SCUC model power flow constraint feasible region boundary identification method based on rank judgment

Abstract

The invention discloses an SCUC model power flow constraint feasible region boundary identification method based on rank judgment. The method comprises the following steps: generating a complete branch active power flow inequality constraint set according to the safety operation requirements of a power grid in an SCUC problem; constructing an equation boundary corresponding to the inequality constraint; obtaining all feasible region vertexes and corresponding equality boundary sets thereof; counting a feasible region vertex set corresponding to each equation boundary; judging whether each equation is a boundary constraint or not according to the vertex, and obtaining the boundary constraints of all equation forms; and restoring the boundary equality constraints into a feasible region boundary inequality constraint set. According to the method, the model scale of the unit commitment optimization problem can be effectively reduced, the calculation time of unit commitment optimization is shortened, and then the reliability and robustness of optimization problem solving are improved; and by applying the method, the energy-saving dispatching calculation speed of the power grid can be increased, the energy-saving dispatching effect can be improved, the operation loss of the power grid can be reduced, carbon emission can be reduced, and better energy-saving and environment-friendly effects can be realized.

Description

technical field [0001] The invention relates to a method for identifying the boundary of a feasible region bounded by power flow constraints of a unit combination optimization model based on the judgment of the rank attribute of a linear equation, and belongs to the field of power grid energy-saving dispatching control under the background of an electric power market. Background technique [0002] Security Constrained Unit Combination (hereinafter referred to as SCUC) is one of the important daily tasks that grid companies, independent system operators (ISOs) or regional transmission organizations (RTOs) must complete in the daily electricity market, and it is also an important tool for power companies to optimize bidding strategies one. SCUC usually aims to minimize operating costs (generation costs, network loss costs, environmental costs, etc.) while satisfying all system-wide constraints, such as system requirements, backup requirements, safety-related transmission const...

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Problems solved by technology

However, there are two problems in the above filtering methods: on the one hand, it is impossible to filter out all redundant constraints, and there are still many useless constraints left in the optimization model; Irregularity may lead to changes in the feasible domain space, which may eventually lead to unusable unit combination results or not economically optimal

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