Construction Work
- New Substations
- Upgrades to Substations
- Overhead Power Lines
- Undergrounding of existing transmission lines
- Other Transmission network projects at a preliminary stage
1.New substations
Commissioning of new substations
During the year under review, commissioning work was completed on the new Omonia 132/11kV substation in Limassol which has a capacity of 80MVA (2x40MVA).
New substations under development
132/22-11kV Ayios Athanasios substation.Work on the 132/22-11kV Ayios Athanasios substation in Limassol has almost finished. Installation of the transmission cables will be complete by the end of January 2008 and the required commissioning tests will be carried out. The substation is due to come into operation in February 2008.
220/132 kV Tseri substation.Construction work on the substation was completed in August 2007. The electrical equipment includes only GIS switchgear, protection panels and a fully automatic monitoring system. The substation will operate as a branch without transformers and a medium voltage distribution panel. It is due to come into operation in April 2008.
132/22-11kV Trimiklini substation.Construction work on the substation is due to start in June 2008 and to finish in September 2009. Immediately afterwards, installation of the electrical equipment will begin. This will include a 132kV-66kV interbus transformer and two 16MVA, 66/11.5kV transformer circuits. The substation is due to come into operation in summer 2010.
132/22-11kV Amathus substation .In September 2007 construction work began on the substation with a predicted duration of 12 months. The electrical equipment will be delivered shortly and its installation is expected to start in autumn 2009.
132/22-11kV Lakatamia substation.The tendering process is under way for construction of the substation and for the supply of electrical equipment. Two 40MVA, 132/23-11.5kV transformer circuits, four line circuits and a 30-position circuit breaker panel will be installed.
2.Upgrades to substations
Completed upgrades
66/11kV Kophinou substation.Upgrading work on the 66/11kV Kophinou substation was completed in November 2007 following the commissioning of a 2nd 10,5/15MVA transformer circuit. The reinforcement included the construction of 132kV links, the replacement of 2x5 MVA transformers by 2x15MVA, the construction of a control room and the installation of automatic 132kV και 11kV circuit breakers.
Ongoing upgrades
132/11kV Dhekelia substation .Due to the installation of additional alternators in the Dhekelia substation in order to meet generation requirements, the new GIS equipment will operate at 132kV instead of 66kV as originally scheduled and two new 40MVA, 132/23-11.5kV transformers will be installed. All the procedures for awarding tenders for construction work on the substation are currently under way.
132/11kV Alambra substation.Extensions to the substation’s 132kV busbars have been completed. Work continues on the installation of the 3rd 16 MVA transformer circuit.
Episkopi, Pissouri and Xeropotamos substations.The existing 66/11kV Episkopi, Pissouri and Xeropotamos substations are being totally renovated and upgraded to 132/22-11kV. The Xeropotamos substation will be relocated to new premises that have already been procured. Work on the first phase of the Epiksopi substation was completed in October 2007.
The upgrade includes the construction of 132kV busbars, the replacement of transformers, the construction of a control room and the installation of automatic 132kV and 11kV circuit breakers.
3.Overhead power lines
New construction
Vassilikos-Tseri 220/132kV overhead power line.Construction is at an advanced stage of the Vassilikos-Tseri double circuit 220kV overhead transmission line with two Rubus conductors per phase. The 132kV will be connected to the overhead transmission network of the interconnecting Athalassa and Orounta Stations.
Ypsonas-Trimiklini 132kV overhead power line.Plans for the new 132kV double circuit overhead transmission line are complete. Planning permission, government approval and access permission have all been obtained. Specifications are now being drawn up for tenders to be invited in 2008 for construction of the project.
This project is considered to be extremely important as regards the uninterrupted supply of electricity to the broader Troodos region.
Upgrades/Relocations of overhead power lines
Relocation of the Dhekelia-Ayios Nicolaos and Dhekelia-Protaras 132kV overhead power lines .Work on relocating transmission lines outside residential areas in the Ormidhia district began in summer 2007 and are expected to be completed in March 2008.
Kolossi-Anatoliko 132kV overhead power line.Work on relocating transmission lines outside residential areas in the Timi district is due to begin in January 2008 and to be completed by June 2008.
Stroumbi-Polis 132kV overhead power line.Plans have been drawn up for the upgrading of the 66kV overhead transmission line to a double circuit 132kV line. Planning permission and government approval have been obtained and we are now at the stage of gaining access permission. A call for tenders for the construction of the project will be published in 2008.
4.Undergrounding
of existing transmission lines
In 2008 work will begin on installing 132kV underground cables from the Athalassa substation to the Strovolos Industrial Estate and the roundabout near the psychiatric hospital which will replace the 132kV Athalassa-Strovolos and Athalassa-Dasoupolis overhead lines.
Also, during 2008 a call for tenders will be issued for the undergrounding of the 132kV Moni-Germasogeia-Agia Fyla-Polemidia overhead line which crosses the greater Limassol area from the Moni Substation to Polemidia. The first phase of the project is expected to start at the end of 2008 or early in 2009.
5.Other transmission network projects at a preliminary stage
Work is at a preliminary stage on the following:
- Establishment of the Paphos substation
- Establishment of the Ikaria substation
- Estabishment of a reactive power compensation system at the Tseri substation.