In the system planning for single power supply network, it is one of basic tasks to calculate power flow of radial open-type electric power network. The work of power flow calculation is easier than that of closed-type electric power network. Generally, from four parameters of power and voltage at the start and the end terminals of transmission line, select two of them to get the other parameters. Based on different operation modes of Huangjin -Gorge Pumping Station & Hydropower Station, the sections of wire are determined preliminarily in the paper; the power and the voltage are calculated at each node of the network under different operation conditions; the modes of voltage tuning of main transformers is also determined.%辐射状的开式电网潮流计算是单一供电网络规划中的一个基本内容,较之回路闭合的闭式电网来说,潮流计算要简单.一般工程中常从输电线路始端、终端的功率、电压4个参数中选取其中2个参数求出其余参数.根据黄金峡电站、泵站的不同运行方式,初步确定的导线截面,对不同工况下系统网络各节点的功率、电压进行了的计算,确定了黄金峡泵站及电站主变压器的调压方式.
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