Brac - Hvar
Island LinkOperationalHR136 MW110 kV4.5 km1970
Also known as:Brač – Hvar 110 kV podmorski kabel, Brac – Hvar 110 kV submarine cable, KB 110 kV Brač – Hvar, KB 110 kV Hvar – Brač, Adriatic Sea Islands Interconnection Brač–Hvar section
Status:Operational
Capacity:136 MW
Project Company:Hrvatski operator prijenosnog sustava d.d. (HOPS)
Type:island link
Expected Life:35 years
Website:www.hops.hr
Brac–Hvar (Prapatna–Medvidbad) is a 110 kV AC submarine cable link that replaces ageing oil‑filled 110 kV cables and modernises the high‑voltage transmission connection between the islands of Brač and Hvar. The replacement was delivered under HOPS’s national NPOO / Recovery & Resilience programme for island cabling and forms part of...
Supply Chain (2)
Project Timeline (11)
26 Jul 2024Onss Commissioned
For the Brac–Hvar 110 kV interconnector, HOPS completed replacement of the submarine cable and reconstruction of the associated onshore cable stations in 2024; the new cable was put into operation in May 2024, and following testing, measurements and technical inspection, a usage permit for the assets was obtained on 26 July 2024, marking full commissioning of the reconstructed cable stations.
2 Apr 2024Cable Installation Complete
Asso.subsea announced the successful completion of a cable installation project in Croatia for contractor Končar on behalf of HOPS, which included replacing the existing 110 kV submarine cable system on the Brač–Hvar interconnector between Prapatna and Medvidbad with new 3×630 mm² submarine cables as part of a four‑system, ~30 km programme. The works covered transportation and laying of the new high‑voltage cables in water depths up to 70 m, fully renewing the old Brač–Hvar link within the southern section connecting the islands of Brač, Hvar and Korčula; subsequent HOPS documentation on energy and CO₂ savings confirms the replacement of the 110 kV Brač–Hvar cable had been carried out.
2 Apr 2024Cable Landfall Complete
As part of the renewal of the 110 kV submarine cable systems including the Brač–Hvar interconnector, Asso.subsea completed demanding shore‑end works and landfalls at the island landing sites, with onshore pull‑in operations preceded by preparation works and use of HDD pipes at two locations and custom‑designed rollers to manage steep slopes up to 40%. The company reports that its cable‑lay vessel Atalanti and onshore teams successfully executed three consecutive landing activities, indicating completion of landfall operations for the new Brač–Hvar and associated island cable links.
22 Jan 2024Cable Installation Start
On 22 January 2024, Hrvatski operator prijenosnog sustava (HOPS) commenced works to replace the existing 110 kV submarine interconnector cable between the islands of Brač and Hvar, as part of a wider project also covering the Hvar–Korčula link. The activities include laying and jointing new, higher-capacity XLPE-insulated submarine and associated land cables, and removing the old oil-insulated cables, with works scheduled to continue until mid-June 2024 to improve security of supply and enable greater integration of renewable energy on the islands.
22 Jan 2024Onshore Construction Start
On 22 January 2024, Croatian transmission system operator HOPS commenced works to replace the 110 kV submarine cables between the islands of Brač and Hvar and between Hvar and Korčula, including associated onshore cable sections and refurbishment of cable houses, with activities expected to run until mid-June 2024 to increase transmission capacity and improve long-term security of supply.
2024Operations Other
In its 2024 sustainability report, HOPS published energy‑efficiency and CO₂‑reduction assessments ('elaborati') for the replacement of the 110 kV Brač–Hvar submarine cable, quantifying the reduced transmission losses and associated annual emission reductions. The report notes that the new Brač–Hvar cable delivers significant energy savings and cuts CO₂ emissions by about 317 tonnes per year, demonstrating the operational benefits of the revitalised interconnector.
6 Jul 2021Cable Supplier Selected
On 6 July 2021, Hellenic Cables signed a contract with Croatian contractor Končar Group to supply 12 km of 110 kV submarine cables, accessories and related services for a Croatian Transmission System Operator project replacing outdated cable lines in the Adriatic Sea, including infrastructure serving islands such as Brač. This selection secures the cable supply for the submarine interconnection and is intended to enhance energy security and enable new renewable energy installations on the Croatian islands.
2019Financial Other
In the Ten-Year Transmission Network Development Plan 2019–2028, HOPS launched the strategic project “Replacement of 110 kV submarine cables”, covering all island 110 kV links including the Brač–Hvar (Slatina–Travna) section. The plan foresees a total investment of around 490 million HRK for simultaneous replacement of these cables and associated infrastructure, with HOPS intending to secure roughly 70% of the funding from non‑repayable EU funds and to complete all works in the 2019–2021 period.
HRK490M
25 Nov 2014Eia Submitted
Authority: Ministarstvo zaštite okoliša i prirode (Ministry of Environmental and Nature Protection) · Licence: Request for screening on the need for environmental impact assessment for reconstruction of the 110 kV submarine cable Slatina–Travna
On 25 November 2014, the project promoter Hrvatski operator prijenosnog sustava d.o.o. submitted to the Ministry of Environmental and Nature Protection a request to carry out a screening on the need for an environmental impact assessment for the reconstruction of the 4.54 km 110 kV submarine cable link Slatina (island of Brač) – Travna (island of Hvar), attaching an Environmental Protection Study prepared in October 2014 by Institut IGH d.d., Regional Centre Split.
1970Commercial Operations Full Power
As part of the development of the South Dalmatian "Južna otočna petlja" island transmission loop in the period 1968–1978, a 110 kV oil‑filled submarine cable link between Slatina on Brač and Travna on Hvar (length 4,544 m, 100 MVA rating) was put into service in 1970, providing the high‑voltage transmission interconnection between the islands of Brač and Hvar via the Stari Grad–Nerežišća 110 kV line and associated submarine section.