Korkeajänniteverkko

Korkeajänniteverkko, meaning high-voltage grid in Finnish, refers to the part of the electrical transmission system that operates at very high voltage levels. This system is crucial for transporting electricity efficiently over long distances from power generation plants to areas where it is consumed. The high voltage reduces power loss during transmission.

The Finnish high-voltage grid is managed by Fingrid Oyj, which is responsible for its planning, development, maintenance, and operation. This network consists of overhead power lines and underground cables that carry electricity at voltages typically ranging from 110 kilovolts (kV) up to 400 kV. These lines form the backbone of the national electricity supply, ensuring that power can be distributed reliably across the country.

The high-voltage grid is interconnected with neighboring countries' grids, such as those in Sweden, Estonia, and Russia, enabling international electricity trade and enhancing the security of supply. Substations are vital components of the grid, where voltage levels are transformed up for transmission and then down for distribution to lower voltage levels suitable for industrial, commercial, and residential use. The stable and secure operation of the korkeajänniteverkko is essential for the functioning of modern society and the economy.