Region-Based Stability Analysis of Resilient Distribution Systems with Hybrid Grid-Forming and Grid-Following Inverters
In this paper, distribution system stability considering mixed grid-forming (GFM) and grid-following (GFL) inverters is discussed. A holistic small-signal model of the distribution feeder accommodating both GFM and GFL inverters is derived. In contrast to conventional point-by-point stability analysis, a region-based stability assessment approach is proposed and implemented to evaluate small-signal system stability with both GFM and GFL controls. Furthermore, to enhance the computational efficiency, an Artificial Intelligence (AI) assisted Kernel Ridge Regression (KRR) approach is developed to obtain the stability region boundary. Therefore, with the derived stability region, the impact of critical parameters on system stability is intuitively shown, and more importantly, the relationship between the maximum penetration level and the corresponding feasible range of the selected control parameters can be quantified. The proposed approach has been validated using MATLAB/Simulink.
- Research Organization:
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- DOE Contract Number:
- DE-AC36-08GO28308
- OSTI ID:
- 1755714
- Report Number(s):
- NREL/CP-5D00-78688; MainId:32605; UUID:3b33225b-725d-4adf-98b2-d608799ee01d; MainAdminID:19034
- Journal Information:
- IEEE Energy Conversion Congress and Exposition (ECCE), Vol. 2020; Conference: 2020 IEEE Energy Conversion Congress and Exposition (ECCE), Detroit, MI (United States), 11-15 Oct 2020; ISSN 2329-3721
- Publisher:
- IEEE
- Country of Publication:
- United States
- Language:
- English
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