Technical and economical evaluation of the Greek pilot micro-grid

PART OF PEGASUS PROJECT

Discover a new projects in Greece under the PEGASUS programme – Promoting Effective Generation and Sustainable USes of electricity

In the framework of Work Package 3 “Testing” of the PEGASUS project, the measuring equipment for the pilot project of Mega Evydrio community has already been installed and has provided the set of measurements. This report documents the technical and economical evaluation of the Greek pilot microgrid, under different operating modes.

The Greek pilot microgrid is planned to be installed near the city of Farsala – in the Mega Evydrio community – and it is going to have one single point of common coupling (PCC) with the main electricity grid. It is going to be organized as a local “energy community”, where the municipality of Farsala and the residents of the community of Mega Evydrio are going to participate.

The micro-grid configuration

The present situation for the Greek pilot before the establishment of the micro-grid is the following:

 The consumers buy electricity from the main grid
 The producers sell electricity to the main grid
 The prosumers buy electricity from the main grid in a net metering basis (consumption – production). If production is higher than consumption they don’t earn money for the surplus of electricity

The situation after the establishment of the micro-grid for the Greek pilot will be the following:

 An “Energy Community” will operate the micro-grid. In the “Energy Community” will participate the local municipality, local residents, local shop owners, local electricity producers, and various other interested parties.

The Energy Community will proceed with the purchase of:

a) the new PV systems (177.5 kWp);
b) the necessary software, i.e. Energy Management System (EMS);
c) the point of common coupling (PCC).

The amount for the investment will come from the members of the energy community, from loans and from grants. After the start of the microgrid/energy community:

 the microgrid buys electricity from the main grid (and the producers / procumers), following a ‘net metering’ procedure,
 the microgrid sells electricity to the consumers /prosumers, and
 consumers buy electricity from the micro-grid with a discount of x % (compared to the main grid prices),
 producers sell electricity to the micro-grid with a premium of y % (compared to the main grid prices), while
 prosumers buy electricity from the micro-grid (consumption – production); if their production is higher than consumption they sell electricity to the micro-grid at a fixed price of z cents/kWh

The net metering is calculated for a period of 1 year for:

 grid – prosumers (before the micro-grid),
 grid – micro-grid (after the micro-grid)


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Technical and economical evaluation of the Greek pilot micro-grid for each operating mode

CRES_technical-and-economical-evaluation_V2-_final.pdf