Hydropower station group modulation scale optimal scheduling method under complex time interval coupling type restriction

Abstract

The invention belongs to the field of hydroelectric scheduling operation, and discloses a hydropower station group modulation scale optimal scheduling method under complex time interval coupling type restriction. By means of increasing of the step length of a single time interval, the time interval coupling type restriction is weakened or relaxed, a practicable searching space of a decision variable is enlarged, and further the initial solution of an original problem and optimization solution efficiency are improved. The technical scheme of the method includes that within the same scheduling cycle, according to the sequence from large to small of single time intervals, a series of hydropower station group optimal scheduling problems with the same restriction and requirement but different step lengths are sequentially solved, the initial output process of a small-step-length problem directly adopts an optimal output result of a large-step-length problem in an upper stage in the solving process, and the initial solution is determined by means of fixed output regulation calculation. The hydropower station group modulation scale optimal scheduling method has the advantages that a traditional optimal scheduling algorithm is not needed to be improved, just by means of repeated usage, hydropower station group modulation optimal scheduling quality can be improved, application difficulty is reduced, and important popularization and application value are achieved.

Description

technical field [0001] The invention relates to the field of hydropower dispatching and operation, in particular to a group-variable-scale optimal dispatching method for hydropower stations under the constraint of complex period coupling. technical background [0002] The short-term optimal scheduling of hydropower station groups is a nonlinear high-dimensional optimization problem with a large number of complex constraints and requirements, especially the complex time-coupling constraints such as the output ramp limit of hydropower stations, the minimum duration of start-up and shutdown, and output fluctuation control. The efficient solution of scheduling problems poses great difficulties, and the difficulty is increasing. In recent years, with the continuous improvement of the fine control requirements of the power grid, the operation control requirements of hydropower stations have become more stringent, usually manifested in the mandatory requirements for the power stati...

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Problems solved by technology

[0003] At present, there are few related research results at home and abroad that design special solution methods or processing strategies for time-period coupling constraints. The existing correlation adjustment models usually need to improve the optimization algorithm itself, and the coupling is difficult. The published results are mostly used for successive approximation algorithms. , when using other mature hydropower dispatching algorithms, it is difficult to fully combine with this model to play its effective role, which limits its popularization and use

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