The Experts below are selected from a list of 55059 Experts worldwide ranked by ideXlab platform
Fanourios Zannikos - One of the best experts on this subject based on the ideXlab platform.
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Techno-economic analysis of an Autonomous Power system integrating hydrogen technology as energy storage medium
Renewable Energy, 2011Co-Authors: George Tzamalis, E I Zoulias, Emmanuel Stamatakis, E. Varkaraki, Evripidis Lois, Fanourios ZannikosAbstract:Two different options for the Autonomous Power supply of rural or/and remote buildings are examined in this study. The first one involves a PV – diesel based Power system, while the second one integrates RES and hydrogen technologies for the development of a self – sustained Power system. The main objective is the replacement of the diesel generator and a comparison between these two options for Autonomous Power supply. Model simulations of the two Power systems before and after the replacement, an optimization of the component sizes and a techno – economic analysis have been performed for the purpose of this study. A sensitivity analysis taking into account future cost scenarios for hydrogen technologies is also presented. The results clearly show that the Cost of Energy Produced (COE) from the PV – hydrogen technologies Power system is extremely higher than the PV – diesel Power system. However, the adopted PV – hydrogen technologies Power system reduces to zero the Green – House Gas (GHG) emissions. Moreover, the sensitivity analysis indicates that COE for the latter system can be further reduced by approximately 50% compared to its initial value. This could be achieved by reducing critical COE’s parameters, such as PEM electrolyser and fuel cell capital costs. Hence, a possible reduction on the capital costs of hydrogen energy equipment in combination with emissions reduction mentioned above could make hydrogen – based Power systems more competitive.
E I Zoulias - One of the best experts on this subject based on the ideXlab platform.
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Techno-economic analysis of an Autonomous Power system integrating hydrogen technology as energy storage medium
Renewable Energy, 2011Co-Authors: George Tzamalis, E I Zoulias, Emmanuel Stamatakis, E. Varkaraki, Evripidis Lois, Fanourios ZannikosAbstract:Two different options for the Autonomous Power supply of rural or/and remote buildings are examined in this study. The first one involves a PV – diesel based Power system, while the second one integrates RES and hydrogen technologies for the development of a self – sustained Power system. The main objective is the replacement of the diesel generator and a comparison between these two options for Autonomous Power supply. Model simulations of the two Power systems before and after the replacement, an optimization of the component sizes and a techno – economic analysis have been performed for the purpose of this study. A sensitivity analysis taking into account future cost scenarios for hydrogen technologies is also presented. The results clearly show that the Cost of Energy Produced (COE) from the PV – hydrogen technologies Power system is extremely higher than the PV – diesel Power system. However, the adopted PV – hydrogen technologies Power system reduces to zero the Green – House Gas (GHG) emissions. Moreover, the sensitivity analysis indicates that COE for the latter system can be further reduced by approximately 50% compared to its initial value. This could be achieved by reducing critical COE’s parameters, such as PEM electrolyser and fuel cell capital costs. Hence, a possible reduction on the capital costs of hydrogen energy equipment in combination with emissions reduction mentioned above could make hydrogen – based Power systems more competitive.
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Hydrogen-based Autonomous Power Systems: Techno-economic Analysis of the Integration of Hydrogen in Autonomous Power Systems
2008Co-Authors: E I Zoulias, N LymberopoulosAbstract:Introduction Autonomous Fossil Fuel and Renewable Energy (RE) Based Power Systems Integration of Hydrogen Energy Technologies in Autonomous Power Systems Review of Existing Hydrogen-based Autonomous Power Systems: Current Situation Techno-economic Analysis of Hydrogen Technologies Integration in Existing Conventional Autonomous Power Systems: Case Studies Market Potential of Hydrogen-based Autonomous Power Systems Barriers and Benefits of Hydrogen-based Autonomous Power Systems Roadmap to Commercialization of Hydrogen-based Autonomous Power Systems Conclusions
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Market Potential of Hydrogen-based Autonomous Power Systems
Hydrogen-based Autonomous Power Systems, 2008Co-Authors: E I ZouliasAbstract:The market potential for the introduction of hydrogen-based Autonomous Power systems is analysed in this chapter. It is estimated that in the world over two billion people do not have access to a reliable electricity network. Moreover in Africa, only a 10% of urban households have an electricity supply. Even in Europe around 300,000 houses, mainly located in isolated or remote areas, such as the islands and mountains, are not interconnected to the main electricity grid. These households are currently electrified through: i) fossil-fuel-based generators facing problems with onsite fuel availability, noise and emissions, ii) renewable-energy-based systems facing problems when the natural resource (sun, wind, etc.) is not available. These disadvantages can be eliminated through the introduction of hydrogen technologies as demonstrated by Agbossou et al. (2001); therefore the market potential for hydrogen technologies in Autonomous Power systems is theoretically huge.
