SCUC model construction method for depicting power transmission constraints and strengthening unit operation model based on graph theory

By characterizing transmission constraints and strengthening the unit operation model using graph theory, and combining unit operation parameters, the mathematical expressions for minimum operating time and downtime are added. This solves the problem of insufficient simplicity and compactness of the existing SCUC model, realizes the synergistic optimization of power generation cost and carbon emission cost, and improves the solution efficiency when the grid is congested.

CN117574032BActive Publication Date: 2026-06-23STATE GRID FUJIAN ELECTRIC POWER CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
STATE GRID FUJIAN ELECTRIC POWER CO LTD
Filing Date
2023-11-16
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

Existing SCUC models, when considering unit combinations with safety constraints, suffer from insufficient compactness and simplicity, fail to effectively integrate various operational technical characteristics, and do not adequately consider the synergistic effects of low-carbon objectives and minimum power generation cost objectives. In particular, the shortest operating time and downtime of coal-fired power generating units far exceed the optimization cycle.

Method used

Graph theory is used to characterize transmission constraints and enhance the unit operation model. Combined with the actual situation of unit operating parameters, the mathematical expressions of shortest operating time and downtime are added, and carbon emission cost term is added to the objective function. A SCUC model for calculating DC power flow using graph theory is constructed to optimize the expression of unit output and transmission constraints.

Benefits of technology

It improves the simplicity and compactness of the model, enhances the solution efficiency under grid congestion conditions, achieves synergistic optimization of power generation costs and carbon emission costs, and adapts to the expansion of power system scale.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application relates to an SCUC model construction method for describing power transmission constraints and reinforcing a unit operation model by using graph theory. The method reinforces and perfects the modeling of a generator unit, constructs an SCUC model for calculating direct current power flow by using graph theory, considers carbon emission cost in an objective function, and realizes cooperation with a traditional optimization objective. The method mainly focuses on improving the unit operation model, so that the model has better compactness; the mathematical model of the unit is perfected in combination with the actual situation of unit operation parameters, and mathematical expression that the shortest operation time / stop time of the unit is not less than an optimization period is added; then, based on the application result of linear optimal power flow calculation based on graph theory, an SCUC model for describing power transmission constraints and reinforcing the unit operation model by using graph theory is given.
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