Hybrid power system on Danish off-grid island.

The off-grid island Livø achieves security of supply with intelligent system to manage the mix of power sources

Using DEIF AGC-4 and ASC-4 controllers, the off-grid Danish island of Livø has acquired a power management solution that ensures security of supply despite significant load variations, and with several renewables in the energy mix. The target is for the island to achieve 100% renewable energy self-sufficiency.

Most of us simply take for granted that there’s power in the sockets when we need to turn on the light or charge our cell phones. Indeed, most societies would grind to a halt without universal and reliable access to electrical power. Utilities must therefore safeguard security of supply – especially in isolated off-grid communities that rely on a local power supply.

The challenge is not power generation in itself which relies on well-known, tried and tested technologies, including renewables such as photovoltaics. “The real challenge is to find a controller that can balance everything so that when a cloud blocks out the sun, for example, another power source is ready to take over”, says Birgitte Palle Nielsen, project manager of Grøn Livø, an ongoing development project on the Danish island of Livø. Managed by the Nature Agency under the Ministry of Environment and Food of Denmark, the project is carried out in cooperation with Aalborg University and engineering companies COWI and Intego and funded in part by the Danish Energy Technology Development and Demonstration Programme.

“The real challenge is to find a controller that can balance everything so that when a cloud blocks out the sun, for example, another power source is ready to take over”

Birgitte Palle Nielsen

Project Manager |

“When everything is running as it should, you forget that the controllers are there. When something goes wrong, you are thankful that you have all these control options at your disposal!”

Martin Olsen

Forest Guard |