A THREE-STAGE APPROACH FOR DAY-AHEAD UNIT COMMITMENT CONSIDERING ALTERNATING CURRENT POWER FLOW EQUATIONS

Đào Long Vũ; Phạm Năng Văn; Nguyễn Thị Hoài Thu

doi:10.34238/tnu-jst.12302

A THREE-STAGE APPROACH FOR DAY-AHEAD UNIT COMMITMENT CONSIDERING ALTERNATING CURRENT POWER FLOW EQUATIONS

About this article

Received: 13/03/25 Revised: 26/06/25 Published: 27/06/25

Authors

1. Dao Long Vu, School of Electrical and Electronic Engineering - Hanoi University of Science and Technology
2. Pham Nang Van , School of Electrical and Electronic Engineering - Hanoi University of Science and Technology
3. Nguyen Thi Hoai Thu, School of Electrical and Electronic Engineering - Hanoi University of Science and Technology

Abstract

The day-ahead unit commitment is often solved using methods that do not consider the power grid or the power grid model using the direct current power flow formulation. These methods are becoming increasingly ineffective as the load’s power consumption and the penetration level of renewable energy sources continue to rise. This paper proposes a three-stage method to effectively solve the problem of unit commitment with the integration of the alternating current power flow model. These three stages include solving the optimization problem using linear programming with integer variables, solving the optimization formulation using second-order cone programming with integer variables, and solving the optimization model using nonlinear programming. The proposed solution approach is evaluated using the IEEE 6-bus and 24-bus transmission networks. The calculation results show that the proposed procedure has the ability to find the optimal solution and requires a lower computation time compared to the solution method based on nonlinear programming with integer variables.

Keywords

Day-ahead unit commitment; Three-stage method; Linear programming with integer variables; Second-order cone programming with integer variables; Nonlinear programming

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DOI: https://doi.org/10.34238/tnu-jst.12302

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