Practical Implementation and Operational Experience of Dynamic Mode Decomposition in Wide-area Monitoring Systems of Italian Power System

• Published in: Journal of modern power systems and clean energy 2023-05, Vol.11 (3), p.793-802
• Main Authors: Andrea Vicario, Alberto Berizzi, Giorgio Maria Giannuzzi, Cosimo Pisani
• Format: Article
• Language: English
• Subjects: dynamic mode decomposition; Power system control; power system dynamics; wide-area monitoring system (WAMS)
• ISSN: 2196-5420
• DOI: 10.35833/MPCE.2021.000509

This study presents the assumptions and strategies for the practical implementation of the dynamic mode decomposition approach in the wide-area monitoring system of the Italian transmission system operator, Terna. The procedure setup aims to detect poorly damped interarea oscillations of power systems. Dynamic mode decomposition is a data-driven technique that has gained increasing attention in different fields; the proposed implementation can both characterize the oscillatory modes and identify the most influenced areas. This study presents the results of its practical implementation and operational experience in power system monitoring. It focuses on the main characteristics and solutions identified to reliably monitor the interarea electromechanical modes of the interconnected European power system. Moreover, conditions to issue an appropriate alarm in case of critical operating conditions are described. The effectiveness of the proposed approach is validated by its application in three case studies: a critical oscillatory event and a short-circuit event that occurred in the Italian power system in the previous years, and a 15-min time interval of normal grid operation recorded in March 2021.