The influence of copper foil surface quality on electrical performance of power transformer is analyzed, the key technology for monitoring the surface flaw with machine vision system is studied.

分析铜箔表面质量缺陷对电力变压器电气性能的影响，研究采用机器视觉系统对铜箔表面质量缺陷监视的关键技术。

The cooling method of nature oil circulation is not only widely used in small-middle type power transformer, but also used in large type power transformer with low load and low ambient temperature.

自然油循环的冷却方式不仅广泛应用于电力网中的中小型电力变压器，也会在在大型电力变压器低负荷和低环境温度时应用。

From social development and requirement, it is imperative to develop this new kind of dry power transformer.

社会的发展和需求表明，研制这种新型的干式电力变压器势在必行。

In order to improve the general performance of dry-type power transformer and to shorten new product development period, computing aided design should be further studied and applied.

为了进一步提高干式电力变压器的总体性能，缩短新产品的开发周期，有必要对其计算机辅助设计进行更深入的研究。

The coupling between coils in power transformer causes the complexity of external characteristics of internal short circuit faults.

电力变压器线圈之间的耦合特性使其内部短路故障的外部特性具有复杂性。