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本次毕业设计是220KV变电站电气一次部分初步设计。此设计任务旨在体现我对本专业各科知识的掌握程度，培养我对本专业各科知识进行综合运用的能力设计（一次部分）的全过程。通过对变电站的主接线设计，站用电接线设计，短路电流计算，电气设备动、热稳定校验，主要电气设备型号及参数的确定，运行方式分析，防雷及过电压保护装置的设计和无功补偿方案设计，较为详细地完成了电力系统中变电站设计。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：变电站；负荷计算；短路电流；设备选择
This graduation design is a part of 220KV substation electrical preliminary design. The purpose of this design task is to reflect my mastery of the knowledge of the major and to develop the whole process of designing my ability to use the knowledge of the major in a comprehensive way (one part). Through the main connection design of substation, station connection design, short circuit current calculation, electrical equipment dynamic, thermal stability check, main electrical equipment type and parameter determination, operation mode analysis. The design of lightning protection and over-voltage protection device and reactive power compensation scheme are completed in detail.
As the hub of electric energy transmission and control substation must change the traditional design and control mode in order to adapt to the development trend of modern power system modern industrial production and social life. This design discusses the design of the electrical part of 220kV substation (primary system). Firstly, according to the original data, the main transformer is selected by load calculation, then the main wiring design is carried out, and then the short circuit calculation is carried out. Conductor and electrical equipment selection, finally, lightning grounding design.
Key words: substation; load calculation; short circuit current; equipment selection
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