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沅水流域梯级电站优化运行方式与效益分析 总被引:1,自引:1,他引:1
分析了当前丰枯、峰谷电价条件下沅水流域梯级电站联合调度方案以及优化运行产生的效益,提出了三板溪、托口、五强溪等调节能力较强的水库的水位控制方案,得出了相应的发电量和发电收入过程。同时分析了在优化运行情况下沅水全流域梯级电站对提高下游防洪能力所起的作用以及增加的发电效益。研究结果对沅水流域水库联合调度和水资源利用具有指导意义。 相似文献
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提出了供水期适当加大多年调节水库特别是流域龙头水库的消落水位、充分发挥流域梯级电站调峰效益的超常规调度思路,建立了超常规调度模型,并结合沅水流域三板溪及下游梯级电站的实况进行分析。结果表明,该模型可以产生较大的发电效益和社会效益。最后还分析了三板溪对下游梯级电站的补偿效益。 相似文献
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沅水流域径流周期性规律分析 总被引:2,自引:1,他引:1
根据滤波相关理论对沅水流域径流序列的突变性、跳跃性和趋势性进行了分析,并根据熵谱图法原理提出了寻求径流系列近似周期及检验方法,以沅水流域近81 a径流序列资料为例,分析了周期性规律,得出了对序列影响最大的周期分别为16.7、5 a的结论.研究结果对沅水流域水库联合调度和水资源利用具有较强的指导意义. 相似文献
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针对金沙江下游梯级水库的相继建成将会改变长江流域梯级水库综合调度格局问题,构建了金沙江下游梯级水库与三峡梯级水库联合发电调度模型,并采用逐次优化算法进行了求解.结果表明,采用联合优化调度后整个梯级发电效益明显,与原设计方案相比梯级平均发电量可增加6.29;与各梯级单独优化运行相比,梯级发电量可增加1.48%. 相似文献
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介绍了黄河上游梯级水电站的运行情况,论述了黄河上游工农业用水、宁夏和内蒙河段的防凌要求以及灌溉期间灌渠取水等综合利用的需求,分析了原有梯级水库的运行方式,提出了满足综合利用对水库下泄要求的黄河上游梯级水库短期运行的方式、方法. 相似文献
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介绍了黄河上游梯级水电站的运行情况,论述了黄河上游工农业用水、宁夏和内蒙河段的防凌要求以及灌溉期间灌渠取水等综合利用的需求,分析了原有梯级水库的运行方式,提出了满足综合利用对水库下泄要求的黄河上游梯级水库短期运行的方式、方法。 相似文献
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In the present paper, computational fluid dynamics (CFD) simulations were executed to exploring the intent of using aspirated cascade to replace tandem cascades. Firstly, the ONERA tandem cascades were investigated, and the performance of the cascades at the design point were listed, such as diffusion factor, total pressure loss coeffi- cient, deviation angle etc. For replacing the ONERA tandem cascades, a new cascade was designed with the codes BLADEGEN developed by the authors. The quasi 3-D calculations were carried out using the collection of programs for cascade analysis and design, MISES. The cascade was analyzed and designed by using this code. And the cascade was simulated and analyzed by commercial CFD software. It is found there is an obvious separa- tion on the suction side. Based on the 3D CFD simulation results of the cascade without aspiration, an aspirated cascade was designed by introducing a slot on the suction side. The performance of the aspirated cascade was in- vestigated and compared with the tandem cascades, indicated that under the same inlet condition, the total pres- sure loss of the single row aspirated cascade was less than that of the tandem cascades, and the outlet static pres- sure is higher than that of the tandem cascades. Meanwhile, the different suction slot location, suction width and suction mass flow are studied for the aspirated cascade. 相似文献
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