火力发电厂电气部分设计方案s

毕业设计任务：

3*50MW火力发电厂电气部分设计

指导教师：

班级：级电力系统及其自动化

题目类型：工程设计

学生姓名：

火力发电厂电气部分设计说明书

工程编号

工程完成人

摘要：本次毕业设计的题目是《火力发电厂电气部分设计》.根据设计的要求,在设计的过程中,根据变电站的地理环境,容量和各回路数确定变电站电气主接线和站用电接线,并选择各变压器的型号。进行参数计算,画等值网络图,并计算各电压等级侧的短路电流,列出短路电流结果表。计算回路持续工作电流,选择各种高压电气设备,并根据相关技术条件和短路电流计算结果表校验各高压设备. 随着科学技术的发展,网络技术的普及,数字化技术成为当今科学技术发展的前沿,变电站数字化对进一步提升变电站综合自动化水平将起到极大促进作用,是未来变电站建设的发展方向.利用数字化技术来解决目前综合自动化变电站存在的问题已成为可能.本变电站就是利用数字化技术使变电站的信息采集,传输,处理,输出过程全部数字化,并使通信网络化,模型和通信协议统一化,设备智能化,

运行管理自动化. 通过本次设计,学习了设计的基本方法,巩固学过的知识,培养独立分析问题的能力,而且加深对变电站的全面了解. 关键词：主接线,短路电流,电气设备,主变保护,配电装置,EDCS-6200

Abstract：.According to the design request, in the design process, according to the transformer substation geographical environment, the capacity and various return routes number determined the transformer substation electricity host wiring and the station use electricity the wiring, and chooses various transformers the model。 Carries on the parameter computation, the picture equivalent network chart, and calculates various voltages rank side the short-circuit current, lists the short-circuit current result table。 Calculates the return route continually operating current, chooses each kind of high pressure electrical equipment, and verifies various high pressure unit according to the correlation engineering factor and the short-circuit current computed result table.

Along with the science and technology development, the networking popularization,the digitized technology will become now the science and technology development the front, the transformer substation digitization to further promotes the transformer substation synthesis automation level to get up to the limit the big promoter action, is the future transformer substation construction development direction. Solves at present using the digitized technology to synthesize the automated transformer substation existence the question possibly to become.This transformer substation is causes the transformer substation using the digitized technology information gathering, the transmission, processing, the output process to digitize completely, and causes the correspondence network, the model and communication protocol unitizing, the equipment intellectualization, the movement management automation.

Through this design, has studied the design essential method, since the consolidated four years have studied the knowledge, raises the independent analysis question ability, moreover deepens to the transformer substation comprehensive understanding.

Key words：Main wiring, Short-circuit current, Electrical equipment, The host changes the protection, Power distribution equipment,EDCS-6200

目录

前言5

第一章原始资料分析5

第二章主接线的设计6

第三章变压器的选择9

3.1主变压器的选择9

3.1.1 主变压器台数的选择10

3.1.2 主变压器型式的选择10

3.1.3主变压器选择：11

第四章短路电流计算和主要电气设备选择13

4.1短路计算的目的,规定与步骤13

4.1.1短路电流计算的目的13

4.1.2短路计算的一般规定14

4.2电气设备选择的一般原则14

4.3按正常工作条件选择电气设备15

4.3.1额定电压15

4.3.3环境条件的影响16

4.4电气设备选择16

第五章继电保护配置27

5.1系统继电保护及自动装置27

5.2继电保护配置原则27

5.3主变压器保护27

第六章电测量仪表与绝缘监视装置28

6.1电测量仪表28

6.2电测量仪表28

6.3变配电装置中各部分仪表的配置29

参考文献：30

设计体会：30