A method and system for selecting the optimal representative water head of a hydropower station milp model

Abstract

The invention discloses a method and system for selecting the optimal representative water head of the MILP model of a hydropower station. The selection method includes the following steps: establishing the MILP model of the representative water head hydropower station; the MILP model of the representative water head hydropower station includes an objective function and operation simulation constraints; The characteristic matrix M for selecting the optimal representative head is established with the MILP model of the representative water head hydropower station; the optimal representative head of the dispatching day x is obtained according to the predicted average inflow flow, predicted average output and characteristic matrix M of the dispatching day x. The purpose of the present invention is to provide a method and system for selecting the optimal representative water head of the MILP model of a hydropower station. By mining the law of historical data and combining the average inflow flow and average output prediction results of the hydropower station, the fine hydropower dispatch can be realized, ensuring that the actual hydropower dispatch The water volume matching between the upstream and downstream hydropower stations of the cascade improves the utilization efficiency of water resources in the basin.

Description

technical field [0001] The invention relates to the technical field of hydropower dispatching operation, in particular to a method and system for selecting the optimal representative water head of the MILP model of a hydropower station. Background technique [0002] At present, the commonly used methods for solving hydropower dispatching problems include linear programming, nonlinear programming, mixed integer linear programming, dynamic programming, and heuristic modern intelligent algorithms, among which the mixed integer linear programming method has become one of the important methods for solving hydropower dispatching problems in power grid dispatching. one. After years of high-speed hydropower development, Sichuan hydropower has achieved tremendous development. By the end of 2019, the social-caliber hydropower installed capacity of Sichuan Power Grid was 78.403 million kilowatts, accounting for more than 79% of the power supply structure, ranking first in the national ...

AI Technical Summary

Problems solved by technology

The high-intensity and ultra-large-scale hydropower stations in operation in the Sichuan power grid lead to the situation that many same channels are connected to multiple river basin power stations and the same river basin is connected to multiple sending channels in the grid structure. The hydraulic and electrical coupling relationship is very complicated. In addition, The characteristics of large-scale, high-dimensional, and nonlinear hydropower dispatching bring huge challenges to Sichuan power grid hydropower dispatching

However, during the operation of the hydropower station, the water head is affected by the water level in front of the upstream dam and the downstream tail water level. It is difficult to accurately describe the relationship between the power generation of the hydropower station and the outflow flow only by using the design head, and the simulation accuracy is poor.

Especially limited by the level of management, some power stations still have problems such as lack of design data and incompleteness, which further increases the deviation between the traditional fixed head simulation and the actual operating conditions, which may easily cause a mismatch between upstream and downstream water volumes, increase abandoned water, reservoirs, etc. Pull risk

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