Microgrids are small-scale electricity production and distribution grids, which can operate as a part of or individually from (island mode) the regular grid. They provide new options for managing distribution, local optimization of energy supply, and for incorporating distributed and renewable energy resource (DER). Microgrids are also expected to play an important role globally in the context of rural electrification.
CINELDI develop concepts, technologies and solutions for optimal design, operation, and integration with the distribution system. In order to achieve this, solutions and technologies need to be tested and verified in real environments.
Transition to and from island mode
Utsira: An islanded grid on an island
A microgrid’s ability to transition to and from island mode is crucial. CINELDI and Skagerak Nett are piloting both planned and unplanned transitions at Skagerak Energilab. The lab is ideal for this sort of testing as it’s connected to Skagerak Nett’s grid, and can be run as a microgrid due to its 1,1 MWh battery system.
The pilot is considered a success if the customers are unaffected by the transition and Skagerak Nett avoids CENS (cost of energy not supplied). The first planned test was performed in September 2020, and preliminary results indicate no customers were affected.
Contact person at Skagerak Nett:
Utsira is an island located outside Haugesund. It has both solar (PV) and large penetration of wind power production but is mainly supplied from the mainland by ageing subsea cables. The island can only be reached by ferry, which there are plans to electrify. In addition, there are plans to increase industry loads on the island.
A new subsea cable is a large investment. Because a microgrid potentially can ensure the supply to the island in case of a failure on the subsea cable, CINELDI and Haugaland Kraft are investigating if a microgrid can work as a permanent or temporary alternative to reinvestment.
A battery energy storage system (BESS) for voltage support is being installed. An energy management system (EMS) is being established to optimise the operation of PV, wind power, battery and transferred energy from the mainland. The EMS and BESS will also play an important role in controlling the Utsira grid in Island mode.
In addition, Vehicle to grid (V2G) will be investigated in connection to the electrification of the ferry. Measurement equipment is being installed at the point of connection of the subsea cable, and other places in the grid to get more data for the load flow analysis. This project is closely connected to the other pilot where the role of market designed flexibility in the EMS system is investigated and tested.
Contact person at Haugaland Kraft: