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Structural Model of Power Grid Stabilization in the Green Hydrogen Supply Chain System—Conceptual Assumptions

Institute of Management, University of Szczecin, 71-004 Szczecin, Poland
Author to whom correspondence should be addressed.
Energies 2022, 15(2), 664;
Submission received: 22 November 2021 / Revised: 16 December 2021 / Accepted: 29 December 2021 / Published: 17 January 2022
(This article belongs to the Special Issue Financial Development and Energy Consumption Nexus)


The paper presents the conceptual assumptions of research concerning the design of a theoretical multi-criteria model of a system architecture to stabilize the operation of power distribution networks based on a hydrogen energy buffer, taking into account the utility application of hydrogen. The basis of the research process was a systematic literature review using the technique of in-depth analysis of full-text articles and expert consultations. The structural model concept was described in two dimensions in which the identified variables were embedded. The first dimension includes the supply chain phases: procurement and production with warehousing and distribution. The second dimension takes into account a comprehensive and interdisciplinary approach and includes the following factors: technical, economic–logistical, locational, and formal–legal.

1. Introduction

Nowadays, more and more policymakers across the world pay attention to green energy, decarbonization, and applying zero or low-emission solutions in their economies, mainly due to customer pressure [1,2]. With the development of renewable energy sources (RES), the problem of seasonality in energy supply from these sources has arisen. Seasonality concerns both daily and weekly schedules or the system of seasons. One of the concepts for solving this problem is storing electric energy in hydrogen (building a hydrogen buffer). The task of the hydrogen buffer is to stabilize the operation of electric power networks through the conversion of excess electrical energy to so-called “green” hydrogen (electrolyzer), hydrogen storage (warehouse), and conversion of hydrogen to electricity—fuel cell (production and storage phase). The energy stored in hydrogen will serve to meet future demand in situations of periodic shortage. Moreover, hydrogen fuel (distribution phase) can also be used for utility purposes through distribution system operators (e.g., refueling of the vehicle fleet). A by-product of the electrolysis process is oxygen, which may in the future constitute a source of income for the distribution system operators (additional economic benefits).
System stabilization is understood in this context as the balancing of electricity supply and demand, taking into account the resulting transmission losses [3,4,5]. The development of a system solution that stabilizes the operation of power distribution grids will enable effective electricity management by increasing network flexibility in terms of possibilities for connecting new producers of energy from renewable sources (RES), increasing network security and reliability, as well as improving the quality parameters of supplied electricity [6,7].
In the literature on the subject, there is a paucity of studies integrating the research area of hydrogen supply chains with the functioning of power grids. Thus, the aim of the conducted research is to develop conceptual assumptions for the designed theoretical, multi-criteria architecture model of a system stabilizing the operation of power distribution networks on the basis of a hydrogen energy buffer while taking into account the utility application of hydrogen. The conceptual assumptions for the development of the model include the definition of the main layout of the system architecture and the identification of the variables that make up its structure (structural model). The model should include four utility functions [8]:
  • conversion of electricity to hydrogen,
  • fuel cells that convert hydrogen into electricity,
  • hydrogen storage,
  • utility application of hydrogen.
The functions of conversion of electricity to hydrogen, fuel cells that convert hydrogen into electricity, and hydrogen storage enable the stabilization of energy networks through electrolysis. The function of utility application of hydrogen is a supplement to the energy grid stabilization system and enables the additional outlet of energy produced by RES in the form of hydrogen fuel. This gives the distributors of energy networks opportunities to generate additional income.
The article is divided into three parts. The first part presents the purpose and explains the adopted research procedure. The second part presents the results of the conducted literature research showing the current state of knowledge in the development of hydrogen supply chains along with the identified factors of stabilization of energy networks (technical, economic–logistic, localization, and formal–legal). The third part of the article is devoted to the conceptualization of variables in the structural model of the system stabilizing the operation of electric power distribution networks based on a hydrogen energy buffer.

