Spatio-Temporal Deep Learning-Assisted Reduced Security-Constrained Unit Commitment

Arun Venkatesh Ramesh

doi:10.1109/TPWRS.2023.3313430

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Spatio-Temporal Deep Learning-Assisted Reduced Security-Constrained Unit Commitment

2024-03-01

Arun Venkatesh Ramesh

Xingpeng Li *

DOI：10.1109/TPWRS.2023.3313430

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Abstract

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Security-constrained unit commitment (SCUC) is a computationally complex process utilized in power system day-ahead scheduling and market clearing. SCUC is run daily and requires state-of-the-art algorithms to speed up the process. The constraints and data associated with SCU Care both geographically and temporally correlated to ensure reliability of the solution, which further increases the complexity. In this article, an advanced machine learning (ML) model is used to study the patterns in power system historical data, which inherently considers both spatial and temporal (ST) correlations in constraints. The ST-correlated ML model is trained to understand spatial correlation by considering graph neural networks (GNN) whereas temporal sequences are studied using long short-term memory (LSTM) networks. The proposed approach is validated on several test systems namely, IEEE 24-Bus system, IEEE-73 Bus system, IEEE 118-Bus system, and synthetic South-Carolina (SC) 500-Bus system. Moreover, B-theta and power transfer distribution factor (PTDF) based SCUC formulations were considered in this research. Simulation results demonstrate that the ST approach can effectively predict generator commitment schedule and classify critical and non-critical lines in the system which are utilized for model reduction of SCUC to obtain computational enhancement without loss in solution quality.

Keywords:

Constraint reduction

deep neural network

graph neural networks

machine learning

mixed-integer linear programming

model reduction

security-constrained unit commitment

spatio-temporal

variable reduction