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Gasado Island

Current status, energy mix, organizations, suppliers, equipment, controls, reported specifications, and project updates—with source-level citations.

CoverageDetailed public record
Named organizations6
System facts22
Sources reviewed10
Evidence reviewed2026-07-20

Gasado Island is Gasa-do (가사도), the same KEPCO installation represented by `gasa-island-microgrid-in-southern-korea`; it is not a second project. The October 2014 as-built system combines 314 kW of PV, four 100 kW wind turbines, three 100 kW backup diesels, and a 1.25 MW/3 MWh lithium-ion BESS. Supplier literature gives 3.2 MWh as a nominal battery figure and some summaries round PV to 320 kW. Field data show substantial diesel savings after commissioning.

Research status
Commercial operation began in October 2014. Measured records show 60,194 litres of diesel used in 2015 and 72,416 litres in 2016, respectively 77.3% and 72.7% below the 2013 comparison year. The physical installation remained an active research case in 2022 and appears in Hyosung's current completed-project references, but no later verified fuel series, availability report, battery state-of-health, or refurbishment record through July 2026 was found.
Historical classification
Community
Reported capacity
See component specifications
Coordinates
34.48158, 126.04866
Evidence note: “Every company” cannot be proven from public material alone. This page lists every organization found in the recovered record and reviewed sources, preserves unknown roles, and explicitly marks undisclosed controller or equipment details.
Report missing evidenceResearch methodology

Project delivery

Who was involved in Gasado Island?

6 publicly identified organizations. Where a recovered source named a participant without explaining its work, the role remains explicitly unspecified.

Organization

Hyosung Heavy Industries

ESS and microgrid integrator that lists Gasado as a completed 1.25 MW/3 MWh reference. [9][8]

Organization

KEPCO

Publicly named participant; role not specified in the recovered record [1]

Organization

Kokam

Battery-system supplier publishing the KEPCO Gasado reference at a nominal 1.25 MW/3.2 MWh. [4]

Organization

Korea Electric Power Corporation

Developer, majority funder, owner/operator, and supplier of the combined EMS/PMS and automatic dispatch logic. [7][3][5]

Organization

Ministry of Trade, Industry and Energy, Republic of Korea

Central-government sponsor of the KRW 9.2 billion demonstration. [7]

Organization

NPS

Manufacturer of the four 100 kW wind turbines. [10][8]

System evidence

Energy mix, capacity, and specifications

Values can describe different project phases, generation sources, storage systems, or other components. Source citations are attached to each figure so discrepancies remain visible.

KW Solar
305 [1]
KW Wind
400 [1]
KW Gas/Diesel
100 [1]
Storage
3000 kWh Lithium Ion Battery [1]
Solar PV
314 kW as built: 266 kW land/rooftop plus 48 kW floating PV; some vendor and recovered descriptions round to 320 kW [3][7]
Wind
Four 100 kW NPS turbines, 400 kW total [3][7][10]
Diesel backup
Three 100 kW sets, 300 kW total; the recovered 100 kW value is per unit [3][7]
Battery storage
1.25 MW power conversion and 3 MWh operational energy in field/Hyosung sources; 3.2 MWh nominal in Kokam supplier material [3][7][9][4]
Demand before commissioning
96 kW average, 173 kW maximum, and 61 kW minimum load [7]
Measured annual diesel use
260,847 L (2013), 214,921 L (2014), 60,194 L (2015), and 72,416 L (2016) [7]
Project investment
KRW 9.2 billion, reported as about US$7.67 million; 60% central government, 35% KEPCO, and 5% provincial funding [7]

Controls and hardware

Equipment and controller details

Manufacturer and model are shown only when a source names them. Generic descriptions are not converted into guessed product assignments.

01

Battery and PCS

Kokam / Hyosung Heavy Industries

NMC lithium-ion storage with approximately one-C capability and 4,000-cycle design life. Kokam publishes the nominal 3.2 MWh battery reference and Hyosung the 3 MWh integrated ESS reference; public evidence does not fully separate their exact subsystem responsibilities. [4][9][3][7]

02

Wind turbines

NPS

Four 100 kW permanent-magnet-synchronous machines with full converters; no reliable model number was found. [10][8]

03

Energy management system

Korea Electric Power Corporation

Integrated EMS/PMS with SCADA, weather and load forecasts, battery-SOC dispatch, direct-load control, and automatic power-flow management. [3][7]

04

Renewable and backup plant

Model not publicly disclosed

Eight PV groupings, including 48 kW floating PV, operate with four wind turbines and three retained diesel generators. PV module, inverter, and diesel-genset models are not disclosed. [3][7]

Technical record

Architecture, performance, and project updates

Concise technical facts, milestones, operating results, and later developments. Dated notes distinguish historical design claims from current evidence.

  • Storage

    Battery – Lithium Ion [1]

  • Grid formation

    The BESS PCS establishes island voltage and frequency in constant-voltage/constant-frequency mode; diesel generation is backup rather than continuously required for grid formation. [3][7][9]

  • Dispatch and controllable loads

    KEPCO's EMS uses forecasts and SOC limits to schedule energy, and can route surplus renewable output to water pumping and battery-room cooling. [3][7]

  • Measured early performance

    Field data for October 2014-March 2015 gave about 82% renewable share and about 80% lower fuel use; the longer annual series shows 77.3% and 72.7% reductions for 2015 and 2016 versus 2013. The design-stage 94% renewable target was therefore an expectation, not the demonstrated annual result. [3][7]

  • Economics

    An IDB retrospective estimated more than 25 years simple payback using roughly US$270,000 annual fuel savings, while noting the project was also a national demonstration and learning investment. [7]

  • AI study limitation

    A 2022 paper modeled distributed optimization and reinforcement-learning demand response against the Gasa system and reported a modeled 20% peak reduction. It does not prove that these controls were deployed or that field demand fell by that amount. [6]

  • Duplicate-record warning

    This slug is a duplicate spelling of `gasa-island-microgrid-in-southern-korea`. Do not sum their generation, storage, costs, or fuel savings as if they were two islands. [7][9][10]

Provenance

10 sources

Primary owner, government, university, supplier, and engineering sources are preferred. Archived references preserve claims whose original pages moved or disappeared.

  1. [1]
    Recovered Microgrid Projects record

    Internet Archive · Archived source · captured 2021-04-20

  2. [2]
  3. [3]
    Operating Schedule of Island Microgrid with Renewable Energy Resources

    Energies / Korea Electric Power Research Institute · Primary source

  4. [4]
  5. [5]
    Gasa Island microgrid demonstration

    Electric Power Research Institute · Primary source

  6. [6]
  7. [7]
    South Korea's Experience with Smart Infrastructure Services: Smart Grids

    Inter-American Development Bank · Secondary research

  8. [8]
    Operation Strategy of a Microgrid with Energy Storage System in Gasa Island

    Journal of Power System Engineering · Primary source

  9. [9]
    Microgrid Solution project references

    Hyosung Heavy Industries · Primary source

  10. [10]
    Korea South-East Power wind-generation facility inventory

    Korea South-East Power Co. · Primary source

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