220KV降压变电所电气一次部分设计中英文摘要.doc

xx学校毕业设计/论文目 录摘要. .绪论.1第1章 概述.31.1概述分析.31.2变电站的作用和主要设备组成.31.3变电站的种类.4第2章 电力系统及变电站总体分析.62.1电力系统的分析.62.2负荷分析.6第3章 主变压器的选择.83.1主变压器的选择依据.83.2变电所主变压器形式与容量的确定.93.3主变选择计算.11第4章 电气主接线设计.124.1电气主接线的设计原则.124.2电气主接线选择标准.124.3主接线的方式选择.124.4主变中性点接线的方式设计.144.5无功补偿.15第5章 短路电流计算.165.1短路电流计算的目的与规定.165.2短路电流的计算方法165.3短路电流的计算的结果.16第6章 电气设备.176.1 电气设备的选择. .176.2 选择导体和电器的基本条件.176.3 导体和电器的选取及校验. .186.4 设备选择结果显示.20第7章防雷保护.227.1 防雷保护分析.227.2 保护设置.237.3 防雷计算.23结论 . .25致谢.26参考文献.27附录一.28附录二.34摘 要随着人们生活水平的提高，会对电力技术提出更高的要求。我国电力工业的发展至今已有百余年的历史。但为满足人们对电力需求量的增长，电力工业仍处于高速发展中，这就促使电力技术和电力工业进一步向高电压、大机组、大电网的方向发展。由于大电网的出现，为了解决同步发电机之间并列的运行的稳定性问题，又重新采用了直流输电、远距离和大容量输电。由于我国特殊的地势形态以及能源成区域性分部，电力联网是很不必要的。目前，我国已形成东北、华北、华东、华中、西北和西南联营等跨省（区）的联合电力系统。正在建设的三峡水电站，可促使全国电力系统的形成。为了能更好地合理开发一次能源，减少电力系统的总装机容量，提高供电的可靠性及电能质量，进而形成强大的联合电力系统，更好地为工农业和人民生活服务，就需要建设各种枢纽变电站和区域性供配电站。本次设计的220KV变电站，就是属于这种性质的变电站。该站的建成，可以满足市区生产及生活的供电要求，在设计过程中考虑到该市工业生产和人民生活的发展，并可满足5-10年的远景供电需求。作为新建站，除了能够满足用电的需求的基本条件外，还必须考虑到自身的建站经济性、调度的灵活性和可靠性，并易于扩建和升级改进成微机综合自动化。关于此课程，目前国内外较先进的是变电站综合自动化。其一般为无人值班，有量元件和保护元件接各自独立的CT，全部四遥量送至调度中心，站内通信采用大量通信网等。变电站综合自动化的发展将是以后变电站发展的主导方向，它不但节省了人力、物力、财力，而且从更大程度上可以保证供电质量，提高供电的可靠性。人职守，四遥设计，采用综合自动化实现控制、保护、测量和远动等功能。微机控制，通过“远方”“就地”转换开关实现就地（就地单元控制）、远方（站内控制室微机及调度中心）两种控制方式，用微机实现模拟操作，待确认后再执行控制命令。关键词： 断路器， 隔离开关， 主接线， 电流互感器，母线，防雷ABSTRACTThe abstract along with the people living standard enhancement, can set a higher request to the electric power technology. Our country electric power industry development had hundred remaining years of life histories until now. But for satisfied the people to the electric power demand growth, the electric power industry still is in the high speed development, this urged the electric power technology and the electric power industry further to the high voltage, the big unit, the big electrical network direction develops. As a result of big electrical network appearance, in order to solve between the synchronous generator the compound movement stability problem, has used the direct current transmission, the long-distance range and the large capacity electric transmission. Because our country special topography shape as well as the energy become the regional branch, the electric power networking is very nonessential. At present, our country has formed northeast, North China, East China, Central China, northwest and southwest the joint management and so on cross province (area) union electrical power system. Is constructing the Three Gorges hydroelectric power station, may urge the nation electrical power system the formation. In order to can reasonably develop one time well the energy, reduces the electrical power system the total installed capacity, enhances the power supply the reliability and the electrical energy quality, then forms the formidable union electrical power system, well serves for the industry and agriculture and the lives of the people, needs to construct each kind of key position transformer substation and the regional characteristic supplies the power distribution station. This design 220KV transformer substation, belongs to this nature transformer substation. This station completion, may satisfy the urban district production and the life power supply request, considered in the design process this city industrial production and the lives of the people development, and may satisfy 5-10 the prospect power supply demand. As the new station construction, besides the demand basic condition which can use electricity satisfiedly, but also must consider own station construction efficiency, dispatchers flexibility and the reliability, and easy to expand and the promotion improve the microcomputer synthesis automation. About this curriculum, at present domestic and foreign advanced is the transformer substation synthesis automation. It generally for nobody duty, has the quantity part and the protection part meets respectively independent CT, completely four remote quantities deliver to the control center, in the station correspond use the massive communications networks and so on. The transformer substation synthesis automation development will be the later transformer substation development leading direction, not only it has saved the manpower, the physical resource, the financial resource, moreover from a greater degree may guarantee the power supply quality, enhances the power supply the reliability. The human duty, four remote designs, use the synthesis automation realization control, the protection, the survey and move and so on the functions far. In the microcomputer control, passes “the distant place” “” the change-over switch realization (unit control), the distant place (stands control room microcomputer and control