Water abandonment control of Xijin cascade hydropower stations in flood season based on hedging rules
Hydropower stations often create a lot of abandoned water due to the influence of inflow and regulation of hydropower stations during flood season,which reduces the comprehensive benefit of hydropower stations in the later stage.In order to reduce water abandonment and increase the benefit of water storage,taking Xijin cascade hydropower stations in Yujiang River basin of Guangxi Province as an example,this paper proposes three types of time-varying parameter water abandonment hedging rules on the basis of previous researches.At the same time,a multi-objective optimal operation model that takes both water abandonment and power generation into account is constructed to solve the hedging rule parameters in each period.The rules of water abandonment in Xijin cascade hydropower stations in rainy,normal and dry years are analyzed,and the optimal rules of water abandonment and power generation during flood season are obtained.The results show that hedging rule 1 has a good effect on increasing the generation capacity of cascade power stations and reducing water abandonment of cascade hydropower stations in rainy,normal and dry years,whereas hedging rule 2 has the worst effect,and hedging rule 3 has the intermediate effect.Therefore,hedging rule 1 should be chosen as Xijin cascade hydropower station water abandonment control rule in flood season to better balance the power generation benefit and reduce water abandonment,so as to maximize the benefit.
water abandonment control in flood seasonhedging rulemulti-objective optimizationXijin cascade hydropower stations
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