A two-stage direct search dimensionality reduction method for optimal dispatching of hydropower stations in super large watershed

Abstract

The invention discloses a two-stage direct search dimension reduction method for optimal dispatching of cascade hydropower stations, belonging to the technical field of efficient utilization of waterresources and optimal dispatching of hydropower system. Includes such steps as decomposing multi-stage reservoir group dispatching problem into several two-stage sub-problems after initial dispatchingprocess is given and maximum search step length is calculated; Then the direct search strategy is used to solve each sub-problem. Finally, the global optimal solution is approximated successively byiterative optimization. The practice result of the cascade hydropower station group joint operation fully verifies the effectiveness of the method of the invention. Compared with the traditional stepwise optimization algorithm, The invention adopts the direct search strategy to replace the enumeration calculation operation in the sub-problem, reduces the calculation complexity from the exponentialgrowth to the polynomial growth, remarkably reduces the calculation time and occupies the memory, greatly improves the execution efficiency and the solution scale, and is more suitable for the large-scale complex hydropower system optimization dispatching problem.

Description

technical field [0001] The invention belongs to the technical field of efficient utilization of water resources and optimal scheduling of hydropower systems, and more specifically relates to a two-stage direct search dimension reduction method for optimal scheduling of cascade hydropower station groups. Background technique [0002] Generally, the optimal dispatching of cascade hydropower station groups in super-large river basins with a total installed capacity of more than 5 million kilowatts can give full play to the synergistic effect between upstream and downstream hydropower stations, resulting in outstanding economic and social benefits. At the same time, the role in the hydropower energy system is also increasing day by day. From a mathematical point of view, the joint dispatching of cascade hydropower station groups is a typical complex constrained optimization problem with nonlinear, multi-dimensional, and strong constraints, and its solution methods can be roughly ...

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Problems solved by technology

[0004] Aiming at the defects of the prior art, the object of the present invention is to provide a two-stage direct search dimensionality reduction method for optimal scheduling of trapezoidal hydropower station groups, which introduces the direct search strategy into the solution process of the POA sub-problem, aiming to solve the problem of using the standard POA algorithm in Solving the "curse of dimensionality" and "double counting" problems in joint dispatching of cascade hydropower station groups

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