Study On Optimal Dispatch Of Power Generation And Shipping Of Cascade Hydropower Stations On The Lower Jinsha River

Hydropower as a clean energy sustainable development and low price,its efficient use can alleviate the load of power system pressure maintaining power system safe running.Water conservancy construction in our country developing fast and large water conservancy hub for multi-objective optimal operation pattern forms gradually,under the trend of how to balance the contradiction between the different dispatching of cascade hydropower stations goals give full play to the large water conservancy irrigation power generation capacity,the short-term optimal dispatching of cascade hydropower stations is the difficulty.In order to improve the comprehensive benefit of cascade hydropower stations,alleviate the contradiction between the dispatching of cascade hydropower stations target,based on the lower reaches of the Jinsha river Xiluodu-Xiangjiaba cascade power station as the research object,and around the water power goal of cascade hydropower stations and shipping target,carry out power shipping multi-objective short-term optimal scheduling of cascade hydropower stations,the main work and results are as follows:(1)Study the impact of the unsteady flow generated by the Xiangjiaba Power Station’s peak regulation operation during the dry season on the downstream navigation,analyze the hydraulic factors affecting the downstream navigation of Xiangjiaba,and propose the hydraulic boundary conditions suitable for the safe navigation of the downstream channel of Xiangjiaba,then establish the evaluation function of the shipping benefit of Xiangjiaba downstream as the objective function of shipping scheduling.Further,in order to improve the overall efficiency of Xiluodu-Xianjiaba cascade power stations,comprehensive consideration should be given to cascade power plant power dispatch and shipping dispatch.For Xiluodu-Xianjiaba cascade power plants,a multi-objective short-term optimal power dispatch dispatch should be established during dry seasons and taking into account the downstream shipping requirements of Xiangjiaba model.(2)In view of the shortcomings of the ant colony optimization during the optimization process,the initial population is slow,the local optimal solution is easy to fall into,and the calculation accuracy is poor,the genetic algorithm is used to generate the better population as the input of the ant colony,reducing its initial stage calculate time and complexity,and use genetic operations(selection,crossover,mutation)to increase the diversity of the population after the ant colony optimization forms a complete path.An improved multiobjective ant colony optimization based on genetic algorithm is proposed to solve cascade power plant power generation Shipping multi-objective short-term optimal scheduling model provides effective algorithm support.(3)Coding the operation level of the reservoir,using GA-ACO algorithm to solve the multi-objective short-term optimal scheduling problem of brook-direction cascade,taking into account the power generation benefit of cascade power station and the downstream shipping benefit of Xiangjiaba,consider Xiluodu power station,the special operation requirements of “two stations and two transfers in the library”,the short-term power generation plan of the cascade power station was formulated.The results show that the improved algorithm overcomes the disadvantage of slow calculation speed in the early stage and easy to fall into local convergence in the later stage,greatly improves the accuracy of short-term power generation plan,and can effectively relieve the shipping pressure downstream of the home dam.