1、目 录摘要1Abstract2引言31原始资料31.1系统情况31.2 10kV负荷情况41.3本地区气象条件42负荷计算42.1 10kV侧的负荷计算42.2无功补偿42.2.1 无功补偿概述42.2.2无功补偿的计算52.3无功补偿装置52.4并联电容器装置的分组62.5并联电容器装置的接线63主变压器的选择63.1变电站的选址63.2主变压器的选择73.2.1 相数的选择83.2.2 绕组数与结构的选择83.2.3 绕组联接组号的选择83.2.4 调压方式的选择83.2.5 冷却方式的选择83.3规程中的有关变电所主变压器选择的规定83.4主变台数的确定94电气主接线方案的确定104.1
2、 电气主接线的基本要求104.1.1 安全性104.1.2 可靠性114.1.3 灵活性114.1.4 经济性114.2电气主接线方案的选择124.2.1 35kV侧电气主接线的比较134.2.2 10kV侧电气主接线的比较145 短路电流计算155.1 概述155.1.1 产生短路的原因和短路的定义155.1.2 短路的种类165.1.3 短路电流计算的目的165.2 短路电流计算的方法和条件165.2.1 短路电流计算方法165.2.2 短路电流计算条件165.3 短路电流的计算185.3.1 10kV侧短路电流的计算185.3.2 35kV侧短路电流的计算195.3.3 三相短路电流计算
3、结果表206 电气设备的选择206.1电气设备选择的一般性原则206.1.1 技术条件206.1.2 环境条件226.2 断路器隔离开关的选择226.2.1 35kV侧进线断路器、隔离开关的选择226.2.2 35kV主变压器侧断路器、隔离开关的选择246.2.3 10kV侧断路器、隔离开关的选择246.2.4 选择的断路器、隔离开关型号表266.3 母线的选择及校验266.3.1 母线导体选择的一般要求266.3.2 35kV母线的选择276.3.3 10kV母线的选择286.3.4 母线选择结果296.4 互感器的选择296.4.1 电流互感器的选择296.4.2 电压互感器的选择306.
4、5 熔断器的选择316.5.1 熔断器概述316.5.2 35kV侧熔断器的选择326.5.3 10kV侧熔断器的选择326.6 配电装置的选择326.6.1 配电装置概述326.6.2 35kV屋外配电装置326.6.3 10kV高压开关柜327 继电保护的设置337.1 电力变压器保护337.1.1 电力变压器保护概述337.1.2 电力变压器纵差保护接线347.1.3 纵差动保护的整定计算347.1.4 变压器瓦斯保护357.1.5 过电流保护367.2 母线保护368 变电所的防雷保护368.1 变电所防雷概述368.2 避雷针的选择378.3 避雷器的选择379接地概述399.1接地
5、设计39总结41参考文献42致 谢43ContentsAbstract 1Abstract2Introduction21 raw data21.1 system21.2 10kV load31.3 meteorological conditions in the region32 load calculation32.1 10kV side load calculation32.2 reactive power compensation42.2.1 reactive power overview42.2.2 reactive power42.3 reactive power compensat
6、ion device52.4 grouping of parallel capacitor devices52.5 connection of parallel capacitor device63 main transformer selection63.1 substation location63.2 main transformer selection83.2.1 Selection of phase number83.2.2 number and structure of the winding83.2.3 group choose winding connection93.2.4
7、voltage options93.2.5 selection of cooling way93.3 regulation of the transformer substation main transformer selection93.4 the change in the number of104 determination of electrical main wiring scheme114.1 basic electrical wiring114.1.1 security114.1.2 reliability124.1.3 flexibility134.1.4 economics
8、144.2 selection of electrical main wiring scheme144.2.1 35kV side of the main electrical wiring154.2.2 10kV side of the main electrical wiring175 calculation of short-circuit current185.1 overview185.1.1 definition of short circuit cause and short circuit185.1.2 type185.1.3 The purpose of short-circ
9、uit current calculation185.2 methods and conditions for calculating short-circuit current195.2.1 short-circuit current calculation method195.2.2 short-circuit current condition195.3 calculation of short-circuit current215.3.1 10kV side short-circuit current calculation215.3.2 35kV side short-circuit
10、 current calculation235.3.3 three-phase short-circuit current calculation results table236 the choice of electrical equipment246.1 general principles for electrical equipment selection246.1.1 technical condition246.1.2 environmental conditions266.2 choice of circuit breaker isolation switch266.2.1 3
11、5kV side into the circuit breaker, isolating switch266.2.2 35kV main transformer circuit breaker, isolating switch286.2.3 10kV circuit breaker, isolating switch286.2.4 choice of circuit breakers, isolated switch type table296.3 bus selection and check306.3.1 General requirements for bus conductor se
12、lection306.3.2 35kV bus316.3.3 10kV bus336.3.4 bus selection results336.4 choice of transformer346.4.1 current transformer346.4.2 voltage transformer choice356.5 fuse366.5.1 fuse overview366.5.2 35kV side fuse376.5.3 10kV side fuse376.6 power distribution device376.6.1 distribution device overview37
13、6.6.2 35kV outdoor distribution device376.6.3 10kV high voltage switch cabinet387 relay settings397.1 power transformer protection397.1.1 power transformer protection overview397.1.2 power transformer differential relay connection397.1.3 differential protection setting calculation407.1.4 transformer
14、 gas protection417.1.5 over current protection417.2 bus protection428 substation lightning protection428.1 substation lightning protection overview428.2 the choice of lightning rod428.3 the choice of arrester429 grounding429.1 grounding design43Summary43Reference43thank you43VI35KV变电站电气设计 摘要:电能是现代社会中最重要,也是最方便的能源。电能的生产、输送、分配和消费的各种设备组成了电力系统。而变电站是电力系统的重要组成部分,他直接影响整个电力系统的安全与经济运行,是联系发电厂和用户的中间环节,起着变换和分配电能的作用。电气主接线是发电厂变电所的主要环节,电气主接线的拟定直接关系着全厂(所)电气设备的选择、配电装置的布置、继电保护和自动装置的确定,是变电站电气部分投资大小的决定因素关键词: 35kV 变电所 设计The electrical d