梯级水库防洪库容分配策略研究

Abstract

针对梯级水库防洪任务和边界条件发生的变化，建立了一种确定梯级水库防洪库容分配的数学模型，耦合水库电力调度优化、防洪效益优化等多种目标，把梯级水库预留的防洪库容最小作为约束条件，采用逐次优化算法求解出使梯级水库发电效益最大的非劣解集。以清江干流梯级水库为例，确定水布垭和隔河岩水库防洪库容的最优分配策略。在水布垭预留5亿m3和隔河岩预留不小于1.5亿m3防洪库容的前提下，若发生100年一遇的洪水时，隔河岩水库的最高调洪水位不会超过200 m，可以满足防洪安全。该研究为梯级水库防洪库容分配提供了一种新的探讨思路。 Due to the changes of flood control task and boundary condition of cascade reservoirs, a mathematical model was established to allocate cascade reservoir flood prevention storage. Coupled hydropower generation with flood control operation objections, progressive optimality algorithm was used to obtain Pareto non-inferior solutions of maximum hydropower generation under the minimum flood prevention storage constrains for cascade reservoirs. The Qingjiang basin was selected as case study, the optimal storage allocation strategy for the Shuibuya and Geheyan reservoirs was given. If the Shuibuya reservoir keeps 500 million m3 and Geheyan reservoir remains not less than 150 million m3 flood prevention storages, the maximum regulation water level of the Geheyan reservoir will not over 200mwhen 100-year flood occurs, which can assurance flood control safety. The proposed method might provide a new approach for cascade reservoir storage allocation.