Multiple-Input Soft-Switching Step-up/down Converter for Renewable Energy Systems

Sun, Zhuoya; Bae, Sungwoo

doi:10.1109/icrera.2018.8567017

Cited by 4 publications

(4 citation statements)

References 11 publications

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“…Ref. [5] studied a topology structure in which two bidirectional DC-DC converters are connected to the DC bus. This structure can prolong the service life of the battery and improve the maximum power output capability of a hybrid energy storage system etc.…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of a Step-Up Multi-Port Converter Applicable for Energy Conversion in Photovoltaic Battery Systems

Shi,

Xu,

Jiang

et al. 2023

Energies

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Aiming at the problems of large power fluctuations and poor stability in photovoltaic and other new energy power generation systems, a step-up multiport converter (MPC) that can simultaneously connect low-voltage photovoltaic cells, batteries, and loads (independent loads or power grids) is proposed in this manuscript. According to the possible operating conditions of the system, the working principles are described in detail. Theoretical analysis based on different working modes is presented and a hybrid modulation control method including pulse width modulation (PWM) and phase shift modulation (PSM) are applied to realize energy transmission between photovoltaics, batteries, and power grids. A simulation model is built in the PSIM environment to validate each working state of the system and mode switching function. Experiments are carried out on an experimental platform using the dsPIC33FJ64GS606 digital microcontroller as the control center, and the experimental results successfully verify the system function and PWM + PSM control efficiency.

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Section: Introductionmentioning

confidence: 99%

Design and Analysis of a Step-Up Multi-Port Converter Applicable for Energy Conversion in Photovoltaic Battery Systems

Shi,

Xu,

Jiang

et al. 2023

Energies

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“…The disadvantage of this converter is the control, which is difficult because the transistor is floating, and the output voltage polarity is opposite to that of the input voltage. In the literature, different Buck-Boost-type topologies can be found, beginning with a buck-boost converter with positive output voltage, presented in [35], a bidirectional buck-boost converter [36][37][38], cascaded [39], quadratic [40] or multi-input converters [41,42], etc. Also, the classical Ćuk, SEPIC and ZETA converters [13,61] are of step-up/step-down nature.…”

Section: Introductionmentioning

confidence: 99%

A New SEPIC-Based DC-DC Converter with Coupled Inductors Suitable for High Step-Up Applications

2021

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In this paper, a new hybrid SEPIC dc-dc converter with coupled inductors suitable for photovoltaic applications is presented. First, how the new topology was derived will be presented, continuing with its analysis and design equation as a standalone dc-dc topology. The analysis will consist of a steady-state equations derivation, a static conversion ratio calculation based on which the semiconductor voltage and current stresses are evaluated and states the continuous conduction mode (CCM) operation conditions. The converter will then be simulated as a first validation of the theory using the dedicated Caspoc power electronics package. To finally validate the theoretical design, a prototype will be built in order to practically demonstrate the feasibility of the proposed solution and to reveal its main practical features and limitations. A comparative study to several other similar topologies will be carried out to identify its most desirable feature. Finally, an application of the new hybrid converter will consist of a complete solar energy conversion system using a photovoltaic panel. The maximum power point tracking (MPPT) algorithm will be elaborated. The solar system together with the MPPT will first be modeled, then simulated and practically implemented and tested.

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“…Dc-dc converters are used in a large variety of applications: unidirectional and bidirectional chargers in automotive, renewable energies in photovoltaic cells for example, dc grids, cellphones, computers, laptops and so forth. These power circuits should be able to step-up [1][2][3][4][5][6][7][8][9], step-down [10][11][12][13] or step-up/step-down [14][15][16][17][18][19][20][21] the voltage from the input. The polarity of the output voltage can be the same [1][2][3][4][6][7][8] or reverse [5,[22][23][24][25][26][27][28][29] compared to that of the input voltage.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, depending on the application requirements, considering the few parameters mentioned before, different types of converters exist on the market. Because this paper introduces a newĆuk topology, different types of both step-down/step-up converters have been analyzed [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32]. If isolation is not necessary, the classical Buck-Boost converter [30] can be used.…”

Section: Introductionmentioning

confidence: 99%

A New Hybrid Ćuk DC-DC Converter with Coupled Inductors

2020

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This paper proposes a new hybrid Ćuk-type converter employing two inductors built on the same core which can be successfully used in applications requiring an output voltage considering higher than the input one. With few components added, in the proposed converter the static conversion ratio can be easily extended becoming wider compared to the classical Ćuk topology. At the same duty cycle range the output voltage is higher than in the classical Ćuk converter. The output voltage remains with negative polarity and with a reduced ripple. An advantage of the new converter is given by its two degrees of freedom. A DC and AC analysis is carried out, device stresses are evaluated and a comparative analysis of the proposed hybrid Ćuk topology to other indirect converters has also been performed. All the equations necessary for designing the converter are provided. The simulations performed together with the practical experiments carried out, all results confirm that the theoretical considerations are correct and validate the features that the proposed converter can provide a higher static conversion ratio without operating at high duty cycles.

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Multiple-Input Soft-Switching Step-up/down Converter for Renewable Energy Systems

Cited by 4 publications

References 11 publications

Design and Analysis of a Step-Up Multi-Port Converter Applicable for Energy Conversion in Photovoltaic Battery Systems

Design and Analysis of a Step-Up Multi-Port Converter Applicable for Energy Conversion in Photovoltaic Battery Systems

A New SEPIC-Based DC-DC Converter with Coupled Inductors Suitable for High Step-Up Applications

A New Hybrid Ćuk DC-DC Converter with Coupled Inductors

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