Implementation of an electrolysis system with DC/DC synchronous buck converter

Şahin, Mustafa Ergin; Okumuş, Halil İbrahim; Aydemir, M. Timur

doi:10.1016/j.ijhydene.2014.02.084

Cited by 47 publications

(15 citation statements)

References 10 publications

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“…The electrolysis of the water needs approximately 2 V DC voltage for hydrogen production [9]. However, the photovoltaic systems are designed for high voltages for common bus voltages 12 V or 24 V for battery charge especially [10]. Therefore, it is necessary to use a DC-DC buck converter to decrease the voltage and increase the current to desired values.…”

Section: Introductionmentioning

confidence: 99%

An Efficient Solar-Hydrogen DC-DC Buck Converter System with Sliding Mode Control

Şahin¹

2019

El-Cezeri Fen Ve Mühendislik Dergisi

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This paper focuses on two different scenarios to benefit from solar energy more efficiently. One of them is photovoltaic houses and storing their energy as hydrogen, the other one is photovoltaic cars and storing their energy as hydrogen. The common point in these two photovoltaic sourced scenarios is convert and storage of the hydrogen energy more efficiently. The direct current (DC) photovoltaic energy is converted to the desired voltage level using the DC-DC buck converter for generating hydrogen with electrolysis process. The electrolysis load for hydrogen production needs low voltage and high currents especially. To supply these conditions the converter must be designed and controlled sensitively. For this aim, the sliding mode controller is proposed as a solution in this study. This controller is used the inductance current in the inner loop and supply a strong control for the converter under normal and abnormal conditions. The photovoltaic powered DC-DC buck converter for electrolysis load was simulated in MATLAB/ Simulink software more detailed using the sliding mode controller.

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Section: Introductionmentioning

confidence: 99%

An Efficient Solar-Hydrogen DC-DC Buck Converter System with Sliding Mode Control

Şahin¹

2019

El-Cezeri Fen Ve Mühendislik Dergisi

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“…In the literature, different models of PEMEL have been developed. In [14,15,16,18,19,20,32,38,39], the electrolyzer can be modeled as a simple resistor; whereas in [40,41,42,43], it is modeled by an equivalent circuit composed of a resistance series connected to a voltage generator representing the reversible voltage. In the major part of these papers and articles, too few information is provided regarding the determination of the parameters of the model.…”

Section: Pem Electrolyzer Modelingmentioning

confidence: 99%

“…Recently, several DC-DC converter topologies have been proposed for PEMEL applications and recent research works have been reported in the literature regarding the analysis of their advantages and drawbacks [18,19,20,21,22,23,24,25,26,27,28,29]. In these applications, DC-DC converters must respond to several challenging issues other than output current ripples, especially in terms of voltage ratio, cost, energy efficiency and reliability in case of power switch failures.…”

Section: Introductionmentioning

confidence: 99%

Proton exchange membrane water electrolysis: Modeling for hydrogen flow rate control

Maamouri

Guilbert

Zasadzinski

et al. 2021

International Journal of Hydrogen Energy

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Nowadays, the proton exchange membrane electrolyzer (PEMEL) is a promising and attractive technology when coupling with renewable energy sources (RES). Indeed, PEMEL can respond quickly to the dynamic operations of RES. Given that PEMEL must be supplied with a low DC voltage, DC-DC converters are mandatory. In this work, a stacked interleaved buck DC-DC converter is used. In this paper, the tuning of proportional, integral and derivative (PID) controllers, which are often used to enhance electrolyzer performances (efficient and reliable operation), is based on the dynamic behavior of the PEMEL. Before designing the PID controller, a model of the PEMEL is proposed based on input-output measured data, and this model is combined with the converter state-space description. Then, the obtained global model is used to tune two PID controller configurations: the first one to control the current and the second one to control the voltage of the PEMEL. Experimental tests are carried out to validate the effectiveness of the designed control laws.

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“…As emphasized in previous works [21], the main drawback of current multi-source systems based on a DC configuration lies in using basic DC-DC converters (e.g., buck, boost converters) [22][23][24]. Indeed, basic DC-DC converters are set when the needed power increases or for requested higher step-down or step-up ratios.…”

Section: Presentation and Benefits Of The Three-level Interleaved Dc-mentioning

confidence: 99%

Energy Efficiency Based Control Strategy of a Three-Level Interleaved DC-DC Buck Converter Supplying a Proton Exchange Membrane Electrolyzer

et al. 2019

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To face the intensive use of natural gas and other fossil fuels to generate hydrogen, water electrolysis based on renewable energy sources (RES) seems to be a viable solution. Due to their fast response times, and high efficiency, proton exchange membrane electrolyzer (PEM EL) is the most suitable technology for long-term energy storage, combined with RES. Like fuel cells, the development of fit DC-DC converters is mandatory to interface the EL to the DC grid. Given that PEM EL operating voltages are quite low and to meet requirements in terms of output current ripples, new emerging interleaved DC-DC converter topologies seem to be the best candidates. In this work, a three-level interleaved DC-DC buck converter has been chosen to supply a PEM EL from a DC grid. Therefore, the main objective of this paper is to develop a suitable control strategy of this interleaved topology connected to a PEM EL emulator. To design the control strategy, investigations have been carried out on energy efficiency, hydrogen flow rate, and specific energy consumption. The obtained experimental results validate the performance of the converter in protecting the PEM EL during transient operations while guaranteeing correct specific energy consumption.

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Implementation of an electrolysis system with DC/DC synchronous buck converter

Cited by 47 publications

References 10 publications

An Efficient Solar-Hydrogen DC-DC Buck Converter System with Sliding Mode Control

An Efficient Solar-Hydrogen DC-DC Buck Converter System with Sliding Mode Control

Proton exchange membrane water electrolysis: Modeling for hydrogen flow rate control

Energy Efficiency Based Control Strategy of a Three-Level Interleaved DC-DC Buck Converter Supplying a Proton Exchange Membrane Electrolyzer

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