| 电力变压器是电力系统中最重要的设备之一 |
| 添加时间：2017/5/24 17:25:03 浏览次数： |
| 电力变压器是电力系统中最重要的设备之一，是保证供电可靠性的基础。随着整个国民经济的高速发展，对变压器的需求量还将不断增加。然而随着电力变压器装机量的增加，其自身所消耗的能量也越来越大，这与我国提倡建设节能性社会是不相符合的，有必要采取相应的技术措施来减少变压器自身的损耗，因此研究如何降低变压器铁损的方法就变得非常有必要了。 Power transformer is one of the most important equipments in the power system, which is the basis for ensuring the reliability of power supply. With the rapid development of the entire national economy, the demand for transformer will continue to increase. With the increase of power transformer installed capacity, however, its own energy is becoming more and more big, and it is not our country advocates the construction of energy-saving society conform, it is necessary to take corresponding technical measures to reduce the wastage of the transformer itself, so the method of how to reduce the transformer losses has become very necessary. 电力变压器的损耗主要包含空载损耗与负载损耗两部分。变压器的空载损耗主要包括铁心材料的磁滞损耗、涡流损耗以及附加损耗几部分，又因为变压器的空载损耗属于励磁损耗，所以与负载无关。 The loss of power transformer mainly consists of the load loss and load loss. No-load loss of transformer is mainly including the hysteresis loss and eddy current loss of core material and additional loss a few parts, and since the no-load loss belongs to the field of transformer losses, so has nothing to do with the load. 1)磁滞损耗是铁磁材料在反复磁化过程中由于磁滞现象所产生的损耗。磁滞损耗的大小与磁滞回线的面积成正比。 1) hysteresis loss is the loss of ferromagnetic material in the process of repeated magnetization due to hysteresis. The magnitude of the hysteresis loss is proportional to the area of the hysteresis loop. 2)涡流损耗。由于铁心本身为金属导体，所以由于电磁感应现象所产生的电动势将在铁心内产生环流，即为涡流。由于铁心中有涡流流过，而铁心本身又存在电阻，故引起了涡流损耗。 3)附加铁损。附加铁损是不完全决定于变压器材料本身，而主要与变压器的结构及生产工艺等有关。通常引起附加铁损的原因主要有：磁通波形中有高次谐波分量，它们将引起附加涡流损耗；由于机械加工所引起的磁性能变坏所导致损耗增大；在铁心接缝以及芯柱与铁轭的T型区等部位所出现的局部损耗的增大等。 2) eddy current loss. Because the core itself is a metal conductor, the electromagnetism is generated by electromagnetic induction, which creates a circulation in the core, which is a vortex. Because of the vortex flow in the core, and the iron heart itself has resistance, it causes the eddy current loss. 3) additional iron loss. Additional iron loss is not fully determined by the transformer material itself, but mainly related to the structure and production process of the transformer. The cause of additional iron loss is usually caused by high subharmonic components in the flux waveform, which will cause additional eddy current losses. The increase in losses due to the deterioration of magnetism caused by mechanical processing; The increase of local losses in the joints of the core and the core and the t-shaped areas of the iron yoke. |
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