Frost accumulates on earth wires and forces them down onto the phase conductors, creating a line fault that causes the power to be cut from the line. To prevent this problem, Fingrid dislodges the frost using a new helicopter technique. Nowadays, frost builds up in new places and in vastly different amounts every year.
Fingrid is currently responsible for arranging under-frequency control, but this responsibility will be spread more widely. In the future, distribution network operators and industrial operators connected to the transmission system will be responsible for under-frequency load shedding. These parties need to get themselves up to speed now, as all changes must be made by the end of 2022.
Network planning requires national and international cooperation. A vital tool for this is Europe’s ten-year network development plan (TYNDP), which is drafted every two years by the European Network of Transmission System Operators for Electricity (ENTSO-E).
A renewed system to measure power quality and new travelling wave fault location will improve power quality monitoring and disturbance clearing in Fingrid’s main grid. The investments in new measurement equipment allow more effective anticipation, location and investigation of faults that pose a threat to the main grid. This will also enhance electrical safety in the main grid.
The electricity transmission main grid got its start in 1929, and this year it will celebrate an impressive 90 years of operation. We’re celebrating this anniversary in a working way; grid development continues because the need to transmit electricity will grow in the future as well.