一、基本情况1、工程情况二滩水电站位于中国西南部的四川省境内，距重要钢铁基地攀枝花市46公里。二滩水电站是四川省雅砻江干流上滚动开发的第一座水电站，电站装机容量330万千瓦（6×55万千瓦），年平均发电量170亿千瓦时。库容量58亿立方米，具有季调节能力，是川渝电网中 I. Basic Information 1. Project Ertan Hydropower Station is located in the territory of Sichuan Province in the southwest of China, 46 kilometers away from Panzhihua City, an important steel base. Ertan hydropower station is the first hydropower station rolling development on the mainstream of Yalong River in Sichuan Province. The installed capacity of power station is 3.3 million kilowatts (6 × 55 million kilowatts) with an average annual generating capacity of 17 billion kilowatt hours. The storage capacity of 5.8 billion cubic meters, with quarterly adjustment capacity, is in Sichuan and Chongqing power grids