内蒙古工业大学电气自动化技术专业毕业论文

本科毕业论文

题 目：工厂供配电发展研究

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内蒙古工业大学电气自动化技术专业毕业论文

摘要

本文对象为一机械厂，有大量的高低压供电设备。本文通过分析负荷及

增容的具体情况，选出新配电室的具体位置，明确负荷等级，调整母线所接负荷，确定系统运行方案及配电柜参数，运用负荷计算、短路电流计算和动热稳定校验计算，选择并校验符合条件的电气设备，设计出二次回路，使变电所一次设备的控制、调节、继电保护和自动装置、测量和信号回路以及操作电源系统能有效的运行。在优化系统的过程中，尽量提高电能的利用率和使用效率，采取多种方式降低线损，从而节约能源节约资金，努力降低改造成本。在对供配电系统进行设计的基础上，根据变配电站实现综合自动化的现状，从设计原则、系统配置及结构、功能、技术指标等方面着手，对本厂变配电室综合自动化系统进行了可行性分析，设计出了符合本厂情况的综合自动化系统。最后，还进行了综合自动化系统的软件设计，使变配电室智能化水平得到了极大地提升。

关键词:负荷计算；二次回路；综合自动化；智能化

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内蒙古工业大学电气自动化技术专业毕业论文

Abstract

The study object of the paper is about a large fertilizer factory where a lot of high and low voltage supply devices are. According to analyze the concrete situation about the possessed load and the increased capacity, it is to choose the location of the new switch room, definitude the load grade, adjust the load together with generatrix, confirm the system running plan and the parameters of electrical power distribution cabinet. Choosing and testing the electrical devices matched condition, researching and designing the second loop by calculation of load, short circuit current and peak/short-time withstand current test. They can guarantee the effective running for the loop of the controlling, adjusting, relay protection and automation equipment, measurement and signal and the operated supply power. On the course of system optimizing, to save energy, fund and the improving cost, it should raise the utilization and the usage efficiency of electric power as far as possible .At last, it studied the system structure of the automation system and combined ourselves to discuss the foundation of intelligent transformation and distribution station as the basis of realization for the system improvement. On the base of designing the power supply and distribution system，with the state of realising automatization for power supply and distribution room ,we progress feasibility analysis from design principle, system configure and construction, function and technique index. At last, the soft design is also progressed. and to upgrade the power supply and distribution room's intelligence level with the design of the automatization systemKeywords: intelligence； load calculation,；second loop,；integrated automatization

目录

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内蒙古工业大学电气自动化技术专业毕业论文

摘要 ...................................................................................................................................... I Abstract ........................................................................................................................ III 1绪论 ................................................................................................................................. 1

1.1课题背景 .............................................................................................................. 1 1.2研究设计的主要内容 ....................................................................................... 3

2工厂用电负荷计算 ................................................................................................. 4

2.1负荷计算的定义 ................................................................................................ 4 2.2负荷计算的方法 ................................................................................................ 4 2.3负荷统计计算 .................................................................................................... 6

3工厂供配电系统设计 ............................................................................................ 7

3.1高压供电线路设计 ........................................................................................... 7 3.2无功补偿 ............................................................................................................ 14 3.3高压侧短路电流，短路容量的确定 .......................................................... 15 3.4设备的选择与校验 ......................................................................................... 19 3.5工厂供配电二次回路的设计 ....................................................................... 30 3.6节能措施 ............................................................................................................ 34

4工厂变配电室综合自动化设计 .................................................................... 37

4.1变配电室综合自动化的可行性分析 .......................................................... 37 4.2综合自动化系统设计方案 ............................................................................ 39 4.3提高变配电室综合自动化系统可靠性的措施 ....................................... 44 4.4工厂变配电综合自动化系统功能 .............................................................. 45 4.5变电站综合自动化系统的软件可靠性研究 ............................................ 45

5结论 ............................................................................................................................... 49 参考文献 ........................................................................................................................ 50

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