封闭母线自然冷却的温度场分析【电子类】【2张图纸】【优秀】

封闭母线自然冷却的温度场分析54页 22000字数+说明书+2张CAD图纸【详情如下】IPB断面布置图.dwg内封.doc发电机变压器组主接线图.dwg封闭母线自然冷却的温度场分析说明书.doc摘要.doc目录.doc秦山核电母线温度场分析程序.cpp秦山核电温度场分析数据-20.txt秦山核电温度场分析数据.txt目录前言11 母线及其分类31.1 母线结构的演变和大电流母线的技术特点31.1.1 母线的结构31.1.2 大电流母线的技术特点41.2 母线的类型和应用41.2.1 敞露母线41.2.2 离相封闭母线52 母线的传热原理72.1 对流换热概说82.1.1 自然对流和强制对流82.1.2 层流与紊流82.2 自然对流换热92.2.1 自然对流换热的机理92.2.2 大空间自然对流换热92.3 热辐射及辐射换热102.3.1 热辐射的基本概念102.4 太阳辐射113 封闭母线冷却方式的选择和防结露措施123.1 冷却方式的选择133.2 封闭母线防结露方案的确定153.2.1 采取防结露措施的必要性153.2.2 封闭母线的几种防结露措施及特点163.2.3 空调冷气微正压系统的结构及工作原理173.2.4 结论184封闭母线的热平衡计算194.1 母线导体损耗计算194.2 外壳损耗计算204.3 散热计算214.4 解热平衡方程255 温度场分析275.1研究目的275.2利用网格法对封闭母线的温度场进行分析275.3外壳散热的分析285.4导体温度的计算335.5 程序及其计算结果345.6 结果及分析376 技术经济分析397 结论41致谢42摘要母线是发电厂和变电所电能输送设备的重要组成部分, 主要用于联结大容量发电机的主出线和主变的低压侧，传递几千安培的大电流。如果母线发生故障,将造成发电厂和变电所停电,从而对电力系统的安全运行带来严重危害,因此,对母线可靠性的设计提出了很高的要求。本文主要介绍了母线的结构特征及分类，母线的温度场分析，并在此基础上选择了母线的冷却方式及防冷凝方案。我国在高垂直段母线方面的技术还比较落后，但对很多情况下需要设计研究高垂直布置母线。本文对秦山核电站的母线作了75米垂直布置分析研究。主要利用传热学原理对其温度场进行了分析，并用VC+语言对其进行了编程计算，得出了垂直布置母线的温度分布规律。依据该规律工程技术人员可以设计出经济可靠的母线系统，保证母线在允许的温度范围内工作。关键词：离相封闭母线；垂直安装；温度场分析AbstractBus bar is the importance part of power station and electric changing station,used for primarily the lord of the big capacity generator out export and the low-pressure side of electric transformer, delivering several thousand electric current. The power will be cut off if the occurrence breaks down, that brings the serious bane to the safe movementing of the electric power system. Therefore, it is very high request to the dependablly designing of bus bar.The construction and classifications of bus was described in the text. Analysising and investigating the temperature of bus bars is the main part of the text. How to choose cool way to enclose bus and defending congealed also was introduced. Our countrys study on vertical enclosed bus bars is laggard, but it is large needing of high vertical enclosed bus bars. The height of the Qinshan nuclear stations vertical enclosed bus bars is one seventy-five meters. The text analysis and investigate the temperature of vertical bus bars, and calculation the value by VC+. The analysis of temperature is help for engineers and workers. According to the regulation，engineers can design a more economy and dependable bus system, also, the workers at spot can check the system in the allow scope temperature.Key words: enclosed bus of separated phase; vertical installation; analysis and investigate the temperature of bus bars