水电站电气一次设计

——————————————————————————————————————————————— 水电站电气一次设计

目录

摘 要 .............................................................................. 3

Abstract: ............................................................................ 4

第一章 工程概况 ................................................................... 5

1.1工程基本概况 .................................................................. 5

1.2 工程建设条件 ................................................................. 5

第二章 接入系统方案设计 .......................................................... 5

2.1输电线路设计 .................................................................. 5

2.2 电气主接线方案 ............................................................... 6

第三章 短路电流计算 ............................................................. 11

3.1 各元件的电抗标幺值........................................................... 12

3.2 d1点短路计算 ................................................................ 12

3.3 d2点短路电流计算 ............................................................ 16

第四章 电气设备的选择 ........................................................... 18

4.1 6.3KV侧电气设备的选择 ......................................................

18

4.2 35KV侧电气设备的选择 .......................................................

29

第五章 厂用电设计 ................................................................ 34

5.1 厂用电负荷的确定............................................................. 34 ——————————————————————————————————————————————— 5.2 厂用变压器选择 .............................................................. 36

5.3 厂用电出线侧电气设备的选择 ................................................... 37

第六章 厂房电气设备布置 ......................................................... 39

6.1 电气设备布置的原则........................................................... 39

6.2 机组电气设备布置特点......................................................... 40

6.3 厂房布置 .................................................................... 40

6.4 户内配电装置布置............................................................. 40

第七章 水电站防雷与接地保护 ....................................................

42

7.1 直接雷保护 .................................................................. 42

7.2 雷电侵入波保护 .............................................................. 43

7.3 感应雷的防护 ................................................................ 43

7.4 水电站接地 .................................................................. 44 参考文献 .......................................................................... 45 附录 ............................................................... 错误！未定义书签。

致谢 ............................................................... 错误！未定义书签。

附图

摘 要：坪头水电站位于宝鸡市陈仓区坪头镇周川村的渭河干流上，是一座利用渭河水力资源发电的低坝无调节引水式电站。该电站规划水头14.75m,设计引水流量84.75机容量10000KW,多年平均发电量3675万KW﹒h,输出电能并入西北电网。 ——————————————————————————————————————————————— 本次设计的主要内容是进行并网电压的选择，升压变电站及输电线路布置，电气主接线及厂用电的方案比较；根据主接线型式选择相应的导线截面、变配电设备，并对其进行优化布置，进而确定各配电室和户外变电站面积及建筑设计要求；主要电器设备的选择与校验，户内外电器设备的布置，厂用电设计及水电站防雷与接地。 ,装

关键词：电气一次；电气设备；短路电流计算；防雷接地

Pingtou Hydroelectric Power Station

Preliminary design

Abstract: Pingtou hydropower station is located in treasure chicken

Chen cang breaks out ZhouChuan village head of the ping of weihe river,

is a use of weihe hydraulic resources to generate electricity without

adjusting low dam water type power station. The plant 14.75 m, design

planning head 84.75 diversion dischage, installed capacity, the average

years 10000KW power-demand 3675 million KW cardin h, output power

into the northwest power grid.

This design is the main content of choice, boost interconnection of

voltage substations and transmission line layout, the main electrical

wiring and apc scheme comparison; According to Lord wiring type

choose corresponding wire section, transfering &transforming

equipment, and carries on the optimum arrangement, and then

determines various operations and outdoor substation area and

architectural design requirements; Main electrical equipment selection ——————————————————————————————————————————————— and calibration of internal and external electrical equipment, household

decorate, apc lightning protection and grounding design and hydropower

station.

Key words: onetime electricity；electrical equipment；electric

current of short circuit calculation；thunder proofing and ground

connection

第一章 工程概况

1.1工程基本概况

坪头一级水电站工程位于宝鸡市陈仓区坪头镇周川村的渭河干流上，距宝鸡市区35KM。宝鸡峡林家村引水枢纽工程以上陕西境内渭河干流长70KM，平均比降3.5‰，地处深山峡谷，河道蜿蜒曲折，蕴藏着丰富的谁能资源。坪头水电站坝址布置于坪头公路隧道洞以西出口上游200米处的渭河干流上，厂房布置在坪头公路隧道出口以东的桥北侧。为低坝引水式径流水电站，装机10000KW，引水坝址在坪头镇下游1.7KM处的坪头镇鹪鹩庄村，场址在鹪鹩沟下游2.1KM处的庙沟村。