The Spanish use case aims at demonstrating that a storage system shared with other users, is a safe, reliable and emission-free alternative, which will cover a gap of two hours without using a genset and thus no emissions.
The pilot will take place in Granollers since there is a secondary substation which supplies the headquarters of the DSO and a number of private households. The DSO is an example of an entity with critical services needing electricity redundancy. The issue here is that redundancy depends on the HV distribution and transmission network, meaning that in the event of a blackout impacting both, all services will be down. The current alternative is to have generator ready for use, which means storing fuel and an expensive investment.
Consumers such as hospitals, police stations, and utilities among others, which are connected to secondary substations and shared with other consumers, have specific quality of service and endurance needs. Currently most of them have an alternative feeder and generator. The use case consists in providing them with a 2 hour redundancy based on efficiently managed storage.
We consider a 2 hour capacity using batteries to be enough to cover most of incidents. The storage system, combined with the Integrated INVADE platform and Power Electronics will provide the network with a reliable and efficient energy backup, as well as a new business model for daily use by households sharing storage capacity.
The storage system, with the Integrated INVADE platform and Power Electronics ad-hoc designed, will be installed in an existing secondary substation in Granollers. The pilot will be implemented in a Secondary Substation of the Estabanell network, which supplies 158 users, of which 13 belong to the DSO services.
The neighbours will be invited to participate and share the storage system, which will be fed by the grid and also by existing PV Cells. The neighbours will be motivated to install more PV cells. The storage system will be used to manage flexibility and increase the hosting capacity of the DSO without further grid investments. The pilot will prove that storage systems can provide a business model based on flexibility management.
Stakeholders involved are the headquarter of the DSO and their neighbours. The municipality will be invited to learn about the pilot and asked to support it.
The goals are CO2 reduction, increased grid resilience without the need of further investments in networks, demand response activities and management of flexibility.