Fingrid currently has around 30 substation projects in progress in various parts of Finland. The construction of wind power and customers’ connection projects are the driving forces behind these investments. Fingrid’s first digital substation is under construction at Pernoonkoski in Kotka.
One of Fingrid’s duties is to connect new, high-capacity power plants to the main grid. The company has made careful preparations for the grid connection of Olkiluoto 3, one of the world’s largest power plant units. The final phase of these preparations includes the implementation of OL3 system protection, which will ensure that the power system functions reliably under all circumstances once the power plant is ready.
Fingrid is working with Leppäkosken Sähkö to test a fuel cell solution that can charge the substation’s batteries, thereby safeguarding its critical functions in the event of a disturbance. Fuel cells generate energy from a mixture of water and methanol.
An equipment failure that posed a serious risk to occupational safety occurred when a reactor circuit breaker broke in August. Fortunately this caused no personal injury.
Fingrid is building a new substation in Inkeroinen on a plot of land rented from Stora Enso. Connection bays to serve four main grid customers
The substations of the future will be digital. The first digital substation pilot is being built at Pernoonkoski substation. The objective is to test how a digital system functions in different situations.
Olkiluoto substation, which is one of the most important main grid hubs, will be renewed using a solution that is unique in Finland. Once Olkiluoto
Last summer’s fire at Olkiluoto substation was a practical test for Fingrid’s preparedness to act in a real situation involving the threat of an electricity shortage. The case provided experience and practice for internal coordination and contacts, and also for developing internal and external communications in serious situations.
A current transformer at Fingrid’s Olkiluoto substation was damaged on 18 July 2018. During the resulting fire and substation repair work, the electricity supply from both of Olkiluoto’s nuclear power plants to the main grid was interrupted.
A new type of Liekkiloukku (flame trap) cover solution has been completed at the transformer shield pool at Fingrid’s Ulvila substation. This is an innovative way to putting out liquid fires caused by accidents.
