毕业论文 火力发电厂电气部分设计.doc

毕业论文 火力发电厂电气部分设计

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2台50MW和2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; 并作了变压器保护配置。
[关键词] 发电厂；变压器；电力系统；继电保护；电气设备      

The Design Of Steam power plant electrical part

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 China's thermal power equipment capacity of the total installed capacity of 75%. This article is equipped with 2*50 and 2*300MW 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.

 
目   录
1  引 言 1
2  电气主接线设计 2
2.1  原始资料 2
2.2  主接线方案的拟定 2
2.3  主接线方案的评定 3
2.4  发电机及变压器的选择 3
3  短路电流计算 6
3.1  概 述 6
3.2  系统电气设备电抗标幺值计算 6
3.3  短路电流计算 7
3.3.1  10.5kV侧短路计算 7
3.3.2  220kV侧短路计算 9
3.3.3  330kV侧短路计算 12
4  电气设备的选择 16
4.1 断路器的选择 16
4.1.1  330kV侧高压断路器的选择 16
4.1.2  220kV侧高压断路器的选择 18
4.1.3  10.5kV侧断路器的选择 20
4.2  隔离开关的选择 23
4.2.1  330kv侧隔离开关的选择 23
4.2.2  220kV侧隔离开关的选择 25
4.2.3  10.5kV隔离开关的选择 27
4.3  电流互感器的选择 29
4.3.1  330kV侧电流互感器的选择 30
4.3.2  220kV侧电流互感器的选择 32
4.3.3  10.5kV侧电流互感器的选择 34
4.4  电压感器的选择 35
4.4.1  330kV侧TV的选择 36
4.4.2  220kV侧TV的选择 37
4.4.3  发电机TV的选择 37
4.5  导体的选择及校验 38
4.5.1　330kV母线选择 38
4.5.2  330kV连接线选择 39
4.5.3  220kV母线选择 40
4.5.4  220kV连接线选择 41
4.5.5  10.5kV母线选择 41
4.5.6  发电机端封闭母线的选择 42
5  配电装置规划及布置 43
5.1  概  述 43
5.2  屋内配电装置 43
5.3  屋外配电装置 44
5.4  发电机与配电装置的连接 44
6  主系统保护配置整定 45
6.1 系统防雷保护 45
6.1.1  330kV侧避雷器的选择和校验 46
6.1.2  220kV侧避雷器的选择和校验 46
6.1.3  10.5kV侧避雷器的选择和校验 47
6.2  变压器继电保护配置及整定 48
6.3  发电机继电保护配置及整定 49
6.4  输电线路保护 52
总  结 53
致  谢 54
参考文献 55
外文翻译 55
附录Ⅰ 60
附录Ⅱ 61