Research On Optimal Scheduling Of Reservoirs Considering The Risk Of Water Abandonment And System Design

As a technological maturity and renewable energy,hydropower energy has achieved comprehensive and rapid development.With the development of hydropower energy,rational allocation of water resources and optimization of reservoir group operation and dispatch management have gradually become the research focus.However,due to the uncertainty of reservoir inflow runoff,the excessive concentration of hydropower development,but progress lag of grid-connected projects,and the intermittent new energy like wind power and solar energy combined to the grid,hydropower systems are facing huge peaking pressure and problem of water abandonment.To this end,the research work focuses on peaking shave and water abandonment in hydropower stations,in-depth research on the calculation of water abandonment risks in hydropower stations,the control of water level process corresponding to different water abandonment risks,the optimal operation of hydropower stations considering the risk of water abandonment,and the service-oriented design of economic dispatching system to improve the management level of hydropower station operation and dispatching.The main work contents and research results of the thesis are as follows:(1)In light of the water abandonment risk control problem of hydropower station power generationt,based on the analysis of the runoff frequency of hydropower station,a practical method for calculating the risk of abandonment water based on the frequency of runoff of hydropower station is proposed.Taking the Ertan Hydropower Station as an example,the water level control process corresponding to the different water abandonment risk under the control of the water level,the limit water level and the water level control is proposed,and the water level control is applied to the dispatching map scheduling.The typical annual warehousing simulation scheduling results show that the abandoned water risk control method practical and effective,it can provide guidance for the risk control of water abandonment in the actual dispatching process of hydropower stations(2)Aiming at reducing the risk of water abandonment in hydropower station group peaking dispatching,the model of peak regulation of hydropower station group considering the risk of water abandonment is established,and the strategy of coordinating the electricity distribution among hydropower stations based on the risk of water abandonment is proposed,and the heuristic continuous load shedding algorithm is used to solve the model.Taking Qingjiang cascade and the Danjiangkou hydropower station in Hubei Power Grid as an example,the power distribution strategy is used to distribute the peaking power of each power station and peaking shave in regional power grid.The example results show that the proposed method and strategy can effectively reduce the overall risk of water abandonment of the system and the peaking efficiency of the hydropower station group provide reference for the peaking and abandonment control of the regional power grid hydropower station group;(3)Nowadays,different application systems of hydropower stations mainly provided by different manufacturers,and the operating environment and programming language of different application systems are different,information sharing and interoperating would be a big problem.To figure out the problems,the economic dispatching needs of hydropower stations are analyzed and object-oriented abstract modeling is proposed.Taking the integrates of Qingjiang cascade economic dispatch control system as an example,adopting a service-oriented system design method to design the services of economic dispatch control system.Providing a new idea for integrated design of hydropower station dispatching application system service.