| Title |
Study on the Economic Cross-point Distance of LFAC System for Large-Scale Power Transmission |
| Authors |
Byeong-Hyeon An ; Jeong-Sik Oh ; Tae-Hun Kim ; Jae-Deok Park ; Soon-Youl So ; Tae-Sik Park |
| DOI |
http://doi.org/10.5207/JIEIE.2024.38.3.247 |
| Keywords |
Economic cross-point distance; High voltage AC; High voltage DC; Low frequency AC |
| Abstract |
Global energy paradigms are shifting as the power sector aims to reduce carbon emissions by decreasing reliance on coal power and transitioning to renewable energy sources. However, renewable energy sources are inherently intermittent, making them less suitable as baseload power sources and resulting in an imbalance between generation and load due to geographical constraints of distributed energy resources. To address these challenges, research is being conducted on large-scale power transmission technologies such as HVAC and HVDC. Recently, interest has emerged in the LFAC method, which transmits power at one-third of the standard frequency. This approach offers advantages in reducing the charging capacity of subsea cables, making it a focus of studies in offshore wind power integration. However, economic analyses of large-scale power transmission using LFAC systems in onshore networks remain scarce. This paper aims to determine the economic cross-point distance of LFAC systems for large-scale renewable energy interconnections. To achieve this, we estimated the investment costs of each transmission technology, calculated transmission costs including losses and overhead transmission line installation costs according to distance, and conducted an economic analysis of different transmission methods based on distance. The results indicate that LFAC systems have an economic cross-point distance between those of HVAC and HVDC. |