Cascade reservoir flood season operation water level dynamic control method based on time-varying design flood

Abstract

The invention belongs to the technical field of cascade reservoir flood period operation water level control, and particularly relates to a cascade reservoir flood period operation water level dynamiccontrol method based on time-varying design flood, which comprises the following steps of arranging sample data by taking date as abscissa and taking year as ordinate to carry out hyper-quantitativescreening; adopting two time-distortion parameters in a Poisson scale value process model with time-distortion parameters, wherein the two time-distortion parameters include the super-quantitative mean value and the super-quantitative generation intensity, and therefore deterministic factors and random factors in the actual inflow process of the reservoir are reflected; deducing the time-varying design flood of various design frequencies, and combining the date, the design frequency and the time-varying design flood value to form a time-varying warehousing flood recognition model to judge thedesign frequency and the line type of the warehousing flood; before entering the flood period, enabling the upstream reservoir to block and store the reservoir flood by lowering the flood period operation water level of the upstream reservoir to reduce the flood control pressure of the downstream reservoir, and enabling the downstream reservoir to increase the cascade reservoir power generation amount by exceeding the flood period limit water level operation.

Description

technical field [0001] The invention belongs to the technical field of cascade reservoir operating water level control in flood season, and in particular relates to a method for dynamically controlling the operating water level of cascade reservoirs in flood season based on time-varying design floods. Background technique [0002] At present, the shortage of water resources and frequent flood disasters have become common problems faced by all countries and regions in the world. Dynamically control the operating water level of cascade reservoirs during the flood season to convert floods that endanger human life and property into usable water resources. It is one of the effective ways for man and nature to live in harmony. The design flood is the key basis for formulating the operation plan of the reservoir. Whether it can fully reflect the actual water inflow of the reservoir is very important for the utilization of water resources in the reservoir. Scholars at home and abro...

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Problems solved by technology

[0005] (3) From the calculation method of the design flood process line, the same frequency method or the same multiple ratio method is often used in my country. Since these two methods require manual smoothing, the results are greatly affected by human factors, and the design flood process cannot be guaranteed. precision

[0009] At present, the research on the dynamic control method of cascade reservoir operating water level in flood season is mostly based on the annual maximum design flood or staged design flood. Dynamic control scheme of operating water level in flood season

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