电力变压器

It is harmful to the characteristics of the transformers on line. It causes the increasing of magnetizing current, harmonics leakage magnetic flux, and thus the losses, which in turn results in the structures overheating and insulation ageing.

电力变压器的磁动势和磁通出现直流分量的现象称为"直流偏磁"，这一现象将对变压器的正常运行产生不利的影响，诸如励磁电流有效值、高次谐波成分及其相应损耗的增加，铁心高度饱和引起的漏磁通的增加，以及由此引发的局部过热、绝缘老化等问题。

In this paper,the wave process in a 500kV ultrahigh voltage power transformer winding is calculated and analyzed,the potential distribution and the gradient distribution in high and low voltage winding under the full wave and the truncation wave action are described.

对1台500 kV超高压电力变压器的绕组进行了波过程计算，分别计算了高、低压绕组在全波和截波作用下的电位分布和梯度分布，确定了梯度最大的油道，并计算了相应油道在全波和截波下的绝缘裕度，为变压器的绝缘设计提供了理论依据。

Analyzes and calculates the stress and torsional deflection of large transformers such as DEP-240 MVA/500 kV,SEP-720 MVA/500 kV,etc.influeced by axial current component of low voltage spiral windings.Gives the distribution rules of torsional stress of unit length and displacement following windings height.Provides the reference for optimization design of large transformer.

对DEP-240 MVA/500 kV、SEP-720 MVA/500 kV型大型电力变压器低压螺旋绕组在轴向电流分量作用下产生的应力及扭转变形问题进行了分析计算，给出了低压螺旋绕组单位长度扭转应力及位移沿绕组高度的分布规律，为大型变压器的优化设计提供了参考依据。

The tremendous electromagnetic stresses and thermal accumulation caused directly or indirectly by the short circuits will do harm to the transformer windings, such as wingding deformation.

运行于电网中的电力变压器，不可避免地将遭受各种短路故障的冲击，由于短路电流产生的巨大电动力和绕组的瞬间急剧发热，造成变压器绕组变形。

ABSTRACT: In this paper, a new three phase to four-phase transformer with four phase pillars structure is proposed, its electromagnetism prnciple is analysed, and properties and features of the transformer are also discussed further.

摘 要：首次提出了一种四相四芯柱结构的三相变四相电力变压器，分析了其电磁变换的基本原理，并进一步讨论了这种变压器的性能与特点。

In the wire workshop of the manufacturing industry of the large electrical transformer, it is a very important process that the wire joint to be welded must be the arc shape which is a technical requirement to secure the quality of the transformer.

在大型电力变压器制造业的线圈生产车间，一项很重要的工艺要求就是导线接头必须圆弧头焊接，是确保变压器质量的技术要求。

The latest developed 110 KV oil-immersed power transformers and 35 KV and below epoxy resin dry-type transformer and magnetic levitation linear oil extractor have the first-class technology in China.

最新研制出的具有独立知识产权的110千伏级油浸式电力变压器及35千伏级及以下环氧树脂干式变压器、磁悬浮式直线抽油机等产品技术水平居国内一流。

Dry-type power transformer is widely used in these days because of its good qualities, such as not flammable, hard to explode, small volume, little maintenance and easy to be placed into buildings near the load center. Many people have made considerable reaches on its average and hottest spot temperature rise.

干式电力变压器具有不燃、不爆、体积小、维护少、可深入负荷中心等优点，是近年来防灾型变压器中用量最大的一种，许多人对其平均温升和最热点温升进行了大量的研究。

The common point of the n-windings in a star-connected equipment such as a power transformer, or an earthing transformer.

星形连接的设备，例如电力变压器或接地变压器，n绕组的公共点。

The product is welcomed by the users in the power transformer profession and sells in distant markets countries such as India, Germany, Italy, Northern Island, Papua New Guinea, Belorussia, Iceland, Nigeria, West Africa, Southeast Asia, Mid-East and so on.

公司产品在电力变压器行业深受用户欢迎，并随变压器远销印度、德国、意大利、北爱尔兰、巴布亚新几内亚、白俄罗斯、冰岛、尼日利亚、西非、东南亚、中东等国家和地区。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。