비용효과적 재생에너지 수용을 위한 BESS 및 연계망 기반 출력제한 완화 효과 연구: 제주 사례를 중심으로
© 2026 by the New & Renewable Energy
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Abstract
As the penetration of Variable Renewable Energy (VRE) continues to rise, curtailment has emerged as a paramount challenge in power system operation. This study examines the efficacy of Battery Energy Storage Systems (BESS) and the operational constraints of High Voltage Direct Current (HVDC) interconnections in mitigating VRE curtailment within the Jeju power system. Based on the deployment targets outlined in the 11th Basic Plan for Electricity Supply and Demand, scenarios for the years 2026, 2032, and 2038 were constructed. Simulations were executed using the Matpower Optimal Scheduling Tool (MOST), a power system optimization model, to evaluate the system dynamics. The analytical results indicate that in the absence of BESS, the curtailment rate in Jeju is projected to escalate to 11.0% by 2038. Conversely, the deployment of BESS as planned is expected to suppress this rate to approximately 5.1%. An economic feasibility analysis, incorporating the recent downward trend in BESS capital expenditures, demonstrates that the economic benefits derived from avoided curtailment outweigh the investment costs during the initial implementation phase, thereby securing economic viability. Furthermore, this research highlights that if the reverse transmission capacity of HVDC lines is restricted due to grid congestion in the mainland (Honam region), the curtailment rate could surge to 11.4%. These findings underscore the critical importance of ensuring grid flexibility and provide a foundational framework for determining optimal BESS sizing and operational strategies in high-penetration renewable energy environments.