110kV变电所毕业设计2

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1、 第 1 页 共 72 页 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 盐北变电所。 本工程初步设计内容包含变电所电气设计，新建的盐北变电所从110KV 侧东郊变电所受电，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所电气设计。 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 ： 变电所 主变压器 潮流计 算 短路

2、计算 设备选型 第 2 页 共 72 页 SUMMARY For satisfying the demand that economy development, the authorities concerned decide to construct a YanBei transformer substation. This engineering first step design contents includes the transformer substation of electric Design. The new-et up salt a YanBei transformer

3、substation obtain power form Dong Jiao 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 gra

4、de 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