September 19, 2024
Conference Paper

Improved Transient Stability Analysis of Multi-loop Droop-Controlled Grid Forming Inverters with Current Reference Limiter

Abstract

Grid-forming control is regarded as a promising technology for achieving high levels of renewable energy integration in future power grids. To fulfill this role, grid-forming devices is expected to possess fault ride through capability. This paper focuses on the transient stability of a droop control-based grid-forming inverter that utilizes current reference saturation as a current limiting strategy. The objective of this work is to investigate the fault recovery process of the grid-forming inverter and analyze the criterion for transitioning the inverter out of the current limiting mode. The theoretical analysis in this study is validated through time-domain simulations, which compare the results obtained using the circuit current limiting method and the d-axis priority-based current limiting method. Various operational conditions are considered to comprehensively evaluate the performance of the grid-forming inverter during a three-phase short circuit scenario. The simulation results confirm the effectiveness of the proposed theoretical approach.

Published: September 19, 2024

Citation

Lyu X., W. Du, S. Mohiuddin, S. Nandanoori, and M.A. Elizondo. 2024. Improved Transient Stability Analysis of Multi-loop Droop-Controlled Grid Forming Inverters with Current Reference Limiter. In IEEE Power & Energy Society Innovative Smart Grid Technologies Conference (ISGT 2024), February 19-22, 2024, Washington, D.C., 1-5. Piscataway, New Jersey:IEEE. PNNL-SA-188328. doi:10.1109/ISGT59692.2024.10454164