水库水沙联合优化调度模型与评价方法研究

发布时间：2019-04-21 21:13

【摘要】：本文首先在建立防洪、兴利、生态以及排沙减淤多目标优化调度模型基础上,针对水库水沙联合优化存在的矛盾,将其简化为以发电量最大、泥沙淤积量最小两目标优化问题,并提出基于改进多目标动态规划迭代算法的求解方法,避免了多次采用一维泥沙数学模型迭代计算的缺点,可快速生成模型的非劣解集；其次,针对水库水沙联合优化调度方案评价的复杂性及单一评价方法存在的局限性,以向量夹角和最小为目标,提出了基于向量夹角和最小的组合赋权方法与评价方法；最后,将模型和方法应用于三峡水库的实例验证,结果表明：改进的多目标动态规划迭代算法可实现发电量和泥沙淤积计算的有机结合,获取水库水沙联合优化调度模型的非劣解集,同时验证了基于向量夹角和最小的组合赋权方法与评价方法的有效性。为水库水沙联合优化调度及评价理论的研究提供了理论参考。
[Abstract]:In this paper, on the basis of establishing multi-objective optimal operation model of flood control, profit-bearing, ecology and sediment reduction, aiming at the contradiction existing in the joint optimization of reservoir water and sediment, this paper simplifies it to the two-objective optimization problem of maximum power generation and minimum sediment deposition. The solution method based on the improved multi-objective dynamic programming iterative algorithm is proposed, which avoids the disadvantage of iterative calculation of one-dimensional sediment mathematical model, and can quickly generate the non-inferior solution set of the model. Secondly, aiming at the complexity of the evaluation of the combined optimal operation scheme of reservoir water and sediment and the limitation of the single evaluation method, a combination weighting method and evaluation method based on vector angle and minimum is put forward for the purpose of vector angle and minimum. Finally, the model and method are applied to the case study of the three Gorges Reservoir. The results show that the improved iterative algorithm of multi-objective dynamic programming can realize the organic combination of electricity generation and sediment deposition calculation. The non-inferior solution set of the combined optimal operation model of reservoir water and sediment is obtained, and the effectiveness of the combined weighting method and the evaluation method based on vector angle and minimum is verified at the same time. It provides a theoretical reference for the study of combined optimal operation and evaluation theory of reservoir water and sediment.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TV697.1

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