CEDER-CIEMAT’s microgrid is underpinned by a 45 kV power line and serves a 45/15 kV (1,000 kVA) substation. From this substation, medium-voltage power is distributed via an underground network to eight transformer substations, which adjust the power to a low-voltage, three-phase supply delivering 400 V.
The network can operate as a ring, enabling a medium-voltage perimeter some 4,200 metres long, and also as a radial network.
All of the components that comprise the systems for distributed generation, distributed electricity storage and load are connected at low voltage.
In terms of demand, the Centre offers a number of different consumption profiles, similar to those that can be found in an industrial environment, a services environment and even a domestic environment.
- DISTRIBUTED GENERATION SYSTEMS
- STORAGE SYSTEMS
- LOADS AND CONSUMPTION
Unregulatable generation systems
ATLANTIC AOC wind turbine: 50 kW, 15 metres diameter.
Photovoltaic systems: There are eight different photovoltaic systems connected to the microgrid.
- Building E01: 80 x 150 W monocrystalline silicon panels, providing a total of 12 kW.
- Building E03: 54 photovoltaic panels, comprising 36 x 240 W monocrystalline panels and 18 x 230 W polycrystalline panels, providing a total of 12.6 kW.
- Building E09: 238 x 97 W thin film panels, providing a total of 23.2 kW.
- The LECA building houses two different systems:
- LECA 1: 63 x 310 W polycrystalline panels, providing a total of 19.5 kW.
- LECA 2: 63 x 310 W polycrystalline panels, providing a total of 19.5 kW.
- PEPA III: 24 x 210 W polycrystalline panels, providing a total of 5 kW.
- Turbine area: 64 x 250 W monocrystalline panels, providing a total of 16 kW.
- Energysis area: 64 x 140 W polycrystalline panels, providing a total of 8.9 kW.
Regulatable generation systems
- CEDER's microgrid is equipped with a GEN 110FC engine generator providing 100 kVA of power.
Reversible hydraulic system
- Reversible hydraulic system comprising a Pelton turbine connected to a 60 kW electric generator and a pumping system.
Comprised of four 7.5 kW pumps and three water-storage tanks with a total capacity of 2,000 m3 and total elevation change of 86 metres.
- PEPA I battery system: comprised of 120 sets of 2 V Tudor 7EAN100T lead-acid batteries, with a capacity of 1,080 Ah over 120 hours (120C).
- PEPA II battery system: comprised of 120 sets of 2 V Tudor 7 OPzS 490 lead-acid batteries, with a capacity of 765 Ah over 120 hours (120C).
The system comprises two racks of 14 modules, with 14 cells per module. The system provides a nominal capacity of 50 Ah, nominal voltage of 3.2 V and nominal power of 160 Wh (one hour) per cell; and nominal capacity of 50 Ah, nominal voltage of 627.2 V and nominal power of 31.36 kW (one hour) per rack.
Loads are the elements that enable CEDER’s day-to-day operation, i.e. the various buildings and equipment (motors, lighting, boilers, laboratories, etc.) that make up the Centre and require energy in order to function. All of the loads are connected to the low-voltage network.
All of the system's consumption data is provided online by eight Ethernet-connected analysers. An analyser is installed on the low-voltage side of each transformer substation.