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Development and Application of a Resilience-Based Index
for Stability Assessment of Grid Integrated with
Grid-Forming Inverters
Lee Su-Ho
Departmen of Electric and Electrical Engineering
Graduate School
Keimyung University
(Supervised by Professor Park Young-Su)
ABSTRACT
This research focuses on analyzing the impact of Grid-Forming inverters in modern power systems with a growing share of renewable energy and develops a Frequency Stability Composite Index (FSCI) for evaluating their effectiveness particularly within the Jeju power grid. As Jeju Island progresses toward its "Carbon Free Island 2030" initiative incorporating Grid-Forming inverters has become essential to address the limitations of existing Grid-Following inverters in low-inertia systems. The study includes simulations based on the IEEE-9 bus test system and the Jeju grid exploring various disturbance scenarios to assess the contribution of Grid-Forming inverters. The evaluation spans scenarios with renewable energy penetration levels of 30% 50% 70% and 100%.
Furthermore the FSCI methodology is applied to quantitatively measure the dynamic frequency and voltage recovery characteristics providing insights into strategies for enhancing grid stability in high-renewable contexts.
Full Thesis translated from the original Korean language to English :
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