Comparative analysis of thyristor-based and transistor-based rectifiers for PEM water electrolysis

Keddar, Mohamed; Zhang, Z.; Periasamy, Chendhil; Doumbia, Mamadou Lamine

doi:10.1109/irec52758.2021.9624773

Cited by 5 publications

(6 citation statements)

References 9 publications

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“…Furthernology is mature over PEM electrolyzers, the best performance can be w specific energy consumption, high hydrogen volume rate, and lifewbacks reported concern the low current density (up to 0.7 A•cm−2 yzer bulky) and set production capacity dynamic range (limiting opgenerate hydrogen). The system efficiency is assessed by considering range and the losses from power electronics (around 5%) with the use rs such as thyristors or transistors-based rectifiers [34,35].…”

Section: Strengthsmentioning

confidence: 99%

“…The main drawbacks reported concern the low current density (up to 0.7 A•cm−2 making the electrolyzer bulky) and set production capacity dynamic range (limiting operating conditions to generate hydrogen). The system efficiency is assessed by considering the stack efficiency range and the losses from power electronics (around 5%) with the use of AC-DC converters such as thyristors or transistors-based rectifiers [34,35]. trolyzers have been introduced in the 1960s to compete with alkaline electrolyzers to eliminate some of their disadvantages cited above.…”

Section: Strengthsmentioning

confidence: 99%

“…The resistance R ele,b due to bubbles in the electrolyte is given in Equation (34) as reported in the article [44]:…”

Section: Membranementioning

confidence: 99%

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A Comprehensive Survey of Alkaline Electrolyzer Modeling: Electrical Domain and Specific Electrolyte Conductivity

et al. 2022

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Alkaline electrolyzers are the most widespread technology due to their maturity, low cost, and large capacity in generating hydrogen. However, compared to proton exchange membrane (PEM) electrolyzers, they request the use of potassium hydroxide (KOH) or sodium hydroxide (NaOH) since the electrolyte relies on a liquid solution. For this reason, the performances of alkaline electrolyzers are governed by the electrolyte concentration and operating temperature. Due to the growing development of the water electrolysis process based on alkaline electrolyzers to generate green hydrogen from renewable energy sources, the main purpose of this paper is to carry out a comprehensive survey on alkaline electrolyzers, and more specifically about their electrical domain and specific electrolytic conductivity. Besides, this survey will allow emphasizing the remaining key issues from the modeling point of view.

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Section: Strengthsmentioning

confidence: 99%

Section: Strengthsmentioning

confidence: 99%

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A Comprehensive Survey of Alkaline Electrolyzer Modeling: Electrical Domain and Specific Electrolyte Conductivity

et al. 2022

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“…As MW-scale electrolyzers become commercially available, new research on electrolyzer energy management, including the power electronics influence on stack energy consumption and cell degradation have become relevant. As an example, recent literature has explored the use of transistor-based converters for reducing the DC-ripple and total harmonic distortion (THD) while improving the power factor [5]. However, most of these publications have been devoted to alkaline water electrolyzers due to the technology maturity of this type of electrolyzer [4].…”

Section: Introductionmentioning

confidence: 99%

“…Chen et al [9] compared the AC power quality at the beginning of the electrolyzer's lifetime with the end-of-life performance of various rectifier topologies. Keddar et al [5] demonstrated the advantages of a three-phase interleaved buck converter (3PIBR) in AC power quality over a 6-pulse thyristor and validated their numerical model using data from a 20 MW PEM electrolysis plant. On the DC side, the produced voltage and current generally contain a ripple in the form of alternating components due to the nature of rectifiers.…”

Section: Introductionmentioning

confidence: 99%

Electrolyzer Degradation-Power Electronics One -Way Interaction Model

Mohamed¹,

Keddar²,

Conceicao³

et al. 2022

Preprint

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The water electrolysis process requires a high DC current supply that can sustain the desired hydrogen production rate over a large period of operation at a competitive cost. During the conversion of electricity from AC to DC, power quality may be affected because of the non-linear effect caused by the power electronics. Most of the recent research has focused on exploring different rectifier topologies. None of them have investigated the influence of cell stack degradation on the performance of power electronics. In this work, we built a one-way interaction model to predict the influence of electrolyzer degradation on power electronics output over multiscale operational time (from milliseconds to years) for proton exchange membrane electrolyzer (PEM). In this model, we assume a constant degradation rate on the electrolyzer that results in a linear increase of internal resistance over time. Counterintuitively, rather than the power quality decreasing, results show that the power quality increased with the electrolyzer degradation for both the AC (power factor and THD) and DC side (ripple) for the 6-pulse thyristor. Furthermore, the influence of three variables (degradation rate, load current, and topology) on AC (power factor and THD) and DC (ripple factor) side power output were investigated. Finally, results were partially validated with experimental data from a 20 MW scale PEM electrolyzer.

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Electrolyzer Degradation influence on power electronics performance for 6-pulse thyristor rectifier in a large-scale water electrolyzer

Keddar¹,

Conceicao

Doumbia³

et al. 2022

2022 13th International Renewable Energy Congress (IREC)

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Comparative analysis of thyristor-based and transistor-based rectifiers for PEM water electrolysis

Cited by 5 publications

References 9 publications

A Comprehensive Survey of Alkaline Electrolyzer Modeling: Electrical Domain and Specific Electrolyte Conductivity

A Comprehensive Survey of Alkaline Electrolyzer Modeling: Electrical Domain and Specific Electrolyte Conductivity

Electrolyzer Degradation-Power Electronics One -Way Interaction Model

Electrolyzer Degradation influence on power electronics performance for 6-pulse thyristor rectifier in a large-scale water electrolyzer

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