All Issue

2026 Vol.36, Issue 1 Preview Page

Research Article

Surplus Energy Assessment and UTES Site Selection via Integrated Renewable Generation Potential and Electricity Demand Analysis

신재생발전 잠재량-전력 수요 통합 분석 기반 잉여에너지 산정 및 UTES 입지 선정

Junkyo Kim1
,
Hyeong-Dong Park23*
김 준교1
,
박 형동23*
1Master’s Student, Department of Energy Systems Engineering, Seoul National University
2Professor, Department of Energy Resources Engineering, Seoul National University
3Participating Professor, Research Institute of Energy and Resources, Seoul National University
1서울대학교 에너지시스템공학부 석사과정
2서울대학교 에너지자원공학과 교수
3서울대학교 에너지자원신기술연구소 참여교수
*Corresponding Author
31 March 2026. pp. 31-43
PDF XML Citation
Abstract

To address renewable energy variability across the Korean Peninsula, this study identifies optimal curtailment mitigation sites on Jeju Island, a region with the nation’s highest renewable energy penetration and rising curtailments. As a potential solution, Underground Thermal Energy Storage (UTES) is proposed, based on analysis of site suitability via surplus energy assessment and geological column assessment. Surplus energy was calculated by integrating Geographic Information System (GIS) and Typical Meteorological Year (TMY)-based solar and wind resource assessments with Jeju electricity demand data. Over 3,000 surplus events annually, exceeding 500 GWh in total, were estimated in Namwon-eup and Andeok-myeon. To store this surplus energy, basalt layers with volumes of 41,200 m3 and 34,300 m3, respectively, are required. Geological column analysis confirmed the presence of formations capable of accommodating these volumes, and the corresponding sites were selected as optimal locations for UTES installation.

Keywords
sector coupling
curtailment
surplus energy
underground thermal energy storage
renewable energy

한반도 재생에너지 변동성 대응을 위해 제주도를 대상으로 출력제한 대응 체계 적지를 분석하였다. 제주도는 국내 신재생에너지 비중이 가장 높아 출력제한 문제가 심화되고 있다. 본 연구는 변동성 대안으로 지중 열에너지 저장(Underground Thermal Energy Storage, UTES)을 제안하고 잉여에너지 산정과 시추지질주상도 분석을 통해 최적 입지를 도출하였다. 잉여에너지 산정은 Geographic Information System (GIS)와 Typical Meteorological Year (TMY) 기반 태양광·풍력 잠재량 추정, 제주 전력 수요 데이터를 종합 분석하여 수행하였다. 분석 결과 남원읍과 안덕면에서 연간 3,000회 이상, 500 GWh 이상의 잉여에너지 발생을 추정했으며, 저장을 위해 각각 41,200 m3, 34,300 m3의 현무암 지층이 필요함을 확인하였다. 시추지질주상도 분석을 통해 해당 부피를 확보할 수 있는 지형을 확인하여 설치 적합

키워드
섹터커플링
출력제한
잉여에너지
지중열저장
신재생에너지
References
1

Cooney, C., Byrne, R., Lyons, W., O’Rourke, F., 2017, Performance characterisation of a commercial-scale wind turbine operating in an urban environment, using real data, Energy for Sustainable Development, 36, 44-54.

10.1016/j.esd.2016.11.001
2

EGIS (Environmental Geographic Information Service), 2024, Land cover classification map (medium category), Retrieved from https://aid.mcee.go.kr/map/map.do (in Korean).

3

Jorand, R., Vogt, C., Marquart, G., Clauser, C., 2013, Effective thermal conductivity of heterogeneous rocks from laboratory experiments and numerical modeling, Journal of Geophysical Research: Solid Earth, 118(10), 5225-5235.

10.1002/jgrb.50373
4

JPDC (Jeju Special Self-Governing Province Development Corp.), 2020, Highly permeable geological structures in Jeju Island, Retrieved from https://www.data.go.kr/data/15073424/fileData.do (in Korean).

5

JWAMH (Jeju Province Metropolitan Water Resources Management Headquarters), 2001, Jeju Island geological column section archive (1970-2000), 988p (in Korean).

6

KEEI (Korea Energy Economics Institute), 2025, World energy market insight (Vol. 25-6), 73p (in Korean).

7

KEPCO (Korea Electric Power Corporation), 2025, Electricity usage by contract type and legal/administrative district, Retrieved from https://bigdata.kepco.co.kr/cmsmain.do (in Korean).

8

Kim, H.C., Hwang, J.H., Baek, S.G., 2019a, Map of specific heat capacity of rocks in Korea (1:1,700,000), Korea Institute of Geoscience and Mineral Resources, Retrieved from https://doi.org/10.22747/data.20201218.1522 (in Korean).

10.22747/data.20201218.1522
9

Kim, J.C., Kim, K.N., 2018, Study on the regional differences of optimal orientation and tilt angle for photovoltaic systems: Simulations by a system advisor model, New & Renewable Energy, 14(2), 9-20 (in Korean with English abstract).

10.7849/ksnre.2018.6.14.2.009
10

Kim, J.H., 2006, A study on the mechanical characteristics and the strength in Pyoseonri basalt, MSc Thesis, Cheju National University, 14 (in Korean with English abstract).

