Design And Implementation Of Optimal Scheduling Method For Daily Regulation Cascade Reservoir

With the comprehensive development of hydropower energy in China,the joint optimal operation of cascade reservoirs has become an important research content in the field of reservoir operation.However,due to the surface factors such as small reservoir capacity and poor regulation capacity,the research on joint optimal scheduling of daily regulation cascade hydropower station has been neglected for a long time,and the potential and considerable benefits of cascade dispatching have been lost.At the same time,considering that the reservoir management of hydropower enterprises has gradually realized centralization and information automation,this paper selects the three-stage daily regulation cascade hydropower stations in Fujian Futunxi watershed as the research object,designs a joint optimal scheduling method suitable for daily regulation cascade hydropower stations,researches and develops the corresponding optimal dispatching system,in order to solve the problem of research on the optimal dispatching of cascade hydropower stations with daily regulation.This paper mainly studies three aspects: the method selection of optimal dispatching of daily regulation cascade hydropower stations,the calculation of daily regulation cascade joint optimal dispatching and the implementation of optimal dispatching systems for daily regulation cascade.(1)According to the dispatching characteristics of daily regulation cascade hydropower stations,this paper compares and analyzes the common intelligent optimization algorithm(including traditional mathematical method and modern heuristic algorithm)based on mathematical theory and the physical cause analysis algorithm based on the principle of hydrology,and selects and proposes a physical cause analysis algorithm of output water level,which is suitable for the short-term optimal dispatching of daily regulation cascade.On this basis,the objective function for maximizing the cascade power generation of daily regulation hydropower station is determined,and the problem of short-term optimal operation of daily regulation cascade hydropower stations with monotony and synchronism is solved.(2)Considering all kinds of restriction conditions and influence factors of daily regulation cascade hydropower stations,combined with the physical cause analysis algorithm of output-water level based on the principle of hydrology,a nomograph of multi-element daily regulation reservoir cascade joint optimal operation is designed,and realizing the optimal operation calculation of daily regulation cascade based on the nomograph of multi-element.The specific calculation steps include identifying the key factors of scheduling,determining hydraulic lag time,analyzing interval flow,calculating dispatching output and correcting calculation errors,etc.The calculation results can comprehensively consider the average water level in front of the dam,the average tail water level and the average output of the power station in the previous period of the upper reservoir,and refer to the current water level in front of the dam and the tail water level of the reservoir,which has scientific guiding significance for the joint operation calculation of the daily regulating cascade reservoir.(3)A joint optimal dispatching system of daily regulation cascade hydropower stations is researched and developed,which integrates generation dispatching and operation management.Based on the improved physical cause analysis algorithm of output-water level and the nomograph of joint optimization scheduling,the system adopts the B / s and C / S mixed structure and software layered design mode,and designs the overall architecture,application database and functional modules.The system has been implemented and applied to the research object of this paper—Yangkou,Xiayang and Zhaokou daily regulation cascade hydropower stations,which effectively improves the management efficiency and economic benefits of hydropower station operation.