Dugi Rat - Postira
OperationalIsland LinkHR136 MW110 kV7.3 km1968
Basic information
8 fieldsAlso Known As
110 kV podmorski kabel Dugi Rat – Postira · podmorski kabel Dugi Rat – Postira · KB 110 kV Dugi Rat – Postira · OHL KB 110 kV Dugi Rat – Postira · KS Dugi Rat – KS Postira
Status
operational
Capacity
136 MW
Project Company
Type
island link
Expected Life
35 years
Website
Supply Chain (1)
Project Timeline (12)
4 Mar 2022Replacement Cable Supplier Selected
Croatian Transmission System Operator (HOPS) engaged KONČAR - Engineering, within a wider consortium agreement valued at EUR 65 million (of which EUR 33.8 million pertains to KONČAR), to execute the 110 kV submarine cable replacement programme, including the Postira (Brač) – Dugi Rat section of 7,300 metres. The first phase of this strategic investment project, covering the Brač–Dugi Rat and Krk–Crikvenica sections and worth EUR 12 million, is led and spearheaded by KONČAR - Engineering, confirming its role as the selected supplier/contractor for the submarine cable works on the Dugi Rat – Postira interconnector.
23 Feb 2022Cable Installation Start
On 23 February 2022, the Croatian Transmission System Operator (HOPS), with KONČAR – Engineering as contractor, started laying the first 7,300‑metre 110 kV submarine cable between Postira on the island of Brač and Dugi Rat on the mainland, marking the beginning of the Dugi Rat – Postira interconnector cable replacement. The works form the first phase of a strategic project to replace aging 110 kV submarine cables on Adriatic islands, financed through the National Recovery and Resilience Plan to secure reliable electricity supply.
2021Major Maintenance
HOPS initiated a strategic "Project for replacement of 110 kV submarine cables" to replace all aging oil‑filled 110 kV island links, including the Dugi Rat–Postira section, with new environmentally friendlier XLPE‑insulated three‑core cables, with works planned to be intensified and completed in the 2019–2021 period and largely financed from EU funds. The European Commission later recorded the Dugi Rat–Postira connection as having been upgraded under this investment programme, indicating that this major asset renewal campaign on the link has been executed, with the new cable designed for a transmission capacity of 122 MVA.
2019Financial Other
In its 2019–2028 Ten-Year Transmission Network Development Plan, Croatian transmission system operator HOPS launched the strategic “Project for replacement of 110 kV submarine cables”, covering all 110 kV island links including the Dugi Rat – Postira connection, with a total estimated investment of about HRK 490 million and an intention to finance around 70% of the costs with non-repayable EU funds, for which discussions with Croatian government ministries were ongoing.
15 Oct 2014Planning Consent Awarded
Authority: Upravni odjel za prostorno uređenje, Splitskodalmatinske županije · Licence: Potvrda glavnog projekta (akt za građenje građevine)
On 15 October 2014, the Spatial Planning Department of Split-Dalmatia County issued a confirmation of the main design (Potvrda glavnog projekta), as the building act (akt za građenje), for the replacement of the 110 kV submarine cable connection Dugi Rat – Postira (island Brač), authorising construction of the electricity transmission infrastructure on the specified cadastral parcels in Duće (Dugi Rat) and Postira.
Apr 2013Early Development Other
By April 2013, distribution operator HEP‑ODS had prepared a second revised project task document (Projektni zadatak, II novelacija) for the replacement of the 110 kV Dugi Rat – Postire submarine cable, formalising the technical scope and requirements for installing a new XLPE‑insulated link.
4 Jan 2011Major Outage
On 4 January 2011 a fault occurred on the 110 kV Dugi Rat–Postira submarine cable, after which operators determined that the failure could not be repaired, leaving the cable out of service and prompting the need for full replacement with a new XLPE‑insulated link. The outage removed the original 1968 oil‑filled three‑core cable from operation on the mainland–Brač I (Dugi Rat–Postira) route.
1968Commercial Operations Full Power
In 1968, the 110 kV submarine cable link Dugi Rat–Postire (KB 110 kV Dugi Rat–Postire) entered service as the first 110 kV mainland–Brač connection (“kopno–Brač I”), with a length of 8,662 m. This cable, built as part of the 110 kV island transmission loop developed between 1968 and 1978, integrated Brač into the high‑voltage Adriatic island network between TS 110/35 kV Dugi Rat and downstream island substations.
Date TBDCapital Support Awarded
Under Croatia’s Recovery and Resilience Plan measure C1.2.R1‑I1, the European Union provided capital support to HOPS for the investment "Upgrade of underground cables connecting islands to the mainland grid", which financed the replacement of six 110 kV submarine paper‑oil cables, including the Dugi Rat – Postira link, with new environmentally friendly XLPE-insulated cables; the project entry records HOPS as one of the top 100 recipients and notes that the upgraded Dugi Rat – Postira interconnection has been completed.
Date TBDCable Installation Complete
Under Croatia’s EU Recovery and Resilience Plan, the independent transmission system operator HOPS completed the replacement of the existing 110 kV oil‑filled three‑core submarine cable between Dugi Rat and Postira with a new three‑core XLPE‑insulated cable, upgrading this island‑mainland electricity network connection as part of a wider Adriatic submarine cable renewal programme.