Beneficiary Municipality of Agios Efstratios

Implementation Centre for Renewable Energy Sources (CRES)

Program National Strategic Reference Framework 2014-2020

Funding European Regional Development Fund (ERDF)

Main target >85% RES penetration in electricity/heating

Total budget 8,5 M€ incl. VAT

Duration Mar 2017 to Jun 2022

Policy support and coverage of future needs – Green Island

With combination of various energy needs, very high RES penetration in the electrical systems of autonomous NII islands could be achieved, provided that simplified energy management strategies are adopted. To demonstrate the technical and economic feasibility of this concept, CRES is currently implementing a pilot project in Agios Efstratios, a small island of 45 sq. km located in North Aegean Sea and home to about 200 permanent residents during the winter. The island’s electricity demand relies on Public Power Corporation (PPC), which operates a local station powered by 5 diesel generators, 840 kW in total. The peak hourly load is 350 kW and the annual demand reaches 1.200 MWh. Diesel boilers are used to produce heat for single family houses and public buildings, currently estimated at 1.000 MWhth per year. There is no RES power plant on the island.

Detailed energy simulations showed that an appropriate mix of wind and solar energy combined with electrical storage could penetrate more than 85% green energy into the island’s electrical grid. However, such a high penetration leads to high amount of curtailed RES energy. To moderate this curtailment and further utilize the potential RES production, a district heating plant with thermal storage is introduced. The integrated system consists of:

  • A RES hybrid power station (wind and solar) 1,0 MW/3,0 GWh annual potential output and 1,0 MW/2,5 MWh Battery Energy Storage (BESS)
  • A district heating system from the curtailed RES energy, consisting of 800 kWth power-to-heat plant, 500 m3 thermal storage tank (=25 MWhth at ΔT=55o C) and a distribution network for the entire settlement.

RES and BESS are interconnected via a 3,0 km, 15 kV direct overhead line. The new hybrid system should have the capability to feed the island’s grid, in both islanded and parallel operation with the PPC power station, which will still remain on standby.

 

Contacts

Panagiotis Zorlos

Division of Development Programs, CRES

19th km Marathonos Ave, 19009, Pikermi Attiki Greece

Tel: +30 210 6603414
Email: pzor@cres.gr

 

Municipality of Agios Efstratios

Tel: +30 2254-093210
Email: info@agios-efstratios.gov.gr