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Techno-economic Analysis of Hydrogen Technologies Integration in Existing Conventional Autonomous Power Systems — Case Studies
Hydrogen-based Autonomous Power Systems, 1Co-Authors: E I ZouliasAbstract:The integration of hydrogen energy technologies in existing Autonomous Power systems will be studied in the context of this chapter taking into account both technical and economic aspects. The main outcome of the techno-economic analysis is to identify barriers and potential benefits for the implementation of hydrogen-based Autonomous Power systems in the short term and long term. The analysis performed in this chapter is based on real technology and market parameters acquired during the operation of these Autonomous Power systems rather than on theoretical assumptions.
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Roadmap to Commercialisation of Hydrogen-based Autonomous Power Systems
Hydrogen-based Autonomous Power Systems, 1Co-Authors: E I ZouliasAbstract:The analysis of the introduction of hydrogen energy technologies in Autonomous Power systems, which was presented in previous chapters, demonstrated that non-interconnected Power systems can be a promising market niche for hydrogen technologies in certain cases. The importance of niche applications in technological changes is stressed by Kemp et al. (1998). It should be noted that many efforts on the development of hydrogen energy roadmaps have been made worldwide, as reported by Hugh et al. (2007). The roadmap presented in this chapter is more focused as it includes a timetable for the commercialisation of hydrogen technologies only in a specific market segment.
George Tzamalis - One of the best experts on this subject based on the ideXlab platform.
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Techno-economic analysis of an Autonomous Power system integrating hydrogen technology as energy storage medium
Renewable Energy, 2011Co-Authors: George Tzamalis, E I Zoulias, Emmanuel Stamatakis, E. Varkaraki, Evripidis Lois, Fanourios ZannikosAbstract:Two different options for the Autonomous Power supply of rural or/and remote buildings are examined in this study. The first one involves a PV – diesel based Power system, while the second one integrates RES and hydrogen technologies for the development of a self – sustained Power system. The main objective is the replacement of the diesel generator and a comparison between these two options for Autonomous Power supply. Model simulations of the two Power systems before and after the replacement, an optimization of the component sizes and a techno – economic analysis have been performed for the purpose of this study. A sensitivity analysis taking into account future cost scenarios for hydrogen technologies is also presented. The results clearly show that the Cost of Energy Produced (COE) from the PV – hydrogen technologies Power system is extremely higher than the PV – diesel Power system. However, the adopted PV – hydrogen technologies Power system reduces to zero the Green – House Gas (GHG) emissions. Moreover, the sensitivity analysis indicates that COE for the latter system can be further reduced by approximately 50% compared to its initial value. This could be achieved by reducing critical COE’s parameters, such as PEM electrolyser and fuel cell capital costs. Hence, a possible reduction on the capital costs of hydrogen energy equipment in combination with emissions reduction mentioned above could make hydrogen – based Power systems more competitive.
Frede Blaabjerg - One of the best experts on this subject based on the ideXlab platform.
