Boundary Identification Method of Power Constrained Feasible Region of Scuc Model Based on Rank Judgment

A technology of power flow constraint and feasible region, which is applied to AC networks, AC network circuits, electrical components and other directions of the same frequency with different sources, which can solve problems such as unavailability of unit combination results, spatial variation of feasible regions, and inability to filter out constraints. , to achieve the effect of improving the effect of energy-saving scheduling, increasing the calculation speed, and improving the effect of energy saving and environmental protection.

Active Publication Date: 2022-03-15
ZHEJIANG UNIV
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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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  • Boundary Identification Method of Power Constrained Feasible Region of Scuc Model Based on Rank Judgment
  • Boundary Identification Method of Power Constrained Feasible Region of Scuc Model Based on Rank Judgment
  • Boundary Identification Method of Power Constrained Feasible Region of Scuc Model Based on Rank Judgment

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[0063] The content and features of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments. The conditional data in the examples are exemplary and are only used to explain the present invention, but not to limit the protection scope of the present invention.

[0064] Such as figure 1 As shown, the present invention provides a method for identifying the boundary of the feasible region of the unit combination optimization model branch power flow constraints based on the judgment of the rank attribute of the linear equation. The method includes the following steps:

[0065] Step 1: Generate a complete set of branch active power flow inequality constraints

[0066] S-1.1 Generating branch active power flow constraints during normal operation of the power grid:

[0067]

[0068] In formula (1), P i is the active power flow of branch i when the power grid is in normal operation, is the long-term allowable current ...

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Abstract

The invention discloses a rank-judgment-based method for identifying the feasible region boundary of SCUC model power flow constraints. Boundary; obtain all feasible domain vertices and their corresponding equation boundary sets; count the feasible domain vertex sets corresponding to each equality boundary; judge whether each equation is a boundary constraint according to the vertices, and obtain all equation form boundary constraints; The boundary equality constraints are restored to a set of boundary inequality constraints in the feasible region; the method of the invention can effectively reduce the model size of the unit combination optimization problem, shorten the calculation time of the unit combination optimization, and then improve the reliability and robustness of the solution to the optimization problem; The application of the inventive method can increase the calculation speed of power grid energy-saving dispatching, improve the effect of energy-saving dispatching, reduce the operation loss of the power grid, thereby reduce carbon emissions, and achieve better energy-saving and environmental protection effects.

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/06
CPCH02J3/06H02J2203/20H02J2203/10
Inventor 鲍威章晨黄强
Owner ZHEJIANG UNIV
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