The Experts below are selected from a list of 20991 Experts worldwide ranked by ideXlab platform
A G Dutton - One of the best experts on this subject based on the ideXlab platform.
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an Offshore Wind Energy geographic information system owe gis for assessment of the uk s Offshore Wind Energy potential
Renewable Energy, 2016Co-Authors: Stefano Cavazzi, A G DuttonAbstract:An Offshore Wind Energy Geographic Information System (OWE-GIS) has been developed for the purpose of assessing the economically accessible Offshore Wind Energy resource for the United Kingdom.
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an Offshore Wind Energy geographic information system owe gis for assessment of the uk s Offshore Wind Energy potential
Renewable Energy, 2016Co-Authors: Stefano Cavazzi, A G DuttonAbstract:Abstract An Offshore Wind Energy Geographic Information System (OWE-GIS) has been developed for the purpose of assessing the economically accessible Offshore Wind Energy resource for the United Kingdom. The UK OWE-GIS estimates the costs of Energy from an Offshore Wind farm taking account of the major capital components; development costs dependent on water depth and distance from nearest ports or grid connection points; the potential Energy production dependent on annual average Wind speed, potential array losses, and turbine availability; operations and maintenance costs; and financial parameters such as discount rate and project lifetime. A sensitivity analysis is presented to show the influence of discount rate, project lifetime, and assumptions about overall capital expenditure (CAPEX), availability, and annual mean Wind speed.
Jul-ki Seok - One of the best experts on this subject based on the ideXlab platform.
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high gain resonant switched capacitor cell based dc dc converter for Offshore Wind Energy systems
IEEE Transactions on Power Electronics, 2015Co-Authors: Amir Parastar, Jul-ki SeokAbstract:With the increasing integration of renewable Energy generation into high-power grids, transmission at the dc level is becoming increasingly more useful than ac transmission. In this regard, emerging applications, such as Offshore Wind farms, require a high voltage gain dc/dc conversion system to interface with high-power transmission networks. This paper presents a new high-voltage gain resonant switched-capacitor dc/dc converter for high-power Offshore Wind Energy systems. The proposed dc/dc converter is characterized by the resonant switching transitions to achieve minimal switching losses and maximum system efficiency. Therefore, a higher switching frequency is conceivable to attain a higher power density. The double stage output voltage of the proposed converter operates at seven times as high as the input voltage with a small device count. The output capacitors are charged and discharged continuously by a 180° phase shift with respect to each other to eliminate the output voltage ripples with the low capacitance requirements. The proposed series-modular and cascade configurations show the intrinsic advantage of being readily applicable to multistage power switching converters. The developed topology has been implemented on a 5-kW prototype converter to test its feasibility.
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Multilevel Modular DC/DC Power Converter for High-Voltage DC-Connected Offshore Wind Energy Applications
IEEE Transactions on Industrial Electronics, 2015Co-Authors: Amir Parastar, Yong Cheol Kang, Jul-ki SeokAbstract:Recently, the interest in Offshore Wind farms has been significantly increased because of the stronger and more stable Winds at sea, which will lead to a higher power production. DC/DC power conversion solutions are becoming more popular for fulfilling the growing challenges in the high-voltage (HV) dc-connected Offshore Wind power industry. This paper presents several multilevel modular dc/dc conversion systems based on the capacitor-clamped (CC) module concept for high-power Offshore Wind Energy applications. Two types of the CC modules, namely, the double-switch (DS) module and the switchless (SL) module, are discussed. A soft-switching technique is adopted to achieve minimal switching losses and the maximum system efficiency. Theoretical analysis is carried out for the 2n+1-level cascaded configurations based on the CC modules. The inherent interleaving property of the proposed configurations effectively reduces the output voltage ripple without adding extra components. A cascaded hybrid topology is developed by the combination of DS and SL modules. The proposed hybrid topology achieves higher efficiency and lower component count. The cascaded hybrid approach is evaluated in terms of the power device count, reliability, and efficiency against other HV dc/dc topologies to demonstrate its advantage for HVDC-connected Offshore Wind farms. The experimental results of two 5-kW prototype CC converters are presented to validate the theoretical analysis and principles as well as attest the feasibility of the proposed topologies.
