Power system

1.1.3 Power system

In 2016, electricity consumption in Finland amounted to 85.1 (82.5) terawatt hours. A total of 68.6 (67.9) terawatt hours of electricity was transmitted in Fingrid’s grid, representing 77.5 (77.1) per cent of the total transmission volume in Finland (consumption and inter-TSO).

Electricity import and production capacity was well sufficient to cover the peak consumption, which amounted to a maximum of 15,100 (13,500) megawatts. The peak consumption was at an all-time record high in Finland. During the consumption peaks early in the year, electricity production in Finland totalled approximately 10,800 (11,200) megawatts.

Electricity transmissions between Finland and Sweden consisted mostly of large imports to Finland. During 2016, 15.7 (17.8) terawatt hours of electricity was imported from Sweden to Finland, and 0.3 (0.2) terawatt hours were exported from Finland to Sweden.

The electricity transmission between Finland and Estonia was dominated by exports from Finland to Estonia, which amounted to 3.1 (5.0) terawatt hours.

The electricity imports from Russia increased by approximately 50 per cent. Nearly the full transmission capacity was available. Electricity imports from Russia totalled 5.9 (3.9) terawatt hours.

With a transmission reliability rate of 99.9998 per cent, the reliability of the transmission grid was at an excellent level during the year under review. The number of disturbances due to thunder exceeded the average, and the resulting multi-phase disturbances were detrimental to the process industry. Otherwise the number of disturbances remained at the normal level. Increased resources were allocated on determining the DC transmission links’ susceptibility to disturbances. Thanks to this, no disturbances requiring extensive repairs occurred in the DC links during 2016, and also less significant disturbances were cleared more quickly than in previous years. The total duration of interruptions due to disturbances in DC links in 2016 remained at around 10% of the 2014 and 2015 levels, and the number of interruptions was halved from the 2014 and 2015 figures.

Transmission outages in connection with investment projects mostly affected Ostrobothnia and northern Ostrobothnia. The outages were challenging and required careful advance planning and good cooperation with our customers. The outages were handled successfully. 

Counter trade Jan-Dec/16 Jan-Dec/15 Oct-Dec/16 Oct-Dec/15
Counter-trade between Finland and Sweden, €M 2.5 0.8 0.3 0.2
Counter-trade between Finland and Estonia, €M 0.1 0.8 0.0 0.0
Counter-trade between Finland's internal connections, €M 1.2 2.2 0.3 0.6
Total counter-trade, €M 3.9 3.8 0.6 0.9
         

Reserves required to maintain the power balance of the electricity system were procured from Finland, the other Nordic countries, the Baltic countries and Russia. Countertrade costs totalled EUR 3.9 (3.8) million. Countertrade refers to special adjustments made in the management of electricity transmission which are used to eliminate short-term bottlenecks (an area where electricity transmission is congested) from the grid. Fingrid guarantees the cross-border transmission it has confirmed by carrying out countertrades, i.e. purchasing and selling electricity, up until the end of the 24-hour usage period. The need for countertrade can arise from, for example, a power outage or disruption in a power plant or in the grid.

An outage in a connection point in the grid caused by a disturbance in Fingrid’s electricity network lasted an average of 2.1 minutes, which is clearly shorter than the ten-year average of 3.3 minutes. The estimated cost of the disturbances was EUR 3.5 (4.1) million.

Power system operation Jan-
Dec/16
Jan-Dec/15 Oct-
Dec/16
Oct-
Dec/15
Electricity consumption in Finland TWh 85.1 82.5 23.2 22.1
TSO transmission in Finland, TWh 3.5 5.5 0.4 1.4
Transmission within Finland, TWh 88.6 88.0 23.6 23.5
Fingrid's transmission volume TWh 68.6 67.9 17.4 17.7
Fingrid's electricity transmission to customers, TWh 64.9 62.3 16.8 16.3
Fingrid's loss energy volume TWh 1.3 1.4 0.3 0.3
Electricity transmission Finland - Sweden        
Exports to Sweden TWh 0.3 0.2 0.2 0.1
Imports from Sweden TWh 15.7 17.8 2.8 4.7
Electricity transmission Finland - Estonia        
Exports to Estonia TWh 3.1 5.0 0.2 1.2
Imports from Estonia TWh 0.7 0.0 0.5 0.0
Electricity transmission Finland - Russia        
Imports from Russia TWh 5.9 3.9 1.9 1.0