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The fault arc characteritie of EHV transmission lines is investigated, the fault arc EMTDC model is set up, and the result of simulation confirms to the result of experiment.

考虑到EHV电网故障带有电弧的特点，利用电力暂态信号小波分析方法的研究结果，首次提出基于小波分析的EHV输电线路单端量暂态保护机理和实现方案，该保护原理能够实时检测EHV电网线路故障，区分区内外故障。

The biconditional markers can he placed at equal or unequal intervals according to train positioning precision, and they may encode the positions of the complete rail track or only a section between two balise devices.

二值标记可以根据列车定位精度的需要等间隔或不等间隔布置，既可以对整条轨道线路统一编码，也可以与既有应答器相结合应用，每段应答器之间的轨道线路采用相同的编码。

Current differential protection is one of the first choices for main protection of EHV transmission lines,so it is worth to research to improve the reliability and sensitivity of line current differential protection.

华中科技大学电气与电子工程学院，湖北省武汉市 430074电流差动保护是超高压线路主保护的首选之一，提高线路电流差动保护的可靠性和灵敏性是一个值得研究的问题。

Accordingly, it is necessary to consider that shunt reactor should be cut off in the operation mode of heavy load. This paper analyzes the roles of shunt reactors...

理论分析与仿真研究表明，所提出的线路保护与并联电抗器之间的动作逻辑关系不仅保证了750kV输电线路正常经济运行，又达到了并联电抗器抑制过电压等方面的作用。

They presume that repairs in the supply line, in communication lines, will be forthcoming and not permanently, disruptively, devastated.

他们推测很快就会有人维修供给线路和通讯线路，这种损坏不是永久性的，破坏性的和具有毁灭性的。

To solve the problem that accuracy of traditional fault location algorithm for traction networks is affected by integer, non-integer harmonics, electric locomotive and fluctuation of traction line s parameters, a novel fault location algorithm is presented which uses fault-generated transient voltages measured at single terminal.

针对牵引网目前广泛应用的故障测距算法易受整次、非整次谐波、机车负荷以及线路参数波动的影响，提出一种利用线路单端暂态电压进行精确故障测距的新算法。

Another line known as the Small Hall of line, there is the theme of "under the Second Empire fontainebleau" Napoleon I of the museum exhibition.

另一条线路被称为小殿线路，这里有主题为"第二帝国下的枫丹白露"的拿破仑一世博物馆的展览。

The present procedure uses a combination of a circuit model analysis and a full-wave method,where the circuit model acts as a reference.

现在的程序使用线路模型分析的一个组合和线路模型担任叁考的一个全波方法。

In order to improve efficiency of making electric power line overhaul plan ,the coloring problem of graph theory is combined to make Liaoning electric power line overhaul plan by using an improved ant colony algorithm.

为了提高制定电力线路检修计划的效率，结合图论中的图着色问题，对辽宁省电力有限公司的线路检修计划进行了制定。

By means of forced synchronization of current in thyristor branch with the line current, the mode switching from capacitive mode to Bypass can be implemented. In the switching strategy from capacitive mode to inductive veriner mode, a method of thyristor conditional firing is put forward. The thyristors will be fired and conducted on condition that both line current and capacitor voltage are inphase.

通过强制晶闸管支路电流与线路电流同步，实现由容性区到Bypass模式的切换；在由容性区到感性微调模式切换的过程中提出了晶闸管条件触发的方法，即当线路电流和电容电压满足同向条件时晶闸管才触发导通。

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。