闪络

This finding gives a good explanation to some experiment results which were not understood previously, such as"additional temperature effects"meaning that the flashover voltages after air density correction still increase with the decrease of temperature, and the increment of AC flashover voltage over an insulating surface caused by increase of unit absolute humidity is abnormally high, etc.

根据这一发现，可以很好地解释以往无法解释的一些试验结果，如所谓"温度的附加影响"，即同一绝对湿度对应的工频闪络电压，经过空气密度校正之后，仍随环境温度下降而明显增加。

ABSTRACT In this thesis, the surface electrical field distribution of polluted post insulators at various stages of flashover is calculated imitatively and measured practically.

本文通过对染污支柱绝缘子闪络过程各阶段电场分布的大量仿真计算和实测，着重从"场"的角度研究了绝缘子污闪过程和污闪机理。

For direct flash, if the point of failure flashover discharge and equipment will be displayed on the screen straight flash wave, or they will no waveform display.

对于直闪法，若故障点闪络放电，仪器屏幕上就会显示直闪波形，否则将无任何波形显示。

It was concluded that charge injection and recombination would restrict the field electron emission, and increase the threshold voltage of flashover and decrease its scattering.

发生在绝缘体表层的电荷注入和复合过程能够在一定程度上抑制场致电子发射，从而提高沿面闪络电压，并降低闪络电压值的分散性。

According to the statistic of the wave of flashover voltage, it was found that the flashover voltage of iced composite insulator hasnt evident effects on its polarity.

通过对闪络过程中电压波形的分析，得到覆冰合成绝缘子闪络没有明显的极性效应。

Then, based on the "U" distribution of the flashover voltage values of composite insulators with the increase of the temperature cycle in the cold fog, the flashover performance evaluation method is brought forward.

根据冷雾中随着温度循环次数的增加试样的闪络电压呈&U&形分布的特征，提出冷雾中复合绝缘子污闪特性的评价方法。

The higher is the trap density in the material, the higher is the surface charge density, and the lower is the flashover voltage on alumina surface.

研究发现，氧化铝陶瓷的陷阱分布与其真空中的表面带电和沿面闪络特性之间存在一定的内在联系，即材料中的陷阱密度越大，其表面电荷密度越高，且沿面闪络电压越低。

Based on the test results, the AC flashover voltage, the voltage gradient and the valid coefficient of creepage distance of the five types of insulators are analyzed and calculated.

根据试验结果分析和计算了五种典型绝缘子的闪络电压、闪络电压梯度、有效爬电系数。

Then the author respectively introduces the structure of the switch,dielectric,status quo of research,insulation,electrode materials and mechanism of laser-triggered surface flashover switch developed in recent years.

介绍了沿面闪络开关的结构、研究现状、绝缘介质和电极材料，并介绍了近年来出现的激光沿面闪络开关的可能机理。

In the wind environment with and without dust, the flashover voltage of flat plate model, Uf, increases with the increment of the wind. This increase trend becomes slow when the wind increase to be 4.5m/s. Also, the influence of the charge of sand dust on Uf is small. In the condition of sand dust deposited on flat plate model, there is a minimum value of Uf with the increase of the density of the deposited sand dust. Besides, the flashover voltage of the dust is influenced by the moisture of the dust.

得到了风沙速度、风沙带电量、沙粒沉积量及沙粒含水量等因素对沿面放电的影响规律；在有风有沙和有风无沙时，平板模型沿面闪络电压Uf随风速的增大而增大，当风速达到4.5 m/s后增大趋势变缓；Uf受沙尘的电荷量影响较小；当干沙粒沉积在绝缘表面时，随着沉积密度的增加，Uf存在着极小值；同时，平板模型的闪络电压还与沉积沙粒的含水量有关。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。