Spain

The pilot is located at The Centre for the Development of Renewable Energy Sources (CEDER) – CIEMAT. It is situated only a few kilometers from the city of Soria and counts with more than 650 ha, CEDER-CIEMAT facilities are connected through a 5-km 15-kV power line arranged as a ring where the beginning and the end meet at the same point.

This line feeds 8 secondary transformer centres (TCs) which reduce the voltage to 400V AC. All these TCs are intercommunicated and connected with the Centre for Data Processing (CDP) of CEDER-CIEMAT. Moreover, the centre can be disconnected from the utility grid in order to perform off-grid tests. All elements of the microgrid are controlled and monitored in real time by an energy management system (EMS) developed ad hoc. 

Spain

The pilot is located at The Centre for the Development of Renewable Energy Sources (CEDER) – CIEMAT. It is situated only a few kilometers from the city of Soria and counts with more than 650 ha, CEDER-CIEMAT facilities are connected through a 5-km 15-kV power line arranged as a ring where the beginning and the end meet at the same point.

This line feeds 8 secondary transformer centres (TCs) which reduce the voltage to 400V AC. All these TCs are intercommunicated and connected with the Centre for Data Processing (CDP) of CEDER-CIEMAT. Moreover, the centre can be disconnected from the utility grid in order to perform off-grid tests. All elements of the microgrid are controlled and monitored in real time by an energy management system (EMS) developed ad hoc. 

CEDER-CIEMAT also has a hybrid microgrid based on DC (MVDC and LVDC) that was developed within the H2020 TIGON project. This DC grid architecture is connected to the AC CEDER smart grid via a solid-state transformer (SST) and includes the following elements:

MVDC microgrid line which includes:

  • A BSS plant.
  • Pb-Acid Batteries. A bank of 240 Vdc (120 elements of 2 V; 1080 Ah C120).

LVDC microgrid line including:

  • Wind energy generation: 1 Ryse E5 Small wind turbines are available (3.5 kW).
  • Solar Photovoltaic generation: 54 panels Ureco (410 W). Total 21.32 kW.
  • Electrochemical Energy Storage: NMC Batteries – 3 modules 80 cell each (240 cells) 3,2 V each: 768V. Capacity of 51 Ah.
  • DC loads: Loads up to 30 kW.
  • AC loads: 3 programmable AC Loads (2.9 kW each) connected through an 800 Vdc / 230 Vac converter (8.7 kW). Loads.

AC microgrid line including:

  • The connection to all the above systems through power converters in order to be able to develop an AC operation of these systems. 
  • AC loads: office building lighting, heating and cooling systems.

All the distributed resources (generation systems, storage systems and loads) will be connected to a main control centre but can be accessible in a decentralized way from any point of the communication network for control (run/stop the systems, send command values, etc.) and monitoring (state, electric power, etc.) purposes. The micro-grid will have a smart metering network system, which implies a wide deployment of Smart Meters (SM) located in strategic points within electric grid, to monitor the multiple distributed resources.