Study On Optimal Operation Of Cascade Hydropower Stations Based On Energy-Saving Generation Dispatch

With China's rapid economic and social development, resource and environmental constraints become increasingly prominent. As the basis of the energy industry, the electric power industry should establish the scientific concept of development, accelerate the implementation of energy-saving generation dispatching, which has an important strategic significance in raising energy efficiency and energy conservation, reducing environmental pollution, promoting energy and electricity restructuring, ensuring safe and efficient operation to power system, achieving the sustainable development of the electric power industry. The development of energy-saving generation dispatching approach generates from sustainable scientific development concept. It brings new opportunities to the Sichuan hydropower development and should further play the role of the optimal operation of cascade hydropower stations. At the same time, there are still some problems to be improved. This paper mainly includes the following aspects:The basic principles, generating unit sorting table and implementation processes of energy-saving generation dispatching are introduced. The implementation of energy-saving generation dispatching will optimize the electric power industry structure and layout. The implementation of energy-saving generation dispatching will optimize the electric power industry structure and layout. Judging from the pilot provinces, the experiments of energy-saving generation dispatching have remarkable results. The relationship between energy-saving generation dispatching and cascade hydropower stations dispatching is analyzed. The complementarities that exist between Sichuan power grid and around should be strengthened as an example to show that it should strengthen the optimal allocation of regional resources and construct extra high voltage network. In order to ensure grid security and stability, how to implement the 3-principl in energy-saving generation dispatching is analyzed.Based on the analysis of the formation of generation right exchange and matching mechanism, generation right exchange and the compensation mechanism of the optimal operation of cascade hydropower stations should be combined. Redefining the benefit and net benefit of optimal operation of cascade hydropower stations, the order of distribution is given. At the same time, the guidelines of compensation mechanism is studied and developed. By comparing the king consumption on-line and the bidding system, coordination of energy-saving generation dispatching and power market mechanism is analyzed. Considering energy consumption, prices, environmental protection, compensation, safety and other factors, a multi-objective optimization mathematical model of cascade hydropower stations dispatching is established and the solution method based on satisfactory optimization theory is given.With the continuous development of water resources, power structures become increasingly complex, relations between water and electricity will become closer and closer. Based on the grid stability and security, the optimal operation of cascade hydropower stations is studied in this paper. A mode which first optimizes the power network and then optimizes the reservoir operation is proposed. All hydropower are considered as an independent and associated individual by introducing the "Multi-Agent System" concept. Ensuring regional grid or more safe and stable operation, this paper explores how to allocate access and contribution of cascade hydropower stations and to rational optimize water resources. Optimal operation example of cascade hydropower stations in Sichuan Nanchong grid shows that this program has important significance on the real grids dispatching and operation. Because a series of network security and stability issues could be triggered after the implementation of cascade power plants of energy-saving optimal operation, a set of network security and stability control system has been designed. Aim at the operational features of Nanchong northern grid, PSASP simulation system is used to analyze the stability of power grid in this paper.Current model directly dispatch power to various power stations or units, which does not meet the requirements of cascade dispatching. In view of this, it is necessary to construct a joint operating body structure of optimal operation of Cascade Hydropower Stations. Ways of its formation and composition has been explored in this paper. Because of the current slack negotiation model with a number of owners, group decision support system for joint operation of optimal operation of cascade hydropower stations has been proposed. As one of the protection to implement the optimal operation of cascade hydropower stations, research on hydrological forecasting theory and technology and real-time monitoring mechanism should be further strengthened.The composition and level of management information system on optimal operation of cascade hydropower stations is analyzed. At the same time, the combination of structured and prototype development method is proposed. The focus of this part is on computer system, data processing technology, database technology, network technology of OOCHS-MIS, with the characteristics of OOCHS-MIS system summarized.