2. Materials and Methods

The basis of the research process was a systematic literature review (SLR). In the process of systematic literature review, the technique of in-depth analysis of the full contents of the articles was used. The primary source of data was the Web of Science (WoS) database. The time scope of the analysis covered the period of January–March 2021.
The aim of the SLR was to identify, integrate, and evaluate the state of research in hydrogen supply chain design based on clearly defined criteria. The SLR allowed for the initial identification of variables and then their verification and selection, which enabled the development of a structural model concept. According to the research methodology [9], the literature review included three steps:
  • The identification, classification, and preliminary content analysis included 311 articles selected from the Web of Science (WoS) database according to conceptual categories related to the research objective (keywords): hydrogen, supply chain, storage, renewable sources, model, location, power grid, electrolysis.
  • The selection of key research material included the selection of 42 articles in the areas of hydrogen production and storage from RES by means of electrolysis, fuel cell application, utility application of hydrogen in transportation, and modeling of hydrogen supply chains.
  • An in-depth content analysis of the selected 42 articles was aimed at:
    • the identification of technical, economic-logistic, location and formal-legal factors for the purpose of building a structural model,
    • the identification of research methods used in the modeling of processes of hydrogen supply, production, storage, and distribution from RES.
    The first stage of the SLR began with the formulation of the main and additional research questions. The following main research question was posed:
    • What do we know about the potential for stabilizing power networks based on renewable energy sources by using hydrogen technologies?
    In order to minimize errors associated with the omission of articles important to the purpose of the study, additional research questions were set:
    • What do we know about renewable energy systems using green hydrogen for energy storage?
    • What do we know about the methods and models used to stabilize power grids based on hydrogen storage systems?
    • How do hydrogen supply chains that include a storage cell work?
    • What factors are considered when identifying hydrogen storage sites?
    The formulated research questions were then used to determine the following keywords used to search the WoS database: hydrogen, supply chain, storage, renewable sources, model, location, power grid, and electrolysis. The determined phrases were cross-used in a four-step search. As a result of the search, 311 literature items were identified. Among the preselected 311 sources, there were:
    • 197 scientific articles,
    • 1 book chapter,
    • 76 conference proceedings papers,
    • 37 review articles.
    In stage two of the SLR, 42 key literature items were selected from a preselected group of 311 articles. The selection of key literature items was based on the analysis of the full texts of the 311 articles. Forty-two items were selected for the second stage of the systematic literature review, including:
    • 31 scientific articles,
    • 2 conference proceedings papers,
    • 9 review articles.
The aim of the in-depth review of 42 items of literature was to identify categories of factors for the structural model in the supply chain phase’s system. Thus, the review was directed to identify in the analyzed texts the following variables (factors) relevant to the design and operation of the hydrogen supply chains: technical, economic–logistical, locational, and formal-legal.
To validate the achieved research results in the form of a structural model concept, expert consultations were carried out with representatives of enterprises and scientists representing technical and economic sciences. The consultations allowed for the verification of the factors influencing the stabilization of power networks with the use of the hydrogen buffer obtained in the systematic literature review. Moreover, the strength of the correlation between the various factors was indicated.
A simplified diagram of the conducted research process is presented in Figure 1.
The choice of the adopted research concept results from the possibility of its application in both technical and social sciences. It also allows for the multi-layered verification of the obtained results. Taking into account the above, the knowledge obtained from the SLR, supplemented with consultations with scientists representing mainly technical sciences (electrical engineering, power engineering, automation, chemical engineering), and verified with representatives of business practices (perspective of the distribution system operator) enabled the development of the concept of a multi-criteria theoretical model of architecture stabilizing the operation of power distribution networks based on a hydrogen energy buffer, while taking into account the utility application of hydrogen (structural model).

