Transient Stability Analysis of Direct Droop-Controlled Grid-Forming Inverter with Current Clipping as Current Limiting Control

Conference · Fri Oct 04 00:00:00 EDT 2024

DOI:https://doi.org/10.1109/PESGM51994.2024.10689179· OSTI ID:2537871

Mohiuddin, Sheik Mohammad ^[1]; Du, Wei ^[1]; Lyu, Xue ^[1]; Nandanoori, Sai Pushpak ^[1]; Elizondo, Marcelo A. ^[1]

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1. BATTELLE (PACIFIC NW LAB)

This paper investigates the transient stability of the direct droop-controlled grid-forming (GFM) inverter which employs the current clipping-based approach for overcurrent limitation. An equivalent circuit model of the direct-droop GFM inverter with current clipping is developed for this purpose. It is shown that during overcurrent conditions, the GFM inverter with current clipping acts as a voltage source with a virtual resistance behind the inverter filters. To compute the parameters of this virtual resistance an analytical expression is given in the paper. Then utilizing the developed circuit, a criteria to exit current limiting during post-fault conditions is given. The developed analytical approaches are then validated through electromagnetic transient (EMT) simulation results in PSCAD software and finally concluding remarks are drawn.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 2537871
• Report Number(s): PNNL-SA-192204
• Country of Publication: United States
• Language: English