A Method and System for In-plant Economic Operation of Hydropower Stations Considering Constraints of Multiple Sub-plants

Abstract

The invention discloses a hydropower station in-plant economic operation method and a system considering multiple sub-plant constraints, and the method comprises the following steps: establishing a whole-plant load distribution model according to the flow output characteristic curve of each unit of a hydropower station, taking the minimum water consumption as a target, and solving a whole-plant optimal load distribution table through dynamic planning; establishing a sub-plant load distribution model according to the sub-plant load distribution constraint, and distributing the whole plant loadto each sub-plant; establishing a unit load distribution model in combination with the optimal load distribution table of the whole plant, and distributing the sub-plant load to each unit; and circulating period by period, and solving an intra-day in-plant economic operation scheme. According to the method, the in-plant economic operation of the hydropower station is divided into two levels of branch plants and single machines, and the optimal load distribution table is combined with the practical load adjustment strategy, so that the in-plant economic operation scheme of the hydropower station can be quickly and stably solved in real time on the premise of considering the branch plant line constraint, the minimum startup machine number constraint and the minimum shutdown machine number constraint of the hydropower station.

Description

technical field [0001] The invention belongs to the field of optimal scheduling of hydropower energy, and more specifically, a method and system for in-plant economic operation of a hydropower station considering the constraints of multiple sub-plants. Background technique [0002] With the gradual improvement of hydropower energy development, a large number of giant hydropower plants with multiple units and multiple transmission lines have been put into operation. In order to facilitate installation and operation management, giant hydropower stations are often divided into multiple sub-plants to install units, and different sub-plants transmit power to the receiving area through different transmission lines. In order to ensure the safe and stable operation of the power station, the number of start-up and shutdown units of different branches is required to be as uniform as possible; during holidays or line maintenance conditions, the power grid limits the capacity of the lin...

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Problems solved by technology

[0005] Aiming at the defects of the prior art, the object of the present invention is a method and system for economic operation of a hydropower station considering the constraints of multiple sub-plants, aiming at solving the problem that the existing in-plant economic operation does not consider the constraints of multi-sub-plants, the solution speed is slow, and it cannot meet the requirements. Problems with actual operational requirements

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