3. Results

3.1. Theoretical Background

The first in-depth studies on hydrogen supply chains (mainly from the 2008 to 2012 period) focused primarily on the possible evolution of the hydrogen market, strongly linked to transport. Three main components were distinguished in the hydrogen supply chain structure: hydrogen production subsystem, hydrogen storage subsystem, hydrogen transportation subsystem, and hydrogen refueling station subsystem [10]. In this view, hydrogen supply chain (HSC) research has focused on hydrogen production and storage infrastructure and hydrogen transportation means and processes [11].
These studies did not consider the feedstock phase, which is nowadays recognized as an important component of the HSC. In the first HSC structures, which included the feedstock, four nodes were pointed to [12]: raw material suppliers (local or international), production plants, storage points, and fuel stations. These nodes can be connected by different modes of transport. The supplier sends the raw material to the production plant. At the plant, the raw material is transformed into the final product (liquid or gaseous hydrogen), which is then transported to storage points or directly to refueling stations. From the warehouse, in response to demand, the product is sent to the refueling station. It is also possible to transport the product between storage points. In this approach, however, the specific independence of the individual phases identified in the structure of the hydrogen supply chains is still apparent.
Recent studies present a change in the approach. Hydrogen production through electrolysis is increasingly being considered as an optimal solution. In addition to a more precise determination of the operating costs of the HSC, due to technological progress, a change in the role attributed to hydrogen is particularly highlighted. Hydrogen is treated as an energy carrier and a means of stabilizing the operation of power grids, as well as a raw material for use in various industrial sectors [13]. Since hydrogen technologies are still at a very early stage of development, research has largely focused on strategic HSC planning and the deployment of hydrogen infrastructure. In this context, the importance of the HSC feedstock phase is increasingly pointed out in hydrogen supply chains. It is emphasized [13] that the HSC starts in the feedstock phase and ends with the sale of hydrogen at refueling stations. At the same time, in-depth research on each phase of the HSC is intensively developed due to the existence of many options for their operations. For example, water (with electricity), biomass, and coal can be used as raw material for the production process—electrolysis, biomass gasification, (BG) and coal gasification (CG) processes, respectively [13].
In the feedstock phase, hydrogen as an energy carrier can be produced from different raw materials. Natural gas, coal, biomass, and water (along with electricity from the local power network) are the feedstocks considered in most studies. At the same time, renewable energy sources (RES), including biomass, solar, and wind energy [14] have been increasingly studied in recent years in the context of climate and energy policy challenges related to decarbonization. Nuclear sources are also being considered to achieve mass production of low carbon hydrogen [15].
However, the RES structure is often overlooked in research and excluded from the HSC design model. The cost of purchasing raw materials is included as part of the unit cost of production. On the other hand, the structure, origin (or availability), storage, and transportation of raw materials have been greatly simplified or even completely ignored. At the same time, it is pointed out [13] that, in fact, the initial availability of raw materials plays an important function in the HSC due to the hydrogen supply dependence on regionally unique resource characteristics. The structure of RES sources is also crucial. Studies [16], including RES from solar sources, indicate that the art of sustainable operations of grid-integrated wind turbines is rooted in the predesign stage, where adequate reliability studies are required to determine the appropriate location for minimizing transmission losses. At the same time, the necessary integration of solar systems into power grids is associated with technical challenges at the transmission and distribution stages. Few studies also emphasize the importance of the availability of water as the main raw material in the electrolysis process and oxygen, which is the key raw material in coal or biomass gasification [9,10,17,18].
In the HSC production phase, steam methane reforming (SMR), biomass and coal gasification (BG and CG, respectively) and electrolysis are the three main production technologies analyzed in the studies [19,20]. It is indicated that currently most of the hydrogen is produced by SMR, which is currently considered the cheapest production method [21]. Nevertheless, significant advantages of electrolysis are indicated in the future. Although the processes are more expensive in this technology, it allows a wider use of hydrogen with a low carbon footprint in the energy system [22,23,24].
The hydrogen storage phase is considered as a way to cope with production plant outages and demand fluctuations. In addition, as more and more electricity from RES is being introduced into the energy mix, the use of hydrogen storage as an approach to energy storage and a solution to the power grid balancing problem has received increasing attention in recent years. However, it is pointed out that HSC models, which are based on electrolysis-generated hydrogen, require additional seasonal hydrogen storage capacity to bridge the gap between fluctuations in hydrogen generated from surplus renewable electricity and demand from refueling stations [25,26]. Currently, a number of studies are being undertaken in the area of HSC modeling, dealing strictly with the hydrogen storage phase. They are mostly focused on the technical and economic aspects of this solution.
In the transport phase, essentially two options are analyzed. Hydrogen can be transported as liquefied or compressed gas. Liquefied hydrogen can be transported in tankers by rail, road, or sea, while gaseous hydrogen can be transported by high-pressure pipelines or overland transport (in special rail cars or pipe trailers). Tank cars, pipe trailers, and pipelines are the three most commonly selected options for hydrogen transportation. The main factors influencing the choice of hydrogen transportation modes are the hydrogen demand profile (i.e., when and where the demand for hydrogen will arise and the volume of demand) and the distance from the production site to the delivery points [27].
In the distribution phase, two basic types of hydrogen refueling stations are indicated: stations where hydrogen is produced elsewhere and delivered to the station for local storage and distribution to fuel cell electric vehicles (FCEVs) and stations where hydrogen is produced and stored on-site, ready to be transferred to an on-board hydrogen storage facility [28]. Stations that rely on supply can be supplied with liquid or gaseous hydrogen using appropriate distribution techniques. For on-site stations, the most popular production technologies are on-site electrolysis and on-site SMR. On-site electrolysis using grid power is the most commonly used technology in North America, while off-station produced hydrogen supply techniques are the most popular in Europe.
Further research on the planning and operations of HSCs points to the need to fill existing gaps, in particular for in-depth studies on the feedstock phase and on storage seasonality issues. So far, the focus has been mainly on techno-economic issues, without covering in detail the social, regulatory, and policy aspects and the issue of uncertainty about the input data, such as weather conditions, energy prices, and demand that may affect the system operations. It is indicated [29] that future research directions should capture social aspects (e.g., power system security) that may cause consumer rejection of the concept and take into account context-specific conditions (e.g., availability of RES sources, weather) and the uncertainty factor to improve the decision-making process for planning HSC and hydrogen-based power systems.
Moreover, the directions of further research on HSC modeling are determined by the increase in the share of RES power in electric power networks. HSC research should therefore give more consideration to aspects of hydrogen production from RES to accelerate the transition to a low-carbon hydrogen economy. Electrolysis, on the other hand, should be considered in the context of storing surplus energy produced from RES and balancing the operation of electric power grids. The link between the energy supply chain and the hydrogen supply chain is presented in Figure 2.
The link between the development of renewable energy and the use of hydrogen to store surplus electricity is particularly important. The need to store the surplus generated power and balance the power grid is driving the faster development of electrolysis technology. In the electricity grid of the future, dominated by RES energy, hydrogen extracted and transformed by electrolysis will be suitable for a variety of applications: new fuel supply channels, international hydrogen trade, CO2 sequestration, and ancillary services for the electricity grid. More broadly, hydrogen from RES should be considered as a feedstock for some industrial applications.
It can therefore be concluded that future research directions will largely focus on the development of hydrogen fuel cells and hydrogen refueling station networks, including distribution network planning and hydrogen supply cost assessment. This requires a shift in current energy market paradigms. Currently, the price of energy, including electricity, is determined by the price of oil. In the future, assuming the pursuit of an energy mix based 100% on electricity from renewable sources, the regulatory framework will change. Questions arise as to what parameters will determine the cost of electricity and whether hydrogen produced from surplus electricity from RES will be able to influence the oil market [30].

