Power grid annual power purchase plan formulation method and system based on game theory

Abstract

The invention provides a power grid annual power purchase plan formulation method and system based on the game theory. The method comprises the following steps of: collecting the annual total load electric quantity of a power grid, the generator set number of a total power grid, the grid purchase price of each generator set, the coal consumption of each generator set, the upper limit and the lower limit of the annual power generation amount of each generator set, the annual average load rate of each generator set and the upper limit of the difference of the annual average load rate of each generator set; setting the parameter of the annual power generation amount of each generator set; determining a target to be optimized in the power grid annual power purchase plan; building a sub-target functional equation and a constraint equation; converting the power purchase plan into a multi-target optimization problem; on the basis of the game theory, comprehensively optimizing each target to be optimized to obtain the weight value of each target functional equation; converting a multi-target optimization problem into a single-target optimization problem; and determining to obtain the power generation plan value of the annual power generation amount of each generator set. According to the power grid annual power purchase plan formulation method disclosed by the invention, a plurality of targets can be both considered while the power purchase plan is formulated, and meanwhile, a plurality of targets are optimized.

Description

technical field [0001] The invention relates to the field of formulating an annual power purchase plan for a power grid, in particular to a method and system for formulating an annual power purchase plan for a power grid based on game theory. Background technique [0002] Under the system of "energy-saving power generation dispatching", the main goal of power dispatching is to minimize the energy consumption and emissions of power grid generating units, but the economics of power grid dispatching have not been fully reflected. Especially when there is a conflict between energy-saving power generation scheduling goals and economic scheduling goals, economic requirements are easily overlooked, and it is difficult to find a reasonable balance between the two goals. [0003] Energy-saving power generation scheduling requires power grid companies to prioritize renewable power generation resources in accordance with the principle of energy conservation on the premise of ensuring r...

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Problems solved by technology

[0005] However, the main disadvantage of using the scheme of optimizing coal consumption with the constraint of electricity purchase cost is that when determining the optimization problem, the optimization goal is to minimize the electricity purchase cost first, and then gradually release the constraint of power purchase cost, considering the optimal The change of coal consumption uses a power purchase cost slack factor to represent the degree of deregulation of the power purchase cost. However, there is no systematic method for the selection of the power purchase cost slack factor. Generally, it can only be selected based on actual experience or personal judgment of the staff. The annual power purchase plan for the power grid thus formulated is still unable to achieve the optimal balance between economics (power purchase cost) and energy conservation (coal consumption). It is still difficult to achieve an optimal balance between economics (power purchase cost) and energy saving (coal consumption) in the annual power purchase plan

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