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Converter-driven small signal stability and interaction analysis for grid-following converters using emt and phasor simulations
Publikationstyp
Conference Paper
Date Issued
2023-09
Sprache
English
Volume
2023
Issue
20
Start Page
339
End Page
346
Citation
22nd Wind and Solar Integration Workshop (WIW 2023)
Contribution to Conference
Publisher DOI
Scopus ID
The increasing amount of power electronics, due to the fast dynamics, results in a change in the overall power system dynamics. Thus, stability analysis is required to analyze the converter induced interaction phenomena that can be attributed to converter-driven stability. A prerequisite for stability and interaction studies is the selection of an appropriate model that can represent electromechanical phenomena and electromagnetic transients (EMT) effects. A compromise between accuracy and computation time is required. Therefore, this paper compares the results of small signal stability analyses using converter EMT, detailed and a high level phasor models. The performed eigenvalue, participation factor, and indices analyses show, that interactions between the converters themselves, and between converters and the grid can be best represented using EMT models. We outline a risk of instability for the interactions induced by the phase-locked loop, and the voltage delay. The delay induced interactions can be represented using the detailed phasor model of the converter, while those between the converters can only be represented partially. Even though faster computing time is possible with the high level phasor model, interactions between the converters and the grid cannot be represented.
Subjects
Converter-Driven Stability
Electromagnetic Transients
Interactions
Phasor Modelling
Small Signal Stability