卧龙小区电气设计计算书.doc

1、目 录摘要IAbstractII引言11 设计概况11.1 小区概况11.2 设计依据11.3 设计要求21.4 设计成果22 设计计算书22.1 负荷分析22.2 负荷统计计算22.3 无功功率计算及补偿42.3.1 电力电容接线方式42.3.2 无功补偿方式52.3.3 无功补偿容量52.3.4 并联电容器的选择63 变电所位置和形式的选择63.1概述63.2 小区变配电所的布置及结构方案73.2.1 配电室的结构73.2.2 值班室的结构83.3 变电所位置的确定84 主变压器台数和容量的确定94.1 变压器主变台数的选择94.2 变电所主变压器容量的选择95 变电所主接线方案的选择10

2、5.1 变电所主接线方案的评价105.2 变电所主接线方案的确定105.2.1 电源进线105.2.2 母线105.2.3 高压配电出线115.2.4 低压配电出线116 短路电流计算116.1 短路计算的意义和内容116.1.1 短路计算的目的116.1.2 短路计算的内容116.2 短路电流计算方法116.3 短路计算点的选取126.3.1 变电所相关节点的短路计算：126.3.2 系统最小运行方式：147 变压器一次设备的选择与校验167.1 概述167.2 高压一次设备的选择和校验167.2.1 高压断路器的选择与校验167.2.2 高压避雷器的选择167.2.3 高压电流互感器的选择

3、与校验177.2.4 高压电压互感器的选择177.2.5 高压熔断器的选择177.2.6 高压开关柜的选择177.3 低压一次设备的选择和校验187.3.1 受电柜和母联柜的低压断路器电流脱扣器的选择与校验187.3.2 低压出线柜断路器的选择与校验188 变电所继电保护设计208.1 概述208.2 变压器保护设置218.2.1 瓦斯保护218.2.2 过电流保护218.2.3 电流速断保护228.2.4 过负荷保护228.2.5 低压侧单相短路保护229 照明系统229.1 光源照度计算239.1.1 电气照明概述239.1.2 确定合适的光源239.1.3 照明灯具的选择与布置239.1

4、.4 照度计算249.1.5 插座系统329.2 电源进线设计349.2.1 标准层户开关箱系统计算：349.2.2 住户开关箱出线线路选择349.2.3 单元开关箱和总开关箱系统计算及线路选择359.3 照明线路的控制与保护359.3.1 照明支路的分路359.3.2 照明灯的控制369.3.3 照明线路的保护方式3610 弱电系统设计3610.1 概述3610.2 有线电视系统3610.3 电话系统3610.4 网络布线系统3710.5 访客对讲系统3711 防雷和接地装置的确定3711.1 概述3711.2 变电所防雷接地系统设计3711.2.1 变电所防雷措施3711.2.2 变电所接

5、地措施3811.3 单体楼的防雷接地系统设计3911.3.1 保护接地4011.3.2 建筑防雷40参考文献41致谢42附录43ContentsAbstractIIIntroduction11 Design general situation11.1 Neighborhood general situation11.2 Design basis11.3 Design demand 21.4 Design achievement22 Design calculatin sheet22.1 load analysis22.2 load statistic calculation22.3 The c

6、alculation and compensation of reactive power42.3.1 The mode of connection of electric power capacity42.3.2 The mode of reactive power compensation52.3.3 The volume of reactive power compensation52.3.4 The choice of capacity in parallel63 The choice of station and form of substation63.1Summary63.2 S

7、tructure project and decoration of substatin73.2.1 Structure of switching room 73.2.2 Structure of duty room83.3 Location of substation 84 The quantity and volume of main transformer94.1 The choice of main transformer quantity 94.2 The choice of main transformer volume95 The choice of substation mai

8、n wiring scheme 105.1 Scheme evaluation105.2 Setting main wiring scheme 105.2.1 Power input wire105.2.2 Bus105.2.3 High voltage power output line115.2.4 low voltage power output line116 short-circuit current calculation116.1 Meaning and content116.1.1 Purpose116.1.2 Content116.2 The method of calcul

9、ation 116.3 The choice of location126.3.1Short-circuit current calculation of relatad point 126.3.2 Minimum operation mode of system 147 Selection and calibration of transformer main equipment167.1 Summary167.2 Selection and calibration of hign voltage equipment167.2.1 Selection and calibration of h

10、igh voltage circuit breaker167.2.2 Selection of high surge arrester167.2.3 Selection and calibration of high-tension current inductor177.2.4 Selection of high voltage potential transformer177.2.5 Selection of high voltage fuse177.2.6 Selection of high-tension switch cabinet177.3 Selection and calibr

11、ation of lower voltage transformer main equipment187.3.1 Selection and calibration of current tripof the electrical cabinet187.3.2 Selection and calibration of lower voltage output cabinet188 The design of relay protection208.1 Summary 208.2 Protection settings of transformer218.2.1 Gas protection21

12、8.2.2 Over-current protection218.2.3 Current quick break protection22 8.2.4 Overload protection228.2.5 The single phase short circuit protection on the low voltage side229 Lighting system229.1 Light intensity of illumination computation239.1.1 Summary of electric lighting239.1.2 The selection of app

13、ropriate light source239.1.3 The selection and decoration of Lighting lamps239.1.4 Illumination calculation249.1.5 The socket system329.2 The design of power supply into line349.2.1 Switch box system design and calculation of standard layer349.2.2 The selection of residents output line of switch box

14、349.2.3 Unit switch box and total switch box system calculation and line selection359.3 Controlling of lighting circuit and protection359.3.1 The branch of lighting branch359.3.2 The control of the light 369.3.3The protection mode of the lighting circuit3610 Designing weak-electrical system3610.1 Summary 3610.2 Cable TV system3610.3 Telephone system3610.4 Network wiring system3710.5Visitors intercom system3711 The determination of lightning protection and grounding device3711.1 Summary3711.2 The design of subs