3.2. Identification of the Model Variables

The preliminary extraction of the structural model factors was carried out based on an in-depth analysis of 42 literature items extracted from the 311 articles analyzed (SLR), as indicated in Table 1. The factors were assigned to each category and phase of the supply chain, as shown in Table 1.
The prepared list of 85 factors was subject to evaluation during brainstorming by experts. As a result of discussions and consultations with experts, key factors from the scope of research were selected by combining and eliminating some of the items. Significance from the point of view of the research goal was taken into account, while simplifying the structure. At the same time, a verification of formal and legal factors resulting from the analysis of national and EU regulations was carried out. As part of the analysis, additional factors were identified, i.e.,:
  • the complexity of the legal regime in the area of hydrogen technologies
  • public support mechanisms for H2 and RES technologies (grants, subsidies, etc.)
  • public support mechanisms for H2 technologies (grants, subsidies, etc.)
  • stability of laws
  • Spatial Development Plan for RES installations
  • Spatial Development Plan for hydrogen buffer
  • Spatial Development Plan for storage
  • permits for connection and access to the grid DSO of the electrolyzer and the fuel cell
  • permits for hydrogen production (legal recognition or restriction of hydrogen energy production)
  • environmental and safety permits
  • hydrogen storage permits
  • hydrogen transport permits (ADRs, packages, cylinders, trailers, drivers, companies)
  • permits authorizing the construction and operation of the HRS (Spatial Development Plan, safety permits, environmental permits, risks, monitoring)
  • legal status of hydrogen as a fuel
The factors identified in the analysis of literature and legal acts in the next stage of the research were verified by experts. Due to the large number of found factors, the next stages of the research were aimed at narrowing down their number to key and uncorrelated factors.

