电气工程及自动化毕业论文--变配电系统

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1、摘 要 一间冶金工业厂如果对变配电系统进行一个完善的规划，能很好地节约资金、合理规 划用地、降低电能损耗、提高电压质量、保证系统的正常运行。本论文对变配电进行全面 的设计，内容分四大部分。 第一部分先从论文的背景和目的进行阐述，然后对原始资料来进行初步的分析，再确 定好本论文的设计步骤。第二部分确定好冶金工业厂各部分的负荷，进行精确的计算，通 过无功补偿来提高系统的功率因数减少电能的损耗。根据负荷的重要性和负荷的大小进行 初步的变压器选择和合理的主接线、供电线路的设计。第三部分主要是确保系统的安全， 首先对系统进行精确的短路计算，然后根据所得到的短路电流和冲击电流进行一系列的高 低压设备的选择

2、与校验，保证系统的正常运行。第四部分根据设计的要求，最后进行防雷 保护措施的选择和接地装置的设计，增加系统的安全性。 在论文的最后还附上设计的图纸和计算过程。 关键词：负荷计算、主接线设计、短路计算、配电装置 Abstract A Metallurgical Machinery factory if the transmission and distribution system have a sound planning, savings can be good, reasonable land use planning, reducing power loss, upgrade quali

3、ty and ensure the normal operation of systems. In this paper, transmission and distribution of a comprehensive design, content is divided into four parts. The first part discussed the background and purpose, then the raw data to conduct a preliminary analysis, to determine a good step in the design

4、of this thesis. The second part of the metallurgical have plant to identify good part of the load, an accurate calculation, through the reactive power compensation system to improve the power factor to reduce the power loss. According to load the importance and the size of a reasonable load the main

5、 cables, power supply lines and preliminary design of the transformer choice. The third part is to ensure that the safety system, first of all, the system accurate short-circuit, and then be the basis of the current short-circuit current and impact of a series of high and low voltage equipment selec

6、tion and validation to ensure the normal operation of systems. The fourth part of the design in accordance with the requirements of lightning protection measures for the final selection and ground equipment design, increased system security. In the final papers also include the design drawings and calculation process. Key words：Load calculation、Main wiring design、Short-circuit calculation 、Distribution Device 目 录 1 绪 论 1 1.1 论文背景及目的. 1 1.2 论文研究方法 1 1.3 供电设计的主要内容 . 1 2 负荷计算与无功功率补偿 2 2.1 负荷计算