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high power solid state step up resonant marx modulator with continuous output current for Offshore Wind Energy systems
Energy Conversion Congress and Exposition, 2013Co-Authors: Amir Parastar, Ali Gandomkar, Mingguo Jin, Jul-ki SeokAbstract:This paper presents a new solid-state step-up resonant Marx modulator (S3RM2) with a continuous output current for Offshore Wind Energy applications. The developed topology is based on the Marx generator concept, where magnetic switches are replaced by solid-state switching devices. The proposed converter is characterized by resonant switching transitions to achieve minimal switching losses and maximum system efficiency. Therefore, a higher switching frequency is conceivable to attain a higher power density. A double module consists of the 4-active switches operating at the output voltage up to seven times as high as the input voltage. An appropriate output capacitor size is considered to eliminate output voltage ripples and work as charge storage. The series-modular and cascade configurations of the S3RM2 have the advantage of being readily applicable to multilevel power switching converters with an arbitrary number of levels. The developed topology has been implemented on a 5-kW prototype converter to verify its feasibility.
Erdogan Simsek - One of the best experts on this subject based on the ideXlab platform.
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Offshore Wind power development in europe and its comparison with onshore counterpart
Renewable & Sustainable Energy Reviews, 2011Co-Authors: Mehmet Bilgili, Abdullah Yasar, Erdogan SimsekAbstract:Wind power, as a renewable source of Energy, produces no emissions and is an excellent alternative in environmental terms to conventional electricity production based on fuels such as oil, coal or natural gas. At present, the vast majority of Wind power is generated from onshore Wind farms. However, their growth is limited by the lack of inexpensive land near major population centers and the visual pollution caused by large Wind turbines. Comparing with onshore Wind power, Offshore Winds tend to flow at higher speeds than onshore Winds, thus it allows turbines to produce more electricity. Estimates predict a huge increase in Wind Energy development over the next 20 years. Much of this development will be Offshore Wind Energy. This implies that great investment will be done in Offshore Wind farms over the next decades. For this reason, Offshore Wind farms promise to become an important source of Energy in the near future. In this study, history, current status, investment cost, employment, industry and installation of Offshore Wind Energy in Europe are investigated in detail, and also compared to its onshore counterpart.
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Offshore Wind power development in europe and its comparison with onshore counterpart
Renewable & Sustainable Energy Reviews, 2011Co-Authors: Mehmet Bilgili, Abdulkadir Yasar, Erdogan SimsekAbstract:Wind power, as a renewable source of Energy, produces no emissions and is an excellent alternative in environmental terms to conventional electricity production based on fuels such as oil, coal or natural gas. At present, the vast majority of Wind power is generated from onshore Wind farms. However, their growth is limited by the lack of inexpensive land near major population centers and the visual pollution caused by large Wind turbines. Comparing with onshore Wind power, Offshore Winds tend to flow at higher speeds than onshore Winds, thus it allows turbines to produce more electricity. Estimates predict a huge increase in Wind Energy development over the next 20 years. Much of this development will be Offshore Wind Energy. This implies that great investment will be done in Offshore Wind farms over the next decades. For this reason, Offshore Wind farms promise to become an important source of Energy in the near future. In this study, history, current status, investment cost, employment, industry and installation of Offshore Wind Energy in Europe are investigated in detail, and also compared to its onshore counterpart.
Stefano Cavazzi - One of the best experts on this subject based on the ideXlab platform.
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an Offshore Wind Energy geographic information system owe gis for assessment of the uk s Offshore Wind Energy potential
Renewable Energy, 2016Co-Authors: Stefano Cavazzi, A G DuttonAbstract:An Offshore Wind Energy Geographic Information System (OWE-GIS) has been developed for the purpose of assessing the economically accessible Offshore Wind Energy resource for the United Kingdom.
-
an Offshore Wind Energy geographic information system owe gis for assessment of the uk s Offshore Wind Energy potential
Renewable Energy, 2016Co-Authors: Stefano Cavazzi, A G DuttonAbstract:Abstract An Offshore Wind Energy Geographic Information System (OWE-GIS) has been developed for the purpose of assessing the economically accessible Offshore Wind Energy resource for the United Kingdom. The UK OWE-GIS estimates the costs of Energy from an Offshore Wind farm taking account of the major capital components; development costs dependent on water depth and distance from nearest ports or grid connection points; the potential Energy production dependent on annual average Wind speed, potential array losses, and turbine availability; operations and maintenance costs; and financial parameters such as discount rate and project lifetime. A sensitivity analysis is presented to show the influence of discount rate, project lifetime, and assumptions about overall capital expenditure (CAPEX), availability, and annual mean Wind speed.