4. Discussion and Conclusions

The objective of the research is to design a theoretical multi-criteria model of a system architecture for stabilizing the operation of electric power distribution networks based on a hydrogen energy buffer, while taking into account the utility applications of hydrogen. In assumption, the model should comprise four utility functions: conversion of electric energy to hydrogen, fuel cell converting hydrogen to electric power, hydrogen storage, and utility application of hydrogen.
The concept of the structural model was described in two dimensions in which the identified variables were embedded. The first dimension includes the supply chain phases: feedstock, production with storage, and distribution. The second dimension considers a comprehensive and interdisciplinary approach and includes the following factors: technical, economic–logistic, localization, and formal-legal. While conceptualizing the variables of the structural model of the system stabilizing the operation of electric distribution networks on the basis of a hydrogen energy buffer, 49 variables were identified. Table 2 shows the assignment of variables in the matrix system of the structural model. In addition, due to the need to determine the role of the identified variables in the mechanism of stabilizing the operation of power distribution networks, they were divided into controllable, non-controllable, and disturbing variables.
Summarizing the research findings, it is concluded that there is a paucity of studies in the literature that integrate the research area of hydrogen supply chains with the functioning of electrical power grids. The present research aspires to fill the research and cognitive gap in this area. This is because SLR research in the content analysis of scientific articles has shown that research on modeling hydrogen supply chains is still in its early development stage. The existing literature is dominated by:
  • fragmentary studies in the technical sciences that focus on selected aspects of hydrogen production, storage, or distribution,
  • optimization models based on selected methods of operational research applied in technical sciences.
In particular, SLR has shown that there is a lack of comprehensive research and research methods covering diverse aspects of hydrogen supply chain design and modeling in the context of stabilizing the operation of electric power distribution grids based on a hydrogen energy buffer. In addition, there is a lack of comprehensive and consistent legal regulations conditioning the development of hydrogen supply chains.
The developed conceptual framework for the structural model includes the conceptualization of 49 variables assigned to a two-dimensional system architecture covering the three phases of the hydrogen supply chain (feedstock, production with storage, and distribution) in four groups of factors (technical, economic–logistical, locational, and formal–legal factors) taking into account the four hydrogen utilities (conversion of electricity to hydrogen, fuel cells converting hydrogen to electricity, hydrogen storage, and hydrogen utility application). The model is related directly to the so-called green hydrogen generated from electricity produced from renewable energy. It takes on particular importance because it may help to limit the use of fossil fuels and apply zero or low-emission solutions, which are the key policy actions in the field of sustainable development of the energy sector and economy. Much effort is made towards the process of energy transformation and decarbonization as well as increasing the share of renewable energy sources (RES) in the supply of primary energy.
The presented model describes a new research area that integrates theoretical achievements in the field of hydrogen supply chains as well as the operation and development of power grids. The indicated common area is also of great application importance. However, in the presented studies the conceptual model identifies the main variables at the overall level of the hydrogen supply chain. Although it allows managers to see the entire spectrum of variables in the hydrogen supply chain, some limitations in its use by managers have been observed.
In the next stage of the work, it is necessary to continue research on the operationalization of variables and the determination of their relationships and interaction. This will ultimately contribute to the development of a systemic solution that will stabilize the operation of the electric power distribution networks and will enable effective electrical energy management, increasing network flexibility with regard to the possibilities of connecting new producers of energy from renewable sources (RES), raising network security and reliability, and improving the quality parameters of the supplied electrical energy.

Author Contributions

Conceptualization, M.F., M.M., M.R., A.R. and E.S.; methodology, M.F., M.M., A.R. and E.S.; software, M.R., A.R. and E.S.; validation, M.F., M.M., M.R., A.R. and E.S.; formal analysis, M.F., M.M., M.R., A.R. and E.S.; investigation, M.F., M.M. and A.R.; resources and data curation, M.F., M.M., M.R., A.R. and E.S.; writing-original draft preparation, M.F., M.M., M.R. and A.R.; writing-review and editing, M.F., M.M., M.R., A.R. and E.S.; visualization, M.R., A.R. and E.S.; supervision, M.F., M.M., M.R., A.R. and E.S.; project administration, M.F., M.M., M.R., A.R. and E.S. All authors have read and agreed to the published version of the manuscript.


