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考虑水流时滞的梯级水电站水库群短期发电优化调度.
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华北电力大学可再生能源学院

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国家自然科学基金(51709105);中央高校基本科研业务费专项资金资助(2019MS031);“十三五”国家重点研发计划课题(2016YFC0402208)


Short-term Generation Optimization Dispatch of Cascade Hydropower Station Reservoirs Considering Time-lag of Water Flow
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North China Electric Power University

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    摘要:

    在梯级水电站水库群短期发电优化调度过程中,通常忽略或简化上下级水库之间水流时滞的影响,将上级水库出库流量直接作为下级水库的入库流量,当两库之间距离足够大时,就会降低短期发电优化调度方案的制作精度。为了规避水流时滞的影响,基于线性空间原理,建立了上级水库的出库流量、区间入流、下库水位所构成的空间与下级水库的入库流量空间的映射函数,并综合应用数据挖掘中的人工神经网络、Kmeans和Relief方法对其进行求解,构建了考虑水流时滞的梯级水电站水库群短期发电优化调度模型。应用于雅砻江流域锦官电源组短期发电优化调度的算例分析表明,所建立的模型能够提高短期发电优化调度方案制作的精度,充分发挥水能资源利用效益,为实际调度工作提供了参考。

    Abstract:

    In the operation optimization of cascade hydropower reservoirs, it is a usually simplified way that neglecting time-lags of flow routing and regarding the upstream reservoir outflow as the downstream reservoir inflow, which have an impact on accuracy of operation scheme when time-lag is big enough. In order to reduce the effect of time-lags of flow routing, firstly, the relationship between upstream reservoir outflow, local inflow, downstream reservoir water level and downstream reservoir inflow is quantized based on the principle of linear space. Secondly, the artificial neural network, Kmeans and Relief methods in date mining are comprehensively applied to solve and determine the mapping relationship. And then, a short-term generation optimization model of cascade hydropower reservoirs considering time-lags of flow routing is established. Finally, to verify the feasibility and effectiveness of the model, it is applied to solve the operation optimization of cascade hydropower reservoirs in Yalong River, and the results show that the established model can considerably improve the accuracy of short-term optimal operation plan. So it can give full play to the utilization efficiency of water resources, and provide reference for actual operation.

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张验科,刘源,纪昌明,等.考虑水流时滞的梯级水电站水库群短期发电优化调度.[J/OL].电力系统自动化,http://doi.org/10.7500/AEPS20190411007.
ZHANG Yanke,LIU Yuan,JI Changming,et al.Short-term Generation Optimization Dispatch of Cascade Hydropower Station Reservoirs Considering Time-lag of Water Flow[J/OL].Automation of Electric Power Systems,http://doi.org/10.7500/AEPS20190411007.

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  • 收稿日期:2019-04-11
  • 最后修改日期:2019-10-31
  • 录用日期:2019-09-08
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