Research On Long-term Optimal Dispatching Of Cascaded Hydropower Stations

Taking the cascaded hydropower stations in Shuoduogang River as an example,this paper is concerned with the research on theory, methods, and applications oflong-term optimal dispatching of cascaded hydropower stations. The major work ofthis dissertation is outlined as following:(1) Firstly, this paper introduces the possibility of the research on long-termoptimal dispatching of cascaded hydropower stations. Secondly, it reviews the pastachievements in the theory, methods and applications of long-term optimaldispatching of cascaded hydropower stations. Especially introduces dynamicprogramming as a key. Thirdly, it analyses the advantage and disadvantage of thesemethods. At last, it tries to predict probable development in the future.(2) This paper summarizes the present condition of the domestic andinternational research of the mid and long term hydrological forecast and forecastmeans. Based on this, it puts forward the research method (seasonal level model andautoregressive model) according to the characteristic of the river basin and the statusof the hydrological data. Then it forecasts the inflow of Xiaozhongdian.(3)According to the optimal principle of dynamic programming and combinedwith the requirement of long-term optimal dispatching of cascaded hydropowerstations, this paper constructs the long-term optimal dispatching model of cascadedhydropower stations. This model pursues the maximal electric power and uses thegeneration power flow as the decision.(4)This paper analyses the inflow data of Xiaozhongdian and selects somesample of hydrology data, then uses the hydrology data in the annual dynamicprogramming model computing. The result indicates that we attain more electricpower than conventional method.