某地区×MW火力发电厂电气部分设计 电气自动化专业毕业设计.doc

I 某地区4×300MW火力发电厂电气部分设计 摘 要 由发电、变电、输电、配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。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。并且对电气设备选择、配电装置配置、继电保护和控制方式的拟定有较大的影响。电能的使用已经渗透到社会、经济、生活的各个领域而在我国电源结构中火电设备容量占总装机容量的75。本文是对配有4台300MW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。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。 II Electrical design of 800MW regional power plant Author: Tutor: 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. And choice of electrical equipment power distribution equipment configuration relay protection and control of the means to develop a greater impact. The use of power has infiltrated the social economic in all areas of life and in the power structure of Chinas thermal power equipment capacity of the total installed capacity of 75. This article is equipped with 4300MW 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