Switched Z-Source Isolated Bidirectional DC–DC Converter and Its Phase-Shifting Shoot-Through Bivariate Coordinated Control Strategy

Zhao, Biao; Yu, Qingguang; Leng, Zhiwei; Chen, Xiyou

doi:10.1109/tie.2011.2181136

Cited by 67 publications

(21 citation statements)

References 27 publications

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“…For example, it can be used with renewable energy sources, but it requires an additional filter at the input, which increases the system cost, volume and failure rates. Also, bidirectional operation is possible in a symmetrical configuration [42]. But it still has all the drawbacks of the ZSI, and the application range of such solutions is uncertain.…”

Section: A Converters With Full-bridge Switching Stagementioning

confidence: 99%

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A Review of Galvanically Isolated Impedance-Source DC–DC Converters

Chub

Vinnikov

Blaabjerg

et al. 2016

IEEE Trans. Power Electron.

207

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Impedance-source converters, an emerging technology in electric energy conversion, overcome limitations of conventional solutions by use of specific impedance-source networks. Focus in this paper is on the topologies of galvanically isolated impedance-source DC-DC converters. These converters are particularly appropriate for distributed generation systems with renewable or alternative energy sources which require input voltage and load regulation in a wide range. We review here the basic topologies for researchers and engineers and classify all the topologies of the impedance-source galvanically isolated DC-DC converters according to the element that transfers energy from the input to the output: a transformer, a coupled inductor, or their combination. This classification reveals advantages and disadvantages as well as a wide space for further research. The paper also outlines the most promising research directions in this field.

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Section: A Converters With Full-bridge Switching Stagementioning

confidence: 99%

“…These basic topologies could be used in different parallel-series energy conversion systems [68], [73]. The implementation of the secondary side with active switches allows bi-directional operation of basic topologies [26], [42].…”

Section: Classification and Comparison Of Is Galvanically Isolatmentioning

confidence: 99%

A Review of Galvanically Isolated Impedance-Source DC–DC Converters

Chub

Vinnikov

Blaabjerg

et al. 2016

IEEE Trans. Power Electron.

207

View full text Add to dashboard Cite

show abstract

“…Impedance source inverters (ZSIs) provide an enhanced power conversion capability with a similar functionality as boost inverters without inserting any extra active elements and with simple control strategies [11]. The concept of impedance source converters has been implemented for (i) AC-AC converters [12][13][14][15][16], (ii) DC-DC converters [17][18][19][20], (iii) AC-DC rectifiers [21][22][23][24] and (iv) DC-AC inverters [25][26][27][28][29][30][31][32][33][34]. Based on these merits, ZSIs start to penetrate various industrial application markets, such as electric vehicles [35][36][37][38][39][40], renewable energy-distributed generation [41][42][43][44][45][46], battery energy storage [47,48], and uninterruptable power supply (UPS) [49,50].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Performance Modified Discontinuous PWM Technique for Three-Phase Z-Source Inverter

et al. 2020

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Various industrial applications require a voltage conversion stage from DC to AC. Among them, commercial renewable energy systems (RES) need a voltage buck and/or boost stage for islanded/grid connected operation. Despite the excellent performance offered by conventional two-stage converter systems (dc–dc followed by dc–ac stages), the need for a single-stage conversion stage is attracting more interest for cost and size reduction reasons. Although voltage source inverters (VSIs) are voltage buck-only converters, single stage current source inverters (CSIs) can offer voltage boost features, although at the penalty of using a large DC-link inductor. Boost inverters are a good candidate with the demerit of complicated control strategies. The impedance source (Z-source) inverter is a high-performance competitor as it offers voltage buck/boost in addition to a reduced passive component size. Several pulse width modulation (PWM) techniques have been presented in the literature for three-phase Z-source inverters. Various common drawbacks are annotated, especially the non-linear behavior at low modulation indices and the famous trade-off between the operating range and the converter switches’ voltage stress. In this paper, a modified discontinuous PWM technique is proposed for a three-phase z-source inverter offering: (i) smooth voltage gain variation, (ii) a wide operating range, (iii) reduced voltage stress, and (iv) improved total harmonic distortion (THD). Simulation, in addition to experimental results at various operating conditions, validated the proposed PWM technique’s superior performance compared to the conventional PWM techniques.

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“…That is, clamped circuit or snubber mechanism for leakage energy harvesting is imperative. Isolated BDCs based on H-bridge topology have been proposed in the literature [21,22], which can achieve ZVS feature inherently, avoiding additional device usage. Nevertheless, low voltage ratio and more power switches required become their disadvantages.…”

Section: Introductionmentioning

confidence: 99%

Isolated DC-DC Converter for Bidirectional Power Flow Controlling with Soft-Switching Feature and High Step-Up/Down Voltage Conversion

Shen

Tsai

2017

Energies

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Abstract:In this paper, a novel isolated bidirectional DC-DC converter is proposed, which is able to accomplish high step-up/down voltage conversion. Therefore, it is suitable for hybrid electric vehicle, fuel cell vehicle, energy backup system, and grid-system applications. The proposed converter incorporates a coupled inductor to behave forward-and-flyback energy conversion for high voltage ratio and provide galvanic isolation. The energy stored in the leakage inductor of the coupled inductor can be recycled without the use of additional snubber mechanism or clamped circuit. No matter in step-up or step-down mode, all power switches can operate with soft switching. Moreover, there is a inherit feature that metal-oxide-semiconductor field-effect transistors (MOSFETs) with smaller on-state resistance can be adopted because of lower voltage endurance at primary side. Operation principle, voltage ratio derivation, and inductor design are thoroughly described in this paper. In addition, a 1-kW prototype is implemented to validate the feasibility and correctness of the converter. Experimental results indicate that the peak efficiencies in step-up and step-down modes can be up to 95.4% and 93.6%, respectively.

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Switched Z-Source Isolated Bidirectional DC–DC Converter and Its Phase-Shifting Shoot-Through Bivariate Coordinated Control Strategy

Cited by 67 publications

References 27 publications

A Review of Galvanically Isolated Impedance-Source DC–DC Converters

A Review of Galvanically Isolated Impedance-Source DC–DC Converters

Enhanced Performance Modified Discontinuous PWM Technique for Three-Phase Z-Source Inverter

Isolated DC-DC Converter for Bidirectional Power Flow Controlling with Soft-Switching Feature and High Step-Up/Down Voltage Conversion

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