前言
110KV宜阳变电站是为了解决宜阳县区及周边煤矿企业地区电力供应不足的输变电工程中的一个重要工程。随着计算机时代的到来，微机保护在电力系统中已得到了广泛的应用，本文主要围绕对110kV宜阳变电站的电气部分，依据专业的特点和范畴，对变电所的主变压器选择、电气主接线的设计、主要的电气设备选择、继电保护及自动装置的配置作了分析、比较和确定。本次设计的主要内容有电气主接线设计、短路电流计算、主要电气设备选择及校验（包括断路器、隔离开关、电流互感器、电压互感器等）、各电压等级配电装置设计、继电保护和安全自动装置的配置以及专题等。
摘要
为满足经济发展的需要，根据有关单位的决定修建1座110KV宜阳变电站。 本工程初步设计内容包含变电站电气设计，新建的宜阳变电站从110KV侧城
关变电站受电，其负荷分为35KV和10KV两个电压等级。
通过技术和经济比较，现采用下列方案：
1、内设两台三绕组变压器，电压等级为121/37.8/11。 2、110KV进线采用内桥接线形式。
3、本工程初步设计内容包括变电站电气设计。 4、35KV和10KV配电装置同样采用单母线分段接线。 5、所用电分别从10KV两端母线获得。
【关键词】变电站；变压器；潮流计算；短路计算；设备选型
SUMMARY
For satisfying the demand that economy development, the authorities concerned decide to construct a Yi yang transformer substation.
This engineering first step design contents includes the transformer substation of electric Design. The new-et up salt a Yi yang transformer substation obtain power form Cheng guan substation (110KV) . There are two kinds of local loads in the substation,. One is 35KV,the other is 10KV.
Pass the technique to compare with the economy, adopt the following scheme now:
1. There are two three-winding transformers in the substation. Voltage grade adopt 121KV 38.5KV and 11KV.
2. For 110KV main electrical connections shall adopt inside bridge connection.
3. The 110KVenters the line 2 return, The adoption builds trolley wire. 4. For 35KV and 10KV main electrical connections employ single sectionalized bus.
5. Auxiliary power system get power form the 10KV sectionalized bus.
Key phrase:
Change to give or get an electric shock Main transformer Current calculation Short circuit calculation The equipments choose the type
目录
前言.......................................................................................................................................................... 1 摘要.......................................................................................................................................................... 2
目录.......................................................................................................................................................... 4 符号、单位说明，插图、附表清单 ...................................................................................................... 6 引言.......................................................................................................................................................... 7 第一章 原始资料分析 ............................................................................................................................ 8
一、原始资料 .................................................................................................................................. 8 二、对原始资料的分析计算 .......................................................................................................... 8 第二章110KV宜阳变电站接入系统设计 .............................................................................................. 9 第三章110KV宜阳变电站主变选择 .................................................................................................... 11
一、 主变方案选择 ...................................................................................................................... 11 二、主变方案技术比较 ................................................................................................................ 11 三、 主变容量、参数选择 .......................................................................................................... 12 四、主变方案经济比较 ................................................................................................................ 14 五、主变110KV侧分接头选择 .................................................................................................... 15 第四章 主接线设计 .............................................................................................................................. 16
一、选择原则 ................................................................................................................................ 16 二、 110KV主接线设计 ............................................................................................................... 16 三、 35KV主接线设计 ................................................................................................................. 19 四、10KV主接线设计 ................................................................................................................... 19 第五章 短路电流计算 .......................................................................................................................... 20
一、变电站各种数据及短路电流 ................................................................................................ 20 二、变电所电抗的归算变电站 .................................................................................................... 20 三、电抗等值图化简 .................................................................................................................... 21 第六章 变电站电气设备选择 .............................................................................................................. 22
一、选择设备的基本原则 ............................................................................................................ 22 二、断路器的选择 ........................................................................................................................ 23 三、隔离开关的选择 .................................................................................................................... 29 四、 电流互感器的选择 .............................................................................................................. 34 五、 电压互感器选择 .................................................................................................................. 42 六、避雷器的选择 ........................................................................................................................ 43 八、消弧线圈选择 ........................................................................................................................ 45 第七章 继电保护配置 .......................................................................................................................... 45
一、主变压器保护配置 ................................................................................................................ 46 二、母线保护 ................................................................................................................................ 46 三、线路保护 ................................................................................................................................ 46 结论........................................................................................................................................................ 47 致谢........................................................................................................................................................ 48 附录........................................................................................................................................................ 49 参考文献 ................................................................................................................................................ 51