最新的国家标准规定大型光伏发电站应满足低电压穿越(LVRT)的要求。提出了适用于高海拔地区的并网光伏电站LVRT检测装置开发方案,并对检测装置的拓扑结构和试验方法进行了论述。检测装置采用了阻抗分压式的结构,全自动化设计,无须人工...最新的国家标准规定大型光伏发电站应满足低电压穿越(LVRT)的要求。提出了适用于高海拔地区的并网光伏电站LVRT检测装置开发方案,并对检测装置的拓扑结构和试验方法进行了论述。检测装置采用了阻抗分压式的结构,全自动化设计,无须人工进行电抗器接线,能够实现不同电压等级(35 k V和10 k V)的三相对称跌落试验、两相相间不对称跌落试验和单相接地不对称跌落试验。装置采用移动车载的形式,全部设备集成在封闭的集装箱体内,适合西北高海拔地区开展光伏并网测试工作,确保光伏电站并网质量,保障电网安全稳定运行。展开更多
Conventional manometry presents significant challenges,especially in assessment of pharyngeal swallowing,because of the asymmetry and deglutitive movements of oropharyngeal structures.It only provides information abou...Conventional manometry presents significant challenges,especially in assessment of pharyngeal swallowing,because of the asymmetry and deglutitive movements of oropharyngeal structures.It only provides information about intraluminal pressure and thus it is difficult to study functional details of esophageal motility disorders.New technology of solid high resolution impedance manometry(HRIM),with 32 pressure sensors and 6 impedance sensors,is likely to provide better assessment of pharyngeal swallowing as well as more information about esophageal motility disorders.However,the clinical usefulness of application of HRIM in patients with oropharyngeal dysphagia or esophageal dysphagia is not known.We experienced a case of Huntington's disease presenting with both oropharyngeal and esophageal dysphagia,in which HRIM revealed the mechanism of oropharyngeal dysphagia and provided comprehensive information about esophageal dysphagia.展开更多
文摘最新的国家标准规定大型光伏发电站应满足低电压穿越(LVRT)的要求。提出了适用于高海拔地区的并网光伏电站LVRT检测装置开发方案,并对检测装置的拓扑结构和试验方法进行了论述。检测装置采用了阻抗分压式的结构,全自动化设计,无须人工进行电抗器接线,能够实现不同电压等级(35 k V和10 k V)的三相对称跌落试验、两相相间不对称跌落试验和单相接地不对称跌落试验。装置采用移动车载的形式,全部设备集成在封闭的集装箱体内,适合西北高海拔地区开展光伏并网测试工作,确保光伏电站并网质量,保障电网安全稳定运行。
文摘Conventional manometry presents significant challenges,especially in assessment of pharyngeal swallowing,because of the asymmetry and deglutitive movements of oropharyngeal structures.It only provides information about intraluminal pressure and thus it is difficult to study functional details of esophageal motility disorders.New technology of solid high resolution impedance manometry(HRIM),with 32 pressure sensors and 6 impedance sensors,is likely to provide better assessment of pharyngeal swallowing as well as more information about esophageal motility disorders.However,the clinical usefulness of application of HRIM in patients with oropharyngeal dysphagia or esophageal dysphagia is not known.We experienced a case of Huntington's disease presenting with both oropharyngeal and esophageal dysphagia,in which HRIM revealed the mechanism of oropharyngeal dysphagia and provided comprehensive information about esophageal dysphagia.
