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在由“龙头”水库与若干日调节或无调节水电站组成的梯级水电中,枯水期末和汛期洪水间隔阶段,“龙头”水库根据下游电站区间来水情况,在正常发电流量外实施小流量泄流补偿,不仅可以提高“龙头”水库的防洪安全性、减少无益弃水,而且可以给下游电站提供更多的发电水量,改善机组的运行效率。文中建立了梯级水电站实时发电补偿调度风险分析模式,提出了梯级水电站实时补偿增益的计算方法、“龙头”水库不同补偿方案下风险的定量化方法以及基于期望增益最大的补偿方案选择方法。实例研究表明所提出的方法是合理、有效的,具有较好的辅助决策价值。
In the cascade hydropower composed of “faucet ” reservoirs and a number of day-regulated or unregulated hydropower stations, the “faucet ” reservoir is implemented outside the normal power generation flow according to the incoming water in the downstream power station interval at the end of the dry season and the flood interval in the flood season The small flow discharge compensation can not only improve the flood control safety of the “leading” reservoir and reduce the unwanted waste water, but also provide more downstream power plants with generating water and improve the operation efficiency of the unit. In this paper, the real-time power generation compensation scheduling risk analysis model for cascaded hydropower stations is established. The calculation methods of real-time compensation gains for cascaded hydropower stations, the quantification of risk under different compensation schemes and the selection of compensation schemes based on expected maximum gain are proposed. The case study shows that the proposed method is reasonable and effective and has a good value for decision-making.