Phasor-Domain Modeling of Inverter Based Resources Considering Unbalanced Grid Faults

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

DOI:https://doi.org/10.1109/PESGM51994.2024.10689193· OSTI ID:2537874

Chen, Zhe ^[1]; Liu, Hanchao ^[1]; Hart, Philip J. ^[1]; Du, Wei ^[2]; Tuffner, Francis K. ^[2]; Nwaneto, Udoka C. ^[2]

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1. General Electric Research
2. BATTELLE (PACIFIC NW LAB)

A significant increase in inverter-based distributed energy resources (DERs) is expected in distribution systems of the near future. The latest phasor modeling approach of DERs with emerging control technologies can capture relevant dynamics in large-scale three-phase distribution systems with unbalanced construction. However, there is a lack of appropriate phasor models to deal with unbalanced fault scenarios. As such, this paper describes per-phase phasor modeling approach appropriate for unbalanced grid disturbance studies in distribution systems with high penetration of DERs. The overall modeling performance of representative DERs is simulated in phasor domain GridLAB-D environment and validated against controller hardware-in-the loop (CHIL) testing or electromagnetic transient (EMT) based switching model simulation in PSCAD with test cases including different unbalanced grid faults. The high accuracy retained from the simulation verifies the effectiveness of the proposed phasor modeling approach considering interactions between positive and negative sequence signals.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 2537874
• Report Number(s): PNNL-SA-202671
• Country of Publication: United States
• Language: English