This research was partially funded by the National Center for Research and Development (Poland) in the framework of the H2eBuffer project. Grant Nr POIR.04.01.04-00-0040/20 (2021–2023).

Institutional Review Board Statement

Not applicable.

Informed Consent Statement

Not applicable.

Data Availability Statement

Not applicable.


This research was supported by the University of Szczecin, Institute of Management, Cukrowa Street 8, 71-004 Szczecin, Poland.

Conflicts of Interest

The authors declare no conflict of interest.


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Figure 1. Scheme of the research process.
Figure 1. Scheme of the research process.
Energies 15 00664 g001
Figure 2. Energy supply chain with hydrogen supply chain. Source: own elaboration.
Figure 2. Energy supply chain with hydrogen supply chain. Source: own elaboration.
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Table 1. Structural model factors derived from the conducted literature review.
Table 1. Structural model factors derived from the conducted literature review.
Supply Chain PhaseGroup of FactorsFactorsAuthors
feedstockeconomic and logistical
  • fixed costs: investment (capital) costs
  • operating costs: costs of purchasing energy from RES (different for various RES)
  • operating costs: costs of water purchases
  • operating costs: other delivery costs
  • operating costs: e.g., transmission costs
  • energy network efficiency indicators
  • inflation
  • interest rates
  • daily production volume (main power station/source)
  • type/percentage share of RES sources (solar, wind, etc.)
formal and legal
  • safety (risk)
  • access to water (distance matrix)
  • exclusion factors (land class, Natura 2000, human settlement, etc.)
  • RES sources
  • land development: access to utilities
productioneconomic and logistical
  • infrastructure fixed costs: purchase cost of electrolyzer, fuel cell, storage, compressor, connection infrastructure
  • other fixed costs: cost of purchasing land
  • fixed costs: administrative costs
  • operating costs: maintenance costs
  • operating costs: cost of purchasing water
  • operating costs: opportunity costs (lost sales, unused RES energy)
  • operating costs: costs of not meeting RES targets (share of gross energy)—penalties for conventional alternatives
  • operating costs: costs of compensation for network exclusions
  • operating costs: costs of producing the hydrogen
  • energy network efficiency indicators
  • operating costs: costs of producing electricity
  • operating costs: EUA (cost of CO2 emission allowances)
  • H2 production power of the system (maximum value) determined by the PEM electrolyzer
  • amount of (daily) H2 production (real value) determined by the PEM electrolyzer
  • amount of (daily) energy production—output/power of the fuel cell
  • electricity generation efficiency = fuel cell efficiency
  • electrolyzer—service availability time
  • the cell—service availability time
  • energy conversion time to H2
  • conversion time of H2 to energy
  • risk of hazard
  • water consumption
  • energy efficiency of hydrogen production
  • energy efficiency of hydrogen compression
  • H2 consumption by the cell
  • quality of energy produced by the fuel cell
formal and legal
  • social acceptance
  • safety (risk)
  • Spatial Development Plan/land development conditions
  • risk of penalties for fossil fuels
  • distance of the buffer to the transport network (due to e.g., class of road)
  • availability of land
  • relief
storageeconomic and logistical
  • fixed costs: investment costs (fixed costs: warehouse+ compressor)
  • operating costs: energy storage costs
  • operating costs: maintenance costs
  • energy network efficiency indicators
  • storage size/capacity
  • storage throughput
  • hydrogen density
  • hydrogen pressure
  • storage life (cycles)
  • risk of hazard
formal and legal
  • safety (risk)
distributioneconomic and logistical
  • selling price of fuel cell energy (cost of producing energy for own purposes)
  • selling price of H2 (production cost of H2 for own use)
  • inflation
  • operating (station-keeping) cost
  • the cost of transporting H2 to the station
  • investment (capital) costs: installation costs
  • investment (capital) costs: costs of purchasing cars for H2
  • investment costs (capital costs): costs of purchasing a fleet of tankers
  • the transport of hydrogen from storage to the fueling stations
  • average daily demand for electricity on the grid
  • interest rates
  • volume of H2 delivered after compression
  • distribution network performance indicators
  • average daily hydrogen consumption
  • station-charging time (distribution depot)
