is simple and intuitive [9]- [12]. Finite Control Set-MPC (FCS-MPC) chooses the optimized state for the converter and applies it directly to the converter switches.…”

Section: Introductionmentioning

confidence: 99%

Modified Finite Control Set-Model Predictive Controller (MFCS-MPC) for quasi Z-Source Inverters based on a Current Observer

Bakeer¹,

Ismeil²,

Orabi³

2017

Journal of Power Electronics

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The Finite Control Set-Model Predictive Controller (FCS-MPC) for quasi Z-Source Inverters (qZSIs) is designed to reduce the number of sensors by proposing a current observer for the inductor current. Unlike the traditional FCS-MPC algorithm, the proposed model removes the inductor current sensor and observes the inductor current value based on the deposited prior optimized state as well as the capacitor voltage during this state. The proposed observer has been validated versus a typical MPC. Then, a comparative study between the proposed Modified Finite Control Set-Model Predictive Controller (MFCS-MPC) and a linear PID controller is provided under the same operating conditions. This study demonstrates that the dynamic response of the control objectives by MFCS-MPC is faster than that of the PID. On the other hand, the PID controller has a lower Total Harmonic Distortion (THD) when compared to the MFCS-MPC at the same average switching. Experimental results validate both methods using a DSP F28335.

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Experimental Comparison of Model Predictive Control and Cascaded Control of the Modular Multilevel Converter

Cited by 145 publications

References 15 publications

A Survey of Low Switching Frequency Modulation Techniques for Medium-Voltage Multilevel Converters

A Survey of Low Switching Frequency Modulation Techniques for Medium-Voltage Multilevel Converters

Control of Circulating Currents in Modular Multilevel Converters Through Redundant Voltage Levels

Modified Finite Control Set-Model Predictive Controller (MFCS-MPC) for quasi Z-Source Inverters based on a Current Observer

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