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1、 摘要 本毕业设计论文题目为金州 220/60kV 降压变电所电气部分初步设计，要求所设计的变电所能够保证供电的可靠性、灵活性和一次性满足远期负荷的要求，本设计将按照远期的负荷规划进行设计。在设计过程中将遵循国家的法律、法规，贯彻执行国家经济建设的方针、政策和基本建设程序，运用系统工程的方法从全局出发，正确处理生产与生活、安全与经济等方面的关系，实行资源的综合利用，节约资源和用地，对生产工艺、主要设备和主体工程要做到可靠、适用、先进。在上述原则基础上，明确设计的目的，逐步完成主变的选择、电气主接线的拟定、短路电流的计算、电气设备选择、高压配电装置的规划、继电保护装置的规划设计、防雷保护规划、绘
2、制图纸等主要工作，形成较为完整的论文。随着经济的飞速发展，电力这种洁净的二次能源将对未来的发展起着举足轻重的作用。为了促进电力工作的持续稳定发展，保证西电东送工程的成功建设，满足个地区供电负荷要求，实现安全供电，保证供电可靠性，变电所的合理设计就变得尤为重要。设计工作是工程建设的关键环节。做好设计工作，对工程建设的工期、质量、投资费用和建成投产的运行安全可靠性和生产的综合经济效益，起着决定性的作用。本论文即在遵循原理、合理规划、反复校验的基础上完成。关键词：三个以上AbstractThe graduation design topic for preliminary design of Jin
3、zhou 220/60kV step-down substation electrical part, the design can guarantee the power supply reliability, flexibility and one-time meet long-term load requirements, the design will be designed in accordance with the long-term load planning. In the design process. According to the state laws and reg
4、ulations, implement the program guidelines, policies and the basic construction of national economic construction, from the overall situation by using system engineering method, correctly handle the relationship between the production and the life, safety and economic aspects, the comprehensive util
5、ization of resources, saving resources and land, the production process the main equipment, and main works to achieve reliable, advanced, applicable. Based on the above principle, the design goal, gradually complete the main variable selection, the formulation of the main electrical wiring, short-ci
6、rcuit current calculation, electrical equipment choice, high voltage power distribution equipment planning, relay protection, lightning protection planning, planning and design drawings and other major work, has formed a complete paper. With the rapid development of economy, the clean energy power t
7、wo times in the future will play a decisive role in the development. In order to promote the power of sustained and stable development, ensure the successful construction of West to East power transmission project, to meet the requirements of the power supply to the load area, realize safe power sup
8、ply, ensure the reliability of power supply, becomes substation reasonable design is particularly important. Design is a key link in the construction. Do the design work, the project construction period, quality, cost and the completion of the operation safety and reliability and production of compr
9、ehensive economic benefits, play a decisive role. The completion of this thesis is to follow the principle, reasonable planning, repeatedly check.目录引言.1第一章变电所主变压器的选择.21.1 主变压器台数和容量选择的相关规定.21.1.1 主变压器台数的确定.21.1.2 主变压器容量的选择.21.1.3 变压器的选择.21.2 变压器的负荷计算.3第二章 变电所电气主接线的选择.42.1 电气主接线的设计原则和要求.42.1.1 电气主接线的设计原则.42.1.2 电气主接线方式的基本要求.52.1.3 主接线的拟定方案及选择.72.1.4 变电所电气主接线图.9第三章短路电流的计算.103.1 短路电流计算的目的、规定.103.2 各元件的阻抗标么值.113.3 短路电流计算.14第四章主要电气设备的选择.154.1 电气设备的选择原则.154.2 电气设备的选择.174.2.1 断路器的选择.174.2.2 隔离开关的选择.194.2.3 电压互感器选择.214.2.4 电流互感器的选择.214.2.5 避雷器的选择.23第五章变电所高压配电装置的规划设计.
