Application of Physics-Informed Machine Learning Techniques for Power Grid Parameter Estimation

Subhash Lakshminarayana, Saurav Sthapit, Carsten Maple

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)
33 Downloads (Pure)

Abstract

Power grid parameter estimation involves the estimation of unknown parameters, such as the inertia and damping coefficients, from the observed dynamics. In this work, we present physics-informed machine learning algorithms for the power system parameter estimation problem. First, we propose a novel algorithm to solve the parameter estimation based on the Sparse Identification of Nonlinear Dynamics (SINDy) approach, which uses sparse regression to infer the parameters that best describe the observed data. We then compare its performance against another benchmark algorithm, namely, the physics-informed neural networks (PINN) approach applied to parameter estimation. We perform extensive simulations on IEEE bus systems to examine the performance of the aforementioned algorithms. Our results show that the SINDy algorithm outperforms the PINN algorithm in estimating the power grid parameters over a wide range of system parameters (including high and low inertia systems) and power grid architectures. Particularly, in case of the slow dynamics system, the proposed SINDy algorithms outperforms the PINN algorithm, which struggles to accurately determine the parameters. Moreover, it is extremely efficient computationally and so takes significantly less time than the PINN algorithm, thus making it suitable for real-time parameter estimation. Furthermore, we present an extension of the SINDy algorithm to a scenario where the operator does not have the exact knowledge of the underlying system model. We also present a decentralised implementation of the SINDy algorithm which only requires limited information exchange between the neighbouring nodes of a power grid.
Original languageEnglish
Article number2051
Number of pages14
JournalSustainability (Switzerland)
Volume14
Issue number4
DOIs
Publication statusPublished - 11 Feb 2022
Externally publishedYes

Bibliographical note

Copyright: © 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/)

Keywords

  • Parameter estimation
  • Physics-informed neural networks
  • Sparse identification of nonlinear dynamics

Fingerprint

Dive into the research topics of 'Application of Physics-Informed Machine Learning Techniques for Power Grid Parameter Estimation'. Together they form a unique fingerprint.

Cite this