岷江老木孔航电枢纽初期蓄水位多目标决策优化

Multi-objective decision-making and optimization of initial water storage level at the Minjiang Laomukong navigation and hydro-power junction hub

岷江老木孔航电枢纽初步设计设定的初期蓄水位为358 m,客观分析其不足。利用多目标决策原理,对施工期围堰挡水试通航、初期发电的蓄水位进行优化研究,提出一种系统的简化算法。简化算法获得的研究结论为:1)优化的蓄水位比初步设计降低7.28 m(初期1台机组发电)、提前发电工期21.6 d,相对效益显著。2)能发挥降低二期二段围堰运行风险、节约建设总工期等诸多溢出效应。3)还扩展获得了初期2台机组发电时的最优蓄水位等成果。

The initial water level of the Minjiang Laomukong navigation and hydro-power junction is 358 m in the preliminary design,and this paper objectively analyzes its shortcomings.Based on the principle of multi-objective decision,the optimization of the water storage level of cofferdam during the construction period for water retaining trial navigation and the initial power generation is studied,and a systematic simplified algorithm is proposed.The research conclusions obtained by the simplified algorithm are as follows:1)The optimized water storage level is 7.28 m lower than the preliminary design(one unit is used for power generation in the initial stage),and the power generation period is 21.6 d ahead of schedule,with significant relative benefits.2)It can reduce the operation risk of the second section cofferdam in Phase II,save the total construction period and other spillover effects.3)It also expands and obtains the results such as the optimal storage level when two units generate power in the initial stage.