Amir Parastar - One of the best experts on this subject based on the ideXlab platform.
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high gain resonant switched capacitor cell based dc dc converter for Offshore Wind Energy systems
IEEE Transactions on Power Electronics, 2015Co-Authors: Amir Parastar, Jul-ki SeokAbstract:With the increasing integration of renewable Energy generation into high-power grids, transmission at the dc level is becoming increasingly more useful than ac transmission. In this regard, emerging applications, such as Offshore Wind farms, require a high voltage gain dc/dc conversion system to interface with high-power transmission networks. This paper presents a new high-voltage gain resonant switched-capacitor dc/dc converter for high-power Offshore Wind Energy systems. The proposed dc/dc converter is characterized by the resonant switching transitions to achieve minimal switching losses and maximum system efficiency. Therefore, a higher switching frequency is conceivable to attain a higher power density. The double stage output voltage of the proposed converter operates at seven times as high as the input voltage with a small device count. The output capacitors are charged and discharged continuously by a 180° phase shift with respect to each other to eliminate the output voltage ripples with the low capacitance requirements. The proposed series-modular and cascade configurations show the intrinsic advantage of being readily applicable to multistage power switching converters. The developed topology has been implemented on a 5-kW prototype converter to test its feasibility.
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Multilevel Modular DC/DC Power Converter for High-Voltage DC-Connected Offshore Wind Energy Applications
IEEE Transactions on Industrial Electronics, 2015Co-Authors: Amir Parastar, Yong Cheol Kang, Jul-ki SeokAbstract:Recently, the interest in Offshore Wind farms has been significantly increased because of the stronger and more stable Winds at sea, which will lead to a higher power production. DC/DC power conversion solutions are becoming more popular for fulfilling the growing challenges in the high-voltage (HV) dc-connected Offshore Wind power industry. This paper presents several multilevel modular dc/dc conversion systems based on the capacitor-clamped (CC) module concept for high-power Offshore Wind Energy applications. Two types of the CC modules, namely, the double-switch (DS) module and the switchless (SL) module, are discussed. A soft-switching technique is adopted to achieve minimal switching losses and the maximum system efficiency. Theoretical analysis is carried out for the 2n+1-level cascaded configurations based on the CC modules. The inherent interleaving property of the proposed configurations effectively reduces the output voltage ripple without adding extra components. A cascaded hybrid topology is developed by the combination of DS and SL modules. The proposed hybrid topology achieves higher efficiency and lower component count. The cascaded hybrid approach is evaluated in terms of the power device count, reliability, and efficiency against other HV dc/dc topologies to demonstrate its advantage for HVDC-connected Offshore Wind farms. The experimental results of two 5-kW prototype CC converters are presented to validate the theoretical analysis and principles as well as attest the feasibility of the proposed topologies.
-
high power solid state step up resonant marx modulator with continuous output current for Offshore Wind Energy systems
Energy Conversion Congress and Exposition, 2013Co-Authors: Amir Parastar, Ali Gandomkar, Mingguo Jin, Jul-ki SeokAbstract:This paper presents a new solid-state step-up resonant Marx modulator (S3RM2) with a continuous output current for Offshore Wind Energy applications. The developed topology is based on the Marx generator concept, where magnetic switches are replaced by solid-state switching devices. The proposed converter is characterized by resonant switching transitions to achieve minimal switching losses and maximum system efficiency. Therefore, a higher switching frequency is conceivable to attain a higher power density. A double module consists of the 4-active switches operating at the output voltage up to seven times as high as the input voltage. An appropriate output capacitor size is considered to eliminate output voltage ripples and work as charge storage. The series-modular and cascade configurations of the S3RM2 have the advantage of being readily applicable to multilevel power switching converters with an arbitrary number of levels. The developed topology has been implemented on a 5-kW prototype converter to verify its feasibility.
