摘 要
本毕业设计论文是对6 200MW火力发电厂电气部分进行初步设计。
论文共分说明书、计算书两大部分,详细的说明了各种设备选择的最基本的要求和原则依据以及计算过程。其中第一部分分九章,有设计任务书,变压器的选择,包括:发电厂主变压器、高压备用变压器及高压厂用变压器的台数、容量、型号等主要技术数据的确定。电气主接线,主要介绍了电气主接线的重要性、设计依据、基本要求、各种接线形式的优缺点以及主接线的比较选择。厂用电接线,包括:厂用电接线的总要求、厂用母线接线设计。短路电流计算,是最重要的环节,本书详细的介绍了短路电流计算的目的、条件、一般规定、元件参数的计算、网络变换等知识。高压电气设备的选择,包括母线、高压断路器、隔离开关、电流互感器、电压互感器、限流电抗器的选择原则和要求。并简单的介绍了高压配电装置的设计原则、要求和220KV的配电装置。及继电保护和自动装置的规划,包括总则、自动装置、一般规定和发电机、变压器、母线等设备的保护。第九章,发电厂和变电所的防雷保护,包括选择的基本原则、避雷针和避雷器的设计。
第二部分为计算书,分别是对主变压器及厂用变压器进行计算选择。进行短路电流计算,算出所选各短路点的短路电流。对高压电器的选择以及进行效验。防雷保护计算,根据变电所面积计算出避雷针针高。此外,为了方便读者对内容的理解和应用,在适当的位置附加了图纸(主接线、平面图、断面图、防雷保护等)。 〖资料来源:毕业设计(论文)网 www.〗
关键词:电力系统 母线 高压断路器 〖资料来源:毕业设计(论文)网 WWW.〗
Abstract
This paper is the designation to 6*200MW----- thermal power plant electricity part.
The paper is ided into two major part the manual and calculation books, expatiation every kind of most basic request of equipments choose with principle basis and the process of calculation. Among them the first part ides nine chapters. choice for transformer, including: the definition of the main technique in number, capacity, model number…etc. of main transformer, high voltage reserved transformer and high voltage factories in Power plant. electricity lord connecting line, primarily introducing the importance of electricity lord connecting linear, basic request of designing, basic request, the advantages and fault of every kind of connecting line form and choice of lords connect. the factory connects the line with the electricity, including: the total request of the electric boundary used by plant, bus designing in plant. a calculation on short current is the most important part.
There are detailed introduction on purpose requirement general provision calculation on parameter transformation of network etc. choice of high voltage electrical equipment, including the principle of choice and requirement of bus high voltage circuit breaker isolation switch current transformer voltage transformer current limited reactor. But a designed principle requirement and 220kV power distribution equipment are introduced in it. A programming for relay protection and Auto equipment include the principles Auto equipment general requirement and the protection of generator transformer bus etc. The protection from thunder in power plant and distribution station include choosing with the design of the surge arrester, lightning arrester. The second part is calculation book. Separately has a choice calculation on main transformer and plant transformer. A calculation on short circuit current, to get each short circuit current number. There will be a choice of the high voltage equipment and then a check. The thunder protection compute, according to the surface area of the transformation station to give or get the lightning rod needle high. In addition, for the sake of convenient reader to the comprehension of the contents with apply, in the appropriate position additional drawing paper were settled. (The lord connection of the line picture, plate picture, crossing section drawing and defending the thunder protection drawing etc.) 〖资料来源:毕业设计(论文)网 5 6 D O C.C O M〗
Key Words: Power system Bus High voltage circuit breaker
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1 设计题目
锦州6×200W火电厂一期工程电气部分初步设计
2 设计原始资料及依据
1、本电厂为凝汽式发电厂,计划安装六台200MW凝汽式火力发电机组。第一期工程已装设三台QFSN-200-2型发电机组,并计划第二期再安装三台同样容量的机组,每台发电机配置一台670T/H的高温高压锅炉。
2、发电机型号为QFSN-200-2,额定容量200MW,额定电压15.75KV,cosΦ=0.85,Xd”=0.1413,接线方式为Y,本厂的燃料是煤粉。
3、该厂以220KV线路与系统联系,本工程220KV的出线共7回,预计将来 220KV出线最终为10回,高压厂用电压为6KV。
4、连接在发电厂220KV系统阻抗标幺值为X1=0.25(基准功率Sj=100MVA)
气象条件:夏季最高温度为38。C,冬季最低气温为-25。C,年平均温度为10。C,海拔高度为700米,厂址附近无严重空气污染,该地区为五级地震区。
5、220KV系统出线都装有瞬时动作的主保护和后备保护,其后备保护动作时间为3秒。
目 录 26000字
摘 要 I
Abstract II
引 言 1
第一部分 说明书 2
设计任务书 2
1 设计题目 2
2 设计原始资料及依据 2
3设计的主要内容及要求 3
〖资料来源:毕业设计(论文)网 www.〗
〖资料来源:毕业设计(论文)网 5 6 D O C.C O M〗