  • H2 refueling time of cars and tankers
  • the time for loading and unloading H2 onto the means of transport
  • number of H2 tankers (H2 carriage)
  • number of cars on H2 (fleet, capacity)
  • number of refueling stations
  • number of station positions
  • risk of hazard
  • station size (in terms of demand and availability)
formal and legal
  • safety (risk)
  • distance of the charging station from the warehouse
  • travel time to station
Source: own elaboration.
Table 2. Conceptualization of variables in the structural model of the system stabilizing the operation of electric power distribution networks on the basis of a hydrogen energy buffer.
Table 2. Conceptualization of variables in the structural model of the system stabilizing the operation of electric power distribution networks on the basis of a hydrogen energy buffer.
Supply Chain PhaseFactor GroupFactorUnitType
feedstocktechnicalinstalled capacity of RESMWnon-controllable
structure of RES power%non-controllable
losses of RES power in 15 kV lineskWdisturbing
transmission capacity of 110 kV linesMVAcontrollable
transformer capacity in Main Power StationkWAcontrollable
economic-logisticalvolume of RES-generated electrical energyMWhnon-controllable
volume of water deliveredl/kgnon-controllable
economic mechanisms of public supportEURnon-controllable
costs of modernisation of 110kV lines and transformersEURcontrollable
volume of electricity released from MV grid to HV gridMWhdisturbing
energy purchase costs to cover the balance differenceEURnon-controllable
formal and legalcomplexity of the legal systemLikert scalenon-controllable
stability of laws and regulationsLikert scalenon-controllable
non-economic public support mechanismsLikert scalenon-controllable
permits and administrative decisions<0;1>non-controllable
locationalavailability of land<0;1>non-controllable
proximity to restrictive areas<0;1>non-controllable
attractiveness of location for RES developmentLikert scalenon-controllable
production and storagetechnicalPEM electrolyzer powerkWcontrollable
electrolyzer efficiencykWh/kgnon-controllable
fuel cell powerkWcontrollable
fuel cell efficiencykWh/kgnon-controllable
hydrogen storage capacitykgcontrollable
hydrogen storage throughputkg/hcontrollable
hydrogen storage lifenumber of cyclesnon-controllable
ekonomic-logisticaleconomic mechanisms of public support (white certificates)% of capital expendituresnon-controllable
capital expenditures on production infrastructureEURnon-controllable
operating costs of the production phaseEUR/yearnon-controllable
demand of Main Power Station for electricity from the fuel cellMWhnon-controllable
formal and legalcomplexity of the legal systemLikert scalenon-controllable
stability of laws and regulationsLikert scalenon-controllable
non-economic public support mechanismsLikert scalenon-controllable
permits and administrative decisions<0;1>non-controllable
locationalacceptance of local community<0;1>disturbing
distance of buffer from transport networkkmnon-controllable
distributiontechnicaldistribution capacitykg/hcontrollable
distribution facility lifetime<0;1> lub %disturbing
economic–logisticaleconomic mechanisms of public support (subsidies and tax relief)EURnon-controllable
capital expenditures on distribution infrastructureEURnon-controllable
operating costs of the distribution phaseEUR/yearnon-controllable
revenues from the sale of oxygenEUR/yearnon-controllable
demand for hydrogen fuelkg/24 hnon-controllable
formal and legalcomplexity of the legal systemLikert scalenon-controllable
stability of laws and regulationsLikert scalenon-controllable
non-economic public support mechanismsLikert scalenon-controllable
permits and administrative decisions<0;1>non-controllable
locationaldistance of the distribution facility from the backup storagekmnon-controllable
travel time of users to the distribution facilityhnon-controllable
Source: own elaboration.
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Frankowska, M.; Mańkowska, M.; Rabe, M.; Rzeczycki, A.; Szaruga, E. Structural Model of Power Grid Stabilization in the Green Hydrogen Supply Chain System—Conceptual Assumptions. Energies 2022, 15, 664.

AMA Style

Frankowska M, Mańkowska M, Rabe M, Rzeczycki A, Szaruga E. Structural Model of Power Grid Stabilization in the Green Hydrogen Supply Chain System—Conceptual Assumptions. Energies. 2022; 15(2):664.

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Frankowska, Marzena, Marta Mańkowska, Marcin Rabe, Andrzej Rzeczycki, and Elżbieta Szaruga. 2022. "Structural Model of Power Grid Stabilization in the Green Hydrogen Supply Chain System—Conceptual Assumptions" Energies 15, no. 2: 664.

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