Power processor for interfacing battery storage system to 725V DC bus

Regulation of DC‐bus voltages is important for the stable operation of different applications, like microgrids and electric vehicles, and it is usually performed by charging/discharging (C/D) batteries. Such C/D system is formed by a power converter and a control system, and it is aimed at guaranteeing the system stability and extending the battery life. To extend the battery life, it is important to reduce the battery current ripples, which is usually performed with interleaved converters and nonlinear controllers; however, most of those controllers do not provide the design procedure nor guarantee the system stability. This paper proposes a nonlinear control strategy to regulate the voltage in a DC‐bus by C/D a battery through a two‐branch interleaved Boost converter. The proposed control strategy is formed by two sliding mode controllers (SMCs), where the first one regulates the DC‐bus voltage by acting on the first converter branch and the second SMC controls the current in the second branch. The reference of the second SMC is generated from the delayed current of the first branch, in order to coordinate the controllers and to reduce the ripples in the battery current. The paper includes a procedure to design the two SMCs as well as simulation and experimental results to validate the proposed solution and to illustrate its performance. The results prove the system stability and its dynamic performance according to the design.

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“…The mathematical representation of both conditions is given in (20). The mathematical representation of both conditions is given in (20).…”

Section: Equivalent Dynamicsmentioning

confidence: 99%

Charger/discharger DC/DC converter with interleaved configuration for DC‐bus regulation and battery protection

Villegas-Ceballos

Serna-Garcés

Montoya

et al. 2019

Energy Science & Engineering

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“…In order to maintain high efficiency [3,4], the phase shift angle φ should be no more than 15°. The operation principle with fixed duty cycle D = 1/3 have been analysed in [2].…”

Section: B Operating Modesmentioning

confidence: 99%

“…v bN , v cN are lagging v aN 120°, 240° respectively. The voltages on the transformer primary side are derived in (1)(2)(3)(4)(5)(6). The voltages on secondary side are derived considering having a φ lag in phase.…”

Section: B Operating Modesmentioning

confidence: 99%

Unified modulation for three-phase current-fed bidirectional dc-dc converter under varied input voltage

Wang

2010

2010 Twenty-Fifth Annual IEEE Applied Power Electronics Conference and Exposition (APEC)

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In this paper, a new three-phase current-fed bidirectional dc-dc converter is proposed. The topology integrates a three-phase boost converter with a three-phase galvanically isolated bidirectional dc-dc converter. Keeping dc bus voltage constant allows high efficient energy conversion over a wide input voltage and maintains ZVS conditions in the whole operation range. By using compact small inductance dc inductors the ZVS conditions can be improved in low power range and the switching losses of the lower switches are reduced. At the same time the input current ripple can be alleviated by three-phase interleaved structure. Finally, a 6-kW hardware prototype is constructed and tested. The experimental results verify it can maintain high efficiency over wide input voltage and power range. I.978-1-4244-4783-1/10/$25.00 ©2010 IEEE

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“…It needs an elevated number of active devices thereby resulting in high cost. It also presents a high input and output current ripple, the soft switching only occurs on a specific operation range and the phase-shift (φ) between the two modules should not be higher than 50º in order to limit the circulating reactive power [19]. This converter is appropriate for situations in which both charging and discharging processes demand high power levels [12], which is not the case regarding the desired application, as presented hereinafter.…”

Section: Introductionmentioning

confidence: 99%

Integrated Full-Bridge-Forward DC–DC Converter for a Residential Microgrid Application

Roggia

Schuch

Baggio

et al. 2013

IEEE Trans. Power Electron.

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This paper proposes a novel integrated converter topology for interfacing between the energy storage system and the DC bus for a residential microgrid application. The proposed integrated full-bridge-forward DC-DC converter presents the following features: low number of active devices compared to the converters usually applied to similar applications, low input and output current ripple, high voltage ratio, bidirectional power flow, and galvanic isolation. A double-ended forward converter with particularities such as no extra transformer demagnetizing circuit is originated from the integration process. This converter is approached in detail in this paper, including three different clamping circuits which are analyzed and compared. The structure, principle of operation, analysis, transformer design methodology, comparison with the dual active bridge converter, and experimental results of the proposed topology are presented.Index Terms-DC bus interconnection, DC-DC converter, energy storage system, static power converter integration.

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Power processor for interfacing battery storage system to 725V DC bus

Cited by 25 publications

References 12 publications

Charger/discharger DC/DC converter with interleaved configuration for DC‐bus regulation and battery protection

Charger/discharger DC/DC converter with interleaved configuration for DC‐bus regulation and battery protection

Unified modulation for three-phase current-fed bidirectional dc-dc converter under varied input voltage

Integrated Full-Bridge-Forward DC–DC Converter for a Residential Microgrid Application

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