11

Kim, N., You, Y.K., Jeon, B.C., Kim, D.S., 2019b, A proposal of classification and evaluation method of pollution vulnerabilities by a highly permeable terrain in Jeju Island, Journal of the Geological Society of Korea, 55(2), 247-256 (in Korean with English abstract).

10.14770/jgsk.2019.55.2.247
12

KPX (Korea Power Exchange), 2025a, Annual electricity grid operation performance in Jeju 2024, 14p (in Korean).

13

KPX (Korea Power Exchange), 2025b, Korea power exchange_hourly electricity demand of Jeju, Retrieved from https://www.data.go.kr/data/15065239/fileData.do (in Korean).

14

La Guardia, M., D’Ippolito, F., Cellura, M., 2022, A GIS-based optimization model finalized to the localization of new power-to-gas plants: The case study of Sicily (Italy), Renewable Energy, 197, 828-835.

10.1016/j.renene.2022.07.120
15

Lanahan, M., Tabares-Velasco, P.C., 2017, Seasonal thermal-energy storage: A critical review on BTES systems, modeling, and system design for higher system efficiency, Energies, 10(6), 743.

10.3390/en10060743
16

MOEF (Ministry of Economy and Finance), 2020, Geographic Information System, Dictionary of Current Economic Terms, Retrieved from https://www.moef.go.kr/sisa/dictionary/detail?idx=2370 (in Korean).

17

MOLIT (Ministry of Land, Infrastructure and Transport), 2023, Management of development restriction zone designatioin/restricted development zone, Retrieved from https://www.vworld.kr/dtmk/dtmk_ntads_s002.do?svcCde=MK&dsId=30261 (in Korean).

18

MOTIE (Ministry of Trade, Industry and Energy), 2025, The 11th basic plan for electricity supply and demand (2024-2038), 120p (in Korean).

19

Nahhas, T., Py, X., Sadiki, N., 2019, Experimental investigation of basalt rocks as storage material for high-temperature concentrated solar power plants, Renewable and Sustainable Energy Reviews, 110, 226-235.

10.1016/j.rser.2019.04.060
20

Nam, J.M., Kim, J.H., 2006, A study on the mechanical characteristics and the strength in Pyoseonri basalt, Bulletin of the Marine Environment Research Institute, 30(2), 35-47 (in Korean with English abstract).

21

NASA, METI, AIST, Japan Spacesystems and U.S., Japan ASTER Science Team, 2019, ASTER Global Digital Elevation Model V003 [Data set], NASA Land Processes Distributed Active Archive Center, Retrieved from https://doi.org/10.5067/ASTER/ASTGTM.003.

10.5067/ASTER/ASTGTM.003
22

NCSRD (National Center for Standard Reference Data), 2023a, Measuremnet based TMY (Gangneung, Seoul, Daejeon, Daegu, Jeju), Retrieved from https://doi.org/10.20925/KSRD.61275477.v4 (in Korean).

10.20925/KSRD.61275477.v4
23

NCSRD (National Center for Standard Reference Data), 2023b, Model based TMY (300km^2 scale, 200 spots), Retrieved from https://doi.org/10.20925/KSRD.41625933.v1 (in Korean).

10.20925/KSRD.41625933.v1
24

Ohunakin, O.S., Adaramola, M.S., Oyewola, O.M., Fagbenle, R.O., 2013, Generation of a typical meteorological year for north-east, Nigeria, Applied Energy, 112, 152-159.

10.1016/j.apenergy.2013.05.072
25

Sadeghi, H., Jalali, R., Singh, R.M., 2024, A review of borehole thermal energy storage and its integration into district heating systems, Renewable and Sustainable Energy Reviews, 192, 114236.

10.1016/j.rser.2023.114236
26

Santana-Sarmiento, F., Velázquez-Medina, S., 2024, A method based on GIS techniques to assess renewable energy self-consumption capacity. A case study, Energy, 305, 132246.

10.1016/j.energy.2024.132246
27

Swisher, P., Murcia Leon, J.P., Gea-Bermúdez, J., Koivisto, M., Madsen, H.A., Münster, M., 2022, Competitiveness of a low specific power, low cut-out wind speed wind turbine in North and Central Europe towards 2050, Applied Energy, 306(Part B), 118043.

10.1016/j.apenergy.2021.118043
28

Zandi, I., Pahlavani, P., Lotfata, A., Ata, B., 2025, A GIS-based fermatean fuzzy MCDM approach for identifying the optimal sites for solar power plant installation in Kermanshah Province, Scientific Reports, 15(1), 33245.

10.1038/s41598-025-19058-841006637PMC12475117
Information
  • Publisher :Korean Society of Engineering Geology
  • Publisher(Ko) :대한지질공학회
  • Journal Title :The Journal of Engineering Geology
  • Journal Title(Ko) :지질공학
  • Volume : 36
  • No :1
  • Pages :31-43
  • Received Date : 2026-01-14
  • Revised Date : 2026-02-09
  • Accepted Date : 2026-02-12
  • DOI :https://doi.org/10.9720/kseg.2026.1.031
Journal Informaiton The Journal of Engineering Geology The Journal of Engineering Geology
Online Submission
  • NRF
  • KOFST
  • KISTI Current Status
  • KISTI Cited-by
  • crosscheck
  • orcid
  • open access
  • ccl
Journal Informaiton Journal Informaiton - close