Microgrids-based nZEB Spain Pilot Plant

IMPROVEMENT Spanish pilot site aims to serve as demonstration site for the retrofitting of public building with critical loads through the integration of combined cooling, heating and power microgrids with enhanced power quality functionalities. The innovation approaches are applied in three different fields:

  • Power Quality Control System.
  • Comfort System.
  • Energy Management System.

These innovation approaches will be integrated at the Spanish National Center for Experimentation of Hydrogen Technologies and Fuel Cells (CNH2), located in Puertollano, Ciudad Real, South of Spain where the climatology is characterized by a strong continental component with extreme temperatures in winter and summer.

The activity of the Spanish National Center for Experimentation of Hydrogen Technologies and Fuel Cells (CNH2) is highly dependent of long-term tests oriented to validate new components, systems or processes related to hydrogen technologies. The scientific equipment destined to this activity is highly sensitive to energy quality losses.

The energy quality service in the pilot plant is guaranteed and enhanced by means of integrating a microgrid whose power flow is controlled in both modes isolated and grid-connected using a four-wire two levels voltage source inverter with active neutral control. In order to supervise perturbations of the voltage waveform in several connected loads a network of IoT energy quality sensors are integrated along the building.

The comfort system is enhanced through the installation of a geothermal recovery system connected to heat and cold energy storage system based on phase change materials.

Finally, the energy management system is based on microgrids with both solar and wind generation, hybrid electric energy storage system composed by hydrogen, batteries and ultracapacitor achieving a high power and high energy density storage system- An advanced control system is implemented in order to enhance the lifetime and economic competitiveness of the global energy storage system.

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