Study On Optimizing Operation And Business Strategy Of Cascade Hydropower Stations

With the example of Shuoduogang River in Yunnan Province, this dissertation focuses on running characteristic of cascade hydropower stations and electric power system, power station dynamical characteristics, hydrological prediction, long-time optimizing schedule, seeking optimization algorithm and models of short-time operation, the modes of connection and game pay-off, systematically and roundly researches the problems of optimizing schedule of cascade hydropower stations and their operation strategy in electric power market. A series of outcomes is obtained and the main is as follows:1.The problems of optimal operation and management strategy of the cascade hydropower stations in the power market are systemically studied, using a new optimization algorithm and with many factors taken into account, such as hydrometeorological conditions of the drainage area, stabilization of the hydraulic buildings, factors of the electrical equipments, safety of the whole network, requirements of the power market and so on. The results gained in this paper will have very practical significance and application value to other hydro projects and power plant.2. The long-term optimal operation of the cascade hydropower stations is studied, including the simulation and forecasting of the runoff sequence, the analysis of the compensation profit of the tap reservoir, the analysis of the risk benefit of dynamic limiting level in flood period and the operation pattern of the cascade hydropower stations. It will provide the theoretical method and programs of the long-term operation decision-making of cascade hydropower stations to the operational personnel.3. The short-term optimal operation of the cascade hydropower stations is studied, with particle swarm optimization firstly used in the short-term optimal operation of hydropower stations. The results shows that the particle swarm optimization is very applicable to the field of optimal operation of hydropower stations and the particle swarm optimization provides a new way of solving the optimal operation models.4.Aiming at the characteristics of short-term optimal dispatching of cascaded hydropower stations, bidding strategies for cascaded hydropower stations in electricity market are put forward. Optimal bidding & operation mode for cascaded hydropower stations in competitive power market is constructed, which is staged and concludes maximum generation model, minimum system generation cost model andmaximum profit model in succession. Scheduling and market clearing price Optimized accords with real situation. This dissertation constructed a real-time operation model for cascaded hydropower stations in electricity market. A new bidding mode and market clearing price simulation is also advanced. They exhibit specialties and advantages in compared with the compute of monthly market clearing price in Huazhong grid.At last, this dissertation makes a conclusion and expectation. Scientific system of optimal operation and management for cascaded hydropower stations is formed.