Research Of Co-scheduling Of The Three Gorges Dam And Gezhouba Dam Based On Evolution Algorithm And Meteorological Information

With the rapidly development of the Chinese economy, in recent years, the ships quantity of the Yangtze River and the tributaries is increasing. The river traffic pressure increases day by day, especially Gezhouba dam and Three Gorges dam play a more and more important role. After the two dams begun the unified ship scheduling, the two dams were seen as an organic system and "whole unified scheduling, joint operating". On the basis of the previous research on the joint navigation scheduling of the two dams, this thesis further study the influence of the meteorological information on the scheduling plan, and further improve the existing two dam joint navigation scheduling model. Firstly, the meteorological and ship stopping mathematical model is established. By referring to the meteorological modeling method of other research, a time and space two-dimensional normal distribution probability function is used in this thesis to express the meteorological information. After that, a single ship stopping time calculating model considering the meteorological information is established, through which a single ship's meteorological information influenced stopping time value can be calculated. Secondly, the two dam co-scheduling problem is researched and a multi-objective mathematical model is established: simultaneously considering the maximization of chamber area utilization and minimization ship waiting time, and the two dams co-scheduling problem is integrated as a multi objective programming problem. At last, the original SPEA2 is improved: improving the environment selection strategy, joining the local search strategy, improving the external population update strategy based on the k-th individual Euclidean distance. In order to research the influence of meteorological information in the two dam scheduling problem and the effectiveness of the ISPEA2 algorithm's improvements, a scheduling cycle's ships reporting information is randomly selected, and the ISPEA2 is used in the final simulation calculations.The influence of meteorological information on the two dams co-scheduling problem, and the effectiveness of the improvement strategies in ISPEA2 are researched in the simulation section. The results show that the weather model can reflect the impact of the weather on the two dam scheduling problem, and the ISPEA2 can get reasonable scheduling plan. Through the comparison of the calculation results of each algorithm, the improvements in ISPEA2 can obviously improve the calculation results, and the solution to this problem is feasible and effective. A calculation example is added to study the effect of chamber scheduling algorithm to the two dam scheduling problem. Through two chamber scheduling algorithm calculation results' comparison, it shows that chamber scheduling algorithm has a great influence on the two dams scheduling problem.