本科毕业设计-某冶金机械修造厂全厂总降压及配电系统设计.doc

摘 要 电能是当今工业生产的主要动力能源。随着工业电气自动化技术的迅速发展，工厂用电量的飞速增长，对电能的质量、供电可靠性以及经济技术指标等的要求也日益提高。供电设计是否完善可靠，不仅影响工厂的基本投资建设、运行费用以及有色金属消耗量，同时也反映了工厂供电可靠性和工厂的生产性，它与企业的经济效益，人身和设备安全等是密切相关的。 在文章里，我们认真仔细地对工厂所提供的原始资料进行分析。首先进行电力负荷运算，根据功率因数要求在低压母线侧进行无功补偿，进而对主变和各车间变压器进行选择。同时对架空线也进行了选择和校验。我们对35KV 和6KV母线处发生短路时的短路电流进行计算，得到最大运行方式和最小运行方式下相对应的短路电流。而且根据本厂对继电保护的要求，进行了继电保护装置的整定计算。 关键词：供电设计，电力负荷，短路电流，继电保护 ABSTRACT Electricity is the main power of todays industrial production. With the rapid development of industrial electrical automation technology, with the rapid growth of power plant, the power quality, supply reliability and economic technical index requirements are also increasing. The power supply design is perfect and reliable, not only affect the plants basic construction investment, operation cost and the consumption of non-ferrous metals, but also reflects the factory power supply reliability and factory production, and the economic efficiency of enterprises, people and equipment safety is closely related to each other. In the article, the original data we carefully provided to factory analysis. First, the power load calculation, according to the power factor requirements of reactive power compensation in the low-pressure side of the bus, then the main transformer and the workshop transformer selection. At the same time also on overhead line selection and validation. We calculate the short-circuit current of short circuit 35KV and 6KV bus when the maximum short-circuit current, operation mode and operation mode corresponding to the minimum. And according to the requirements of relay protection of the factory, the relay protection setting calculation device. Keywords: power supply design,Power load,Short circuit current,Relay protection [1]. THE INTRODUCTION TO GENERAL RESEARCH INSTITUTE FOR NON-FERROUS METALS[J]. 有色金属,1987,02:76-82. [1]. Non-ferrous Metals Companies Post Gloomy Operating Results for Q1-Q3[J]. China Nonferrous Metals Monthly,2013,11:9-10. [2]. Guangxi non-ferrous metal in