Cascade reservoir hydro-fluctuation period operation water level cooperative scheduling method and device

Abstract

The invention provides a cascade reservoir hydro-fluctuation period operation water level cooperative scheduling method and device. The method comprises the steps that 1, a reservoir hydro-fluctuation period is divided into a dry season, a transition period and a pre-flood hydro-fluctuation period; step 2, constructing a reservoir multi-stage water supply objective function adapted to the flow seasonal characteristics of the hydro-fluctuation period, and deducing a cascade reservoir hydro-fluctuation period operation water level cooperative scheduling scheme set by taking the reservoir discharge flow as a decision variable and a bionic evolutionary algorithm as a solving algorithm; step 3, respectively simulating upstream backwater area sediment erosion and deposition change, downstream water pollution diffusion and downstream flood routing processes of stage-by-stage water level elimination and falling scheduling of the reservoirs by adopting a hydrodynamic method for each cascade reservoir; and 4, optimizing a reservoir dispatching scheme by taking the maximum generating capacity, the water supply outside the river channel, the silt reduction amount, the pollution displacement distance, the water level rising amplitude, the water level daily rising rate, the minimum flood control risk, the pollution influence time and the pollution group concentration as evaluation indexes and taking a combined distance evaluation method as a decision-making method.

Description

technical field [0001] The invention belongs to the technical field of reservoir dispatching, and in particular relates to a method and device for coordinated dispatching of operating water levels during the drawdown period of cascade reservoirs. Background technique [0002] The operation water level regulation during the drawdown period of the reservoir is oriented to multiple water resources utilization needs, involving normalized regulation of power generation, flood control, water supply, shipping, etc., as well as abnormal and emergency scheduling such as sediment reduction, environmental and ecological protection, etc. The research on operation water level regulation during the drawdown period of reservoirs started relatively late. From the perspective of reservoir scale, single reservoir regulation and multi-year regulation of reservoir drawdown water level control at the end of the year are the mainstays; from the perspective of regulation objectives, the use of casc...

AI Technical Summary

Problems solved by technology

The research on operation water level regulation during the drawdown period of reservoirs started relatively late. From the perspective of reservoir scale, single reservoir regulation and multi-year regulation of reservoir drawdown water level control at the end of the year are the mainstays; from the perspective of regulation objectives, the use of cascade reservoir drawdown focuses on consideration of drawdown From the perspective of the step length of the dispatch period, because the stages of the fading period are not clear, most studies use months or ten days as the dispatch period step length, and there are very few long-term and short-term nested dispatches. Multi-objective fusion - long-term and short-term nesting" reservoir scheduling method

The technical difficulties and challenges of coordinated operation of water levels during the drawdown period of the reservoir include: ① affected by the mutual feedback of cascade reservoir regulation, the stages of the drawdown period are unknown, and it is difficult to characterize the seasonal characteristics of the extreme flow; ② construct a flow season suitable for the drawdown period It is very difficult to realize the multi-level water supply scheduling with unique characteristics and realize the multi-objective integration of routine, non-routine and emergency scheduling; ③It is very challenging to realize the nested scheduling of medium and long-term runoff forecasting, short-term flood forecasting and reservoir drawdown

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