180万吨地面变电所设计本科毕业设计论文.doc

摘 要 本设计根据年产为180万吨煤矿的电力负荷的资料，做出了该矿的60kv总降压变电所的整体设计，包括负荷计算及无功补偿，系统主接线方案的选择，高压电气设备的选择，短路电流的计算对所选的高压电气设备的校验，继电保护的设计，防雷及接地的设计等，本设计以实际负荷为依据，以变电所最佳运行方式为基础，按照有关规定和规范，做出了满足该矿生产需求的设计。设计中先对负荷进行了统计和计算，选出了所需主变压器的型号，然后根据负荷性质及对供电可靠性要求拟定主接线设计，考虑到短路电流对系统的严重影响，设计中进行了短路电流计算。设计中还对主要的高压设备做出了选择和计算，如断路器，隔离开关，电压互感器，电流互感器等。此外还进行了继电保护以及防雷保护的设计与计算，提高了整个变电所的安全性。 关键词：60kv 变电所 负荷计算 主接线设计 短路电流计算 高压电气设备选择 继电保护 ABSTRACT This design according to the mine power load material make the attained general voltage 60kv substation design specification of the overall design including load calculation and reactive compcnsation,system of main wiring schemse choose ,high voltage electrical equipment choice.the calculation of short-circuit current and of selected high votage electrical equipment calibration relay protection design lightning protection and grounding design .etc.This design to the actula load as the basis the best operation way in substation based in accordance with the relevant regulations and atandard make a meet, the design of mine produetion requiremants. Design the firt to load to seleat the statistical and computational got the main transforner models,and then based on the load properties and worked on the power supply reliability require ments considering the Lord wiring design the serious influence of system short cicuit design the short circuit calculation .Design of high pressure of the main eletrical eqquipment selection and caculation such as breaker isolating suitch .voltage transformer current transformer ,etc.In addition also carried out the relay protetion and lightion protection design and calcutation improve the security of the whole substation . Keywords: 60kv substation ；Lord calculation;Lord wiring design ；short-cicuit current calculation;Electrical equipment selection ;Relay protection 目 录 摘 要 I ABSTRACT II 第1章 绪 论 1 1.1选题的意义 1 1.2国内外发展情况 1 1.3原始资料分析 3 1.3.1 设计题目及原始资料 3 1.3.2 本设计的指导思想 4 1.3.3 设计内容 4 第2章 负荷统计主变压器的选择 7 2.1 负荷来源 7 2.2负荷统计与负荷计算 7 2.3主变压器选择 12 2.3.1无功功率补