Hydropower station plant inside economic scheduling method considering anomaly restriction operation zone

Abstract

The invention discloses a hydropower station plant inside economic scheduling method considering an anomaly restriction operation zone, comprising steps of scattering the water head variable zone in the scheduling period into a plurality of continuous subintervals, introducing water head subinterval indication variables for replacement to realize the water head dynamic changing, on the basis of that, determining a representative water head in each water head subinterval to determine the characteristic of machine set dynamics, and realizing the fact that the dynamic characteristics of the machine set are changed along with the water head, for each water head subinterval, performing pre-processing on a machine set limitation operation zone, generating a rectangle machine set operation zone, introducing an indication variable of the operation zone for identification, and realizing the fact that the machine set limitation operation zone changes along the dynamic of the water head. A segmentation linear method is adopted to describe the water level-reservoir capacity relation and the tail water level-discharge non-linear relation. The invention utilizes the whole plant optimum dynamic characteristics and adopts the principle of determining water by electricity to perform initial estimation on the power generation water head dynamic characteristics of the dynamic machine set and the limitation operation zone, and solves the problem through a branch and bound algorithm.

Description

technical field [0001] The invention relates to the field of grid planning and dispatching operation, in particular to an economical dispatching method in a hydropower station considering the irregular restricted operation area. technical background [0002] As an important part of the power system, the hydropower system plays a key role in the economic dispatch of the power system. Among them, the economic dispatch in the hydropower station plays an indispensable role. According to domestic and foreign data, the economic dispatch benefit in the hydropower station can be as high as 0.5% to 3%. With the quickening pace of my country's electricity market reform, the importance of economic dispatch in the hydropower station's participation in the competition process has become increasingly prominent and has received more and more attention. In-plant economic scheduling of hydropower stations includes time optimization and space optimization. The basic task is to study the opti...

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Problems solved by technology

[0003] The results of this invention look forward to the future development of the power grid. At present, most of the relevant domestic research results and literature reports are aimed at the optimal dispatch of the rectangular restricted operation area. There is no economic dispatch method in the hydropower station considering the restricted operation area of ​​irregular units.

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