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600MW区域发电厂电气部分设计
系 别: 机电与自动化学院
专 业 班: 电气工程及其自动化 姓 名: 学 号: 指导教师:
2012年5月
600MW区域发电厂电气部分设计
Electrical Design of 600MW Regional
Power Plant
摘 要
由发电、配电、输电、变电和用电等环节组成的电能生产与消费系统。它的功能是将自然界的一次能源通过发电动力装置转化成电能,再经输、变电系统及配电系统将电能供应到各负荷中心。
电气主接线是发电厂、变电所电气设计的首要部分,也是构成电力系统的重要环节。电能的集中开发与分散使用,以及电能的连续供应与负荷的随机变化,就制约了电力系统的结构和运行。电力系统要实现其功能,就需在各个环节和不同层次设置相应的信息与控制系统,以便对电能的生产和输运过程进行测量、调节、控制、保护、通信和调度,确保用户获得安全、经济、优质的电能。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。所以对于主接线的方式选择,以及各项参数的具体计算,是设计中的主要解决内容。同时,短路电流和防雷保护的考虑,也对整个设计有很密切的联系,对于这两个部分的计算,也是一个重点。本文是对配有4台150MW汽轮发电机的大型火电厂一次部分的初步设计,主要完成了电气主接线的设计。设计的内容部分包括电气主接线的形式的比较、选择;主变压器、启动/备用变压器和高压厂用变压器容量计算、台数和型号的选择;短路电流计算和高压电气设备的选择与校验; 并作了变压器保护。
关键词:发电厂 变压器 电力系统 继电保护 电气设备
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Abstract
By the power generation, transformation, transmission and distribution of electricity and energy components, and other aspects of production and consumption systems. It is the function of the natural world through the power of primary energy into electrical energy power plant, then lost, transforming the system and distribution system will supply power to the load centers.
Electrical wiring is the main power plant, electric substation designed first and foremost part of the power system is also constitute an important part. Determination of the main cable on the power system as a whole and power plants, substations to run its reliability, flexibility and economy are closely related. This article is equipped with 4*150MW turbo-generator of large-scale thermal power plants a part of the preliminary design of the main completed the main electrical wiring design. Including the electrical wiring of the main forms of comparison, the choice; main transformer, the start / stand-by transformer and the high-voltage transformer factory with the capacity of calculation, the number of models and options; short-circuit current calculation and high-voltage electrical equipment selection and validation; and made the protection of transformer .
Key words: power plant transformer power system relay electrical equipment
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