| Title |
Observation on the Relationship between Short-Circuit Capacity and Frequency Regulating Reserve |
| Authors |
권기표(Gipyo Kweon) ; 김민석(Minseok Kim) ; 김채아(Chaea Kim) ; 이대범(Daebeom Lee) ; 이동원(Dongwon Lee) ; 김범주(Beomju Kim) ; 박정후(Jeonghoo Park) |
| DOI |
https://doi.org/10.5370/KIEE.2026.75.8.1677 |
| Keywords |
Frequency regulating reserve; power system inertia; renewable energy resources deployment; short-circuit capacity; system strength |
| Abstract |
The increasing penetration of renewable energy resources (RES) in modern power grids has precipitated a significant decline in both system-wide rotational inertia and localized system strength. While prior research has often examined these factors independently, this study investigates their interdependent relationship. Specifically, the paper evaluates the impact of short-circuit capacity (SCC) on system reserve requirements by quantifying the Frequency Regulating Reserve (FRR) capacity necessary to satisfy frequency nadir constraints under the largest contingency. Through a comparative analysis of regional RES deployment within the Korean power system, simulation results indicate a consistent increasing trend in FRR requirements when RES are integrated into low-SCC areas under the tested operating conditions. These findings highlight the technical challenges and operational requirements of interconnecting RES in weak grid regions, underscoring the necessity of implementing location-aware electricity market frameworks. |