Comparison of PWM Techniques for Modular Multilevel Converter: A Comparison Based on Different Voltage Level Waveforms

Bekhouche, R.; Khoucha, Farid; Benrabah, Abdeldjabar; Benmansour, K.; Benbouzid, Mohamed

doi:10.1109/ccssp49278.2020.9151588

Cited by 10 publications

(4 citation statements)

References 9 publications

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“…This paper proposed the modular multi-level converter for supplying power to gradient coils of MRI system. In recent years, the modular multilevel converter (MMC) topology has become one of the most alluring topologies for high voltage and high-power applications [5], [6]. The key features of this converter is…”

Section: Introductionmentioning

confidence: 99%

Multicarrier PWM techniques for three phase modular multilevel converter application in MRI systems

Devendiren,

Babu

2024

IJPEDS

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This research paper presents about the performance analysis of three phase modular multilevel converter with level shifted (phase disposition pulse width modulation) and phase shifted pulse width modulation (PWM) method. This research not only discusses the significance of different modulation procedures in the context of modular multilevel converters but also carefully evaluates each of their unique performance characteristics. This research is based on the fundamental creation of pulses and patterns that can only be acquired by comparing sinusoidal reference signals with triangular carrier signal. Both levels shifted (phase disposition) and phase shifted PWM procedures are used to calculate the phase output voltage of a converter at 2N+1 level. The output waveform is crucially shaped by these modulation techniques, which also ensure effective energy conversion and lower harmonic content. On the basis of the output voltage waveform's quality, the comparative research is conducted and simulated results were presented.

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Section: Introductionmentioning

confidence: 99%

Multicarrier PWM techniques for three phase modular multilevel converter application in MRI systems

Devendiren,

Babu

2024

IJPEDS

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“…Meanwhile, MMC can generate two different types of output-phase voltage levels (N+1 and 2N+1), according to the different arrangement of the carrier signals. The carrier signal distribution method for the carrier phase-shifted N+1 pulse-width modulation and carrier phase-shifted 2N+1 pulse width modulation is analyzed and compared in [4]. The results show that the output waveform quality of the carrier phase-shifted 2N+1 pulsewidth modulation approach is better.…”

Section: Introductionmentioning

confidence: 99%

A Circulating Current Suppression Strategy for MMC Based on the 2N+1 PWM Approach

Zhang,

Song,

et al. 2023

WEVJ

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Compared with other topologies, the modular multilevel converter (MMC) has the advantages of higher scalability and lower harmonic distortion. When carrier-based pulse-width modulation approaches are used for the MMC, the number of carriers increases for more sub-modules, and the complexity of the control and the memory required increases as a result. In addition, the synchronization of several carriers is another issue. Due to the unique constructional characteristics of the MMC, circulating currents will be generated internally, causing distortions in the arm currents and, thus, unnecessary converter losses. In this paper, an improved 2N+1 pulse-width modulation approach with low control complexity and a circulating current suppression strategy are proposed. Firstly, the conventional carrier phase-shifted 2N+1 pulse-width modulation approach is improved so that the number of carrier signals adopted in each arm is always two. Secondly, the redundant switching states are used to suppress the circulating current. Finally, the effectiveness of the proposed strategy is verified experimentally. The results show that the proposed method reduces the control complexity while retaining the output performance. Meanwhile, the circulating current can be suppressed.

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“…One of them is the high switching frequency and the other is fundamental switching frequency [21]. The categorization of high switching frequency is as follows: space vector PWM, selective harmonics elimination PWM and SPWM [22]. Among these techniques, the popular method is SPWM that is used for most of the multilevel inverters, because of its simplicity and ease of implementation [23].…”

Section: Introductionmentioning

confidence: 99%

MATLAB-Simulink environment based power quality improvement in photovoltaic system using multilevel inverter

Priyanka¹,

Kumari²,

Lenine³

et al. 2023

Electrical Engineering & Electromechanics

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Introduction. In this world of technical advancement, conventional resources are at the stage of destruction. To avoid such problems, we are going to use an alternative energy source namely solar by photovoltaic effect. The demand for multilevel inverters increased as they are used for different dynamic (high) voltage and dynamic (high) power appliances as they are capable of producing the output wave shape with low total harmonic distortion. Novelty. A new multilevel inverter is used in adding a (bidirectional) two way switch in between the capacitor and a traditional H-bridge module. This produces a better sine wave. By series connection of these two H-bridge modules, nine levels output voltage including zero is possible. The purpose of the proposed topology is reduction in the number of switches and it gives the good result with comparatively less power loss when it is compared with the other normal basic traditional inverters of the same output quality. Methods. In this paper, sinusoidal pulse width modulation technique is used for the working of the switches in the multilevel inverter. The results are verified by using simulation and also experimental setup is done. From the results it is observed that the proposed topology with reduced number of switches gives lower electromagnetic interference, lower harmonic distortion. Practical value. The total harmonic distortion value in the simulation is 14.4 % and practically it is 13.8 %.

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Comparison of PWM Techniques for Modular Multilevel Converter: A Comparison Based on Different Voltage Level Waveforms

Cited by 10 publications

References 9 publications

Multicarrier PWM techniques for three phase modular multilevel converter application in MRI systems

Multicarrier PWM techniques for three phase modular multilevel converter application in MRI systems

A Circulating Current Suppression Strategy for MMC Based on the 2N+1 PWM Approach

MATLAB-Simulink environment based power quality improvement in photovoltaic system using multilevel inverter

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