过电压

For confirming the method's efficiency, the turn-off transient mathematical model based on the chopper circuit is developed according to the proposed mathematic model of the turn-off transient current through IGCT, in which the RC-snubbers of IGCT, the stray inductance of chopper circuit and DC-link choke are taken into accounts.

该文建立基于斩波电路的IGCT关断暂态特性的数学模型。该模型充分考虑IGCT阻容吸收回路、线路杂散电感及限流电抗器对IGCT关断暂态过电压的影响。

As the impregnant, the insulating oil is provided with the following features, such as excellent dielectric performance, stable chemical performance, non-chlorine or chlorinated biphenyl, complete biodegradation, non-pollution, low condensation point, low viscosity, excellent performance under low temperature and absorption capacity for the gas which is produced by partial discharge, high fire point, excellent capability of over-voltage withstanding.

作为浸渍剂的绝缘油具有优良的介电性能，化学性能稳定，不含氯或氯化联苯，能完全生物降解，对环境无污染，凝点低，黏度小，低温性能好，对局部放电产生的气体有很好的吸收能力，燃点高，具有出色的耐受过电压能力。

Our discussion models depend on a class of nonlinear control model.

本文讨论的模型是电力系统中出现的非线性过电压控制模型。

Finally, the impact of series resonant current limiter on relay protection and over voltage in grid was explored.

最后探讨了串联谐振式限流器对继电保护和电网过电压的影响。

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。

Now there are many sets in electric power system which adopt high-performance zinc oxide resistance for rotor demagnetization and over-voltage protection,and have good practical effects.

目前，系统内已有许多机组采用高性能氧化锌电阻作为转子灭磁电阻和过电压保护，具有良好的实用效果。

Users may also need to set power factor, the minimum value of over-voltage parameters.

同时用户可根据需要设定功率因数上、下限，过电压值等参数。

The over-voltage can also be caused by many ignitions of the electric arch of switch farad.

在其过渡状态过程中，系统内部电源能量产生振荡，互相转换和重新分布，都可能在某些设备上或系统中出现过电压。

In addition, equivalent series reactance of excitation transformer worsens the condition of the thyristor operation, and it can bring transient over-voltage at the moment of switching thyristor. The transient over-voltage will endanger the field winding.

励磁变压器的串联电抗恶化了晶闸管的换相工作条件，并在晶闸管元件导通与关断瞬间引起危及到转子励磁绕组安全运行的过电压。

The input filter capacitor and clamp capacitor for over-voltage protection of the MC are its energy storage elements.

输入滤波电容和过电压钳位电容就是MC的贮能元件。

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。