Single Phase AC-AC Solid State Transformer based on Single Conversion Stage

Rahman, Arief Noor; Chen, Shengkai; Chiu, Huang‐Jen

doi:10.1109/wipdaasia.2019.8760310

Cited by 6 publications

(3 citation statements)

References 6 publications

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“…This improvement enhances system stability and compactness. Compared to the literature [19], the SST proposed in this paper reduces the use of switches and inductors, thereby reducing switch conduction losses and hardware costs. Although the topology in this paper adopts a half-bridge structure on the primary side, resulting in a doubling of the effective current, the proper selection of switch devices allows this topology to achieve higher power density with fewer components, a smaller size, and a lower system cost.…”

Section: Parametersmentioning

confidence: 99%

“…Although the DAB converter has the ability to achieve higher conversion efficiency through good ZVS capability, as well as a reduced root-mean-square (RMS) and reactive power, the load and voltage-dependent ZVS characteristics make it unsuitable for direct AC-AC conversion applications [18]. In [19], a single-stage AC-AC SST-adopted series resonant converter (SRC) is presented, and it achieves the goal of higher efficiency. In [20], a single-stage matrix-type SST based on a current-fed SRC is proposed, achieving zero voltage switching of the primary side switches over a relatively wide range of input voltage.…”

Section: Introductionmentioning

confidence: 99%

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Innovative Matrix-Type AC-AC Solid-State Transformer Eliminating Ripple Power with Double-Grid Frequency

Wang,

Yu,

Wang

et al. 2024

Energies

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Single-phase solid-state transformers (SSTs) have the advantages of a compact structure, higher reliability, and multiple functions, and have been widely studied. However, bulky energy storage elements and inherent ripple power with double-grid frequency issues are the main disadvantages of conventional single-phase SSTs. This paper presents a single-phase matrix-type AC-AC SST eliminating ripple power with double-grid frequency. The presented SST consists of a line-frequency-commutated rectifier without bulky DC-link capacitors, an LLC resonant converter, a buck converter, and a line-frequency-commutated inverter. The LLC operates efficiently with a fixed voltage gain, and the buck converter provides a voltage regulation function. As a result, high conversion efficiency, high power density, and potentially high reliability are achieved. A 1 kW SST prototype is developed and tested to validate the feasibility and functionality of the proposed methods.

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Section: Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Innovative Matrix-Type AC-AC Solid-State Transformer Eliminating Ripple Power with Double-Grid Frequency

Wang,

Yu,

Wang

et al. 2024

Energies

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show abstract

“…The isolated AC-AC converter with a high-frequency link is the basic building block of solid-state transformers [1]- [10]. Many topologies and architectures can be found in the literature, the oldest being that proposed in [1] and [2].…”

Section: Introductionmentioning

confidence: 99%

Isolated AC/AC Converter With LLC Resonant Converter High-Frequency Link and Four-Quadrant Switches in the Output Stage

2020

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An AC-AC converter with a high-frequency link employing an LLC resonant converter operating in the vicinity of the resonance frequency was studied, in which a single output power stage is used, formed by a high-frequency AC-AC converter employing four-quadrant switches. The topology, its operation and the modulation strategy are described. The high-frequency stage switches located on the primary side of the transformer operate with soft switching of the ZVS type, while the four-quadrant switches that form the output stage operate with soft switching of the ZCS type. Experimental data obtained with a 1.5 kW experimental prototype (input 220 VRMS, output 220 VRMS and switching frequency 40 kHz), which was designed, built and tested in the laboratory, are reported herein. This converter can be considered a candidate for the building block of medium voltage solid-state transformers (SST) for power distribution systems.

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Dynamic Modeling and Closed-Loop Control of a Solid-State Transformer (SST) Based on Series Resonant Converter (SRC)

Bhawal

Chakraborty

Hatua

2022

IEEE J. Emerg. Sel. Topics Power Electron.

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Single Phase AC-AC Solid State Transformer based on Single Conversion Stage

Cited by 6 publications

References 6 publications

Innovative Matrix-Type AC-AC Solid-State Transformer Eliminating Ripple Power with Double-Grid Frequency

Innovative Matrix-Type AC-AC Solid-State Transformer Eliminating Ripple Power with Double-Grid Frequency

Isolated AC/AC Converter With LLC Resonant Converter High-Frequency Link and Four-Quadrant Switches in the Output Stage

Dynamic Modeling and Closed-Loop Control of a Solid-State Transformer (SST) Based on Series Resonant Converter (SRC)

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