The integration and accommodation of the wind and solar energy pose great challenges on today’s power system operation due to the intermittent nature and volatility of the wind and solar resources.High efficient larg...The integration and accommodation of the wind and solar energy pose great challenges on today’s power system operation due to the intermittent nature and volatility of the wind and solar resources.High efficient large-scale electrical energy storage is one of the most effective and economical solutions to those problems.After the comprehensive review of the existing storage technologies,this paper proposes an overall design scheme for the Non-supplementary Fired Compressed Air Energy Storage(NFCAES)system,including system design,modeling and efficiency assessment,as well as protection and control.Especially,the design principles of the multistage regenerative,i.e.heat recovery system which is used to fully recycle and utilize the waste heat from compression are provided,so as the overall system efficiency evaluation method.This paper theoretically ascertains the storage decoupling rules in the potential and internal energy of molecular compressed air and reveals the conversion mechanism of gas,heat,power,electricity and other forms of energy.On this basis,a 500-k W physical simulation system of CAES system(TICC-500,Tsinghua-IPCCAS-CEPRI-CAES)is built,which passed a system-wide 420-k W load power generation test with less pollution and zero carbon emissions.Besides,the multi-form energy conversion of multi-stage regenerative CAES and storage efficiency is verified,especially its incomparable superiority in solving the uncertainty problem in wind and solar power generation.Finally,the propaganda and application scenario of the CAES system in China is introduced.展开更多
China is rich in solar and wind energy resources,of which the proportion of China's power sources has been rapidly increasing.Such fluctuating and intermittent energy sources will bring significant challenges to t...China is rich in solar and wind energy resources,of which the proportion of China's power sources has been rapidly increasing.Such fluctuating and intermittent energy sources will bring significant challenges to the safe and stable operation power system.However,making use of the spatiotemporal complementarities between different renewable energy resources is a feasible way to level fluctuating power especially when they have a widely geographical dispersion.Based on the data provided by China Meteorological Administration(CMA),this research explores the spatiotemporal complementarities between wind and solar energy resources.This paper nondimensionalizes hourly wind speed and global solar radiation data and employs several indexes to compare the smoothing effect with various combining scenarios.The results show that combining wind and solar powers within a certain area can cause a fall of zero-power or very-full power hours.Besides,combining different resources improves 'smoothness' in power output when compared with that from each individual resource.However,under hourly time scale,when the dispersion of sites is large enough,the smoothing effect of combining the dispersed wind power is very close to the combination of those two different resources.Nevertheless,this complementary effect is much better than that of just combining solar energy resources.展开更多
基金Science and Technology Fund of SGCC(Grant No.KJ-2012-627)The National Natural Science Foundation of China(Grant No.51321005)
文摘The integration and accommodation of the wind and solar energy pose great challenges on today’s power system operation due to the intermittent nature and volatility of the wind and solar resources.High efficient large-scale electrical energy storage is one of the most effective and economical solutions to those problems.After the comprehensive review of the existing storage technologies,this paper proposes an overall design scheme for the Non-supplementary Fired Compressed Air Energy Storage(NFCAES)system,including system design,modeling and efficiency assessment,as well as protection and control.Especially,the design principles of the multistage regenerative,i.e.heat recovery system which is used to fully recycle and utilize the waste heat from compression are provided,so as the overall system efficiency evaluation method.This paper theoretically ascertains the storage decoupling rules in the potential and internal energy of molecular compressed air and reveals the conversion mechanism of gas,heat,power,electricity and other forms of energy.On this basis,a 500-k W physical simulation system of CAES system(TICC-500,Tsinghua-IPCCAS-CEPRI-CAES)is built,which passed a system-wide 420-k W load power generation test with less pollution and zero carbon emissions.Besides,the multi-form energy conversion of multi-stage regenerative CAES and storage efficiency is verified,especially its incomparable superiority in solving the uncertainty problem in wind and solar power generation.Finally,the propaganda and application scenario of the CAES system in China is introduced.
基金supported by the National Key Basic Research Program of China ("973" Program) (Grant No. 2012CB215204)
文摘China is rich in solar and wind energy resources,of which the proportion of China's power sources has been rapidly increasing.Such fluctuating and intermittent energy sources will bring significant challenges to the safe and stable operation power system.However,making use of the spatiotemporal complementarities between different renewable energy resources is a feasible way to level fluctuating power especially when they have a widely geographical dispersion.Based on the data provided by China Meteorological Administration(CMA),this research explores the spatiotemporal complementarities between wind and solar energy resources.This paper nondimensionalizes hourly wind speed and global solar radiation data and employs several indexes to compare the smoothing effect with various combining scenarios.The results show that combining wind and solar powers within a certain area can cause a fall of zero-power or very-full power hours.Besides,combining different resources improves 'smoothness' in power output when compared with that from each individual resource.However,under hourly time scale,when the dispersion of sites is large enough,the smoothing effect of combining the dispersed wind power is very close to the combination of those two different resources.Nevertheless,this complementary effect is much better than that of just combining solar energy resources.
