| Title |
Development of an Analytical Model for Frequency Stability Analysis of Power Systems with Renewable Energy Integration Expansion |
| Authors |
서재필(Jae-Pil Seo) ; 이동호(Dongho Lee) ; 이재형(Jaehyeong Lee) |
| DOI |
https://doi.org/10.5370/KIEE.2025.74.3.529 |
| Keywords |
Frequency Stability Analysis; Generator Aggregation; Governor Conversion |
| Abstract |
In power systems with a high share of renewable energy, the reduced number of synchronous generators in operation leads to weakened system strength. This lack of robustness causes challenges in frequency stability analysis simulations, as voltage instability often occurs before frequency dynamics can be adequately analyzed. This paper proposes an equivalent model for frequency stability assessment in power systems with high renewable energy penetration. The model enables frequency analysis independently of system strength. By aggregating multiple synchronous generators while preserving frequency response characteristics and reducing the system to minimize localized voltage instability issues, the proposed approach ensures accurate frequency analysis. The validity of the proposed model is verified using the Modified IEEE 39-bus system. |