Feasibility Study of Interleaving Approach for Quasi-Z-Source Inverter

Stepenko, Serhii; Husev, Oleksandr; Vinnikov, Dmitri; Fesenko, Artem; Matiushkin, Oleksandr

doi:10.3390/electronics9020277

Cited by 8 publications

(13 citation statements)

References 34 publications

(40 reference statements)

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“…By introducing the switching function in the equations of the system (2)-( 16), averaging throughout the whole period dt and simplifying the derivatives, the Equations ( 17)- (19) are obtained.…”

Section: Converter Analysismentioning

confidence: 99%

“…This topology was introduced in [17] and since then it has been used in inverters [18]. The Z-source can regulate the DC bus voltage in Electronics 2022, 11, 2074 2 of 18 inverters, being its switching technique compatible with that of most techniques used for inverters [19,20]. Making modifications on the Z-source circuit, the qZ-source is obtained as can be seen in [21].…”

Section: Introductionmentioning

confidence: 99%

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Improvement of the Coupling of Renewable Sources through Z-Source Converters Based on the Study of Their Dynamic Model

Lanagrán

Ortega

et al. 2022

Electronics

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The classical coupling of renewable energy sources greatly limits the coupling power and the output voltage of the coupled sources. Moreover, it does not eliminate the randomness of the sources. In this work a renewable sources coupling with high randomness is obtained by series connection of the output terminals of Z-source converters. To achieve the coupling, the stationary and dynamic models of a Z-source-based converter have been studied. With the results of the stationary model, the converter behavior has been evaluated as a function of its parameters and a method for calculating the Z-network parameters has been implemented. Moreover, with the dynamic model a controller has been designed for all the converters. The main contributions of this work are the coupling of the sources, the stationary and dynamic models obtained and their analysis. The coupling achieves a stable supply avoiding the sources’ randomness reaching the load. A system composed of a wind turbine, a set of photovoltaic panels and two groups of batteries has been modeled. To study the system behavior and the supply quality, several aggressive tests have been forced and experimental evidence has also been provided.

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Section: Converter Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Improvement of the Coupling of Renewable Sources through Z-Source Converters Based on the Study of Their Dynamic Model

Lanagrán

Ortega

et al. 2022

Electronics

View full text Add to dashboard Cite

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“…Another perspective method to decrease the size of passive components is using an interleaved approach [32][33][34][35][36][37][38]. In a general case, this method assumes use of two parallel circuits with the phase shift of control signals.…”

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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“…The substantial progress of modern power inverters is well underway for the penetration of renewable energy sources into power systems and many other industrial applications [1]. The Impedance Source Inverters (also called Z-Source Inverters or ZSIs) form a class of high-performance, highly reliable, and highly efficient yet low-cost inverters equipped with an X-shaped impedance circuit that enables shoot-through state [2,3]. Hence, they can overcome the limitations of traditional inverters and fulfill both buck and boost capability in a single-stage topology without the necessity for any kind of delays [4,5].…”

Section: Introductionmentioning

confidence: 99%

Optimal Robust LQI Controller Design for Z-Source Inverters

et al. 2020

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This paper investigates the linear quadratic integral (LQI)-based control of Z-source inverters in the presence of uncertainties such as parameter perturbation, unmodeled dynamics, and load disturbances. These uncertainties, which are naturally available in any power system, have a profound impact on the performance of power inverters and may lead to a performance degradation or even an instability of the system. A novel robust LQI-based design procedure is presented to preserve the performance of the inverter against uncertainties while a proper level of disturbance rejection is satisfied. The stability robustness of the system is also studied on the basis of the maximum sensitivity specification. Moreover, the bat algorithm is adopted to optimize the weighting matrices. Simulation results confirm the effectiveness of the proposed controller in terms of performance and robustness.

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Feasibility Study of Interleaving Approach for Quasi-Z-Source Inverter

Cited by 8 publications

References 34 publications

Improvement of the Coupling of Renewable Sources through Z-Source Converters Based on the Study of Their Dynamic Model

Improvement of the Coupling of Renewable Sources through Z-Source Converters Based on the Study of Their Dynamic Model

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

Optimal Robust LQI Controller Design for Z-Source Inverters

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