An improved relaxation based spatial domain decomposition method for parallel transient stability simulation

Gnanavignesh, R and Shenoy, UJ (2022) An improved relaxation based spatial domain decomposition method for parallel transient stability simulation. In: International Journal of Electrical Power and Energy Systems, 135 .

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Abstract

Transient stability assessment by time domain simulation is an indispensable module in Dynamic Security Assessment application employed for maintaining power system security and reliability. Due to continuous expansion and imposition of new complexities, reduction in time required for the simulation of system dynamics is vital for both grid operation and planning. This paper proposes a domain decomposition methodology employing spatial parallelism based on relaxation conditions to speedup transient stability simulations to handle the aforementioned challenge. Since convergence is an issue in relaxation methods, in this work, a convergence enhancing mechanism involving admittance parameters of fictitious networks which mimic the rest of the system for each decomposed smaller network is derived. The proposed method, improves the convergence property of the Parallel Update Relaxation algorithm employed for the concurrent simulation. Also, a technique of port dependency reduction, which guarantees convergence for any general network is presented. The accuracy of the proposed algorithm is validated on a 9-bus system. For the purpose of measuring the performance metrics of the algorithm, two large test cases comprising of 39936 and 79872 buses are considered. Results corroborate the scalability and improved speedup features of the methodology which achieves a significant reduction in the simulation execution time. © 2021 Elsevier Ltd

Item Type:	Journal Article
Publication:	International Journal of Electrical Power and Energy Systems
Publisher:	Elsevier Ltd
Additional Information:	The copyright for this article belongs to Elsevier Ltd
Keywords:	Electric power system stability; Electric power transmission networks; Time domain analysis; Transients, reductions; Domain decompositions; Domain-decomposition methods; Parallel com- puting; Power grids; Relaxation-based; Spatial domain decompositions; Time-domain simulations; Transient stability assessment; Transient stability simulation, Domain decomposition methods
Department/Centre:	Division of Electrical Sciences > Electrical Engineering
Date Deposited:	03 Dec 2021 08:23
Last Modified:	03 Dec 2021 08:23
URI:	http://eprints.iisc.ac.in/id/eprint/70187

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