电网

The distribution law of furan content in oil of large step-down transformers in Shanghai Grid is researched by statistical analysis.

摘要利用统计分析技术，研究了上海地区电网大型降压变油中糠醛含量的分布规律，提出了在其应用中应注意的问题。

The structures, features, application principles and on-site applications of six kinds of prevention products developed on the basis of above mentioned methods, i.e., the insulation striped arc-protection fitting, clamping post porcelain/ composite insulator, stab-type arc-protection fitting, stab-type clamping post porcelain/composite insulator, ring electrode MOA with external series gap and stab-type electrode MOA with external series gap, are presented.

分析了10 kV配电网绝缘导线雷击断线机理，归纳出"疏导式"和"堵塞式"2种防护思路，介绍了基于2种防护思路研制的剥线型防弧金具、放电箝位柱式瓷/复合绝缘子、穿刺型防弧金具、穿刺型放电箝位柱式瓷/复合绝缘子、环形电极带外串联间隙金属氧化物避雷器和穿刺电极带外串联间隙金属氧化物避雷器6种防护产品的结构、特点、应用原则及现场应用情况。

Automatic and graphical relaying protection setting and calculation of faults in electric networks are the certain trend of power system development.

继电保护整定计算和电网故障计算的自动化和图形化是电力系统发展的必然趋势。

A discussion on scheme of improving structure of East China power grid to reduce short circuit capability.

关于改善华东电网结构、降低短路容量方案的探讨。

Power system ; ultral high voltage power grid ; short circuit current ; limiting measure

电力系统；特高压电网；短路电流；限流措施

When the grid suffers a short circuit fault, the relays in the grid, which have cooperate relation, find the element that the fault locates in, and insulate this element from the grid rapidly.

当电网发生短路故障时，安装于系统各个元件上的有着相互配合关系的保护装置判别出发生故障的元件，并迅速将故障元件从系统中隔离出来，使得系统剩余部分能正常运行。

When serious fault occurs on the power receiving section of southern Beijing-Tianjin power grid, including Dafang double circuit lines, Fangbao line and Baoba line, generator tripping and load shedding should be done to ensure the stability of the power grid.

当京津南部受电断面(大房双+房保线+保霸线)发生严重故障时，采取切机、切负荷措施，防止大面积停电，保证京津南部电网的安全稳定运行。

Using Markov model, it analyzes the availability of a large power grid real-time control system based on BOBSM.

采用马尔可夫模型，对一个基于该中间件的大型电网实时监控系统的可靠性进行了分析。

A study on state estimation mode for self-healing control of power grid.

电网自愈控制中的状态估计模式研究。

To build up network security and reliable system, this paper analyzed advantage and weak parts of current grid framework and gave suggestions for optimization and decision-making.

本文从网架结构的安全性出发，分析了现有各类网架的优点及薄弱环节，为电网网架的优化与决策方向提供了科学依据。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。