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Abstract
Grid-forming (GFM) inverters are required to operate robustly against grid faults. However, due to the limited over-current capability of inverters, current-limiting controls are usually applied to protect these semiconductor devices, which may prevent GFM inverters from a successful fault recovery. To understand this phenomenon, this study analyzes the fault recovery process of a GFM inverter with a priority-based current limiter. According to whether the GFM inverter can ensure transient stability and exit the current-limiting mode after fault clearance, three post-fault scenarios are identified, including <italic>normal operation, current limitation, and oscillations</italic>. Further, the impacts of the short-circuit ratio and control parameters on the post-fault behavior of GFM inverters are demonstrated. To illustrate the implications of these theoretical results, typical numerical examples are presented. Finally, the theoretical findings are validated through experimental tests.
Original language | English |
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Journal | IEEE Transactions on Power Systems |
Volume | 38 |
Issue number | 6 |
Pages (from-to) | 5102-5112 |
Number of pages | 10 |
ISSN | 0885-8950 |
DOIs | |
Publication status | Published - Nov 2022 |
Keywords
- Behavioral sciences
- Circuit faults
- Current limiters
- Grid-forming (GFM) inverter
- Inverters
- Switches
- Transient analysis
- Voltage control
- fault recovery
- post-fault phenomenon
- priority-based current limiter
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Dive into the research topics of 'Fault Recovery Analysis of Grid-Forming Inverters With Priority-Based Current Limiters'. Together they form a unique fingerprint.Projects
- 1 Finished
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FRESLING: FREquency Security of Low-INertia electrical Grids
Fan, B., Wang, X. & Steffensen, B.
01/07/2021 → 30/06/2023
Project: Research