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1、2600MW火电厂电气主接线方案初步设计毕业设计论文2600MW火电厂电气主接线方案初步设计 摘要 电气主接线是发电厂、变电所电气设计的 主要部分,也是构成电力系统的重要环节。主接线的确定对电力系统整体及发电厂、变电所本身的运行的可靠性、灵活性和经济性密切相关。并且对电气设备的选择、配电装置的配备、继电器的保护和控制方向的拟定有较大的影响。发电厂的主接线是保证电网的安全可靠、经济运行的关键,是电气设备布置选择、自动化水平和二次回路设计的原则和基础。2600MW 火电机组目前已经是我国电力系统中的主力机组,由 2600MW 机组为主的火力发电厂也属于我国电力系统的大型主力发电厂。 本设计讨论的是
2、 2600MW 火电厂电气主接线方案与设备布置,火电厂电气一次部分设计是电力工程设计的主要工作之一,设计的合理与否对于提高电力系统运行的可靠性、经济性具有重要意义。它对发电厂内电气设备选择和布置,继电保护和自动装置的设计起到决定性作用。设计详细说明了各种设备选择的基本的要求和依据。在分析原始资料,确保供电可靠,调度灵活,满足各项技术要求的基础上,选择出一种与发电厂在系统中的地位和作用相适应的接线方式,接下来选择了主变压器,进行了短路计算,设备选择,设备校验,然后进行了设备布置方案的设计,绘制了主接线图、配电装置平面布置图、配电装置进线断面图和配电装置配置图。本设计注意了新技术和新型设备的应用,
3、把握了当代设计新趋势。 本文本课题的设计内容主要完成 2600MW 机组火力发电厂的电气主接线方案拟定、设备选型和装置布置的初步设计,同时还应考虑今后扩建的可能性,并采用 CAD 绘制指定的图纸。通过对原始资料的分析,了解本厂的具体情况及其在系统申的地位,作用:依据可靠性、灵活性、经济性,对电气主接线进行分析,从而选择最适合本厂情况的主扫线方案,为选择最适合的电器设备及继电保护装置进行了短路电流保护的配置及整定,从面满足可靠、灵敏、快速且有选择的要求。 关键词:发电厂;电气主接线设计;短路计算;电气设备选择2600MW火电厂电气主接线方案与设备布置设计 THE DESIGN OF MAIN E
4、LECTRICAL WIRING AND LAYOUTIN THERMAL POWER PLANT OF 2 600MW Electrical wiring is the main power plant, substation electrical design of main part, but also constitute an important part of power system. The main connection to determine the overall power system and power plants, substations operating
5、reliability, flexibility and economy are closely related. And the choice of electrical equipment, power distribution equipment, relay protection equipment and control the direction of the development has a great influence. The main wiring of power plant is to ensure the safe and reliable network, th
6、e economic operation of the key, is the choice of electrical equipment layout, the level of automation and the two circuit design principle and basis. 2 * 600MW unit is the main units in the power system, the main power plant of large thermal power plant is composed of 2 * 600MW units also belong to
7、 the electric power system in china. This design is about 2 * 600MW thermal power plant electric main wiring scheme and equipment layout, design a part of power plant electric is one of the main work of the electric power engineering design, the design is reasonable or not is very important for impr
8、oving the reliability, the economical operation of the power system. The power plant electrical equipment selection and layout, the design of relay protection and automatic device plays a decisive role. Design details the various equipment selection of basic requirements and on the basis of. In the
9、analysis of the original data, ensure reliable power supply, flexible scheduling, meet all kinds of technical requirements, select the connection mode and the role of a power plant in the status of the system to adapt, then select the main transformer, the short circuit current calculation, equipmen
10、t selection, ABSTRACT equipment calibration, and then the design of equipment layout plan the main wiring diagram, drawing, power distribution equipment, power distribution equipment layout into (out of) the line section and power distribution equipment configuration diagram. The design and applicat
11、ion of new technology and new attention to the equipment, grasp the new trend of contemporary design. The preliminary design design content of this text research mainly develop, main electrical connection scheme for 2 * 600MW units in thermal power plant equipment 2600MW火电厂电气主接线方案与设备布置设计 selection a
12、nd arrangement, also should consider the possibility of expansion in the future, and the use of CAD drawing the specified drawing. Through the analysis of the original data, to understand the specific situation of the factory and its role in the system: according to the status, application reliabili
13、ty, flexibility and economy, the main electrical wiring are analyzed, so as to select the main sweep line scheme is most suitable for the factory, the short circuit current protection configuration and setting for electrical equipment and the relay protection device to select the most suitable, reli
14、able, sensitive, from the surface to meet the requirements of fast and selection. Key words: Thermal power plant ; The main electrical wiring ; short circuitcalculation;equipment selection1.1 电气主接线 电气主接线既是电气设计的首要部分,又是构成电气系统的主要环节。电气主接线是由电气设备通过连接线,按其功能要求组成接受和分配电能的电路,成为传输强电流、高电压的网络,故又称之电气主系统或一次接线。主接线代表
15、了发电厂电气部分的主体 结构,是电力系统网络结构的重要组成部分,直接影响运行的可靠性、灵活性并对电器 选择、配电装置布置、继电保护、自动装置和控制方式的拟定都有决定性的关系。因此, 主接线的正确合理设计,必须综合处理各个方面的因素,经过技术、经济论证比较后方 可确定5。 1.1.1 电气主接线的基本要求 1)运行的可靠性:主接线系统应保证对用户供电的可靠性,特别是保证对重要负荷的供电。 2)运行的灵活性:主接线系统应能灵活地适应各种工作情况,特别是当一部分设备检修或工作情况发生变化时,能够通过倒换开关的运行方式,做到调度灵活,不中断向用户的供电。在扩建时应能很方便的从初期建设到最终接线。 3)
16、主接线系统还应保证运行操作的方便以及在保证满足技术条件的要求下,做到经济合理,尽量减少占地面积,节省投资1。 1.1.2 电气主接线的设计原则 设计是工程建设的重要组成部分,是先进技术转化为生产力的组带。合理的设计对工程建设的工期、质量、投资费用以及投产的运行安全和生产的经济效益起着决定性的作用。 设计的基本任务是,在工程建设中贯彻国家的基本建设方针和技术经济政策,做出切合实际,安全适用、技术先进、综合经济效益好的设计,有效地为电力建设服务。 (1)遵守国家得法律、法规,贯彻执行国家经济建设的方针、政策和基本建设程序, 2600MW火电厂电气主接线与设备布置方案设计 设计说明书 1电气主接线设计 特别应贯彻执行提高综合经济效益和促进技术进步的方针。 要运用系统工程的方法从全局出发,正确处理中央与地方、工业与农业、沿海与内地、城市与乡村、远期与近期、平时与战时,技改与新建、生产与生活、安全与经济等方面的关系。 要根据国家规范