压缩空气储能(Compressed Air Energy Storage,CAES)具有建设成本低、寿命长、容量大和存储方便等特点,部署在综合能源微网中有助于提升系统的经济性、清洁性和可靠性.但是,CAES具有多能流耦合、结构机理复杂、多种规律并存等特点,给微...压缩空气储能(Compressed Air Energy Storage,CAES)具有建设成本低、寿命长、容量大和存储方便等特点,部署在综合能源微网中有助于提升系统的经济性、清洁性和可靠性.但是,CAES具有多能流耦合、结构机理复杂、多种规律并存等特点,给微网的安全可靠供能提出了更高要求.为分析CAES对综合能源微网可靠性的影响,文中提出了一种计及压缩空气储能的综合能源微网可靠性评估方法.首先针对含CAES的典型综合能源微网,构建了热力系统、CAES系统和分布式电源的物理模型;然后,提出了基于影响增量的含CAES综合能源微网可靠性高效评估方法,大大提升了传统状态枚举的可靠性评估效率;最后,通过我国青海某农业示范园区的实际系统算例,验证了所提方法的有效性和实用性.展开更多
The satellite-derived wind from cloud and moisture features of geostationary satellites is an important data source for numerical weather prediction （NWP） models. These datasets and global positioning system radio o...The satellite-derived wind from cloud and moisture features of geostationary satellites is an important data source for numerical weather prediction （NWP） models. These datasets and global positioning system radio occultation （GPSRO） satellite radiances are assimilated in the four-dimensional variational atmospheric data assimilation system of the UKMO Unified Model in India. This study focuses on the importance of these data in the NWP system and their impact on short-term 24-h forecasts. The quality of the wind observations is compared to the short-range forecast from the model background. The observation increments （observation minus background） are computed as the satellite-derived wind minus the model forecast with a 6-h lead time. The results show the model background has a large easterly wind component compared to satellite observations. The importance of each observation in the analysis is studied using an adjoint-based forecast sensitivity to observation method. The results show that at least around 50% of all types of satellite observations are beneficial. In terms of individual contribution, METEOSAT-7 shows a higher percentage of impact （nearly 50%）, as compared to GEOS, MTSAT-2 and METEOSAT-10, all of which have a less than 25% impact. In addition, the impact of GPSRO, infrared atmospheric sounding interferometer （IASI） and atmospheric infrared sounder （AIRS） data is calculated. The GPSRO observations have beneficial impacts up to 50 km. Over the Southern Hemisphere, the high spectral radiances from IASI and AIRS show a greater impact than over the Northern Hemisphere. The results in this study can be used for further improvements in the use of new and existing satellite observations.展开更多
文摘压缩空气储能(Compressed Air Energy Storage,CAES)具有建设成本低、寿命长、容量大和存储方便等特点,部署在综合能源微网中有助于提升系统的经济性、清洁性和可靠性.但是,CAES具有多能流耦合、结构机理复杂、多种规律并存等特点,给微网的安全可靠供能提出了更高要求.为分析CAES对综合能源微网可靠性的影响,文中提出了一种计及压缩空气储能的综合能源微网可靠性评估方法.首先针对含CAES的典型综合能源微网,构建了热力系统、CAES系统和分布式电源的物理模型;然后,提出了基于影响增量的含CAES综合能源微网可靠性高效评估方法,大大提升了传统状态枚举的可靠性评估效率;最后,通过我国青海某农业示范园区的实际系统算例,验证了所提方法的有效性和实用性.
基金supported by the Korea Meteorological Administration Research and Development Program(Grant No.KMIPA 2015-1090)
文摘The satellite-derived wind from cloud and moisture features of geostationary satellites is an important data source for numerical weather prediction （NWP） models. These datasets and global positioning system radio occultation （GPSRO） satellite radiances are assimilated in the four-dimensional variational atmospheric data assimilation system of the UKMO Unified Model in India. This study focuses on the importance of these data in the NWP system and their impact on short-term 24-h forecasts. The quality of the wind observations is compared to the short-range forecast from the model background. The observation increments （observation minus background） are computed as the satellite-derived wind minus the model forecast with a 6-h lead time. The results show the model background has a large easterly wind component compared to satellite observations. The importance of each observation in the analysis is studied using an adjoint-based forecast sensitivity to observation method. The results show that at least around 50% of all types of satellite observations are beneficial. In terms of individual contribution, METEOSAT-7 shows a higher percentage of impact （nearly 50%）, as compared to GEOS, MTSAT-2 and METEOSAT-10, all of which have a less than 25% impact. In addition, the impact of GPSRO, infrared atmospheric sounding interferometer （IASI） and atmospheric infrared sounder （AIRS） data is calculated. The GPSRO observations have beneficial impacts up to 50 km. Over the Southern Hemisphere, the high spectral radiances from IASI and AIRS show a greater impact than over the Northern Hemisphere. The results in this study can be used for further improvements in the use of new and existing satellite observations.
