The result of investigation shows if that connecting small unit which had automatic disconnection to 110kV grid at the power grid terminal, there will be no more influence to the transient stability of main power grid.
为了提高电网安全稳定分析的有效性和适应性,文中使用中国版PSD-BPA稳定分析程序,针对2006年安徽电网从110kV接入系统的小机组励磁系统详细模型对220kV主网安全稳定水平的影响进行了专项研究。
A new type of light weight and small size machine with sprinkling irrigation and hose irrigation was introduced.
介绍了一种新型喷灌和软管灌溉两用轻小机组的结构和工作原理,该新型灌溉机组由绞盘车提供行走动力和压力水源,通过喷水车进行喷洒灌溉。
The wings of light weight and small size machine for sprinkling irrigation and hose irrigation adopt multi-strides truss with fast disassembling & connection structure.
喷灌和软管灌溉两用轻小机组机翼采用多跨桁架快速拆装连接结构,可根据地块宽度进行调节机翼跨数和喷幅,拓展了轻小机组的适用功能;在两用轻小机组上可安装低压折射式喷头或软管洒水带,既降低系统工作压力和能耗,又能调整灌溉机组的灌溉方式和灌溉水量,提高了机组的适应能力;在机组上还装有高度调节装置,可根据不同作物或不同生育期作物的生长状况调节机组的喷洒高度,尽可能减少风对喷洒均匀度的影响和水分的漂移损失;机组行走动力来自供水系统的绞盘机车。
Based on the focus pre-search a method is presented to measure the characteristics of the traverse focus error detection system:focus offset,focus error sensitivity and linear range.
利用聚焦预搜索原理,测量出小机芯离焦检测系统特性的关键参数:离焦偏置、离焦灵敏度和线性区范围。
The radial and tangential tilt angles between the emission laser axis of objective lens and test disc are the key parameters to develop,produce and detect the DVD traverses.
DVD小机芯物镜出射光主光轴与盘片在切向和径向的倾角是DVD小机芯开发、生产和检测的两个重要参数。
Micro milling technology of three dimensional micro parts manufacturing with micro machines is a novel manufacturing technology.
利用微小型机床进行三维微小零件的微细切削加工是一项新兴的制造技术,为了满足微小型化产品的需求,本课题进行了超精密微小机床的硬件结构设计、软件设计以及伺服系统的设计。