SFSZ10-31500／110电力变压器的电磁方案计算及减小局部放电措施的研究(优秀毕业设计)

SFSZ10-31500/110电力变压器的电磁方案计算及减小局部放电措施的研究

摘要

本文完成了SFSZ10-31500/110电力变压器电磁方案的计算，文中较为详细地阐述了电力变压器计算的基本公式和计算方法。SFSZ10-31500/110电力变压器电磁方案计算，主要包括变压器铁心的选择及几何尺寸计算、变压器线圈材料、型式选择、高度确定、电压电流计算及线圈几何尺寸计算、短路阻抗计算、线圈损耗、引线损耗、杂散损耗、负载损耗计算、变压器温升计算、短路电动力计算、变压器重量（总油量、器身重量、油箱重量、附件重量、运输重量计算）等，并进行了绝缘校核，得出SFSZ10-31500/110电力变压器的电磁计算方案。

本文同时对高电压变压器局部放电产生的原因进行了分析综述，在查阅文献的基础上，对减小变压器的局部放电在设计、制造、装配等方面提出了一些改进措施。

关键词电力变压器；电磁计算；局部放电

SFSZ10-31500/110 power transformer

electromagnetism project calculation

Abstract

This text introduced the SFSZ10-31500/110 power transformer calculating and basic knowledge in project in electromagnetism primarily, than clarified the calculating and basic formula in transformer in power detailed with compute the method. Among them included choice and calculations of the transformer core, transformer coil material, pattern choice, high certain, the voltage and current computes and the coil computes, the short-circuit resistance computes, the coil exhausts, the fuse exhausts, miscellaneous spread to exhaust, load to exhaust the calculation, the transformer temperature rises the calculation, short circuit electricity the motive computes, total oil in transformer measure, total weight, conveyance the weight computes, the transformer insulates the school checkup. Synthesize the design calculation process that introduced the SFSZ10-31500/110 power transformer.

Because it is main reason partial discharge that next emergence trouble in normal work in power transformer electric voltage with stop to carry. Though at affect the degree top, actually is partial discharge the size of the deal、Frequency number of times, take place still the part which influence is big still needs the research inquiries into, but reduce it is target that everybody pursue together that partial discharge. The for this reason a text returned to turn on electricity the proceeding the research to the part of the transformer, explaining the principle that partial discharge and affecting the factor that partial discharge, the reasons which caused the partial discharge in 110kV and above extra large power transformer are analysis From the respect of design and technology, the measures for decreasing the partial discharge are expounded.

Keywords Power transformer ；Electromagnetism calculation ；Partial discharge

目录

摘要...................................................................................................................... I Abstract ............................................................................................................... II

第1章绪论 (1)

1.1 课题背景 (1)

1.2 论文研究的内容 (1)

第2章电力变压器电磁计算方案 (2)

本设计的技术条件 (2)

2.1 额定电压﹑电流计算 (2)

2.1.1 线圈相电压 (2)

2.1.2 线圈电流 (3)

2.2 铁芯的确定 (5)

2.3 线圈匝数计算 (5)

2.4 电压比校核 (6)

2.5 线段排列及计算 (7)

2.6 线圈绝缘半径及导线长度计算 (11)

2.7 短路阻抗计算 (12)

2.8 负载损耗计算 (14)

2.9 温升计算 (16)

2.10 空载特性计算 (19)

2.11 短路电动力计算 (20)

2.12 变压器重量计算 (27)

2.13 绝缘校核 (30)

第3章局部放电的减小措施 (32)

3.1 局部放电机理 (32)

3.2 减小局部放电的措施 (36)

结论 (43)

致谢 (44)

参考文献 (45)