雅砻江中下游梯级中长期联合优化调度消落水位分析  

Exploration for Drawdown Water Levels of Mid-long Term Optimal Operation of the Cascade Hydropower Plants in the Middle and Lower Reaches of the Yalong River

作　　者：黄光伦 HUANG Guang-lun(Yalong River Hydropower Development Company,Ltd,Chengdu 610051,Sichuan Province,China)

机构地区：[1]雅砻江流域水电开发有限公司,四川成都610051

出　　处：《中国农村水利水电》2025年第2期81-87,96,共8页China Rural Water and Hydropower

摘　　要：梯级水库消落水位是影响梯级水电站发电量的重要因素。随着具有多年调节性能的两河口水库的建成投运,确定两河口水库和下游锦屏一级、二滩水库联合调度的消落水位,提高雅砻江梯级发电量有待进一步研究。以梯级水电站发电量最大为目标,构建了雅砻江中下游梯级水电站联合优化调度模型,采用动态规划—逐步优化算法(DPPOA)进行求解,统计两河口、锦屏一级和二滩水电站消落水位、径流量和发电量信息,并采用K-means聚类算法开展梯级水电站中长期优化调度下消落水位与径流量、发电量之间的相关关系分析。研究结果表明:(1)相较梯级水电站常规调度多年平均发电量,联合优化调度可增加91.08亿kWh发电量(对应增幅为9.36%),且锦屏二级水电站作为高水头的水电站,增发电量更为明显;(2)对于大部分来水年份下,联合优化调度下两河口、锦屏一级和二滩水电站消落水位分别为2 800,1 825和1 175 m,相较常规调度,可增加40.43亿kWh发电量,对应发电量增幅为4.16%;(3)梯级水电站发电量与径流量呈现正相关关系,上游两河口水电站消落水位与入库径流量呈现负相关关系,而受上游电站径流调节影响,下游二滩水电站消落水位与径流量相关关系较弱。研究成果可为雅砻江中下游梯级联合调度和消落水位控制提供参考依据。The drawdown water levels of cascade reservoirs is one of the important factor affecting hydropower generation.With the construction of the Lianghekou Reservoir with multi-year regulation capacity,determining the drawdown water levels of the Lianghekou Reservoir,and the downstream JinpingⅠand Ertan hydropower stations to increase hydropower generation of cascade hydropower plants in the Yalong River needs further research.This study established a joint optimal operation model for the maximum hydropower generation of the cascade hydropower plants in the middle and lower reaches of the Yalong River.The dynamic programming-progressive optimality algorithm(DP-POA)was implemented to obtain the drawdown water levels,annual runoff and hydropower generation.The K-means clustering algorithm was employed to analyze the relationships between drawdown water levels,and annual runoff and hydropower generation under the medium and long-term optimal operation of cascade hydropower plants.The results showed that:①Compared with the average power generation of cascade hydropower plants under conventional dispatching,joint optimal operation could improve hydropower generation by 9.108 billion kWh(the corresponding increase rate of 9.36%)with more significant increase in hydropower generation of the Jinping hydropower plantⅡ;②For most inflow scenarios,the drawdown water levels of the Lianghekou,JinpingⅠand Ertan hydropower plants under joint optimal operation are 2800,1825 and 1175 m,respectively,which could increase the hydropower generation by 4.043 billion kWh with corresponding increase rate of 4.16%,as compared to the conventional operation;③There is a positive correlation between the hydropower generation and the annual runoff and a negative correlation between the drawdown water level and the inflow runoff was found in the Lianghekou hydropower plant.While due to the influence of the runoff regulation of the upstream hydropower plants,the correlation between the drawdown water level and the runoff of the downstream

关 键 词：雅砻江中下游梯级 联合优化调度 动态规划—逐步优化算法 K-MEANS聚类算法 

分 类 号：TV697[水利工程—水利水电工程]