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Autonomous Power management for interlinked AC-DC microgrids
CSEE Journal of Power and Energy Systems, 2018Co-Authors: Inam Ullah Nutkani, Lasantha Meegahapola, Loh Poh Chiang Andrew, Frede BlaabjergAbstract:The existing Power management schemes for interlinked AC-DC microgrids have several operational drawbacks. Some of the existing control schemes are designed with the main objective of sharing Power among the interlinked microgrids based on their loading conditions, while other schemes regulate the voltage of the interlinked microgrids without considering the specific loading conditions. However, the existing schemes cannot achieve both objectives efficiently. To address these issues, an Autonomous Power management scheme is proposed, which explicitly considers the specific loading condition of the DC microgrid before importing Power from the interlinked AC microgrid. This strategy enables voltage regulation in the DC microgrid, and also reduces the number of converters in operation. The proposed scheme is fully Autonomous while it retains the plug-nplay features for generators and tie-converters. The performance of the proposed control scheme has been validated under different operating scenarios. The results demonstrate the effectiveness of the proposed scheme in managing the Power deficit in the DC microgrid efficiently and Autonomously while maintaining the better voltage regulation in the DC microgrid.
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Autonomous Power Management in LVDC Microgrids Based on a Superimposed Frequency Droop
IEEE Transactions on Power Electronics, 2018Co-Authors: Saeed Peyghami, Hossein Mokhtari, Frede BlaabjergAbstract:In this paper, a novel droop approach for Autonomous Power management in low voltage DC (LVDC) microgrids based on a master–slave concept is presented. Conventional voltage-based droop approaches suffer from poor Power sharing due to line resistance effects on a virtual resistance, which is solved by introducing a communication system to increase the current sharing accuracy. In this paper, a virtual frequency is superimposed by the master units, and slave units determine their output Power according to the corresponding frequency-based droop characteristics. Unlike the voltage-droop methods, the proposed virtual frequency-droop approach can be applied for proportional Power management among the energy units and loads in the microgrid without utilizing any extra communication system. The effectiveness of the proposed scheme is evaluated by simulations and further validated by experiments.
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Power-Electronics-Enabled Autonomous Power Systems
IEEE Transactions on Industrial Electronics, 2017Co-Authors: Qing-chang Zhong, Frede Blaabjerg, Carlo CecatiAbstract:The eleven papers in this special section focus on Power electronics-enabled Autonomous systems. Power systems are going through a paradigm change from centralized generation to distributed generation and further onto smart grid. Millions of relatively small distributed energy resources (DER), including wind turbines, solar panels, electric vehicles and energy storage systems, and flexible loads are being integrated into Power systems through Power electronic converters. This imposes great challenges to the stability, scalability, reliability, security, and resiliency of future Power systems. This section joins the forces of the communities of control/systems theory, Power electronics, and Power systems to address various emerging issues of Power-electronics-enabled Autonomous Power systems, paving the way for large-scale deployment of DERs and flexible loads.
E. Varkaraki - One of the best experts on this subject based on the ideXlab platform.
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Techno-economic analysis of an Autonomous Power system integrating hydrogen technology as energy storage medium
Renewable Energy, 2011Co-Authors: George Tzamalis, E I Zoulias, Emmanuel Stamatakis, E. Varkaraki, Evripidis Lois, Fanourios ZannikosAbstract:Two different options for the Autonomous Power supply of rural or/and remote buildings are examined in this study. The first one involves a PV – diesel based Power system, while the second one integrates RES and hydrogen technologies for the development of a self – sustained Power system. The main objective is the replacement of the diesel generator and a comparison between these two options for Autonomous Power supply. Model simulations of the two Power systems before and after the replacement, an optimization of the component sizes and a techno – economic analysis have been performed for the purpose of this study. A sensitivity analysis taking into account future cost scenarios for hydrogen technologies is also presented. The results clearly show that the Cost of Energy Produced (COE) from the PV – hydrogen technologies Power system is extremely higher than the PV – diesel Power system. However, the adopted PV – hydrogen technologies Power system reduces to zero the Green – House Gas (GHG) emissions. Moreover, the sensitivity analysis indicates that COE for the latter system can be further reduced by approximately 50% compared to its initial value. This could be achieved by reducing critical COE’s parameters, such as PEM electrolyser and fuel cell capital costs. Hence, a possible reduction on the capital costs of hydrogen energy equipment in combination with emissions reduction mentioned above could make hydrogen – based Power systems more competitive.