Renewable energies, such as solar and wind power, are increasingly being introduced as alternative energy sources on a glosbal scale toward a low-carbon society. For the next generation power network, which uses a lar...Renewable energies, such as solar and wind power, are increasingly being introduced as alternative energy sources on a glosbal scale toward a low-carbon society. For the next generation power network, which uses a large number of these distributed power generation sources, energy storage technologies will be indispensable. Among these technologies, battery energy storage technology is considered to be most viable. Sumitomo Electric Industries, Ltd. has developed a redox flow battery system suitable for large scale energy storage, and carried out several demonstration projects on the stabilization of renewable energy output using the redox flow battery system. This paper describes the advantages of the redox flow battery and reviews the demonstration projects.展开更多
Microgrids with hybrid renewable energy sources are increasing and it is a promising solution to electrify remote areas where distribution network expansion is not feasible or not economical.Standalone microgrids with...Microgrids with hybrid renewable energy sources are increasing and it is a promising solution to electrify remote areas where distribution network expansion is not feasible or not economical.Standalone microgrids with environment-friendly hybrid energy sources is a cost-effective solution that ensures system reliability and energy security.This paper determines the optimal capacity,energy dispatching and techno-economic benefits of standalone microgrid in remote area in Tamilnadu,India.Microgrids with hybrid energy sources comprising photovoltaic(PV),wind turbine(WT),battery energy storage system(BESS)and diesel generator(DG)are considered in this paper.Various case studies are implemented with hybrid energy sources and for each case study a comparative analysis of techno-economic benefits is demonstrated.Eight different configurations of hybrid energy sources are modeled with renewable fractions of 50%,60%,65%,and 100%,respectively.The optimization analysis is carried out using Hybrid Optimization Model for Electric Renewable(HOMER)software.Impact of demand response is also demonstrated on energy dispatching and technoeconomic benefits.Simulation results are obtained for the optimal capacity of PV,WT,DG,converter,and BESS,charging/discharging pattern,state of charge(SOC),net present cost(NPC),cost of energy(COE),initial cost,operation cost,fuel cost,greenhouse gas emission penalty and payback period considering seasonal load variation.It is observed that PV+BESS is the most economical configuration.COE in standalone microgrid is higher than the conventional grid price.The results show that CO2 emissions in hybrid PV+WT+DG+BESS are reduced by about 68%compared with the traditional isolated distribution system with DG.展开更多
文摘Renewable energies, such as solar and wind power, are increasingly being introduced as alternative energy sources on a glosbal scale toward a low-carbon society. For the next generation power network, which uses a large number of these distributed power generation sources, energy storage technologies will be indispensable. Among these technologies, battery energy storage technology is considered to be most viable. Sumitomo Electric Industries, Ltd. has developed a redox flow battery system suitable for large scale energy storage, and carried out several demonstration projects on the stabilization of renewable energy output using the redox flow battery system. This paper describes the advantages of the redox flow battery and reviews the demonstration projects.
文摘Microgrids with hybrid renewable energy sources are increasing and it is a promising solution to electrify remote areas where distribution network expansion is not feasible or not economical.Standalone microgrids with environment-friendly hybrid energy sources is a cost-effective solution that ensures system reliability and energy security.This paper determines the optimal capacity,energy dispatching and techno-economic benefits of standalone microgrid in remote area in Tamilnadu,India.Microgrids with hybrid energy sources comprising photovoltaic(PV),wind turbine(WT),battery energy storage system(BESS)and diesel generator(DG)are considered in this paper.Various case studies are implemented with hybrid energy sources and for each case study a comparative analysis of techno-economic benefits is demonstrated.Eight different configurations of hybrid energy sources are modeled with renewable fractions of 50%,60%,65%,and 100%,respectively.The optimization analysis is carried out using Hybrid Optimization Model for Electric Renewable(HOMER)software.Impact of demand response is also demonstrated on energy dispatching and technoeconomic benefits.Simulation results are obtained for the optimal capacity of PV,WT,DG,converter,and BESS,charging/discharging pattern,state of charge(SOC),net present cost(NPC),cost of energy(COE),initial cost,operation cost,fuel cost,greenhouse gas emission penalty and payback period considering seasonal load variation.It is observed that PV+BESS is the most economical configuration.COE in standalone microgrid is higher than the conventional grid price.The results show that CO2 emissions in hybrid PV+WT+DG+BESS are reduced by about 68%compared with the traditional isolated distribution system with DG.
