【学士论文】毕业设计（论文）-220KV变电站主接线毕业设计.doc

摘要 展望未来，我国能否在本世纪中叶基本实现现代化，相当大的程度上取决于能源。电力工业是国民经济的基础，是重要的支柱产业，它与国家的兴衰和人民的安康有着密切的关系，随着经济的发展和现代工业的建设的迅速崛起，供电系统的设计越来越全面、系统，工厂用电量迅速增长，对电能质量、技术经济状况、供电的可靠性指标也日益提高，因此对供电设计也有了更高、更完善的要求。 变电站作为电能传输与控制的枢纽必须改变传统的设计和控制模式，才能适应现代电力系统、现代化工业生产和社会生活的发展趋势。本设计讨论的是220kV变电站电气部分设计（一次系统），首先根据原始资料进行分析，负荷计算选择主变压器，然后在此基础上进行主接线设计，再进行短路计算，导体和电气设备的选择，最后进行防雷接地设计。 关键词： ABSTRACT Looking ahead, our ability to achieve the middle of this century, modernization, to a large extent depends on energy. The power industry is the basis of the national economy is an important pillar industry, the rise and fall with the State and the people closely related to the well-being, along with economic development and the rapid development of modern industry rise, more and more power supply system design?comprehensive, systematic, rapid growth of plant consumption for power quality, technical and economic conditions, reliability of electricity supply are increasing, and therefore also have higher power supply design, better requirements. Substation as a hub for power transmission and control to change the traditional design and control mode, to adapt to the modern power system, modernization of industrial production and the development trend of social life.?The design discussion is part of 220KV electrical substation design (a system), First of all, analyze the original data and choose the main transformer, based on it , design the main wiring and Short Circuit Calculation, at last choose equipment, then mine and the protection of earth and distribution device. Keywords: substation; short-circuit current; equipment selection; distribution equipment 目录 摘要 I ABSTRACT II 1引言 1 2电气主接线的设计 2 2.1电气主接线的概述 2 2.2电气主接线的基本要求 2 2.3电气主接线设计的原则 2 2.4电气主接线的方案选择 3 2.4.1方案拟定 3 2.4.2方案比较 6 2.4.3方案确定 6 3负荷计算和主变压器的选择 7 3.1主变压器的选择原则 7 3.1.1主变压器台数的选择 7 3.1.2主变压器容量的选择 7 3.1.3主变压器型式和结构的选择 8 3.2负荷计算 9 3.3无功补偿 11 3.3.1功率因数定义 11 3.3.2功补偿容量计算 12 3.4主变压器选择结果 14 4站用电接线及设备用电源接线方案 15 4.1所用电源数量及容量 15 4.2所用电源引接方式 15 4.3所用变压器低压侧接线 16 4.4所站用电接线 16 4.5备