过电压

It is beneficial to develop transmission line arresters. The development of the transmission line arrester is reviewed in this paper. Base on the over-voltage of 220kV transmission line, the nominal discharge current of 220kV transmission line arresters with series gap is analyzed, and the technical parameter of ZnO blocks is confirmed.

本文介绍了线路避雷器的发展状况，根据220kV输电线路的雷电过电压情况，计算了220kV有外串间隙线路避雷器的标称放电电流，确定了氧化锌电阻片的主要技术参数，特别是避雷器本体直流1mA的确定，保证了避雷器的灭弧电压大于220kV系统的最大工频电压。

A study of fault diagnosis in aircraft power system based on rough sets;2. An automatic method to measure power system harmonic;3. By using digital simulation method,this paper analyzes overvoltage of mine power system .

以煤矿井下供电系统为对象，利用数字仿真技术，通过对供电系统模型的仿真研究，探讨了各种参数对操作过电压的影响，为过电压的预防及供电安全提供了依据。

To reduce the arrester switching and lightning protection level as well as spare parts for the arrester , this paper suggests the 600 kV rated voltage of the line side arrester be selected.

提出了线路侧避雷器的额定电压选为600kV，以降低线路侧操作和雷电过电压的保护水平，减少避雷器备品和备件的建议。

This paper also discusses the issues we might meet and their resolutions. These problems include self-excitation of units, overvoltage, voltage-control, system stablitity, and this paper provides some ways to resolve these issues.

论文讨论了黑启动过程中可能出现的机组自励磁问题、操作过电压问题、电压控制问题、系统稳定问题，并针对这些问题提出了解决的对策。

The computed result indicated that the overvoltage of no-fault phase was determined by the instant voltage, when there is reigniting of fault phase.

仿真结果表明，健全相的过电压值取决于故障相电压发生重燃时刻的瞬间电压值，重燃击穿电压越大，一定时间内电弧重燃的次数越少。

Nowadays, ZnO Surge Arresters are more and more popularly applied in power system due to its excellent contribution as key equipment on limiting power system over-voltage.

氧化锌避雷器由于其优越的限制电气系统过电压的性能，它作为限制电气系统过电压的重要设备，近几年来，在电力系统中得到越来越广泛地使用。

An analysis is made on cause of the damage incident of quick fuses, controlled silicon and power control panels of the DC driving devices of Chuanwei High Speed Wire Plant due to overvoltage.

分析了因过电压造成川威高线直流传动装置快速熔断器、晶闸管及电源控制板损坏事故的原因，认为直流传动装置过电压保护措施必须完善，不能随意拆除。

The characteristics and the advantages of the VD4 Vacuum Circuit Breaker s are de-scribed,as well as its type test.

本文分析了断路器开断小电感性电流时产生截流过电压的原理，提出了抑制过电压的方法，论述了 VD4真空断路器的结构特点和优越性能，介绍了其完整的型式试验，总结了真空断路器的操作要领。

He therefore proposed the use of high-voltage shunt reactors, shunt resistors in the circuit breaker to install, using metal oxide surge arresters and other measures to limit over-voltage and, through the electromagnetic transient simulation verification, can operate in a safe range of over-voltage limit inside, so that the transmission system to maintain safe and stable operation.

因此，提出了使用高压并联电抗器、在断路器上加装并联电阻、采用金属氧化物避雷器等限制操作过电压的措施，并通过电磁暂态仿真计算验证，能将操作过电压限制在安全范围内，使输电系统保持安全、稳定运行。

Firstly, the protection of direct lighting about traction substation is discussed. Secondly the excessive voltage made by wave of lighting is analyzed and some advices is given for it .Then a actual traction substation is computed and analyzed about it's excessive voltage, some problem should be considered in-depth are put out. At last , dependability of the measure of protection against lighting in this paper is analyzed.

首先研究了牵引变电所的直击雷保护，接着对雷电侵入波过电压进行了分析，并提出了雷电侵入波保护措施，然后以一个实际的牵引变电所为例对雷电侵入波过电压进行了计算和分析，并进一步指出了计算中应进一步考虑的若干问题，最后对本文提到的防雷措施的可靠性进行了综合的分析。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。