Soft-Switching PWM Technique for Grid-Tie Isolated Bidirectional DC–AC Converter With SiC Device

Sayed, Mahmoud A.; Suzuki, Kazuhiro; Takeshita, Toru; Kitagawa, Wataru

doi:10.1109/tia.2017.2731738

Cited by 43 publications

(18 citation statements)

References 35 publications

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“…Various soft switching methods were proposed for DAB matrix converters. [7][8][9] In Reference 7, soft switching is implemented through combining direction of current flowing in transformer with switching sequence. However, duty ratios are calculated using approximated waveforms of transformer current; hence the problem of big distortion in grid current.…”

Section: Introductionmentioning

confidence: 99%

Surge voltage reduction method for dual active bridge matrix converter using circulating current

Takuma

Itoh

2021

Electrical Engineering Japan

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This paper proposes an extended method of zero-voltage switching (ZVS) range for a dual active bridge (DAB) matrix converter with a discontinuous current mode (DCM). In the traditional DAB converter, ZVS cannot be achieved at a light load condition. The duty ratio calculation to achieve power factor correction and ZVS is explained using a circulating current. From the experimental results using a 5-kW prototype, the ZVS operation with zero transmission power is achieved by increasing the circulating current. In addition, the grid current distortion is lower than 5.0% at the rated power regardless of the DC voltage variation of plus or minus 20%.

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Section: Introductionmentioning

confidence: 99%

Surge voltage reduction method for dual active bridge matrix converter using circulating current

Takuma

Itoh

2021

Electrical Engineering Japan

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“…The same topology is used in this paper for a BSS, in which the battery terminals replace the HVDC transmission system terminals. Unfortunately, the presented PWM switching techniques in [14], [15] result in grid currents problems, in which the three-phase grid currents have a THD of more than 10%, which exceeds the IEEE standard's grid permissible limits. From the understanding gained, few studies have focused on the grid current problems.…”

Section: Introductionmentioning

confidence: 99%

Modulation and Control of a DC-AC Converter With High-Frequency Link Transformer for Grid-Connected Applications

Sayed

Takeshita

Iqbal³

et al. 2021

IEEE Access

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The need to integrate energy storage devices with renewable energy sources and improve the employed converters' modulation and control techniques continues to grow. This trend is further activated by utilizing new converter topologies, such as high-frequency (HF) link converters. A dc-ac with HF link isolated converter is presented in this paper to integrate a battery storage device with a three-phase grid. The proposed converter is composed of two stages. The first stage is a direct three-phase to single-phase bidirectional Matrix Converter (3⨯1 MC), which converts the standard three-phase voltages to a single-phase HF waveform. Besides, the MC ensures three-phase sinusoidal grid currents with a unity power factor (UPF). The second stage of the proposed topology is an H-Bridge Converter (HBC), which converts the battery dcvoltage to a single-phase HF waveform synchronized with that of the single-phase output of the MC. Therefore, HF terminals of both stages have been linked by a single-phase HF transformer that provides galvanic isolation to the system. Also, a new mathematical model has been presented to obtain the accurate duty cycles of all matrix converter switches. Moreover, a new Pulse Width Modulation (PWM) technique of the analyzed converter with the controllable voltage limits is introduced. A simple control method is presented to regulate the battery dc-current and match reference value using a single PI controller. A laboratory prototype-based 200V, 2kW has been carried out to investigate the proposed technique's validity.INDEX TERMS DC-AC-AC converter, isolated grid-connected converter, matrix converter, PWM.

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“…Different modulation strategies based on the topology shown in Fig. 2 have been proposed in [27] and [28]. In [27], the dc-side H-bridge is operated with square-wave modulation and a quasi-square wave is applied from the ac side with the max and the mid ac line-line voltage.…”

Section: Section I Introductionmentioning

confidence: 99%

“…2 have been proposed in [27] and [28]. In [27], the dc-side H-bridge is operated with square-wave modulation and a quasi-square wave is applied from the ac side with the max and the mid ac line-line voltage. The HF inductor current is assumed to be a square waveform for the determination of duty cycles of the primary voltages and the power.…”

Section: Section I Introductionmentioning

confidence: 99%

A Bidirectional Soft-Switched DAB-Based Single-Stage Three-Phase AC–DC Converter for V2G Application

Das

Weise

Basu

et al. 2019

IEEE Trans. Transp. Electrific.

157

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In vehicle-to-grid applications, the battery charger of the electric vehicle (EV) needs to have a bidirectional power flow capability. Galvanic isolation is necessary for safety. An ac-dc bidirectional power converter with high-frequency isolation results in high power density, a key requirement for an on-board charger of an EV. Dual-active-bridge (DAB) converters are preferred in medium power and high voltage isolated dc-dc converters due to high power density and better efficiency. This paper presents a DAB-based three-phase ac-dc isolated converter with a novel modulation strategy that results in: 1) single-stage power conversion with no electrolytic capacitor, improving the reliability and power density; 2) open-loop power factor correction; 3) soft-switching of all semiconductor devices; and 4) a simple linear relationship between the control variable and the transferred active power. This paper presents a detailed analysis of the proposed operation, along with simulation results and experimental verification.

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Soft-Switching PWM Technique for Grid-Tie Isolated Bidirectional DC–AC Converter With SiC Device

Cited by 43 publications

References 35 publications

Surge voltage reduction method for dual active bridge matrix converter using circulating current

Surge voltage reduction method for dual active bridge matrix converter using circulating current

Modulation and Control of a DC-AC Converter With High-Frequency Link Transformer for Grid-Connected Applications

A Bidirectional Soft-Switched DAB-Based Single-Stage Three-Phase AC–DC Converter for V2G Application

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