汉江上游梯级水电站水库优化运行研究

摘要

Based on the characteristics and tasks of the cascade hydropower station reservoir groups of Shiquan, Xihe and Ankang in the upper reaches of the Hanjiang River, two optimal models with the objective functions of maximum power generation and the maximum power generation benefits are established respectively. The solution to the models is obtained via the combination of successive approximation method of dynamic programming ( DPSA) and progressive optimal algorithm ( POA) , whereby the long-series optimal operation results of the cascade hydropower stations are obtained. The results indicate that the optimal operation of the cascade hydropower station reservoir gourps can bring the compensation effect of reservoirs into full play and obtain the greater benefits in comparison with the conventional operation of the cascade reservoir groups and the single reservoir optimal operation. The results of maximum power generation benefit model are better than the results of the maximum power generation model, which the power generation benefits of the cascade hydropower stations and the outputs in the dry season increase , and the load distribution of hydropower stations are regulated, and the abandoned water decrease, and the utilization efficiency of water resource is improved. Accordingly, the research results can provide the gheoretical basis and technical support for the optimal operation of the cascade hydropower stations in the upper reaches of the Hanjiang River.%根据汉江上游石泉、喜河、安康梯级水电站水库群的特点和任务,分别以梯级水电站发电量最大和发电效益最大为目标函数建立优化模型,将逐次逼近动态规划法(DPSA)与逐步优化算法(POA)相结合求解模型,获得梯级水电站长系列优化运行结果.结果表明,梯级水电站水库群优化运行能够充分发挥水库的补偿作用,相比梯级水库群常规调度和单一水库优化运行获得更大的效益;与发电量最大模型相比,发电效益最大模型增加了梯级水电站的发电效益和枯水期出力,调整了水电站的负荷分配,减少了水电站弃水,提高了水资源利用率.研究成果为汉江上游梯级水电站的优化运行提供了理论依据和技术支持.