Interleaved High Step-up DC-DC Converter with Diode-Capacitor Multiplier Cell and Ripple-Free Input Current

Ebrahimi, Mostafa; Viki, Abbas Houshmand

doi:10.11591/eei.v4i4.512

Cited by 8 publications

(3 citation statements)

References 19 publications

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“…𝑑(𝑡) denotes the duty cycle of the converter switch. It can be observed that (1) and ( 2) are non-linear or time varying because of the term 𝑑(𝑡) [24]- [26]. Substituting (1) into (2) results in 2 nd order non-linear differential equation as in (3),…”

Section: Methodsmentioning

confidence: 99%

Robust sliding mode controller for buck DC converter in off-grid applications

2022

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This paper presents a robust sliding mode controller of DC-DC buck converter for renewable energy applications, such as photovoltaic systems in off-grid configurations. Photovoltaic systems in off-grid configuration are exposed to significant variations in input voltage and power loads. The proposed sliding mode controller presents a simple and efficient method of continuously updating the duty cycle of a pulse width modulation unit (PWM) of a buck converter. The PWM unit is operated at constant switching frequency of 10 kHz carrier signal and varying duty cycle. The differences in input voltage and power load are treated as two bounded uncertainties, thus eliminating the need for input voltage sensor and output current sensors leaving the system with a single sensor required to measure the converter output voltage. That is, measured output voltage is compared with the reference voltage to continuously update the average duty cycle value of PWM unit. Adjustment of PWM duty cycle is performed while maintaining the sliding condition always fulfilled. The simulation results of the proposed controller showed robustness and accuracy against power load fluctuation, changes in desired output voltage, and variations in the input supply voltage that may result from the varying level of irradiance and temperature.

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Section: Methodsmentioning

confidence: 99%

Robust sliding mode controller for buck DC converter in off-grid applications

2022

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“…Compared to a classical structure, an ISBC allows to reduce thermal constraints, input and output current ripples and so allows to achieve optimal conversion and power transfer [10]- [14]. Even without APC control, this architecture is commonly used in PV and ESS applications [15]- [17].…”

Section: A Interleaved Mode and Apc Controlmentioning

confidence: 99%

Impact on Energy Saving of Active Phase Count Control to a DC/DC Converter in a DC Micro Grid

Gaetani-Liseo¹,

Alonso²,

Séguier³

et al. 2018

2018 7th International Conference on Renewable Energy Research and Applications (ICRERA)

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This paper proposes to analyze the impact of active phase count control in DC/DC multi-phase bi-directional interleaved converter dedicated to energy storage system in low voltage DC micro grid for building integrated photovoltaic application. We focus our interest on the energy saved with an adaptive phase count control for real working conditions. To validate our approach a long term analysis was done based on a several years database of photovoltaic production and consumption power profile recorded in our laboratory building. To estimate the impact of our adaptive phase count control we built a model of converter efficiency for a large scale of operating points. Its parameters were identified through experimental measurements made on a bi-phase DC/DC bidirectional converter developed in LAAS-CNRS. Pertinence of APC control is estimated for 5 years simulation process and different load profiles. Results obtained in case of lightning network load profile, show that the energy lost without adaptive phase count control correspond to 4.22% of the energy exchange, against 3.72% with adaptive phase count control. This result correspond to a decrease of looses of 12%. In order to study the impacts on a long term analyze we choose to discuss these results regarding the energy saved with adaptive phase count control. To complete our work we propose a comparative analysis with two different load profiles with details by month and days.

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“…Step-up dc-dc converter or transformer is also available to support the SC charging. Increasing turn ratio of transformer means increasing voltage [8][9]. However, it has disadvantages of big dimension, heaviness, core losses, high cost, and tend to be non-portable [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Design of 4-stage Marx generator using gas discharge tube

et al. 2021

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In this paper, a Marx generator voltage multiplier as an impulse generator made of multi-stage resistors and capacitors to generate a high voltage is proposed. In order to generate a high voltage pulse, a number of capacitors are connected in parallel to charge up during on time and then in series to generate higher voltage during off period. In this research, a 6kV Marx generator voltage multiplier is designed using gas discharge tube (GDT) as an electronic switch to breakdown voltage. The Marx generator circuit is designed to charge the storage capacitor for high impulse voltage and current generator applications. According to IEC 61000-4-5 class 4 standards, the storage capacitor must be charged up to 4 kV. The results show that the proposed Marx generator can produce voltages up to 6.8 kV. However, the storage capacitor could be charged up to 1 kV, instead of 4 kV in the standard. That is because the output impulse voltage has narrow time period.

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Interleaved High Step-up DC-DC Converter with Diode-Capacitor Multiplier Cell and Ripple-Free Input Current

Cited by 8 publications

References 19 publications

Robust sliding mode controller for buck DC converter in off-grid applications

Robust sliding mode controller for buck DC converter in off-grid applications

Impact on Energy Saving of Active Phase Count Control to a DC/DC Converter in a DC Micro Grid

Design of 4-stage Marx generator using gas discharge tube

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