Dugi Rat - Postira
Island LinkOperationalHR136 MW110 kV7.3 km1968
Also 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:Hrvatski operator prijenosnog sustava d.o.o. (HOPS)
Type:island link
Expected Life:35 years
Website:www.koncar.hr
Dugi Rat – Postira is a 110 kV AC (HVAC) submarine transmission link that connects the Croatian mainland near Dugi Rat to the 110/35/10(20) kV substation at Postira on the island of Brač. The project is a priority element of HOPS’s programme to replace ageing paper‑oil insulated submarine cables in...
Supply Chain (1)
Project Timeline (10)
4 Mar 2022Cable 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.
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.
HRK490M
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.
Date TBDOnshore Construction Start
As part of the 110 kV cable replacement project between Brač (Postira) and the mainland at Dugi Rat, onshore construction works were carried out, including coastal protection and installation of underground cable sections from the sea–land joints to the transition into the overhead line, following the issuance of a building permit in 2014.
Date TBDOnss Commissioned
The Splitsko-dalmatinska County Department for Construction and Spatial Planning issued a use permit (uporabna dozvola) to investor HOPS d.d. for the completed energy infrastructure facility replacing the 110 kV submarine cable link Dugi Rat–Postira (island of Brač). This decision authorises the use of the newly built transmission asset on the specified cadastral parcels at Dugi Rat and Postira, marking completion of commissioning of the onshore connection facilities associated with the cable.