A Venturini based modulation technique for a new isolated AC/AC power converter

Nasir, Usman; Rivera, Marco; Costabeber, Alessandro; Wheeler, Patrick

doi:10.1109/iecon.2016.7794115

Cited by 6 publications

(3 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…No fast or time-critical voltage or current measurements are required to implement the proposed commutation. The specific case study has been chosen considering the potential use of the matrix-based single-phase SST topology as the fundamental building block for a new breed of multi-modular power converter architectures for grid connected applications [17]. These new concepts will combine the advantages of an SST with those of a modular, flexible and scalable structure which can be adapted to different voltage levels and frequencies.…”

Section: Introductionmentioning

confidence: 99%

A Leakage-Inductance-Tolerant Commutation Strategy for Isolated AC/AC Converters

Nasir

Costabeber

Rivera

et al. 2019

IEEE J. Emerg. Sel. Topics Power Electron.

Self Cite

View full text Add to dashboard Cite

This paper proposes a generalised commutation strategy suitable for matrix-based isolated AC/AC conversion stages in Solid State Transformers for use whenever there is nonnegligible leakage inductance in the isolation transformer. The standard 4-step commutation used in matrix converters can no longer be applied when transformer leakage inductance is present, as overrated switching devices or dissipative snubbers would be necessary, reducing the attractiveness of the topologies that include matrix-based isolated AC/AC stages. A case study of a single-phase AC/AC converter has been investigated in detail to demonstrate the application of the proposed commutation method to a topology that has recently been identified as the potential building block for future multi-modular AC/AC converters for grid applications. The proposed leakage-inductance-tolerant commutation strategy is based on the definition of a current decoupling phase in the commutation sequence and only needs suitable timing of the commutation steps, without high bandwidth voltage or current measurements. Matching simulations and experimental results from a 3kW laboratory scale prototype are presented to support the effectiveness of the proposed strategy.

show abstract

Section: Introductionmentioning

confidence: 99%

A Leakage-Inductance-Tolerant Commutation Strategy for Isolated AC/AC Converters

Nasir

Costabeber

Rivera

et al. 2019

IEEE J. Emerg. Sel. Topics Power Electron.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Since isolation, modularity and flexibility are the key requirements of future electrical networks [5], a new singlestage Modular Isolated Matrix Converter (MIMC) topology was proposed in [28]. As shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

“…As discussed above, the topology has already been proposed in [28]. However, only the principle of operation and a preliminary set of simulations were discussed.…”

Section: Introductionmentioning

confidence: 99%

A Three-Phase Modular Isolated Matrix Converter

Nasir

Costabeber

Wheeler

et al. 2019

IEEE Trans. Power Electron.

Self Cite

View full text Add to dashboard Cite

This paper discusses the analysis, design and experimental validation of a Modular Isolated Matrix Converter (MIMC), including modulation, commutation and control. The MIMC topology is a single-stage high power density AC/AC converter which is attractive for traction applications and spacerestricted LV or MV future distribution networks. The topology under study utilises bi-directional switches based dual-activebridge cells as basic building blocks. A single-cell would have limited practical application as the output frequency is locked to the input one. On the contrary, the repetition of single cells proposed in the MIMC extending the matrix converter concept, achieves variable frequency operation while also providing a modular structure. However, the presence of Medium Frequency (MF) transformers in each cell poses additional challenges for modulation and safe-commutation that are discussed and solved in the paper. Experimental results from a proof-of-concept 6kW laboratory scale prototype validate the practical feasibility and the operation of the MIMC.

show abstract