Bi-Directional Multi-Level Converter for an Energy Storage System

Han, Sang-Hyup; Kim, Heung-Geun; Cha, Honnyong; Chun, Tae-Won; Nho, Eui‐Cheol

doi:10.6113/jpe.2014.14.3.499

Cited by 8 publications

(4 citation statements)

References 19 publications

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“…They are also used between the energy source and motor supplied by batteries [17]. In mediumpower rank devices where familiar and efficient energy storages are supercapacitors and batteries, the energy exchange between the storage device and the other components of the system requires the presence of a DC-DC converter, and such converters must have a bidirectional power flow capability and should have an adaptable control in all operation modes [31][32][33].…”

Section: Bidirectional Dc-dc Convertersmentioning

confidence: 99%

“…Multilevel inverters (MLIs) are added to counter the problems associated with twolevel converters to meet the following criteria: (i) only sinusoidal output voltage shall be produced by the converter; (ii) the converter must have an output current of low THD. The advantage of MLIs is that the device voltage rating and the switching frequency can be significantly lower under the same output voltage compared to those of a conventional two-level converter; consequently, switching losses can be decreased remarkably, thereby improving the efficiency [32,[179][180][181]].…”

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confidence: 99%

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A Review on State-of-the-Art Power Converters: Bidirectional, Resonant, Multilevel Converters and Their Derivatives

et al. 2021

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With the rapid development of modern energy applications such as renewable energy, PV systems, electric vehicles, and smart grids, DC-DC converters have become the key component to meet strict industrial demands. More advanced converters are effective in minimizing switching losses and providing an efficient energy conversion; nonetheless, the main challenge is to provide a single converter that has all the required features to deliver efficient energy for different types of modern energy systems and energy storage system integrations. This paper reviews multilevel, bidirectional, and resonant converters with respect to their constructions, classifications, merits, demerits, combined topologies, applications, and challenges; practical recommendations were also made to deliver clear ideas of the recent challenges and limited capabilities of these three converters to guide society on improving and providing a new, efficient, and economic converter that meets the strict demands of modern energy system integrations. The needs of other industrial applications, as well as the number of used elements for size and weight reduction, were also considered to achieve a power circuit that can effectively address the identified limitations. In brief, integrated bidirectional resonant DC-DC converters and multilevel inverters are expected to be well suited and highly demanded in various applications in the near future. Due to their highlighted merits, more studies are necessary for achieving a perfect level of reducing losses and components.

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Section: Bidirectional Dc-dc Convertersmentioning

confidence: 99%

mentioning

confidence: 99%

A Review on State-of-the-Art Power Converters: Bidirectional, Resonant, Multilevel Converters and Their Derivatives

et al. 2021

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“…It can use lower voltage-rated power switches, which have better switching performance than the power switches in the two-level converters [3]. Aside from energy storage systems [4], the bidirectional three-level DC-DC converter has been utilized for ultra-capacitor applications [5] and various electric vehicle charging applications [6,7]. However, it still has switching power losses as it operates under a hard switching condition [8].…”

Section: Introductionmentioning

confidence: 99%

Soft-Switching Bidirectional Three-Level DC–DC Converter with Simple Auxiliary Circuit

Choi

Yang

2019

Electronics

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This paper suggests a soft-switching bidirectional three-level DC–DC converter with a simple auxiliary circuit. The proposed converter uses auxiliary LC resonant circuits so that the power switches operate under a soft-switching condition. The resonant operation of the LC circuits makes power switches turn on at zero voltage, eliminating the turn-on switching power losses. The proposed converter improves the power efficiency, not using complex power switching circuits, but using simple LC resonant circuits. The operation of the proposed converter is described according to its operation modes. Experimental results for a 1.0 kW prototype are discussed to verify its performance. The proposed converter achieved the power efficiencies of 97.7% in the step-up mode and 97.8% in the step-down mode, respectively, for the rated load condition.

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“…Energy storage systems (ESSs) are widely used in many applications such as UPS, electrical vehicles and distributed power generation systems [1]- [3]. The voltage rating for each cell in an energy storage device (ESD) such as supercapacitors or batteries is relatively low.…”

Section: Introductionmentioning

confidence: 99%

A Bidirectional Single-Stage DC/AC Converter for Grid Connected Energy Storage Systems

Chen¹,

Liao²,

Sha³

2015

Journal of Power Electronics

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In this paper, a unified control strategy using the current space vector modulation (CSVM) technique is proposed and applied to a bidirectional three-phase DC/AC converter. The operation of the converter changes with the direction of the power flow. In the charging mode, it works as a buck type rectifier; and during the discharging mode, it operates as a boost type inverter, which makes it suitable as an interface between high voltage AC grids and low voltage energy storage devices. This topology has the following advantages: high conversion efficiency, high power factor at the grid side, tight control of the charging current and fast transition between the charging and discharging modes. The operating principle of the mode analysis, the gate signal generation, the general control strategy and the transition from a constant current (CC) to a constant voltage (CV) in the charging mode are discussed. The proposed control strategy has been validated by simulations and experimental results obtained with a 1kW laboratory prototype using supercapacitors as an energy storage device.

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Bi-Directional Multi-Level Converter for an Energy Storage System

Cited by 8 publications

References 19 publications

A Review on State-of-the-Art Power Converters: Bidirectional, Resonant, Multilevel Converters and Their Derivatives

A Review on State-of-the-Art Power Converters: Bidirectional, Resonant, Multilevel Converters and Their Derivatives

Soft-Switching Bidirectional Three-Level DC–DC Converter with Simple Auxiliary Circuit

A Bidirectional Single-Stage DC/AC Converter for Grid Connected Energy Storage Systems

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