Joint Optimal Operation And Risk Analysis Of Hydropower Station Reservoirs In Large River Basin

In recent years, with the vigorous development of hydropower policy implementation, hydropower cause obtains the rapid development, China has become the first power electricity and water. Especially, with the large units and the giant power station are put into operation, the safe and economic operation of hydropower plants and the optimal dispatching of large hydropower station reservoirs have been paying more attention by people. The joint optimal dispatching of hydropower station reservoirs in a large-scale basin is not only related to its own security and economic interests, but also related to the safe and economic operation of grid and flood control, shipping, water supply, and many other interests. At the same time, it complies with the requirement of building a resource-saving and environment-friendly society and is also an important way to achieve energy-saving and emission reduction targets. Focused on the joint optimal dispatching of hydropower station reservoirs in large basins and its automation system construction, this paper mainly studies the optimal dispatching model building, solution strategies and methods, the definition of optimal dispatching objectives, the impact on the grid and the automation system construction etc. The main results are as follows:(1) Reservoir operation management and reservoir operation automation system construction. Based on a comprehensive summary analysis of the status and achievement of China's reservoir operation management and an in-depth discussion on the development and management of China's hydropower station reservoirs and its automated scheduling techniques in grid, this paper points out the problems and deficiencies of reservoir operation management and reservoir operation automation system construction. And then it puts forward ideas and proposals to build new hydropower scheduling management system, strengthen the management of giant cascaded hydropower stations, speed up the construction of modern smart grid scheduling automation system, which will play a positive role in China's reservoir operation and its automation system construction and management.(2) Joint optimal operation Model study of large-scaled hydroelectric stations system. According to multi-objective and multi-constrained feature of hydroelectric station reservoirs joint optimal scheduling in the upper Yangtze river, according to overall system, local power grid and rivers cascade levels, under the premise of utilization requirements, long-term, medium-term and short-term joint operation models are established, and on the basis of traditional dynamic programming and its improved methods and modern intelligent bionic algorithm, the particle swarm optimization algorithm with self-adjusting parameters is proposed, providing important technical support for regional power grid and interconnected grid hydropower reservoirs joint optimal operation.(3) Method study of large-scale multi-constrained joint optimization model. According to high dimensional, dynamic and nonlinear system optimization of hydropower station reservoir group combined-scheduling,which multi-involves hydraulic connection, electric relations, multi-objective and multi-constrained, this paper introduces the hybrid control double parallel optimization method,based on MPI and OpenMP, realizing synchronization parallel calculation of multi-process and multithread successfully, and providing a fast solution way of large-scale multi-constrained hydropower station reservoir group combined-optimization scheduling.(4) Example analysis of hydropower stations reservoir joint optimal scheduling in large basin。 This paper studies distribution of hydropower station, characteristics of hydrology and reservoir regulation, and establishes joint optimization scheduling model in part of large hydropower station reservoir group of Yangtze river southwest and part of large hydropower station reservoir group of central China. The problem of hydropower station reservoir group scheduling in large basin is resolved to small-scale problem. Then reservoir operation knowledge and experience are used to overall harmonize. The results show that developing hydropower station group optimization scheduling not only increases generated energy,but also improves guaranteed output of the whole hydropower station group.(5) The risk analysis of a controlled reservoir'storage and discharge in a large-scale basin. Take the Three Gorges Reservoir for example, to investigate how the process of water storage and discharge affect the power network operation, experimental water storage and discharge in2008has been studied carefully in respect of storage time, storage goal, storage process and drawdown process. Base on this, the Three Gorges Reservoir's storage and discharge time and principle should be followed has been proposed which will play a guiding role in the Three Gorges cascade hydropower station operation and reservoir group joint dispatch.(6) The development of hydropower station reservoir dispatching automation system in a large-scale basin. Based on the demand of reservoir group operation, this paper puts forward the computer network and software structure for automation system's construction. It is necessary to research data communication, data base and man-machine interface for the establishment of basic application platform and3d scene simulation. Especially, aiming at the need of watershed simulation, hydro-junction conditions simulation and other water regime and dispatch3d simulation, the solution combined with virtual reality technology and geographic information system (VR&GIS) is proposed, which provides a visual and well interoperable terminal service system. The system will not only meet the requirements of professional application, but also provide scientific, visual basis for decision-making.