Small signal interactions involving a synchronous machine and a grid forming converter

Benedetti, Luke and Papadopoulos, Panagiotis N. and Egea-Alvarez, Agustí; (2021) Small signal interactions involving a synchronous machine and a grid forming converter. In: 2021 IEEE Madrid PowerTech, PowerTech 2021 - Conference Proceedings. 2021 IEEE Madrid PowerTech, PowerTech 2021 - Conference Proceedings . IEEE, ESP. ISBN 9781665435970 (https://doi.org/10.1109/PowerTech46648.2021.949492...)

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Abstract

Interactions between synchronous machines (SMs) and grid forming converters (GFMs) will become increasingly relevant as the power system transitions from a conventional fossil fueled synchronous based system to a renewable generation rich and converter-based system. This paper investigates and confirms the possibility of electromechanical oscillatory modes between conventional SMs and converter connected generation using a GFM control algorithm as well as between two GFMs. The study employs small-signal models and performs small-signal eigenvalue analysis. Moreover, parametric sweeps are performed, to investigate the impact of network and GFM control parameters in controlling the electromechanical modes.