Assessment of Fault Tolerance in Modular Multilevel Converters With Integrated Energy Storage

Soong, Theodore; Lehn, Peter W.

doi:10.1109/tpel.2015.2477834

Cited by 70 publications

(40 citation statements)

References 26 publications

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“…The fundamental objective of Soong and Lehn is to present energy storage components that are integrated into the grid through MMC by performing DC/AC conversion stage. Performance evaluation is also carried out to demonstrate the power balance between grid and storage part under various conditions such as shutting down the energy storage banks consisting of supercapacitor units.…”

Section: Application Areasmentioning

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: Application Areasmentioning

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 reconfigurable solar converter with Lithium-Ion battery takes advantage of reduced number of conversion stages, which not only reduces complexity but also benefits in terms of cost, volume and weight. In [10], the extension of a MMC is demonstrated to form a three-port converter including AC grid, DC grid and the batteries as storing elements. The fault tolerance feature of this configuration is also established to cope with both the DC and AC grid faults.…”

Section: Introductionmentioning

confidence: 99%

A Reliable Modular Based PV-Battery Hybrid System with Peak Shaving Capability

Sohail¹,

Nademi

Norum³

2018

2018 IEEE 19th Workshop on Control and Modeling for Power Electronics (COMPEL)

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The driving factors in emerging photovoltaic (PV) systems and battery-energy-storage systems (BESS) are highly scalable feature, modular and flexible structures with superior transformerless performance. The feasibility of Modular Multilevel Converter (MMC) to operate without overall DC-link allows the integration of PV generators and battery strings with its submodules (SMs), whereas each SM acts as an independent voltage source due to its ability to insert/bypass the isolated DClink capacitor. In this paper, MMC topology based-split BESS along with distributed PV generators, integrated into each SM is proposed. The presented flexible energy conversion system extracts the maximum power from all distributed PV generators under substantial partial shading and allows the peak shaving to match the intermittent PV power with the variable power demand from the smart grid. With the absence of common DC-link and presence of large arm power variations, the introduced distributed PV-battery system provides balanced three-phase sinusoidal currents to the grid. A five-level three-phase MMC with proposed distributed PV-battery hybrid topology is developed. The simulation results under fast variations in solar irradiance and power demand by the grid are included, which demonstrate its superior performance.

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“…A cluster of N batteries serially connected can be divided into n low-voltage battery packs through power electronics [3]. In this way, a conventional group of batteries connected with a highpower converter is shifted to multiple flexible groups.…”

Section: Introductionmentioning

confidence: 99%

Flexible Grouping for Enhanced Energy Utilization Efficiency in Battery Energy Storage Systems

et al. 2016

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Abstract:As a critical subsystem in electric vehicles and smart grids, a battery energy storage system plays an essential role in enhancement of reliable operation and system performance. In such applications, a battery energy storage system is required to provide high energy utilization efficiency, as well as reliability. However, capacity inconsistency of batteries affects energy utilization efficiency dramatically; and the situation becomes more severe after hundreds of cycles because battery capacities change randomly due to non-uniform aging. Capacity mismatch can be solved by decomposing a cluster of batteries in series into several low voltage battery packs. This paper introduces a new analysis method to optimize energy utilization efficiency by finding the best number of batteries in a pack, based on capacity distribution, order statistics, central limit theorem, and converter efficiency. Considering both battery energy utilization and power electronics efficiency, it establishes that there is a maximum energy utilization efficiency under a given capacity distribution among a certain number of batteries, which provides a basic analysis for system-level optimization of a battery system throughout its life cycle. Quantitative analysis results based on aging data are illustrated, and a prototype of flexible energy storage systems is built to verify this analysis.

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Assessment of Fault Tolerance in Modular Multilevel Converters With Integrated Energy Storage

Cited by 70 publications

References 26 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 Reliable Modular Based PV-Battery Hybrid System with Peak Shaving Capability

Flexible Grouping for Enhanced Energy Utilization Efficiency in Battery Energy Storage Systems

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