Reviews on multilevel converter and modulation techniques

Hasan, Nor Shahida; Rosmin, Norzanah; Osman, Dygku. Asmanissa Awg.

doi:10.1016/j.rser.2017.05.163

Cited by 134 publications

(64 citation statements)

References 87 publications

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“…Two‐level VSCs need expensive output harmonic filter due to the low harmonic performance. In comparison with the two‐level VSC, multilevel converters (MCs) have excellent output voltage quality, reduced output filter size, and high efficiency . The modular multilevel converter (MMC), which is one of the most used MCs, has been firstly introduced by Lesnicar and Marquardt with its operating principle for a large scale power capacity.…”

Section: Introductionmentioning

confidence: 99%

Recent contributions and future prospects of the modular multilevel converters: A comprehensive review

Kurtoğlu

Eroğlu

Arslan

et al. 2018

Int Trans Electr Energ Syst

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Summary The modular multilevel converters (MMCs) are frequently preferred for medium and high power energy conversion systems thanks to their modular structure and high quality output waveform. The remarkable studies related to the MMC have been carried out in recent years, which are mainly focused on its topology, control, or application. In this paper, MMC circuit topologies consisting of traditional submodule cells and new proposed configurations are introduced, and their control process, modulation techniques, and application areas are discussed in order to provide the readers the current state of the art of MMC technology. A wide part of this article is devoted to demonstrate the recent contributions arising in MMC studies. In this context, this paper not only outlines the circuit topology, control objectives, and applications of the MMC but also presents a comprehensive review, principally in terms of the latest developments of it. Ultimately, detailed proposals and new possible topics are provided to drive future expectations of MMC technology.

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Section: Introductionmentioning

confidence: 99%

Recent contributions and future prospects of the modular multilevel converters: A comprehensive review

Kurtoğlu

Eroğlu

Arslan

et al. 2018

Int Trans Electr Energ Syst

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“…The derivative term is realized using a derivative gain along with a low pass filter that aids in attenuation of high frequency noise. 21 The multilevel configuration also contributes to lessening of voltage stress across the switches thereby improving its reliability. 14 Multilevel converters have evolved over the years and has become an active domain of research for high and medium power applications.…”

Section: Introductionmentioning

confidence: 99%

“…Details related to the various modulation techniques used like the Phase-Shifted, Level-Shifted, Space Vector PWM, and Selective harmonic elimination have been discussed in Rodriguez et al 19 Various topologies of multilevel converters and their specific applications and drawbacks have been presented in Leon et al 20 Reviewing the work reported, it can be concluded that the 3-level NPC stands to be a popular configuration owing to its lesser number of devices and capacitors that aids in attaining capacitor voltage balancing which is otherwise difficult in its higher level counterparts. 21 The multilevel configuration also contributes to lessening of voltage stress across the switches thereby improving its reliability. The most critical component in a PV system is the power electronic interface and the stresses on its components determine its longevity which in turn is dependent on the working conditions, switch stress, etc.…”

Section: Introductionmentioning

confidence: 99%

FPGA‐based implementation for improved control scheme of grid‐connected PV system with 3‐phase 3‐level NPC‐VSI

Jena

Panda

Peesapati

2018

Circuit Theory & Apps

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The large scale penetration of renewable energy resources has boosted the need of using improved control technique and modular power electronic converter structures for efficient and reliable operation of grid-connected systems.This study investigates the performance of a grid-connected 3-phase 3-level neutral-point clamped voltage source inverter for renewable energy integration by using improved current control technique. For medium or high-voltage grid interfacing, the multilevel inverter structure is generally used to reduce the voltage stress across the switching device as well as the harmonic distortion.The neutral-point clamped voltage source inverter is controlled by using decoupling technique along with the proper grid synchronization via moving average filter-based phase-locked loop. The moving average filter-based phase-locked loop is used to reduce the delay in grid angle estimation under balanced as well as distorted grid conditions. A Lyapunov-based approach for analysing the stability of the system has also been discussed. In this study, the hardware-in-loop (HIL) simulation of the control algorithm and the grid synchronization technique is realized using Virtex-6 FPGA ML605 evaluation kit. The performance of the system is analyzed by conducting a time-domain simulation in the Matlab/Simulink platform and its performance is examined in the HIL environment.The simulation and the hardware cosimulation results are presented to validate the effectiveness of the proposed control scheme. KEYWORDS field programmable gate array (FPGA), moving average filter (MAF), photovoltaic (PV), phase-locked loop (PLL), two-degree-of-freedom (2DoF) 942

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“…There are some previous theoretic works on this subject, including mathematical model, topology, and control strategy of MMC, calculation methods of static security analysis, total supply capability, as well as reliability model of SP‐DCLink . The previous work focuses on 1 aspect, such as the control of MMC or operation of SP‐DCLink.…”

Section: Introductionmentioning

confidence: 99%

Key technologies for flexible interconnection in urban power grid and pilot demonstration

Xiao

Bai

et al. 2018

Int Trans Electr Energ Syst

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Summary The application of power electronics is an important trend of power system transformation. This paper introduces the world's first flexible interconnection in 220‐kV urban power grid for the first time. This paper presents the key technologies for this project. Firstly, this paper introduces the concept of flexible interconnection, in which the flexible loop operation mode is proposed. Then, this paper introduces the pilot project of partition flexible interconnection in Beijing, China. The project is to build a new flexible DC interconnection based on back‐to‐back modular multilevel converter technology between 2 subtransmission areas in Beijing power supply grid, in order to enhance stability and security. Finally, the project is comprehensively evaluated based on real project data, in which transient voltage stability, static voltage security, total supply capability, short‐circuit current, and reliability are analyzed. The results have shown the effectiveness of the proposed flexible interconnection in large‐scale urban power grid. This project demonstrates a promising application of advanced power electronics in urban power grid.

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Reviews on multilevel converter and modulation techniques

Cited by 134 publications

References 87 publications

Recent contributions and future prospects of the modular multilevel converters: A comprehensive review

Recent contributions and future prospects of the modular multilevel converters: A comprehensive review

FPGA‐based implementation for improved control scheme of grid‐connected PV system with 3‐phase 3‐level NPC‐VSI

Key technologies for flexible interconnection in urban power grid and pilot demonstration

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