Marjamäki

This group collects together data related to the marjamäki micro-grid area in Lempäälä. The grid is 20 kV and is connected to a 110 kV distribution network. The micro-grid includes various distributed energy resources: 2 solar power plants, 2 energy storage batteries, and natural gas engines. One of the batteries also works in parallel with a fuel cell. All these resources are connected to the 20 kV grid via 20/0.4 kV transformers. The ,maximum power for the first battery is 2.4 MW and its storage capacity is 1.6 MWh. For the other battery maximum power is 1.6 MW and storage capacity 1.3 MWh. For both solar power plants maximum power output is 2 MW. The micro-grid is capable of running in in island mode without out side power.