《某冶金机械厂总降压和机加工车间低压配电系统设计》 (1)》-毕业论文.docVIP

某冶金机械厂总降压和机加工车间低压配电系统设计 摘要：工厂供电系统就是将电力系统的电能降压再分配电能到各个厂房或车间中去，它由工厂降压变电所，高压配电线路，车间变电所，低压配电线路及用电设备组成。工厂总降压变电所及配电系统设计，是根据各个车间的负荷数量和性质，生产工艺对负荷的要求，以及负荷布局，结合国家供电情况,解决对各部门安全可靠，经济技术的分配电能的问题。其基本内容有以下几方面：进线电压的选择, 变配电所位置的选择, 短路电流的计算及继电保护, 电气设备的选择,车间变电所位置和变压器数量、容量的选择, 防雷接地装置设计等。 关键词：计算负荷，继电保护，变压器，短路电流 The Design of Step-down Substation in The Metallurgical Machinery Factory And Machining Workshop Low-voltage Distribution System Abstract: Factory power supply system is mean to cut down the power systems’ energy and distribut power to each plant or workshop, It consists of step-down substation plant, h- igh pressure distribution lines, substation plant, low-voltage distribution lines and electric equipment. The design of total step-down substation and distribution system is according to the number and nature of the load in each workshops, the requirements of the load in Pr- oduction process and distribution of the Load ,Combination of the national power supply situation to resolve each departments problem that how to distribute power Safely, reliabl- ely, Economically and technology. The basic contents are as follows, Line voltage select- ion, Substation location selection, Calculation of short circuit current and relay protection，The choice of electrical equipment and the plant substation location, The number and ca- pacity of transformers, the design of Lightning Grounding Device, and so on. Key words: Calculated load, Relay Protection, transformers, short-circuit current 目 录 TOC \o 1-3 \h \u HYPERLINK \l _Toc1146 第一章 绪 论 PAGEREF _Toc1146 1 HYPERLINK \l _Toc26136 1.1 工厂供电的意义和要求 PAGEREF _Toc26136 1 HYPERLINK \l _Toc18705 1.2 工厂供电设计的一般原则 PAGEREF _Toc18705 2 HYPERLINK \l _Toc5977 1.3 设计要求 PAGEREF _Toc5977 3 HYPERLINK \l _Toc23253 第二章 设计背景资料 PAGEREF _Toc23253 4 HYPERLINK \l _Toc2457 2.1 工厂的总平面布置图 PAGEREF _Toc2457 4 HYPERLINK \l _Toc17689 2.2 工厂情况 PAGEREF _Toc17689 4 HYPERLINK \l _Toc24799 2.3 工厂各车间负荷情况及车间变电所的容量 PAGEREF _Toc24799 5 HYPERLINK \l _Toc2