10kV电力变压器设计.docx

学校代码: 10128
学号: 201111202005


本科毕业设计说明书
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题目:10kV电力变压器的电磁计算与分析
学生姓名:朱磊
学院:电力学院
系别:电力系
专业:电气工程及其自动化
班级:电气11-2
指导教师:陈艳宁讲师
二〇一五年六月
摘要
电力变压器在电力系统中占有重要的地位,其发展趋势是安全可靠、节省生产资本、低损耗运行。因此,进行电力电压器的电磁计算与分析就显得非常重要。
本文早参考了大量文献的基础上,根据变压器设计的基本思路,按照一般压器设计的基本步骤,完成了一台1600kVA/10kV的电力变压器设计。本文章根据一般变压器设计方法针对给定的的电力变压器做了详细的设计。根据所设计变压器的技术参数选用合理的导线和铁心,使其能够安全可靠的运行。通过计算高、低压绕组匝数,对高、低压绕组进行了设计。计算出每匝电动势,进而计算获得低压绕组的匝数,通过变比可得到高压绕组的匝数。高低压绕组的设计包括设计绝缘结构,绕组材料,绕组结构阻抗与负载损耗计算等。计算空载特性是计算空载损耗和空载电流,进而判断所设计的变压器是否合理。计算短路特性是计算变压器的短路电压百分数、铜耗和短路阻抗,若短路阻抗太大则会产生很大的附加损耗,也会使变压器局部过热。变压器温升计算值不仅关系到变压器的安全性、可靠性、使用寿命,也关系到变压器的制造成本。所以本文对温升做了详细的计算。最后则对变压器的结构改进做了详细的介绍。
关键词:电力变压器;电磁计算;结构改进
Abstract
Power transformers plays an important role in the power system, and its development trend is safe and reliable, saving production capital, low-loss run, trying to improve the quality of the product. Therefore, it is very important to calculate and analyze the ic power voltage device.
This article reference to the vast literatures on the basis in early, according to the basic idea of ​​transformer design, in accordance with the basic steps of the general press is designed plete the design of a power transformer 1600kVA / 10kV . This design transformer design according to the general method for the design of power transformers made a detailed design. A reasonable choice of wire and an iron core transformer according to the design specifications to enable safe and reliable operation. High and low voltage windings are designed By calculating the high and low voltage winding turns. Calculating the quantity per turn, and then calculating the number of turns of the low voltage winding can be obtained through high voltage winding turns ratio. Design of high and low voltage winding insulation structure including design, winding material, winding structure impedance and load loss calculation. Computing load characteristic is to calculate load loss and no-load current, and then to determine the design of the transformer is