摘  要

我国经济的发展和人民生活水平的提高,人们对用电要求也越来越高,使变电站设计显得十分重要。设计符合城市发展和社会建设需要的变电站,才能使变电站满足人民的生活需要,使社会生产力得到持续的发展力,为企业的发展带来更大的社会效益与经济效益。

本次设计首先根据任务要求,结合系统,线路以及所有负荷参数,分析系统负荷的范围及发展趋势.通过对拟建110KV变电站的总体概述和出线考虑,对负荷状况的分析研究,并且基于安全,可靠,灵活,经济的基本要求,确定出110KV,35KV,10KV电气主接线,然后根据负荷计算和供电范围确定合适的主变压器台数,容量和型号.最后,根据最大持续工作电流及三相短路电流的分析计算,对高压断路器,隔离开关和电压,电流互感器等主要电气设备做出选择,这基本完成了110KV变电站主电路图部分的设计.最后进行变电站防雷保护的设计。

关键词：邛崃市；变电站；110Kv；主接线；短路计算

Abstract

With the development of our economy and the improvement of people’s living standard, people’s demand for electricity is becoming higher and higher, which makes substation design very important. In order to meet the needs of urban development and social construction, the substation can be designed to meet the needs of people’s life, make social productive forces get sustainable development power, and bring greater social and economic benefits to the development of enterprises.

This design first according to the task requirements, combined with the system, lines and all load parameters, analysis of the system load range and development trend. Through the overall overview of the proposed 110 KV substation and the consideration of the outgoing line, the analysis and study of the load condition, and based on the basic requirements of safety, reliability, flexibility and economy, determine the 110 KV,35KV,10KV of electrical main wiring, and then determine the appropriate number of main transformers, capacity and model according to the load calculation and power supply range. Finally, according to the analysis and calculation of the maximum continuous working current and three-phase short circuit current, the high voltage circuit breaker, the disconnector and the voltage and current are mutually.  sensor and other main electrical equipment to make a choice, which basically completed 110 KV substation main circuit diagram part of the design. Finally, the design of lightning protection for substation is carried out.

Keywords: Qionglai city; substation ;110 Kv; main wiring; short circuit calculation