毕业论文 110kV电力变压器结构与电磁计算

变压器电磁计算的模范

110kV 电力变压器结构与电磁计算 电力变压器结构与电磁 结构与电磁计算 摘要电力变压器是电力系统中的一种重要设备，其发展趋势是提高可靠 性、节省材料、低损耗水平，明显缩短产品的设计周期、降低生产成本和 提高产品的质量，从而增强产品的市场竞争力，取得显著的社会经济效 益，因此电力变压器的电磁计算就显得尤为重要。 本文在参考大量文献的基础上，分析了我国电力变压器行业的现状 和发展趋势，阐述了电力变压器的基本原理和基本结构特征，根据电力变 压器设计的基本思路，按照目前变压器设计的一般方法，完成了一台 40000kVA/110kV 有载调压电力变压器的计算工作，主要内容包括阻抗电 压、空载、负载损耗、温升、短路电动力等的计算。电磁计算结果满足国 家标准和技术参数的要求。本文还针对电力变压器的空载损耗、负载损 耗、噪音、温升、局放、渗漏及抗短能力，介绍了如何改进变压器的结构 以降低空载损耗和负载损耗、噪音、局放及提高抗短路能力，并达到防渗 漏的效果。 关键词 电力变压器；电磁计算；结构改进

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变压器电磁计算的模范

The Structure and Electromagnetical Calculation of 110kV Power Transformer AbstractThe further development of power transformer, which is an important equipment in power system, is to improve the liability, save material and reduce loss, obviously shorten product design period, reduce the cost, improve product quality, strengthen the market competitiveness and gain distinct economic performance. Therefore, the electromagnetical calculation of power transformer is especially important. Based on the information and extensive literature, this article analyzes the present basic principle and basic structure of power transformer, and also, the present situation and the development of our country’s power transformer industry. According to the general designing method and the basic designing ideas of power transformer, a whole electromagnetic calculation of a 40000kVA/110kV OLTC power transformer has been completed in the article. The results of the electromagnetic calculation meet the requirements of national standards and technical parameters, including the main contents of impedance voltage, load and no-load loss, temperature rise, short-circuit electromagnetical force and so on. As development of Chinese transformer manufacture technology, the manufacture technique of 110kV domestic power transformer is being close to or reach to the advanced level of foreign transformer. This article introduces how to improve the structure of the transformer in order to reduce noload loss, load loss, noise, PD, the magnetic leakage and to improve the antishort-circuit capacity. Keywords power transformer; electromagnetic calculation; structure

improvement- II -

变压器电磁计算的模范

目录摘要 ...............................

....................................................................................... I Abstract ............................................................................................................... II 第 1 章 绪论 ........................................................................................................ 3 1.1 课题背景 ................................................................................................... 3 1.1.1 课题的国内外研究现状与趋势 ........................................................ 3 1.2 变压器的工作原理与结构 ....................................................................... 4 1.2.1 变压器的基本工作原理 .................................................................... 4 1.2.2 电力变压器基本结构 ........................................................................ 5 第 2 章 电力变压器电磁计算 ............................................................................ 8 2.1 技术条件： ............................................................................................... 8 2.2 额定电压和电流的计算 ........................................................................... 8 2.2.1 高、低压线圈额定电压计算 ............................................................ 8 2.2.2 高低压线圈电流计算 ........................................................................ 8 2.3 铁芯主要尺寸的确定 ............................................................................... 9 2.3.1 铁芯直径选择 .................................................................................... 9 2.3.2 铁芯截面积计算 ................................................................................ 9 2.4 线圈匝数计算 ......................................................................................... 10 2.4.1 初选每匝电压 .................................................................................. 10 2.4.2 低压线圈匝数确定 .......................................................................... 11 2.4.3 高压线圈匝数确定 .......................................................................... 11 2.4.4 电压比校核 ...................................................................................... 11 2.5 线圈几何尺寸的计算 ............................................................................. 13 2.5.1 导线选取 .......................................................................................... 13 2.5.2 线段排列 .......................................................................................... 14 2.5.3 线圈高度计算 .................................................................................. 15 2.5.4 线圈辐向宽度 .................................................................................. 15 2.5.5 绝缘半径及窗高 ...............................................................

............... 15 2.5.6 导线长度 .......................................................................................... 16 2.5.7 线圈直流电阻 .................................................................................. 17 2.5.8 导线重量计算 .................................................................................. 17 2.6 阻抗电压计算 ......................................................................................... 18 2.6.1 额定分接阻 …… 此处隐藏：14812字，全部文档内容请下载后查看。喜欢就下载吧 ……