Small-Signal Stability Impacts of Load and Network Dynamics on Grid-Forming Inverters

Henriquez-Auba, Rodrigo; Lara, Jose Daniel; Callaway, Duncan S.

doi:10.1109/ISGT59692.2024.10454126

Small-Signal Stability Impacts of Load and Network Dynamics on Grid-Forming Inverters

Conference · Sun Mar 03 23:00:00 EST 2024

DOI:https://doi.org/10.1109/ISGT59692.2024.10454126· OSTI ID:2332737

Henriquez-Auba, Rodrigo; Lara, Jose Daniel;

This paper presents several stability analyses for grid-forming inverters and synchronous generators considering the dynamics of transmission lines and different load models. Load models are usually of secondary importance compared to generation source models, but as the results show, they play a crucial role in stability studies with the introduction of inverter-based resources. Given inverter control time scales, the implications of considering or neglecting electromagnetic transients of the network are very relevant in the stability assessments. In this paper, we perform eigenvalue analyses for inverter-based resources and synchronous machines connected to a load and explore the effects of multiples models under different network representations. We explore maximum loadability of inverter-based resources and synchronous machines, while analyzing the effects of load and network dynamic models on small-signal stability. The results show that the network representation plays a fundamental role in the stability of the system of different load models. The resulting stability regions are significantly different depending on the source and load model considered.

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Research Organization:: National Renewable Energy Laboratory (NREL), Golden, CO (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office; USDOE Office of Electricity (OE)

DOE Contract Number:: AC36-08GO28308; AC36-08GO28308

OSTI ID:: 2332737

Report Number(s):: NREL/CP-6A40-87274; MainId:88049; UUID:4d8a4b1c-72ec-4f1f-bb68-006cda81afee; MainAdminId:72000

Country of Publication:: United States

Language:: English

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Related Subjects

POWER TRANSMISSION AND DISTRIBUTION
grid forming inverters
line dynamics
load dynamics
small-signal analysis

Small-Signal Stability Impacts of Load and Network Dynamics on Grid-Forming Inverters

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