Transmission reliability of Fingrid remained high in 2022

In 2022, the transmission reliability of the main grid managed by Fingrid reached again an excellent level of 99.99993%. The previous year's result was 99.99992%. The frequency quality of the Nordic synchronous area remained good and improved from the previous year.

The transmission reliability percentage describes the energy transmitted for consumption in the grid in relation to the energy that can be transmitted. The volume of electricity not transmitted for consumption due to disturbances was 51 MWh.

The effects of the disturbances on Fingrid's customers were small. The number of power supply interruptions (≥ 30 s) due to disturbances per connection point was only 0.15. Disturbances caused an average 4.7 minutes time with no electricity on connection points.

The calculated economic damage for consumer customers caused by disturbance outages was 4.7 million euros.

The energy not received from power plant production to the national grid was 1 002 MWh and the calculated economic damage of the energy not received was 123 thousand euros.

The frequency quality of the Nordic synchronous area was at a good level and improved from the previous year. In 2022, the frequency was outside the normal range (49.9–50.1 Hz) for about 9,400 minutes. The last time the quality of the frequency fell below 10,000 minutes was in 2020. The upper limit set by the European Network Code is 15,000 minutes and the Nordic goal is 10,000 minutes.

For more information, see our website's section Supply security on electricity:

https://www.fingrid.fi/en/grid/power-transmission/supply-security-of-electricity/

Further information:

Markku Piironen, Specialist, Fingrid Oyj

Email addresses are in the form firstname.lastname@fingrid.fi