Single-phase semi-bridge five-level flying-capacitor rectifier

Teixeira, C. A.; Holmes, D.G.; McGrath, Brendan

doi:10.1109/ecce.2012.6342803

Cited by 11 publications

(20 citation statements)

References 15 publications

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“…The same disadvantage is identified in the nine-level topology proposed in [21]. In [22], [23], and [24] new multilevel topologies are proposed but only operate in unidirectional mode, i.e., receiving power from the grid to dc-link, maintaining the principle of operation of the power factor correction topologies. In [25], [26] and [27], five-level topologies are proposed, but they require more capacitors or more controlled semiconductors, representing the fundamental disadvantage when confronted with the proposal of this paper.…”

Section: Introductionmentioning

confidence: 86%

A Novel Multilevel Converter for On-Grid Interface of Renewable Energy Sources in Smart Grids

Monteiro

Sousa

Sepúlveda

et al. 2019

2019 International Conference on Smart Energy Systems and Technologies (SEST)

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The on-grid interface of renewable energy sources involves a dc-ac converter for controlling the injected current. In this perspective, a novel topology of grid-tied converter is proposed, assuming as main feature the produced multilevel voltages (five-levels). The proposed grid-tied converter is intended for on-grid interfaces, which is controlled for guaranteeing sinusoidal currents for all grid voltage conditions. The dc-side can be linked directly to a dc-to-dc intermediary converter, responsible for interfacing renewable energy sources, as solar photovoltaic or wind power systems. Throughout the paper, a complete examination of the operation principle and the adopted control theory, including current control, as well as hardware project, are comprehensively presented. An accurate computational simulation validation is presented, comprising realistic operating conditions in terms of grid voltage disturbances and operating power. The obtained results prove the advantages of the proposed grid-tied multilevel converter, and establish a comparison with the classical solutions.

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Section: Introductionmentioning

confidence: 86%

A Novel Multilevel Converter for On-Grid Interface of Renewable Energy Sources in Smart Grids

Monteiro

Sousa

Sepúlveda

et al. 2019

2019 International Conference on Smart Energy Systems and Technologies (SEST)

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“…Finally, the voltage balancing loop eliminates the imbalance between the dc capacitor voltages. Similar requirements also exist in FC-type rectifier [10], and CHB-type rectifier [11]. Although the PUC-type rectifier topology is the simplest topology among the multilevel rectifier topologies, but it is not mature yet and did not find any application in the industry due to its complicated control structure [12].…”

Section: Introductionmentioning

confidence: 92%

“…In the last two decades, multilevel converters are emerged as an alternative topology to be employed at medium and high voltage levels [6]. As in the case of two-level converters, voltage-source based multilevel converters are more popular which can be categorized as neutral point clamped (NPC) [7]- [9], flying capacitor (FC) [10], cascaded H-bridge (CHB) [11], packed-U-cell (PUC) [12], T-type [13], and hybrid type [14]- [16].…”

Section: Introductionmentioning

confidence: 99%

Sliding-Mode Control Strategy for Three-Phase Three-Level T-Type Rectifiers With DC Capacitor Voltage Balancing

Bayhan

Kömürcügil

2020

IEEE Access

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A sliding mode control (SMC) strategy with dc capacitor voltage balancing is proposed for three-phase three-level T-type rectifiers. The proposed SMC strategy is designed in the abc frame rather than the dq frame. In this case, the necessity of three-phase current transformations is eliminated. The proposed SMC is based on the errors of the line currents. The amplitude of line current references is generated by controlling the dc voltage using a proportional-integral (PI) controller. In order to obtain unity power factor, the generated reference amplitude is multiplied by the corresponding sinusoidal waveform obtained from the phase locked loop (PLL) operating with grid voltages. The dc capacitor voltage balancing is achieved by adding a proportional control term into the line current reference obtained for each rectifier leg. The performance of the proposed control strategy is validated by simulations and experiments during steady-state, transients caused by load change, and unbalanced grid conditions. The results show that the proposed control strategy offers excellent steady-state and dynamic performances with low THD in the line currents, zero steady-state error in the output voltage, and very fast dynamic response.

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“…Therefore, the dominant harmonic content is increased to a further high frequency and the requirement for passive elements is reduced. The second topology is a multi-level circuit topology [4][5][6][7][8][9][10]. A multi-level circuit topology integrates several power converters in series and generates more levels of output voltage, so the amplitude of the dominant harmonic content is reduced and the requirement for passive elements is also reduced.…”

Section: Introductionmentioning

confidence: 99%

A grid‐tied power conversion interface with a five‐level inverter

Jou

Chen

2017

IET Power Electronics

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This study proposes a novel grid-tied power conversion interface that connects a renewable energy source to the utility. The proposed grid-tied power conversion interface is composed of an H-bridge inverter, a selection switch set and a boost power converter. The proposed grid-tied power conversion interface generates a five-level AC voltage. The boost power converter is only operated when the magnitude of the utility voltage is greater than the voltage of the renewable energy source. A part of the power from the renewable energy source is directly converted to AC power via the selection switch set and the Hbridge inverter. Therefore, the power conversion efficiency of the proposed grid-tied power conversion interface is improved. The proposed grid-tied power conversion interface contains only six power electronic switches so the power circuit is simplified. The performance of the proposed grid-tied power conversion interface is verified experimentally. 2 Circuit configuration Since the input voltage for the conventional small-capacity distributed power generation system is low, two power conversion stages are generally used to interface the renewable energy source

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Single-phase semi-bridge five-level flying-capacitor rectifier

Cited by 11 publications

References 15 publications

A Novel Multilevel Converter for On-Grid Interface of Renewable Energy Sources in Smart Grids

A Novel Multilevel Converter for On-Grid Interface of Renewable Energy Sources in Smart Grids

Sliding-Mode Control Strategy for Three-Phase Three-Level T-Type Rectifiers With DC Capacitor Voltage Balancing

A grid‐tied power conversion interface with a five‐level inverter

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