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乐昌峡水库汛末提前蓄水优化调度研究
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Abstract:
乐昌峡水库原设计从10月1日开始蓄水，导致水库蓄满率很低。本文根据水库蓄水调度控制线，计算蓄水期分期设计洪水和防洪控制水位，建立多目标水库优化蓄水调度模型，并采用NSGA-II算法求解。结果表明：在防洪限制水位的约束下，蓄水时间越提前，水库的综合利用效益越大。与原设计方案相比，8月1日和9月1日起蓄方案蓄水期发电量分别提高了21.62%和13.49%，蓄满率分别提高了10.40%和9.96%，多年平均蓄水量分别增加了4979和3647万m3。在确保防洪安全的前提下确定关键时间节点及对应水位，可为提前蓄水调度提供技术参考。
The designed impoundment scheme of Lechang reservoir was started in October 1, which results in a low impoundment efficiency. In this study, the seasonal design floods and flood control limited water level during the impounding period were calculated. Based on the reservoir impoundment operation lines, a multi-objective operation model was established and solved by the NSGA-II algorithm. Compared with the designed impoundment scheme, the advance impoundment scheme for August 1 (or September 1) can increase 21.62% (or 13.49%) power generation, 10.40% (or 9.96%) total impoundment efficiency, and 4979 (or 3647) million m3 water resources, respectively. Determining key time nodes and corresponding water levels can provide technical reference for advance impoundment operation on the premise of ensuring flood control safety.
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