田蕾__电气动化专业毕业论文.doc

黑龙江农业工程职业学院 毕业设计报告书 12级电气自动化专业 题 ? 目：工厂供配电发展研究 学生姓名： 田蕾 所在学院： 自动化学院 学科专业： 电气自动化专业 指导教师： 艾明慧 日期：2014年 10月12日 摘要 本文对象为一机械厂，有大量的高低压供电设备。本文通过分析负荷及增容的具体情况，选出新配电室的具体位置，明确负荷等级，调整母线所接负荷，确定系统运行方案及配电柜参数，运用负荷计算、短路电流计算和动热稳定校验计算，选择并校验符合条件的电气设备，设计出二次回路，使变电所一次设备的控制、调节、继电保护和自动装置、测量和信号回路以及操作电源系统能有效的运行。在优化系统的过程中，尽量提高电能的利用率和使用效率，采取多种方式降低线损，从而节约能源节约资金，努力降低改造成本。在对供配电系统进行设计的基础上，根据变配电站实现综合自动化的现状，从设计原则、系统配置及结构、功能、技术指标等方面着手，对本厂变配电室综合自动化系统进行了可行性分析，设计出了符合本厂情况的综合自动化系统。最后，还进行了综合自动化系统的软件设计，使变配电室智能化水平得到了极大地提升。 关键词:负荷计算；二次回路；综合自动化；智能化 Abstract The study object of the paper is about a large fertilizer factory where a lot of high and low voltage supply devices are. According to analyze the concrete situation about the possessed load and the increased capacity, it is to choose the location of the new switch room, definitude the load grade, adjust the load together with generatrix, confirm the system running plan and the parameters of electrical power distribution cabinet. Choosing and testing the electrical devices matched condition, researching and designing the second loop by calculation of load, short circuit current and peak/short-time withstand current test. They can guarantee the effective running for the loop of the controlling, adjusting, relay protection and automation equipment, measurement and signal and the operated supply power. On the course of system optimizing, to save energy, fund and the improving cost, it should raise the utilization and the usage efficiency of electric power as far as possible .At last, it studied the system structure of the automation system and combined ourselves to discuss the foundation of intelligent transformation and distribution station as the basis of realization for the system improvement. On the base of designing the power supply and distribution system，with the state of