A Study for a Hybrid Wind-Solar-Battery System for Hydrogen Production in an Islanded MVDC Network

Lin, Yunfeng; Fu, Lijun

doi:10.1109/access.2022.3193683

Cited by 18 publications

(11 citation statements)

References 28 publications

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“…This paper just considers electrolyzers connected to DC grids and other possible applications are neglected. This way, depending mainly on the rated power, electrolyzers can be connected to medium voltage DC systems (MVDC) [14], [15] or high voltage DC systems (HVDC) [16]. HVDC systems are a mature technology that has a place in today's power system, due to technical and economical superiority for certain applications, such as bulk transmission systems over long distances, undersea connections and integration of large-scale remote RES [17].…”

Section: Protection Of Mvdc Gridsmentioning

confidence: 99%

Protection of MVDC grids for the production of green hydrogen

Larruskain¹,

Eguia²,

Iturregi³

et al. 2024

RE&PQJ

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Green hydrogen production from renewable energy sources has a big potential to reduce energy dependence on fossil fuel, contributing to the global goal set by the international community of net zero emissions by 2050. Electrolyzers are connected to grid with power stages that can be designed as active devices with high control capability and a remarkably fast operation. Nevertheless, in the present, they must overcome some challenges in order to ensure a reliable operation. This paper addresses the concept of protection of DC grids with electrolyzers fed from renewable energy sources. The topologies of the grid are discussed as well as protection features and fault clearing strategies. A new dynamic model for multi megawatt PEM electrolyzer is introduced. Finally, a case study with a PEM electrolyzer in a MVDC system is included.

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Section: Protection Of Mvdc Gridsmentioning

confidence: 99%

Protection of MVDC grids for the production of green hydrogen

Larruskain¹,

Eguia²,

Iturregi³

et al. 2024

RE&PQJ

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“…Several papers have been published in the last three years. The integration of wind, photovoltaic and batteries in an islanded MVDC Network has been presented in [2].…”

Section: Introductionmentioning

confidence: 99%

Continuous Time Simulation and System Level Control Model of a Modern MVDC Distribution Grid including SST and MMC Based AFE

Siemaszko,

Carpita

2024

Preprint

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The medium-voltage DC (MVDC) technology has gained increasing interests in recent years. Power electronics devices dominate those grids. Accurate simulation of such a grid, with detailed models of switching semiconductors, can quickly became very time-consuming, according to the number of connected devices to be simulated. A simulation approach based on interactions on a continuous time model can be very interesting, especially for developing a system level control model of such a modern MVDC distribution grid. Aim of this paper is to present all the steps required for obtaining a continuous time modelling of a +/- 10 kV MVDC grid case study, including Solid State Transformer (SST) and Modular Multilevel Converter (MMC) based Active Front End (AFE). Additional aim of this paper is to supply an educational content about the use of the continuous time simulation approach, thanks to a detailed description of the various devices modelled into the presented MVDC grid. The results of a certain number of simulation scenarios are eventually presented.

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“…However, the existing literature usually ignores this issue to simplify the model [7], or just advocates for PEM technology by highlighting the limits of alkaline technology without a specific techno-economic analysis [10], leading to misestimation of the actual benefits brought by alkaline electrolysis [11]. The authors in [12] adopt the engineering model of an alkaline electrolyzer in a green hydrogen production system without any constraints for the uncertain input power. Few authors explicitly model the impacts of fluctuating power supply.…”

Section: Introductionmentioning

confidence: 99%

Techno-Economic Analysis of Grid-Connected Hydrogen Production via Water Electrolysis

Zhu,

Mae,

Matsuhashi

2024

Energies

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As the global energy landscape transitions towards a more sustainable future, hydrogen has emerged as a promising energy carrier due to its potential to decarbonize various sectors. However, the economic competitiveness of hydrogen production by water electrolysis strongly depends on renewable energy source (RES) availability. Thus, it is necessary to overcome the challenges related to the intermittent nature of RESs. This paper presents a comprehensive techno-economic analysis of complementing green hydrogen production with grid electricity. An evaluation model for the levelized cost of hydrogen (LCOH) is proposed, considering both CO2 emissions and the influence of RES fluctuations on electrolyzers. A minimum load restriction is required to avoid crossover gas. Moreover, a new operation strategy is developed for hydrogen production plants to determine optimal bidding in the grid electricity market to minimize the LCOH. We evaluate the feasibility of the proposed approach with a case study based on data from the Kyushu area in Japan. The results show that the proposed method can reduce the LCOH by 11% to 33%, and increase hydrogen productivity by 86% to 140%, without significantly increasing CO2 emission levels.

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A Study for a Hybrid Wind-Solar-Battery System for Hydrogen Production in an Islanded MVDC Network

Cited by 18 publications

References 28 publications

Protection of MVDC grids for the production of green hydrogen

Protection of MVDC grids for the production of green hydrogen

Continuous Time Simulation and System Level Control Model of a Modern MVDC Distribution Grid including SST and MMC Based AFE

Techno-Economic Analysis of Grid-Connected Hydrogen Production via Water Electrolysis

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