Capacitor voltage balancing strategy based on sub-module capacitor voltage estimation for modular multilevel converters

Abdelsalam, Mahmoud; Marei, Mostafa I.; Tennakoon, S.B.; Griffiths, Alison

doi:10.17775/cseejpes.2016.00010

Cited by 44 publications

(16 citation statements)

References 14 publications

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“…Performance evaluation of proposed technique is conducted by both experimental and simulation results under normal and faulty conditions. In addition to this study, the main objective of Abdelsalam et al is to develop a new capacitor voltage balancing method based on prediction of capacitor voltage by using ADALINE algorithm, which needs only three voltage sensors per leg.…”

Section: Control Conceptmentioning

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: Control Conceptmentioning

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

View full text Add to dashboard Cite

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“…This voltage imbalance harms the stability of the system, and limits the switching operation of the power stage [8][9][10][11]. In order to mitigate the voltage imbalance, many strategies that are based on additional hardware configurations or control algorithms have been proposed, hardware configurations or control algorithms have been proposed, and have been successfully adapted in some applications [12][13][14][15][16][17][18][19][20][21][22][23][24][25]. In [12,13], additional circuits for dc-link balancing were proposed.…”

Section: Introductionmentioning

confidence: 99%

A Harmonic Voltage Injection Based DC-Link Imbalance Compensation Technique for Single-Phase Three-Level Neutral-Point-Clamped (NPC) Inverters

et al. 2018

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Abstract:In three-level neutral-point-clamped (NPC) inverters, the voltage imbalance problem between the upper and lower dc-link capacitors is one of the major concerns. This paper proposed a dc-link capacitor voltage balancing method where a common offset voltage was injected. The offset voltage consists of harmonic components and a voltage difference between the upper and the lower capacitors. Here, both the second-order harmonics and the half-wave of the second-order component were injected to compensate for the unbalanced voltage between the capacitors. In order to show the effectiveness of the proposed voltage injection, the theoretical analyses, simulations, and experimental results are provided. Since the proposed method does not require any hardware modifications, it can be easily adapted. Both the simulations and the experiments validated that the voltage difference of the dc-link could be effectively reduced with the proposed method.

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“…The NEA 800 project in India, which is designed for transporting the scattered hydropower to the load center over a long distance, is an LCC‐based MTDC . The VSC‐based technology, on the other hand, is taking the lead in some offshore wind and photovoltaic power projects …”

Section: Introductionmentioning

confidence: 99%

“…4 The VSC-based technology, on the other hand, is taking the lead in some offshore wind and photovoltaic power projects. [6][7][8] Between these 2 topologies, VSC is perfectly suited to MTDC/DC grids, because DC power flow can be reversed by changing current direction instead of voltage polarity. This capability means that the power can be reversed independently without voltage polarity reverse.…”

Section: Introductionmentioning

confidence: 99%

Feasibility study of DC circuit breaker-less MTDC systems

Xiao

et al. 2018

Int Trans Electr Energ Syst

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Summary This paper discusses the feasibility of clamp double submodule (CDSM) type modular multilevel converter‐based multiterminal high‐voltage direct current (MTDC) systems. Firstly, the MTDC system structures, the topology of CDSM, the DC fault current blocking capability of CDSM, and the possible control scheme for clearing DC fault with CDSM‐type modular multilevel converters are introduced. Based on the DC fault clearing control scheme, the DC fault impact on the connected AC system with the proposed method is analyzed in detail. Two types of test systems are built for this study, including the MTDC systems with 1 DC backbone and 2 DC backbones suitable for different occasions. The simulation waveforms are compared with those containing high‐voltage direct current circuit breakers. The results show that the connected AC system postfault responses do not diverse too much with the 2 configurations, which proves the feasibility of the DC circuit breaker‐less MTDC system.

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Capacitor voltage balancing strategy based on sub-module capacitor voltage estimation for modular multilevel converters

Cited by 44 publications

References 14 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

A Harmonic Voltage Injection Based DC-Link Imbalance Compensation Technique for Single-Phase Three-Level Neutral-Point-Clamped (NPC) Inverters

Feasibility study of DC circuit breaker-less MTDC systems

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