A real-time optimal scheduling method for cascade hydropower station groups under complex constraints

Abstract

The invention relates to the field of power system planning and dispatching operation, and discloses a real-time cascade hydropower stations dispatching optimizing method under complex restrictions. According to the method, a real-time dispatching algorithm is introduced into day-ahead power generation plans, the maximum total storage energy of a cascade hydropower system serves as the optimizing target, and the requirements of real-time dispatching for safety, timeliness, practicability and economy are met. According to the technical scheme of the method, a mode that the hydropower station day-ahead power generation plans and plant-to-plant load deviation optimizing and distribution results are overlaid, real-time power generation plans are generated in a rolling mode, and unit vibration regions are avoided in real time. For a hydropower station with the abandoned water problem, a practical abandoned-water adjustment strategy is designed, the advantages of cascade hydropower station adjustment are adopted, reservoir predrainage is adopted, unnecessary abandoned water is avoided, and the utilization rate of water resources is improved. The method has the advantages that the future development of the power grid is predicted, and a solid theory foundation is provided for construction of real-time dispatching optimizing systems of cascade hydropower stations.

Description

technical field [0001] The invention relates to the field of power grid planning and scheduling operation, in particular to a real-time optimal scheduling method and adjustment strategy for cascade hydropower station groups under complex constraints. technical background [0002] Due to abnormal events such as high temperature, drought, heavy rain, and icing, it is difficult to accurately predict the system load. Usually, load forecasting on weekends, May Day, and National Day is also a difficult point in actual work. These factors can easily lead to actual load and power generation plan load. There is a large deviation; on the other hand, the eastern and southern regions of my country have a subtropical monsoon climate, which is easily affected by typhoons, and the rainfall and runoff vary greatly, making it difficult to accurately predict, which may easily lead to large deviations between the power generation plan and the actual process. Therefore, for a power grid with a l...

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Problems solved by technology

[0004] The results of this invention look forward to the future development of the power grid. At present, most of the relevant research results and literature reports in China are aimed at real-time load distribution in a single period. There is no real-time scheduling method for cascade hydropower station groups that considers the fast and reliable avoidance of unit vibration areas and the adjustment strategy of power station water abandonment.

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