低压机组电站中主变压器连接组别的选择  

Selection of main transformer connection symbol for power station with LV generator units

作　　者：周承艳 

机构地区：[1]桂林市水利电力勘测设计研究院,广西桂林541001

出　　处：《广西水利水电》2005年第4期65-66,共2页Guangxi Water Resources & Hydropower Engineering

摘　　要：为了节约投资,充分利用水资源,不少小型水电站都采用了额定电压为0.4 kV的低压发电机组,随着电站容量的增大,主变压器连接组别的选择已成一个突出的问题。结合广西洪水河电站,对低压机组电站中主变压器的连接组别进行分析研究,得出不同容量主变压器的连接组别。洪水河电站主变压器的连接组别最终选择Y/△接法。In order to save cost and make full use of water resources, low-voltage generator units with a rated voltage of 0.4kV are selected for many small-scale hydropower stations. With the increment of station installed capacity, the selection of main transformer connection symbol becomes an outstanding problem. Taking Hongshuihe power station in Guangxi as example, the author analyzed and studied the connection symbols of main transformers used in power stations with low-voltage generator units, and deducted the connection symbols corresponding to main transformers with different capacities, y/△ connection symbol is finally selected for main transformer of Hongshuihe power station.

关 键 词：低压机组 变压器 连接组别 磁通 三次谐波电流 

分 类 号：TM41[电气工程—电器] TM645