Power and Voltage Balance Control of a Novel Three-Phase Solid-State Transformer Using Multilevel Cascaded H-Bridge Inverters for Microgrid Applications

Wang, Liang; Zhang, Donglai; Wang, Yi; Wu, Bin; Athab, H.S.

doi:10.1109/tpel.2015.2450756

Cited by 252 publications

(88 citation statements)

References 23 publications

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“…12). The application of power electronic converters as distribution transformers has become a wide area of interest of many research centers [40][41][42][43]. Although SST structure is much more complex as compared to the conventional transformer, it may eliminate some of its disadvantages and add completely new functionalities, e.g.…”

Section: Cmc In Recent Research and Applicationsmentioning

confidence: 99%

Cascaded multilevel converters in recent research and applications

Malinowski

2017

Bulletin of the Polish Academy of Sciences Technical Sciences

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Abstract. Multilevel converters have been intensively investigated and developed since 1960s and have found successful industrial applications. The aim of this paper is to present state of the art as well as recent research and applications of cascaded multilevel converters, which are a very interesting solution for power distribution systems and renewable energy sources. Cascaded multilevel converters can easily operate at medium and high voltage based on the series connection of power modules (cells), which use standard low-voltage component configurations. Series connections of modules (cells) allow for high quality output voltages and input currents, reduction of passive components and availability of component redundancy. Due to these features the cascaded multilevel converters have been recognized as attractive solutions for high-voltage direct-current (HVDC) transmission, solid state transformers (SST) and photovoltaic (PV) systems.Key words: multilevel converters, cascaded converters, modular multilevel converters, modulation, solid state transformer, photovoltaic systems. Cascaded multilevel converters in recent research and applications M. MALINOWSKIInstitute of Control and Industrial Electronics, Warsaw University of Technology, 75 Koszykowa St., 00-662 Warsaw, Poland for multilevel structures. Among the main benefits one may count a superior harmonic spectrum for a given switching frequency, a lower dv/dt stress at the converter terminals, cables and end windings of transformers/generators, a lower common mode voltage, and substantially lower semiconductor switching losses, particularly at medium to higher switching frequencies. A three-level topology is also a highly competitive alternative to the two-level structure in terms of cost, efficiency, and weight/size [2].The final choice of converter topology for RES depends on type of application, expected power, reliability demand and price. Three-phase multilevel converters, e.g. three-level neutral point clamped (3L-NPC) [3][4][5][6], three-level transistor clamped (3L-TCC) [4] or five-level active neutral point clamped (5L-ANPC) [7][8][9] are most popular in high power applications. However, 3L-NPC converters may be considered even in power range of few hundreds kVA, which was discussed in [2].

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Section: Cmc In Recent Research and Applicationsmentioning

confidence: 99%

Cascaded multilevel converters in recent research and applications

Malinowski

2017

Bulletin of the Polish Academy of Sciences Technical Sciences

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“…However, the control algorithm may not be available in FGBESSs because fault signals are not always accessible, even from a real-time state-of-health monitoring system. Carnielutti and Wang et al [13,14] proposed a method to maintain continuous operation and SOC balancing of the remaining healthy battery units by shifting the neutral point with a star configuration. However, the original voltages in normal operating conditions still cannot be achieved, and this approach can only be applied in three-phase three-wire systems.…”

Section: Introductionmentioning

confidence: 99%

Fault-Tolerant Control for a Flexible Group Battery Energy Storage System Based on Cascaded Multilevel Converters

et al. 2018

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Abstract:A flexible group battery energy storage system (FGBESS) based on cascaded multilevel converters is attractive for renewable power generation applications because of its high modularity and high power quality. However, reliability is one of the most important issues and the system may suffer from great financial loss after fault occurs. In this paper, based on conventional fundamental phase shift compensation and third harmonic injection, a hybrid compensation fault-tolerant method is proposed to improve the post-fault performance in the FGBESS. By adjusting initial phase offset and amplitude of injected component, the optimal third harmonic injection is generated in an asymmetric system under each faulty operation. Meanwhile, the optimal redundancy solution under each fault condition is also elaborated comprehensively with a comparison of the presented three fault-tolerant strategies. This takes full advantage of battery utilization and minimizes the loss of energy capacity. Finally, the effectiveness and feasibility of the proposed methods are verified by results obtained from simulations and a 10 kW experimental platform.

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“…The CHMLI is very adaptive to photovoltaic systems applications because of its dispatching capability [10]. Due to the importance of levels harmonization in the voltage output many studies have concentrated their efforts on DC power and voltage balance control [11], [12].The control technique in the case of power bank use, relies on the state of charge balancing of DC power storage units (lead acid batteries, capacitors, etc.) [13]- [15].…”

Section: Introductionmentioning

confidence: 99%

A Cascaded H-Bridge Multilevel Inverter with SOC Battery Balancing

Khalili¹,

Raihani²,

Bouattane³

et al. 2017

ijacsa

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Abstract-In this paper, we present a single phase 5 levels HBridge multilevel inverter (CHMLI) with battery balancing technique. Each single full bridge is directly connected to a battery inside the power bank. The different combinations and batteries wiring sets offer the possibility to control the batteries discharge. The cascaded H-Bridge multilevel inverter is first described and the discharge is studied in normal conditions under different stress scenarios. State of charge (SOC) balancing technique is then achieved using an equalization algorithm controlling the different switching combination inside the power bank. Results of the simulation model with and without the SOC balancing is presented using Matlab.

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Power and Voltage Balance Control of a Novel Three-Phase Solid-State Transformer Using Multilevel Cascaded H-Bridge Inverters for Microgrid Applications

Cited by 252 publications

References 23 publications

Cascaded multilevel converters in recent research and applications

Cascaded multilevel converters in recent research and applications

Fault-Tolerant Control for a Flexible Group Battery Energy Storage System Based on Cascaded Multilevel Converters

A Cascaded H-Bridge Multilevel Inverter with SOC Battery Balancing

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