Research And Application On Long-term Optimal Scheduling Of Cascaded Hydro Plant

This thesis reviews the achievements in the theory, method and application of long-term optimal operation of water resources systems, and discusses deeply the correlative methods to long-term optimal operation of hydro plant and reservoir associated with the project "Combined operation of QingJiang cascading hydropower system". It studies the optimization models and algorithms of long-term optimal operation of water resources systems. Based on the maximizing the power generation model and the features of hydro systems, it presents the maximizing the profit model, and analyzes the objective function and the strictions.It describes how to establish the dispatch regulation function and the regressive analysis methods. According to the characters of hydro system dispatching, it gives out the double variable for decision-making linear dispatching function, and then studies the methods of how to establish the function and how to decide the regulation function.According to the facts of the QingJiang cascading hydropower system, it offers three dispatching projects: conventional dispatching, optimal dispatching and dispatching function for simulating calculation. With the maximizing the power generation model, it describes in detail the POA algorithm, and chooses the results of conventional dispatching as the started sequence.It compares and analyses the simulating dispatching results of the three dispatching projects each, and discusses the features and differences of each dispatching project. It analyses the application effect of two different objective function models, the results has some referenced values. It attains better results when computing with the double variable for decision-making linear dispatching function. In the end, it summaries the work and gives the directions in the further research.