南京某化工厂35kv总降压变电所二次部分1.doc

南京某化工厂35kV总降压变电所（二次部分1） 摘 要 在本毕业设计中,主要做了关于35kV变电站的继电保护。查阅资料，严格按照任务书的要求，围绕所要设计的主接线图的可靠性，灵活性，经济性进行研究，对35kV线路的继电保护方式进行保护装置及整定计算，短路电流计算，变压器保护及对自动重合闸的选择等等。 本次设计中部分包括了计算变电所的最大负荷容量，计算主变压器的容量，化简短路阻抗和计算短路电流，电气设备的校验，无功补偿的计算和防雷保护保护范围的计算。在设计中每一步都依据变电所设计的有关技术规程、规定、手册，并应用有关图表、公式进行相关计算，使用了CAD等软件代替了手工作图，节省了设计时间并使整个设计显得更加规范、美观。本设计无论是设计内容，还是设计格式，都具有一定的借鉴、参考价值。 关键词：电力系统 变电站 继电保护 整定计算 Abstract In this graduation project, I mainly do a relay on the 35kV substation, access to information, in strict accordance with the requirements of the mission statement, around the design of the main wiring diagram, reliability, flexibility, economy to do the research, the 35kV line protection manner to protect the device include setting calculation, short circuit current calculation, transformer protection and automatic reclosing choice and so on. The design section includes the calculation of the maximum load capacity of the substation, to calculate the main transformer capacity of the impedance of the short road and to calculate the short-circuit current, electrical equipment calibration, the calculation of reactive power compensation and the calculation of the lightning protection scope of protection . Every step in the design in accordance with the relevant technical rules of the substation design, regulations, manuals, and apply the chart, formula calculation, the use of CAD and other software instead of the hands of working drawings, saving design time and make the entire design is more standardized, and beautiful. This design is the design content or design format, has a reference, the reference value. Keywords: Power system Transformer Relay Setting calculation 目 录 TOC \o 1-3 \h \u HYPERLINK \l _Toc29613 摘 要 PAGEREF _Toc29613 I HYPERLINK \l _Toc981 Abstract PAGEREF _Toc981 II HYPERLINK \l _Toc23575 1 设计概述 PAGEREF _Toc23575 1 HYPERLINK \l _Toc3794 1.1 设计原始资料 PAGEREF _Toc3794 1 HYPERLINK \l _Toc776 1.2 设计内容 PAGEREF _Toc776 1 HYPERLINK \l _Toc1121 2 负荷计算 PAGEREF _Toc1121 3 HY