1、i本科毕业论文（20 届）220kV 枢纽变电站电气一次部分设计所在学院专业班级 电气工程及其自动化学生姓名指导教师完成日期ii目 录摘要 .IAbstract.II引言 .11 电气主接线的选择 .11.1 主接线概述 .11.2 电气主接线设计的基本要求 .21.3 主接线接线方式概述 .21.4 主接线方案的初步比较 .21.4.1 220kV 侧主接线选择 .21.4.2 110kV 侧主接线选择 .21.4.3 10kV 侧主接线选择 .31.5 主接线方案的选择 .32 主变压器的选择 .52.1 主变压器选择的原则 .52.2 变压器台数的选择 .52.3 变压器容量的选择 .5
2、2.4 变压器绕组数和连接组别的选择 .62.5 主变压器的确定 .62.6 电力变压器的布置 .63 短路电流计算 .63.1 短路电流计算目的 .63.2 短路电流计算时采用的假设与原则 .63.3 各侧短路电流计算 .73.3.1 220kV 侧短路电流计算 .73.3.2 110kV 侧短路电流计算 .83.3.3 10kV 侧短路电流计算 .84 电气设备的选择与校验 .114.1 一般规定 .114.2 断路器和隔离开关的选择 .124.2.1 220kV 主变侧和出线断路器、隔离开关的选择 .124.2.2 110kV 侧断路器和隔离开关的选择与校验 .144.2.3 10kV
3、侧电抗器、断路器和隔离开关的选择与校验 .164.3 互感器的选择 .194.3.1 电流互感器的选择与校验 .204.3.2 电压互感器的选择 .24iii4.4 母线和引下线的选择 .254.4.1 引下线的选择 .254.4.2 母线的选择与校验 .274.5 支持绝缘子与 10KV 侧穿墙套管的选择 .284.5.1 穿墙套管的选择 .284.5.2 支持绝缘子选择 .284.6 10kV 侧无功功率补偿计算 .285 所用电的设计 .295.1 变电所的所用电系统设计和设备选择 .295.2 该变电站所用电源及容量的确定 .295.3 所用电源引接线的方式 .296 电气总平面图的设
4、计和配电装置的选择 .296.1 配电装置的选择 .296.1.1 配电装置的概述 .296.1.2 配电装置的类型及应用 .306.1.3 配电装置的确定 .306.2 电气总平面布置 .306.2.1 电气总平面布置的要求 .306.2.2 电气总平面布置的确定 .307 防雷装置保护 .317.1 防雷保护的必要性 .317.2 变电站防雷保护内容 .317.3 避雷针的配置 .317.3.1 避雷针的配置原则 .317.3.2 避雷针配置的确定 .327.3.3 避雷针定位及针距 .327.4 避雷器的选择与校验 .327.4.1 阀式避雷器应按下列条件选择 .327.4.2 各电压等
5、级避雷器的选择与校验 .338 结论 .35参考文献 .36致谢 .37ivContentsAbstract .IIintroduction .11 Main electrical wiring selection.11.1 the main wiring overview .11.2 the basic requirement of the main electrical wiring design .21.3 summary of the main wiring connection mode.21.4 the main wiring scheme of preliminary compa
6、rison.21.4.1 220 kv side main wiring options .21.4.2 110 kv side main wiring options .21.4.3 10 kv side main wiring options .31.5 the main wiring scheme .32 The choice of the main transformer .52.1 Transformer selection principle .52.2 Select the number of transformer stations.52.3 Selection of Tran
7、sformer Capacity .62.4 Select the number of windings of the transformer and connect groups.62.5 Determine the main transformer .62.6Arrangement of power transformers .73 Short circuit calculation .73.1 Short-circuit current calculation purposes .73.2 Short-circuit current assumptions and principles
8、used in the calculations .73.3 Each side of the short-circuit current calculation.83.3.1 220kV side short-circuit current calculation.83.3.2 110kV side short-circuit current calculation.93.3.3 10kV side short-circuit current calculation.114 Select the check of electrical equipment.114.1 General prov
9、isions .114.2 Circuit breakers and disconnectors selection .124.2.1 220kV main transformer side and outgoing circuit breakers, disconnectors choice144.2.2 110kV circuit breaker and isolation switch selection and validation.164.2.3 10kV side reactors, circuit breakers and disconnectors selection and
10、validation .194.3 Transformer selection .194.3.1 Current transformer selection and validation.244.3.2 Voltage transformer selection .254.4 Bus and deflectors choice .254.4.1 Deflectors choice.254.4.2 Bus selection and validation .274.5 Support insulator with 10kV side wall bushing selection.28v4.5.1
11、 Wall bushing selection .28 4.5.2 Support Insulator.285 The power of design.295.1 The electricity substation system design and equipment selection.295.2 The substation is determined by supply and capacity.295.3 The drawing power wiring manner.296 Select the electrical master plan design and distribu
12、tion apparatus.306.1 Select Power Distribution Equipment.306.1.1 Overview Distribution Equipment .306.1.2 Types and application distribution equipment .306.1.3 Determining distribution equipment .306.2 Electric general layout .316.2.1 Electric General layout requirements.316.2.2 Electric determine t
13、he general layout.317 Lightning protection equipment.317.1 The need to protect the mine.317.2 Substation Lightning Protection Content.317.3 Lightning rod configuration .327.3.1 Configuration Guidelines lightning rod .327.3.2 OK lightning rod configuration.327.3.3Lightning location and pitch .327.4 Arrester selection and validation.337.4.1 Surge a
