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向家坝水电站是金沙江下游河段水电开发的最下游梯级,为多目标综合利用工程,工程开发任务以发电为主,同时改善通航条件,兼顾防洪、灌溉,并具有对溪洛渡水电站进行反调节等作用。工程建成后,与其上下游梯级联合统一调度,可充分发挥其在发电、航运、防洪、灌溉等方面的综合利用效益。发电方面,电站全厂最大容量6400MW,主要供电华东电网,枯水期兼顾四川电网需要。航运方面,库区规划为Ⅳ级航道,坝下至宜宾河段规划为Ⅲ级航道,工程建有一级垂直升船机,以满足船舶的过坝要求。
Xiangjiaba Hydropower Station is the most downstream rung of hydropower development in the lower reaches of the Jinsha River. It is a multi-objective comprehensive utilization project. The project development task is mainly power generation while improving navigation conditions, taking into account flood control and irrigation, and anti-regulation of Xiluodu Hydropower Station And so on. After the completion of the project, unification with its upstream and downstream cascades can give full play to its comprehensive utilization efficiency in power generation, shipping, flood control and irrigation. In terms of power generation, the maximum capacity of power plants is 6,400MW, mainly supplying power to East China Power Grid and taking into consideration the need of Sichuan Power Grid during the dry season. In terms of shipping, the reservoir area is planned to be a Grade IV waterway and the dam to the Yibin River is planned to be a grade III waterway. The project has a one-stage vertical shiplift to meet the ship’s dam crossing requirements.