A three level neutral point clamped Inverter with buck-boost capability for renewable energy sources

Mathew, Raj; Jiji, K S

doi:10.1049/cp.2011.0361

Cited by 9 publications

(2 citation statements)

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“…An alternative is to use single-stage buck-boost for a single input dc source. In this solution, inverters with an active boost cell are used [13][14][15][16]. They can provide very 2 of 17 high boost of the input voltage but suffer from high current spikes in semiconductors and passive elements.…”

Section: Introductionmentioning

confidence: 99%

Design and Experimental Validation of a Single-Stage PV String Inverter with Optimal Number of Interleaved Buck-Boost Cells

et al. 2021

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Increasing converter power density is a problem of topical interest. This paper discusses an interleaved approach of the efficiency increase in the buck-boost stage of an inverter with unfolding circuit in terms of losses in semiconductors, output voltage ripples and power density. Main trends in the power converter development are reviewed. A losses model was designed and used for the proposed solution to find an optimal number of interleaved cells. It describes static and dynamic losses in semiconductor switches for buck and boost mode. The presented calculation results demonstrate the efficiency of the interleaved approach for photovoltaic system. 1 kW power converter prototype was designed with two parallel dc-dc cells for experimental verification of obtained theoretical results. The experimental results confirm theoretical statements.

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Section: Introductionmentioning

confidence: 99%

Design and Experimental Validation of a Single-Stage PV String Inverter with Optimal Number of Interleaved Buck-Boost Cells

et al. 2021

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“…A converter that accepts different storage elements is preferable.Several single-stage alternatives were presented as alternative solutions. Inverters with an active boost cell were described in [6][7][8][9]. These inverters provide very high boost of the input voltage but suffer from high current spikes in the semiconductors and passive elements.…”

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confidence: 99%

Bidirectional Twisted Single-Stage Single-Phase Buck-Boost DC-AC Converter

et al. 2019

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This paper describes a bidirectional twisted single-phase single-stage buck-boost dc-ac converter based on an output unfolding circuit. This solution is derived by the combination of an inverting buck-boost dc-dc converter and an unfolding circuit. The operation principle, component design guidelines, along with the control approach are presented. The zero-crossing distortion problem is discussed and solved by a simple approach. The simulation and experimental results confirm all theoretical statements. Loss distribution and achievable efficiency are analyzed. Finally, the pros and cons of the proposed solution, along with the most promising application field, are analyzed and discussed in the conclusion.Another application field of the dc-ac converter with wide input voltage regulation is battery storage. Lithium-ion batteries are targeted to become the most popular choice for on-grid and grid-off solar battery storage in the foreseeable future. Such types of batteries have a wide range of input voltage. A converter that accepts different storage elements is preferable.Several single-stage alternatives were presented as alternative solutions. Inverters with an active boost cell were described in [6][7][8][9]. These inverters provide very high boost of the input voltage but suffer from high current spikes in the semiconductors and passive elements. Impedance-source networks have been reported in many research papers as a promising single-stage solution. Z-source inverters (ZSIs) and quasi-Z-source inverters (qZSIs) were proposed for different applications. Existing solutions were reviewed in [10][11][12][13][14], and different relevant issues are addressed in [15][16][17][18][19][20]. However, recent research revealed evident drawbacks of the IS-based converters in terms of power density and efficiency [21][22][23].Split-source inverters (SPIs) [24,25] were proposed as another alternative solution. According to the literature, SPIs have less passive component counts accompanied by higher voltage and current stresses at lower voltage gains, and they do not have short circuit immunity.Several interesting single-stage buck-boost inverters were proposed in [26][27][28][29]. At the same time all of them did not find industrial application. For example, the solution [26] requires reverse-blocking IGBTs, while others are quite complex solutions.An Aalborg inverter ( Figure 1b) is proposed as an inverter that combines buck and boost functionality [30][31][32][33][34][35]. These solutions have two independent buck-boost stages that are responsible for output sinusoidal voltage generation. The main advantage of the proposed solution is in the minimum voltage drop of the filtering inductors in the power loop at any time. At the same time, this solution uses a double number of semiconductors and an inductor in the buck and boost stage, which is an obvious drawback. Another drawback consists in the two power sources utilization. A similar idea with double components is discussed in [36].The solution based on the input boost a...

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Wind power grid interfacing using 3 level vs 5 level inverter with SEPIC converter

Kumar

Singh

2017

2017 1st International Conference on Electronics, Materials Engineering and Nano-Technology (IEMENTech)

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A three level neutral point clamped Inverter with buck-boost capability for renewable energy sources

Cited by 9 publications

References 0 publications

Design and Experimental Validation of a Single-Stage PV String Inverter with Optimal Number of Interleaved Buck-Boost Cells

Design and Experimental Validation of a Single-Stage PV String Inverter with Optimal Number of Interleaved Buck-Boost Cells

Bidirectional Twisted Single-Stage Single-Phase Buck-Boost DC-AC Converter

Wind power grid interfacing using 3 level vs 5 level inverter with SEPIC converter

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