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

Conference ·
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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.

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
OSTI ID:
2332737
Report Number(s):
NREL/CP-6A40-87274; MainId:88049; UUID:4d8a4b1c-72ec-4f1f-bb68-006cda81afee; MainAdminId:72000
Resource Relation:
Conference: Presented at the 2024 IEEE Power & Energy Society Innovative Smart Grid Technologies Conference (ISGT), 19-22 February 2024, Washington, D.C.
Country of Publication:
United States
Language:
English

References (17)

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Analysis of Electric Machinery and Drive Systems June 2013
A new linear model for active loads in islanded inverter-based microgrids October 2016

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Related Subjects

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