Dedicated spotlights on technical results of the GRID4EU Demo 6 are available via the following downloadable articles:
Within the Grid4EU project, the French DEMO6, also called the Nice Grid project , is located in Carros (far southeast of France, close to Nice). Carros is located on the periphery of France’s transmission grid, which is a structural handicap for its electricity supply: local production is highly insufficient to meet demand; a significant part of the consumed electricity is imported from other regions through a single entry point for the National 400kV network (which has today reached its saturation level at peak times, especially during winter hours, with a risk of voltage collapse). The demonstration is performed under the coordination and management of ErDF, with the collaboration of other DEMO6 partners: ALSTOM, ARMINES and EDF.
In addition to the transmission network reinforcement undertaken by the French TSO RTE, the Nice Grid project should contribute to secure and improve the electric supply quality in this region by:
- Designing a significantly sized smart grid (1500 customers) with a massive integration of DER into distribution grid (photovoltaic production) and integration of small-scale storage enabling to test several distributed resources control levels, until the islanding;
- Quantifying the impact of coordinated actions over the grid capacity to absorb the transited energy, while maintaining power quality and security expected on the regional grid which is another challenge for the grid management;
- Favoring the emergence of new, sustainable consumer behaviours, testing demand response according to network flexibility constraints and deposits.
The Nice Grid project uses innovative communication infrastructure energy production facilities and small-scale storage technologies to build a smart grid on a significant scale. The grid’s already substantial solar power resources will be supplemented by:
To meet Nice Grid challenges, four use cases have been defined:
1 - Reduction of power demand (1500 customers on MV and LV networks). The objective of this use case is to develop and test management tools for customers’ production and consumption :
2 - Management of mass production PV panels (200 customers on LV network). The objective of this use-case is to test the impact of DER on distribution networks:
The technical and economic interest of distributed electric storage at different integration levels will be studied to solve PV integration problems.
3 - Islanding (12 customers on the LV network with a single MV/LV transformer). This use case aims to show that a defined network area can operate independently and be disconnected from the electrical network to which it is connected in a normal situation. This type of operation will be used by the DSO to test this specific situation of the network, in some prepared, anticipated and favourable situations, with the support of storage devices.
4 - Customer information (1,500 customers on LV and MV networks). Thanks to the extensive use of Linky smart meters, solutions to inform and advise residential customers about their production, consumption and/or batteries storage level, will be tested to assess consumer behaviour and to create the conditions for the participation of customers in demand response.
Blue area - Full scope of the pilot project: as many as 1,500 customers in Carros providing a total load shedding and battery discharge capacity of 5 MW and supplied with four MV feeder lines.
Orange area - Smart solar district: consists of up to 200 customers equipped with photovoltaic arrays as a test of the optimal balance at the local level between energy consumption, production and storage.
Yellow area - Islanded mode of operation
test zone: a group of customers who may be isolated from the main grid. This group of customers, which corresponds to the population served by a public distribution substation, uses its photovoltaic generation to meet local power requirements when necessary.
Figure 1. Target architecture of Nice Grid demonstrator
For more information, please see
 Nice Grid is also funded by ADEME (French Agency for Environment and Energy Management). See http://www.nicegrid.fr/.